release v2.1.5

Signed-off-by: Abirdcfly <fp544037857@gmail.com>

.github/workflows/codecov.yml

@@ -17,7 +17,7 @@ jobs:
           fetch-depth: 2
       - uses: actions/setup-go@v2
         with:
-          go-version: "1.16"
+          go-version: "1.18"
       - name: Run coverage
         run: go test -v ./... -coverprofile=coverage.txt -covermode=atomic
       - name: Upload coverage to Codecov

.gitignore

@@ -5,9 +5,6 @@ cryptor/*.txt
 fileutil/*.txt
 fileutil/*.zip
 fileutil/*.link
-fileutil/tempdir
 fileutil/unzip/*
 slice/testdata/*
-cryptor/*.pem
-docs/node_modules
-docs/.vitepress
+cryptor/*.pem

README.md

@@ -3,14 +3,13 @@
 
 <br/>
 
-![Go version](https://img.shields.io/badge/go-v1.16-9cf)
-[![Release](https://img.shields.io/badge/release-1.4.6-green.svg)](https://github.com/duke-git/lancet/releases)
-[![GoDoc](https://godoc.org/github.com//duke-git/lancet?status.svg)](https://pkg.go.dev/github.com/duke-git/lancet)
-[![Go Report Card](https://goreportcard.com/badge/github.com/duke-git/lancet)](https://goreportcard.com/report/github.com/duke-git/lancet)
+![Go version](https://img.shields.io/badge/go-%3E%3Dv1.18-9cf)
+[![Release](https://img.shields.io/badge/release-2.1.5-green.svg)](https://github.com/duke-git/lancet/releases)
+[![GoDoc](https://godoc.org/github.com/duke-git/lancet/v2?status.svg)](https://pkg.go.dev/github.com/duke-git/lancet/v2)
+[![Go Report Card](https://goreportcard.com/badge/github.com/duke-git/lancet/v2)](https://goreportcard.com/report/github.com/duke-git/lancet/v2)
 [![test](https://github.com/duke-git/lancet/actions/workflows/codecov.yml/badge.svg?branch=main&event=push)](https://github.com/duke-git/lancet/actions/workflows/codecov.yml)
 [![codecov](https://codecov.io/gh/duke-git/lancet/branch/main/graph/badge.svg?token=FC48T1F078)](https://codecov.io/gh/duke-git/lancet)
-[![License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/duke-git/lancet/blob/v1/LICENSE)
-
+[![License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/duke-git/lancet/blob/main/LICENSE)
 </div>
 
 <div STYLE="page-break-after: always;"></div>
@@ -23,15 +22,22 @@ English | [简体中文](./README_zh-CN.md)
 
 ## Feature
 
--   👏 Comprehensive, efficient and reusable.
--   💪 400+ go util functions, support string, slice, datetime, net, crypt...
--   💅 Only depend on the go standard library.
--   🌍 Unit test for every exported function.
+- 👏 Comprehensive, efficient and reusable.
+- 💪 300+ go util functions, support string, slice, datetime, net, crypt...
+- 💅 Only depend on the go standard library.
+- 🌍 Unit test for every exported function.
 
 ## Installation
+### Note:
 
+1. <b>For users who use go1.18 and above, it is recommended to install lancet v2.x.x. Cause v2.x.x rewrite all functions with generics of go1.18.</b>
 ```go
-go get github.com/duke-git/lancet
+go get github.com/duke-git/lancet/v2 // will install latest version of v2.x.x
+```
+
+2. <b>For users who use version below go1.18, you should install v1.x.x. now latest v1 is v1.3.1. </b>
+```go
+go get github.com/duke-git/lancet@v1.3.1 // below go1.18, install latest version of v1.x.x
 ```
 
 ## Usage
@@ -39,7 +45,7 @@ go get github.com/duke-git/lancet
 Lancet organizes the code into package structure, and you need to import the corresponding package name when use it. For example, if you use string-related functions,import the strutil package like below:
 
 ```go
-import "github.com/duke-git/lancet/strutil"
+import "github.com/duke-git/lancet/v2/strutil"
 ```
 
 ## Example
@@ -51,7 +57,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/strutil"
+    "github.com/duke-git/lancet/v2/strutil"
 )
 
 func main() {
@@ -63,499 +69,436 @@ func main() {
 
 ## API Documentation
 
-### 1. Compare package provides a lightweight comparison function on any type.
+### 1. Algorithm package implements some basic algorithm. eg. sort, search.
 
 ```go
-import "github.com/duke-git/lancet/compare"
+import "github.com/duke-git/lancet/v2/algorithm"
+```
+#### Function list:
+- [BubbleSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#BubbleSort)
+- [CountSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#CountSort)
+- [HeapSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#HeapSort)
+- [InsertionSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#InsertionSort)
+- [MergeSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#MergeSort)
+- [QuickSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#QuickSort)
+- [SelectionSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#SelectionSort)
+- [ShellSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#ShellSort)
+- [BinarySearch](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#BinarySearch)
+- [BinaryIterativeSearch](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#BinaryIterativeSearch)
+- [LinearSearch](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#LinearSearch)
+- [LRUCache](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#LRUCache)
+
+
+
+### 2. Concurrency package contain some functions to support concurrent programming. eg, goroutine, channel, async.
+
+```go
+import "github.com/duke-git/lancet/v2/concurrency"
+```
+#### Function list:
+- [NewChannel](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#NewChannel)
+- [Bridge](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#Bridge)
+- [FanIn](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#FanIn)
+- [Generate](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#Generate)
+- [Or](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#Or)
+- [OrDone](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#OrDone)
+- [Repeat](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#Repeat)
+- [RepeatFn](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#RepeatFn)
+- [Take](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#Take)
+- [Tee](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#Tee)
+
+### 3. Convertor package contains some functions for data convertion.
+
+```go
+import "github.com/duke-git/lancet/v2/convertor"
+```
+#### Function list:
+- [ColorHexToRGB](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ColorHexToRGB)
+- [ColorRGBToHex](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ColorRGBToHex)
+- [ToBool](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToBool)
+- [ToBytes](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToBytes)
+- [ToChar](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToChar)
+- [ToChannel](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToChannel)
+- [ToFloat](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToFloat)
+- [ToInt](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToInt)
+- [ToJson](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToJson)
+- [ToMap](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToMap)
+- [ToPointer](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToPointer)
+- [ToString](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToString)
+- [StructToMap](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#StructToMap)
+- [MapToSlice](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#MapToSlice)
+  
+### 4. Cryptor package is for data encryption and decryption.
+
+```go
+import "github.com/duke-git/lancet/v2/cryptor"
 ```
 
 #### Function list:
+- [AesEcbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesEcbEncrypt)
+- [AesEcbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesEcbDecrypt)
+- [AesCbcEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCbcEncrypt)
+- [AesCbcDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCbcDecrypt)
+- [AesCtrCrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCtrCrypt)
+- [AesCfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCfbEncrypt)
+- [AesCfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCfbDecrypt)
+- [AesOfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesOfbEncrypt)
+- [AesOfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesOfbDecrypt)
+- [Base64StdEncode](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Base64StdEncode)
+- [Base64StdDecode](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Base64StdDecode)
+- [DesEcbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesEcbEncrypt)
+- [DesEcbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesEcbDecrypt)
+- [DesCbcEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCbcEncrypt)
+- [DesCbcDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCbcDecrypt)
+- [DesCtrCrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCtrCrypt)
+- [DesCfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCfbEncrypt)
+- [DesCfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCfbDecrypt)
+- [DesOfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesOfbEncrypt)
+- [DesOfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesOfbDecrypt)
+- [HmacMd5](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#HmacMd5)
+- [HmacSha1](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#HmacSha1)
+- [HmacSha256](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#HmacSha256)
+- [HmacSha512](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#HmacSha512)
+- [Md5String](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Md5String)
+- [Md5File](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Md5File)
+- [Sha1](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Sha1)
+- [Sha256](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Sha256)
+- [Sha512](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Sha512)
+- [GenerateRsaKey](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#GenerateRsaKey)
+- [RsaEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#RsaEncrypt)
+- [RsaDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#RsaDecrypt)
 
--   [Equal](https://github.com/duke-git/lancet/blob/v1/docs/compare.md#Equal)
--   [EqualValue](https://github.com/duke-git/lancet/blob/v1/docs/compare.md#EqualValue)
--   [LessThan](https://github.com/duke-git/lancet/blob/v1/docs/compare.md#LessThan)
--   [GreaterThan](https://github.com/duke-git/lancet/blob/v1/docs/compare.md#GreaterThan)
--   [LessOrEqual](https://github.com/duke-git/lancet/blob/v1/docs/compare.md#LessOrEqual)
--   [GreaterOrEqual](https://github.com/duke-git/lancet/blob/v1/docs/compare.md#GreaterOrEqual)
+### 5. Datetime package supports date and time format and compare.
 
-### 2. Convertor package contains some functions for data convertion.
 
 ```go
-import "github.com/duke-git/lancet/convertor"
+import "github.com/duke-git/lancet/v2/datetime"
 ```
-
 #### Function list:
+- [AddDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#AddDay)
+- [AddHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#AddHour)
+- [AddMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#AddMinute)
+- [BeginOfMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfMinute)
+- [BeginOfHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfHour)
+- [BeginOfDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfDay)
+- [BeginOfWeek](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfWeek)
+- [BeginOfMonth](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfMonth)
+- [BeginOfYear](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfYear)
+- [EndOfMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfMinute)
+- [EndOfHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfHour)
+- [EndOfDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfDay)
+- [EndOfWeek](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfWeek)
+- [EndOfMonth](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfMonth)
+- [EndOfYear](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfYear)
+- [GetNowDate](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetNowDate)
+- [GetNowTime](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetNowTime)
+- [GetNowDateTime](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetNowDateTime)
+- [GetZeroHourTimestamp](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetZeroHourTimestamp)
+- [GetNightTimestamp](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetNightTimestamp)
+- [FormatTimeToStr](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#FormatTimeToStr)
+- [FormatStrToTime](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#FormatStrToTime)
+- [NewUnix](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#NewUnix)
+- [NewUnixNow](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#NewUnixNow)
+- [NewFormat](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#NewFormat)
+- [NewISO8601](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#NewISO8601)
+- [ToUnix](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#ToUnix)
+- [ToFormat](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#ToFormat)
+- [ToFormatForTpl](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#ToFormatForTpl)
+- [ToIso8601](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#ToIso8601)
 
--   [ColorHexToRGB](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ColorHexToRGB)
--   [ColorRGBToHex](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ColorRGBToHex)
--   [ToBool](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToBool)
--   [ToBytes](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToBytes)
--   [ToChar](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToChar)
--   [ToChannel](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToChannel)
--   [ToInt](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToInt)
--   [ToJson](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToJson)
--   [ToString](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToString)
--   [StructToMap](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#StructToMap)
--   [MapToStruct](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#MapToStruct)
--   [EncodeByte](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#EncodeByte)
--   [DecodeByte](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#DecodeByte)
--   [DeepClone](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#DeepClone)
--   [CopyProperties](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#CopyProperties)
--   [ToInterface](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToInterface)
--   [Utf8ToGbk](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#Utf8ToGbk)
--   [GbkToUtf8](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#GbkToUtf8)
--   [ToStdBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToStdBase64)
--   [ToUrlBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToUrlBase64)
--   [ToRawStdBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToRawStdBase64)
--   [ToRawUrlBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToRawUrlBase64)
--   [ToBigInt](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToBigInt)
 
-### 3. Cryptor package is for data encryption and decryption.
+
+### 6. Datastructure package constains some common data structure. eg. list, linklist, stack, queue, set, tree, graph.
+
 
 ```go
-import "github.com/duke-git/lancet/cryptor"
+import list "github.com/duke-git/lancet/v2/datastructure/list"
+import link "github.com/duke-git/lancet/v2/datastructure/link"
+import stack "github.com/duke-git/lancet/v2/datastructure/stack"
+import queue "github.com/duke-git/lancet/v2/datastructure/queue"
+import set "github.com/duke-git/lancet/v2/datastructure/set"
+import tree "github.com/duke-git/lancet/v2/datastructure/tree"
+import heap "github.com/duke-git/lancet/v2/datastructure/heap"
 ```
-
 #### Function list:
+- [List](https://github.com/duke-git/lancet/blob/main/docs/datastructure/list.md)
+- [Linklist](https://github.com/duke-git/lancet/blob/main/docs/datastructure/linklist.md)
+- [Stack](https://github.com/duke-git/lancet/blob/main/docs/datastructure/stack.md)
+- [Queue](https://github.com/duke-git/lancet/blob/main/docs/datastructure/queue.md)
+- [Set](https://github.com/duke-git/lancet/blob/main/docs/datastructure/set.md)
+- [Tree](https://github.com/duke-git/lancet/blob/main/docs/datastructure/tree.md)
+- [Heap](https://github.com/duke-git/lancet/blob/main/docs/datastructure/heap.md)
 
--   [AesEcbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#AesEcbEncrypt)
--   [AesEcbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#AesEcbDecrypt)
--   [AesCbcEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#AesCbcEncrypt)
--   [AesCbcDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#AesCbcDecrypt)
--   [AesCtrCrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#AesCtrCrypt)
--   [AesCfbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#AesCfbEncrypt)
--   [AesCfbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#AesCfbDecrypt)
--   [AesOfbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#AesOfbEncrypt)
--   [AesOfbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#AesOfbDecrypt)
--   [Base64StdEncode](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Base64StdEncode)
--   [Base64StdDecode](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Base64StdDecode)
--   [DesEcbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#DesEcbEncrypt)
--   [DesEcbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#DesEcbDecrypt)
--   [DesCbcEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#DesCbcEncrypt)
--   [DesCbcDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#DesCbcDecrypt)
--   [DesCtrCrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#DesCtrCrypt)
--   [DesCfbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#DesCfbEncrypt)
--   [DesCfbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#DesCfbDecrypt)
--   [DesOfbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#DesOfbEncrypt)
--   [DesOfbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#DesOfbDecrypt)
--   [HmacMd5](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#HmacMd5)
--   [HmacMd5WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#HmacMd5WithBase64)
--   [HmacSha1](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#HmacSha1)
--   [HmacSha1WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#HmacSha1WithBase64)
--   [HmacSha256](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#HmacSha256)
--   [HmacSha256WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#HmacSha256WithBase64)
--   [HmacSha512](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#HmacSha512)
--   [HmacSha512WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#HmacSha512WithBase64)
--   [Md5String](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Md5String)
--   [Md5StringWithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Md5StringWithBase64)
--   [Md5Byte](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Md5Byte)
--   [Md5ByteWithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Md5ByteWithBase64)
--   [Md5File](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Md5File)
--   [Sha1](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Sha1)
--   [Sha1WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Sha1WithBase64)
--   [Sha256](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Sha256)
--   [Sha256WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Sha256WithBase64)
--   [Sha512](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Sha512)
--   [Sha512WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Sha512WithBase64)
--   [GenerateRsaKey](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#GenerateRsaKey)
--   [RsaEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#RsaEncrypt)
--   [RsaDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#RsaDecrypt)
--   [GenerateRsaKeyPair](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#GenerateRsaKeyPair)
--   [RsaEncryptOAEP](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#RsaEncryptOAEP)
--   [RsaDecryptOAEP](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#RsaDecryptOAEP)
-### 4. Datetime package supports date and time format and compare.
+
+### 7. Fileutil package implements some basic functions for file operations.
 
 ```go
-import "github.com/duke-git/lancet/datetime"
-```
-
-#### Function list:
-
--   [AddDay](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#AddDay)
--   [AddHour](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#AddHour)
--   [AddMinute](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#AddMinute)
--   [AddYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#AddYear)
--   [BeginOfMinute](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfMinute)
--   [BeginOfHour](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfHour)
--   [BeginOfDay](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfDay)
--   [BeginOfWeek](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfWeek)
--   [BeginOfMonth](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfMonth)
--   [BeginOfYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfYear)
--   [EndOfMinute](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfMinute)
--   [EndOfHour](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfHour)
--   [EndOfDay](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfDay)
--   [EndOfWeek](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfWeek)
--   [EndOfMonth](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfMonth)
--   [EndOfYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfYear)
--   [GetNowDate](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#GetNowDate)
--   [GetNowTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#GetNowTime)
--   [GetNowDateTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#GetNowDateTime)
--   [GetZeroHourTimestamp](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#GetZeroHourTimestamp)
--   [GetNightTimestamp](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#GetNightTimestamp)
--   [FormatTimeToStr](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#FormatTimeToStr)
--   [FormatStrToTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#FormatStrToTime)
--   [NewUnix](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#NewUnix)
--   [NewUnixNow](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#NewUnixNow)
--   [NewFormat](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#NewFormat)
--   [NewISO8601](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#NewISO8601)
--   [ToUnix](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#ToUnix)
--   [ToFormat](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#ToFormat)
--   [ToFormatForTpl](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#ToFormatForTpl)
--   [ToIso8601](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#ToIso8601)
--   [IsLeapYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#IsLeapYear)
--   [BetweenSeconds](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BetweenSeconds)
--   [DayOfYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#DayOfYear)
--   [IsWeekend](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#IsWeekend)
--   [NowDateOrTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#NowDateOrTime)
--   [Timestamp](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#Timestamp)
--   [TimestampMilli](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#TimestampMilli)
--   [TimestampMicro](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#TimestampMicro)
--   [TimestampNano](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#TimestampNano)
--   [TrackFuncTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#TrackFuncTime)
--   [DaysBetween](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#DaysBetween)
--   [GenerateDatetimesBetween](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#GenerateDatetimesBetween)
-
-### 5. Fileutil package implements some basic functions for file operations.
-
-```go
-import "github.com/duke-git/lancet/fileutil"
+import "github.com/duke-git/lancet/v2/fileutil"
 ```
 
 #### Function list：
 
--   [ClearFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#ClearFile)
--   [CreateFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#CreateFile)
--   [CreateDir](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#CreateDir)
--   [CopyFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#CopyFile)
--   [FileMode](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#FileMode)
--   [MiMeType](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#MiMeType)
--   [IsExist](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#IsExist)
--   [IsLink](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#IsLink)
--   [IsDir](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#IsDir)
--   [ListFileNames](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#ListFileNames)
--   [RemoveFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#RemoveFile)
--   [ReadFileToString](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#ReadFileToString)
--   [ReadFileByLine](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#ReadFileByLine)
--   [Zip](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#Zip)
--   [ZipAppendEntry](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#ZipAppendEntry)
--   [UnZip](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#UnZip)
--   [CurrentPath](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#CurrentPath)
--   [IsZipFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#IsZipFile)
--   [FileSize](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#FileSize)
--   [MTime](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#MTime)
--   [Sha](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#Sha)
--   [ReadCsvFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#ReadCsvFile)
--   [WriteCsvFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#WriteCsvFile)
--   [WriteMapsToCsv](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#WriteMapsToCsv)
--   [WriteStringToFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#WriteStringToFile)
--   [WriteBytesToFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#WriteBytesToFile)
--   [ReadFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#ReadFile)
+- [ClearFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#ClearFile)
+- [CreateFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#CreateFile)
+- [CreateDir](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#CreateDir)
+- [CopyFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#CopyFile)
+- [FileMode](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#FileMode)
+- [MiMeType](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#MiMeType)
+- [IsExist](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#IsExist)
+- [IsLink](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#IsLink)
+- [IsDir](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#IsDir)
+- [ListFileNames](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#ListFileNames)
+- [RemoveFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#RemoveFile)
+- [ReadFileToString](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#ReadFileToString)
+- [ReadFileByLine](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#ReadFileByLine)
+- [Zip](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#Zip)
+- [UnZip](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#UnZip)
 
-### 6. Formatter contains some functions for data formatting.
+### 8. Formatter contains some functions for data formatting.
 
 ```go
-import "github.com/duke-git/lancet/formatter"
+import "github.com/duke-git/lancet/v2/formatter"
+```
+#### Function list:
+- [Comma](https://github.com/duke-git/lancet/blob/main/docs/formatter.md#Comma)
+
+### 9. Function package can control the flow of function execution and support part of functional programming
+
+```go
+import "github.com/duke-git/lancet/v2/function"
+```
+
+#### Function list:
+- [After](https://github.com/duke-git/lancet/blob/main/docs/function.md#After)
+- [Before](https://github.com/duke-git/lancet/blob/main/docs/function.md#Before)
+- [Curry](https://github.com/duke-git/lancet/blob/main/docs/function.md#Curry)
+- [Compose](https://github.com/duke-git/lancet/blob/main/docs/function.md#Compose)
+- [Debounced](https://github.com/duke-git/lancet/blob/main/docs/function.md#Debounced)
+- [Delay](https://github.com/duke-git/lancet/blob/main/docs/function.md#Delay)
+- [Watcher](https://github.com/duke-git/lancet/blob/main/docs/function.md#Watcher)
+
+
+### 10. Maputil package includes some functions to manipulate map.
+
+```go
+import "github.com/duke-git/lancet/v2/maputil"
+```
+
+#### Function list:
+- [ForEach](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#ForEach)
+- [Filter](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#Filter)
+- [Intersect](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#Intersect)
+- [Keys](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#Keys)
+- [Merge](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#Merge)
+- [Minus](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#Minus)
+- [Values](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#Values)
+- [IsDisjoint](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#IsDisjoint)
+
+
+### 11. Mathutil package implements some functions for math calculation.
+
+```go
+import "github.com/duke-git/lancet/v2/mathutil"
+```
+
+#### Function list:
+- [Average](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Average)
+- [Exponent](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Exponent)
+- [Fibonacci](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Fibonacci)
+- [Factorial](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Factorial)
+- [Max](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Max)
+- [MaxBy](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#MaxBy)
+- [Min](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Min)
+- [MinBy](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#MinBy)
+- [Percent](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Percent)
+- [RoundToFloat](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#RoundToFloat)
+- [RoundToString](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#RoundToString)
+- [TruncRound](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#TruncRound)
+
+
+### 12. Netutil package contains functions to get net information and send http request.
+
+```go
+import "github.com/duke-git/lancet/v2/netutil"
+```
+
+#### Function list:
+- [ConvertMapToQueryString](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#ConvertMapToQueryString)
+- [EncodeUrl](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#EncodeUrl)
+- [GetInternalIp](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetInternalIp)
+- [GetIps](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetIps)
+- [GetMacAddrs](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetMacAddrs)
+- [GetPublicIpInfo](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetPublicIpInfo)
+- [GetRequestPublicIp](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetRequestPublicIp)
+- [IsPublicIP](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#IsPublicIP)
+- [IsInternalIP](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#IsInternalIP)
+- [HttpGet](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpGet)
+- [HttpDelete](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpDelete)
+- [HttpPost](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpPost)
+- [HttpPut](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpPut)
+- [HttpPatch](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpPatch)
+- [ParseHttpResponse](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#ParseHttpResponse)
+
+### 13. Random package implements some basic functions to generate random int and string.
+
+```go
+import "github.com/duke-git/lancet/v2/random"
+```
+
+#### Function list:
+- [RandBytes](https://github.com/duke-git/lancet/blob/main/docs/random.md#RandBytes)
+- [RandInt](https://github.com/duke-git/lancet/blob/main/docs/random.md#RandInt)
+- [RandString](https://github.com/duke-git/lancet/blob/main/docs/random.md#RandString)
+- [UUIdV4](https://github.com/duke-git/lancet/blob/main/docs/random.md#UUIdV4)
+
+### 14. Retry package is for executing a function repeatedly until it was successful or canceled by the context.
+
+```go
+import "github.com/duke-git/lancet/v2/retry"
+```
+
+#### Function list:
+- [Context](https://github.com/duke-git/lancet/blob/main/docs/retry.md#Context)
+- [Retry](https://github.com/duke-git/lancet/blob/main/docs/retry.md#Retry)
+- [RetryFunc](https://github.com/duke-git/lancet/blob/main/docs/retry.md#RetryFunc)
+- [RetryDuration](https://github.com/duke-git/lancet/blob/main/docs/retry.md#RetryDuration)
+- [RetryTimes](https://github.com/duke-git/lancet/blob/main/docs/retry.md#RetryTimes)
+
+### 15. Slice contains some functions to manipulate slice.
+
+```go
+import "github.com/duke-git/lancet/v2/slice"
+```
+
+#### Function list:
+- [AppendIfAbsent](https://github.com/duke-git/lancet/blob/main/docs/slice.md#AppendIfAbsent)
+- [Contain](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Contain)
+- [ContainSubSlice](https://github.com/duke-git/lancet/blob/main/docs/slice.md#ContainSubSlice)
+- [Chunk](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Chunk)
+- [Compact](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Compact)
+- [Concat](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Concat)
+- [Count](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Count)
+- [Difference](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Difference)
+- [DifferenceBy](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DifferenceBy)
+- [DifferenceWith](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DifferenceWith)
+- [DeleteAt](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DeleteAt)
+- [Drop](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Drop)
+- [Equal](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Equal)
+- [EqualWith](https://github.com/duke-git/lancet/blob/main/docs/slice.md#EqualWith)
+- [Every](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Every)
+- [Filter](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Filter)
+- [Find](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Find)
+- [FindLast](https://github.com/duke-git/lancet/blob/main/docs/slice.md#FindLast)
+- [Flatten](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Flatten)
+- [FlattenDeep](https://github.com/duke-git/lancet/blob/main/docs/slice.md#FlattenDeep)
+- [ForEach](https://github.com/duke-git/lancet/blob/main/docs/slice.md#ForEach)
+- [GroupBy](https://github.com/duke-git/lancet/blob/main/docs/slice.md#GroupBy)
+- [GroupWith](https://github.com/duke-git/lancet/blob/main/docs/slice.md#GroupWith)
+- [IntSlice](https://github.com/duke-git/lancet/blob/main/docs/slice.md#IntSlice)
+- [InterfaceSlice](https://github.com/duke-git/lancet/blob/main/docs/slice.md#InterfaceSlice)
+- [Intersection](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Intersection)
+- [InsertAt](https://github.com/duke-git/lancet/blob/main/docs/slice.md#InsertAt)
+- [IndexOf](https://github.com/duke-git/lancet/blob/main/docs/slice.md#IndexOf)
+- [LastIndexOf](https://github.com/duke-git/lancet/blob/main/docs/slice.md#LastIndexOf)
+- [Map](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Map)
+- [Reverse](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Reverse)
+- [Reduce](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Reduce)
+- [Shuffle](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Shuffle)
+- [SortByField](https://github.com/duke-git/lancet/blob/main/docs/slice.md#SortByField)
+- [Some](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Some)
+- [StringSlice](https://github.com/duke-git/lancet/blob/main/docs/slice.md#StringSlice)
+- [SymmetricDifference](https://github.com/duke-git/lancet/blob/main/docs/slice.md#SymmetricDifference)
+- [ToSlice](https://github.com/duke-git/lancet/blob/main/docs/slice.md#ToSlice)
+- [ToSlicePointer](https://github.com/duke-git/lancet/blob/main/docs/slice.md#ToSlicePointer)
+- [Unique](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Unique)
+- [UniqueBy](https://github.com/duke-git/lancet/blob/main/docs/slice.md#UniqueBy)
+- [Union](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Union)
+- [UpdateAt](https://github.com/duke-git/lancet/blob/main/docs/slice.md#UpdateAt)
+- [Without](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Without)
+
+### 16. Strutil package contains some functions to manipulate string.
+```go
+import "github.com/duke-git/lancet/v2/strutil"
 ```
 
 #### Function list:
 
--   [Comma](https://github.com/duke-git/lancet/blob/v1/docs/formatter.md#Comma)
--   [Pretty](https://github.com/duke-git/lancet/blob/v1/docs/formatter.md#Pretty)
--   [PrettyToWriter](https://github.com/duke-git/lancet/blob/v1/docs/formatter.md#PrettyToWriter)
--   [DecimalBytes](https://github.com/duke-git/lancet/blob/v1/docs/formatter.md#DecimalBytes)
--   [BinaryBytes](https://github.com/duke-git/lancet/blob/v1/docs/formatter.md#BinaryBytes)
--   [ParseDecimalBytes](https://github.com/duke-git/lancet/blob/v1/docs/formatter.md#ParseDecimalBytes)
--   [ParseBinaryBytes](https://github.com/duke-git/lancet/blob/v1/docs/formatter.md#ParseBinaryBytes)
-
-### 7. Function package can control the flow of function execution and support part of functional programming
+- [After](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#After)
+- [AfterLast](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#AfterLast)
+- [Before](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#Before)
+- [BeforeLast](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#BeforeLast)
+- [CamelCase](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#CamelCase)
+- [Capitalize](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#Capitalize)
+- [IsString](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#IsString)
+- [KebabCase](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#KebabCase)
+- [LowerFirst](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#LowerFirst)
+- [UpperFirst](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#UpperFirst)
+- [PadEnd](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#PadEnd)
+- [PadStart](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#PadStart)
+- [Reverse](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#Reverse)
+- [SnakeCase](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#SnakeCase)
+- [SplitEx](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#SplitEx)
+- [Wrap](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#Wrap)
+- [Unwrap](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#Unwrap)
+  
+### 17. System package contain some functions about os, runtime, shell command.
 
 ```go
-import "github.com/duke-git/lancet/function"
+import "github.com/duke-git/lancet/v2/system"
+```
+#### Function list:
+- [IsWindows](https://github.com/duke-git/lancet/blob/main/docs/system.md#IsWindows)
+- [IsLinux](https://github.com/duke-git/lancet/blob/main/docs/system.md#IsLinux)
+- [IsMac](https://github.com/duke-git/lancet/blob/main/docs/system.md#IsMac)
+- [GetOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system.md#GetOsEnv)
+- [SetOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system.md#SetOsEnv)
+- [RemoveOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system.md#RemoveOsEnv)
+- [CompareOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system.md#CompareOsEnv)
+- [ExecCommand](https://github.com/duke-git/lancet/blob/main/docs/system.md#ExecCommand)
+- [GetOsBits](https://github.com/duke-git/lancet/blob/main/docs/system.md#GetOsBits)
+
+### 18. Validator package contains some functions for data validation.
+
+```go
+import "github.com/duke-git/lancet/v2/validator"
 ```
 
 #### Function list:
 
--   [After](https://github.com/duke-git/lancet/blob/v1/docs/function.md#After)
--   [Before](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Before)
--   [Curry](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Curry)
--   [Compose](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Compose)
--   [Debounced](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Debounced)
--   [Debounce](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Debounce)
--   [Throttle](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Throttle)
--   [Delay](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Delay)
--   [Pipeline](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Pipeline)
--   [Schedule](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Schedule)
--   [Watcher](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Watcher)
-
-### 8. Mathutil package implements some functions for math calculation.
+- [ContainChinese](https://github.com/duke-git/lancet/blob/main/docs/validator.md#ContainChinese)
+- [ContainLetter](https://github.com/duke-git/lancet/blob/main/docs/validator.md#ContainLetter)
+- [ContainLower](https://github.com/duke-git/lancet/blob/main/docs/validator.md#ContainLower)
+- [ContainUpper](https://github.com/duke-git/lancet/blob/main/docs/validator.md#ContainUpper)
+- [IsAlpha](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsAlpha)
+- [IsAllUpper](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsAllUpper)
+- [IsAllLower](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsAllLower)
+- [IsBase64](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsBase64)
+- [IsChineseMobile](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsChineseMobile)
+- [IsChineseIdNum](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsChineseIdNum)
+- [IsChinesePhone](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsChinesePhone)
+- [IsCreditCard](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsCreditCard)
+- [IsDns](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsDns)
+- [IsEmail](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsEmail)
+- [IsEmptyString](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsEmptyString)
+- [IsFloatStr](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsFloatStr)
+- [IsNumberStr](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsNumberStr)
+- [IsJSON](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsJSON)
+- [IsRegexMatch](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsRegexMatch)
+- [IsIntStr](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsIntStr)
+- [IsIp](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsIp)
+- [IsIpV4](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsIpV4)
+- [IsIpV6](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsIpV6)
+- [IsStrongPassword](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsStrongPassword)
+- [IsUrl](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsUrl)
+- [IsWeakPassword](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsWeakPassword)
+### 19. xerror package implements helpers for errors.
 
 ```go
-import "github.com/duke-git/lancet/mathutil"
+import "github.com/duke-git/lancet/v2/xerror"
 ```
-
 #### Function list:
-
--   [Exponent](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#Exponent)
--   [Fibonacci](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#Fibonacci)
--   [Factorial](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#Factorial)
--   [Percent](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#Percent)
--   [RoundToFloat](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#RoundToFloat)
--   [RoundToString](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#RoundToString)
--   [TruncRound](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#TruncRound)
--   [CeilToFloat](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#CeilToFloat)
--   [CeilToString](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#CeilToString)
--   [FloorToFloat](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#FloorToFloat)
--   [FloorToString](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#FloorToString)
--   [AngleToRadian](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#AngleToRadian)
--   [RadianToAngle](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#RadianToAngle)
--   [PointDistance](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#PointDistance)
--   [IsPrime](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#IsPrime)
--   [GCD](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#GCD)
--   [LCM](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#LCM)
--   [Cos](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#Cos)
--   [Sin](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#Sin)
--   [Log](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#Log)
-
-### 9. Netutil package contains functions to get net information and send http request.
-
-```go
-import "github.com/duke-git/lancet/netutil"
-```
-
-#### Function list:
-
--   [ConvertMapToQueryString](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#ConvertMapToQueryString)
--   [EncodeUrl](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#EncodeUrl)
--   [GetInternalIp](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#GetInternalIp)
--   [GetIps](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#GetIps)
--   [GetMacAddrs](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#GetMacAddrs)
--   [GetPublicIpInfo](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#GetPublicIpInfo)
--   [GetRequestPublicIp](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#GetRequestPublicIp)
--   [IsPublicIP](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#IsPublicIP)
--   [IsInternalIP](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#IsInternalIP)
--   [HttpGet](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#HttpGet)
--   [HttpDelete](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#HttpDelete)
--   [HttpPost](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#HttpPost)
--   [HttpPut](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#HttpPut)
--   [HttpPatch](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#HttpPatch)
--   [ParseHttpResponse](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#ParseHttpResponse)
--   [UploadFile](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#UploadFile)
--   [DownloadFile](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#DownloadFile)
--   [IsPingConnected](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#IsPingConnected)
--   [IsTelnetConnected](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#IsTelnetConnected)
-
-### 10. Random package implements some basic functions to generate random int and string.
-
-```go
-import "github.com/duke-git/lancet/random"
-```
-
-#### Function list:
-
--   [RandBool](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandBool)
--   [RandBoolSlice](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandBoolSlice)
--   [RandBytes](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandBytes)
--   [RandInt](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandInt)
--   [RandIntSlice](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandIntSlice)
--   [RandString](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandString)
--   [RandStringSlice](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandStringSlice)
--   [RandFloat](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandFloat)
--   [RandFloats](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandFloats)
--   [RandUpper](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandUpper)
--   [RandLower](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandLower)
--   [RandNumeral](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandNumeral)
--   [RandNumeralOrLetter](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandNumeralOrLetter)
--   [UUIdV4](https://github.com/duke-git/lancet/blob/v1/docs/random.md#UUIdV4)
--   [RandUniqueIntSlice](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandUniqueIntSlice)
-
-### 11. Retry package is for executing a function repeatedly until it was successful or canceled by the context.
-
-```go
-import "github.com/duke-git/lancet/retry"
-```
-
-#### Function list:
-
--   [Context](https://github.com/duke-git/lancet/blob/v1/docs/retry.md#Context)
--   [Retry](https://github.com/duke-git/lancet/blob/v1/docs/retry.md#Retry)
--   [RetryFunc](https://github.com/duke-git/lancet/blob/v1/docs/retry.md#RetryFunc)
--   [RetryDuration](https://github.com/duke-git/lancet/blob/v1/docs/retry.md#RetryDuration)
--   [RetryTimes](https://github.com/duke-git/lancet/blob/v1/docs/retry.md#RetryTimes)
-
-### 12. Slice contains some functions to manipulate slice.
-
-```go
-import "github.com/duke-git/lancet/slice"
-```
-
-#### Function list:
-
--   [AppendIfAbsent](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#AppendIfAbsent)
--   [Contain](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Contain)
--   [ContainSubSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#ContainSubSlice)
--   [Chunk](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Chunk)
--   [Compact](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Compact)
--   [Concat](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Concat)
--   [Count](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Count)
--   [Difference](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Difference)
--   [DifferenceBy](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#DifferenceBy)
--   [DeleteByIndex](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#DeleteByIndex)
--   [Drop](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Drop)
--   [Every](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Every)
--   [Equal](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Equal)
--   [EqualWith](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#EqualWith)
--   [Filter](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Filter)
--   [Find](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Find)
--   [FindLast](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#FindLast)
--   [FlattenDeep](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#FlattenDeep)
--   [ForEach](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#ForEach)
--   [GroupBy](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#GroupBy)
--   [IntSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#IntSlice)
--   [IndexOf](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#IndexOf)
--   [LastIndexOf](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#LastIndexOf)
--   [InterfaceSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#InterfaceSlice)
--   [Intersection](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Intersection)
--   [InsertByIndex](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#InsertByIndex)
--   [Map](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Map)
--   [ReverseSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#ReverseSlice)
--   [Reduce](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Reduce)
--   [Shuffle](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Shuffle)
--   [SortByField](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#SortByField)
--   [Some](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Some)
--   [StringSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#StringSlice)
--   [ToSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#ToSlice)
--   [ToSlicePointer](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#ToSlice)
--   [Unique](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Unique)
--   [UniqueBy](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#UniqueBy)
--   [Union](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Union)
--   [UpdateByIndex](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#UpdateByIndex)
--   [Without](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Without)
--   [Join](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Join)
-
-### 13. Strutil package contains some functions to manipulate string.
-
-```go
-import "github.com/duke-git/lancet/strutil"
-```
-
-#### Function list:
-
--   [After](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#After)
--   [AfterLast](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#AfterLast)
--   [Before](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Before)
--   [BeforeLast](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#BeforeLast)
--   [CamelCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#CamelCase)
--   [Capitalize](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Capitalize)
--   [ContainsAll](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#ContainsAll)
--   [ContainsAny](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#ContainsAny)
--   [IsString](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#IsString)
--   [KebabCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#KebabCase)
--   [UpperKebabCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#UpperKebabCase)
--   [LowerFirst](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#LowerFirst)
--   [UpperFirst](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#UpperFirst)
--   [Pad](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Pad)
--   [PadEnd](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#PadEnd)
--   [PadStart](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#PadStart)
--   [Reverse](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Reverse)
--   [SnakeCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#SnakeCase)
--   [UpperSnakeCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#UpperSnakeCase)
--   [SplitEx](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#SplitEx)
--   [Wrap](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Wrap)
--   [Unwrap](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Unwrap)
--   [SplitWords](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#SplitWords)
--   [WordCount](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#WordCount)
--   [RemoveNonPrintable](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#RemoveNonPrintable)
--   [StringToBytes](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#StringToBytes)
--   [BytesToString](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#BytesToString)
--   [IsBlank](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#IsBlank)
--   [HasPrefixAny](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#HasPrefixAny)
--   [HasSuffixAny](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#HasSuffixAny)
--   [IndexOffset](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#IndexOffset)
--   [ReplaceWithMap](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#ReplaceWithMap)
--   [Trim](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Trim)
--   [SplitAndTrim](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#SplitAndTrim)
--   [HideString](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#HideString)
--   [RemoveWhiteSpace](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#RemoveWhiteSpace)
--   [SubInBetween](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#SubInBetween)
--   [HammingDistance](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#HammingDistance)
--   [Concat](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Concat)
--   [Ellipsis](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Ellipsis)
--   [Shuffle](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Shuffle)
--   [Rotate](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Rotate)
--   [TemplateReplace](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#TemplateReplace)
--   [RegexMatchAllGroups](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#RegexMatchAllGroups)
--   [Cut](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Cut)
-
-
-### 14. System package contain some functions about os, runtime, shell command.
-
-```go
-import "github.com/duke-git/lancet/system"
-```
-
-#### Function list:
-
--   [IsWindows](https://github.com/duke-git/lancet/blob/v1/docs/system.md#IsWindows)
--   [IsLinux](https://github.com/duke-git/lancet/blob/v1/docs/system.md#IsLinux)
--   [IsMac](https://github.com/duke-git/lancet/blob/v1/docs/system.md#IsMac)
--   [GetOsEnv](https://github.com/duke-git/lancet/blob/v1/docs/system.md#GetOsEnv)
--   [SetOsEnv](https://github.com/duke-git/lancet/blob/v1/docs/system.md#SetOsEnv)
--   [RemoveOsEnv](https://github.com/duke-git/lancet/blob/v1/docs/system.md#RemoveOsEnv)
--   [CompareOsEnv](https://github.com/duke-git/lancet/blob/v1/docs/system.md#CompareOsEnv)
--   [ExecCommand](https://github.com/duke-git/lancet/blob/v1/docs/system.md#ExecCommand)
--   [GetOsBits](https://github.com/duke-git/lancet/blob/v1/docs/system.md#GetOsBits)
-
-### 15. Validator package contains some functions for data validation.
-
-```go
-import "github.com/duke-git/lancet/validator"
-```
-
-#### Function list:
-
--   [ContainChinese](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#ContainChinese)
--   [ContainLetter](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#ContainLetter)
--   [ContainLower](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#ContainLower)
--   [ContainUpper](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#ContainUpper)
--   [IsAlpha](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsAlpha)
--   [IsAllUpper](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsAllUpper)
--   [IsAllLower](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsAllLower)
--   [IsBase64](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsBase64)
--   [IsChineseMobile](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsChineseMobile)
--   [IsChineseIdNum](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsChineseIdNum)
--   [IsChinesePhone](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsChinesePhone)
--   [IsCreditCard](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsCreditCard)
--   [IsDns](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsDns)
--   [IsEmail](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsEmail)
--   [IsEmptyString](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsEmptyString)
--   [IsInt](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsInt)
--   [IsFloat](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsFloat)
--   [IsNumber](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsNumber)
--   [IsIntStr](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsIntStr)
--   [IsFloatStr](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsFloatStr)
--   [IsNumberStr](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsNumberStr)
--   [IsJSON](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsJSON)
--   [IsRegexMatch](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsRegexMatch)
--   [IsIp](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsIp)
--   [IsIpV4](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsIpV4)
--   [IsIpV6](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsIpV6)
--   [IsStrongPassword](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsStrongPassword)
--   [IsUrl](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsUrl)
--   [IsWeakPassword](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsWeakPassword)
--   [IsZeroValue](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsZeroValue)
--   [IsGBK](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsGBK)
--   [IsASCII](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsASCII)
--   [IsPrintable](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsPrintable)
--   [IsBin](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsBin)
--   [IsHex](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsHex)
--   [IsBase64URL](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsBase64URL)
--   [IsJWT](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsJWT)
--   [IsVisa](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsVisa)
--   [IsMasterCard](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsMasterCard)
--   [IsAmericanExpress](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsAmericanExpress)
--   [IsUnionPay](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsUnionPay)
--   [IsChinaUnionPay](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsChinaUnionPay)
-
+- [Unwrap](https://github.com/duke-git/lancet/blob/main/docs/xerror.md#Unwrap)
+  
 
 ## How to Contribute
 

README_zh-CN.md

@@ -3,14 +3,13 @@
 
 <br/>
 
-![Go version](https://img.shields.io/badge/go-v1.16-9cf)
-[![Release](https://img.shields.io/badge/release-1.4.6-green.svg)](https://github.com/duke-git/lancet/releases)
-[![GoDoc](https://godoc.org/github.com//duke-git/lancet?status.svg)](https://pkg.go.dev/github.com/duke-git/lancet)
-[![Go Report Card](https://goreportcard.com/badge/github.com/duke-git/lancet)](https://goreportcard.com/report/github.com/duke-git/lancet)
+![Go version](https://img.shields.io/badge/go-%3E%3Dv1.18-9cf)
+[![Release](https://img.shields.io/badge/release-2.1.5-green.svg)](https://github.com/duke-git/lancet/releases)
+[![GoDoc](https://godoc.org/github.com/duke-git/lancet/v2?status.svg)](https://pkg.go.dev/github.com/duke-git/lancet/v2)
+[![Go Report Card](https://goreportcard.com/badge/github.com/duke-git/lancet/v2)](https://goreportcard.com/report/github.com/duke-git/lancet/v2)
 [![test](https://github.com/duke-git/lancet/actions/workflows/codecov.yml/badge.svg?branch=main&event=push)](https://github.com/duke-git/lancet/actions/workflows/codecov.yml)
 [![codecov](https://codecov.io/gh/duke-git/lancet/branch/main/graph/badge.svg?token=FC48T1F078)](https://codecov.io/gh/duke-git/lancet)
-[![License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/duke-git/lancet/blob/v1/LICENSE)
-
+[![License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/duke-git/lancet/blob/main/LICENSE)
 </div>
 
 <div STYLE="page-break-after: always;"></div>
@@ -20,37 +19,45 @@
 
 简体中文 | [English](./README.md)
 
+
 ## 特性
 
--   👏 全面、高效、可复用
--   💪 400+常用 go 工具函数，支持 string、slice、datetime、net、crypt...
--   💅 只依赖 go 标准库
--   🌍 所有导出函数单元测试覆盖率 100%
+- 👏 全面、高效、可复用
+- 💪 300+常用go工具函数，支持string、slice、datetime、net、crypt...
+- 💅 只依赖go标准库
+- 🌍 所有导出函数单元测试覆盖率100%
 
 ## 安装
+### Note: 
+1. <b>对于使用go1.18及以上的用户，建议安装v2.x.x。 因为v2.x.x用go1.18的泛型重写了大部分函数。</b>
 
 ```go
-go get github.com/duke-git/lancet
+go get github.com/duke-git/lancet/v2 //安装v2最新版本v2.x.x
+```
+
+2. <b>使用go1.18以下版本的用户，必须安装v1.x.x。目前最新的v1版本是v1.3.1。</b>
+```go
+go get github.com/duke-git/lancet@v1.3.1 // 使用go1.18以下版本, 必须安装v1.x.x版本
 ```
 
 ## 用法
 
-lancet 是以包的结构组织代码的，使用时需要导入相应的包名。例如：如果使用字符串相关函数，需要导入 strutil 包:
+lancet是以包的结构组织代码的，使用时需要导入相应的包名。例如：如果使用字符串相关函数，需要导入strutil包:
 
 ```go
-import "github.com/duke-git/lancet/strutil"
+import "github.com/duke-git/lancet/v2/strutil"
 ```
 
 ## 例子
 
-此处以字符串工具函数 Reverse（逆序字符串）为例，需要导入 strutil 包:
+此处以字符串工具函数Reverse（逆序字符串）为例，需要导入strutil包:
 
 ```go
 package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/strutil"
+    "github.com/duke-git/lancet/v2/strutil"
 )
 
 func main() {
@@ -60,509 +67,442 @@ func main() {
 }
 ```
 
-## API 文档
+## API文档
 
+### 1. algorithm算法包实现一些基本算法。eg. sort, search.
 
-### 1. compare包提供几个轻量级的类型比较函数。
 ```go
-import "github.com/duke-git/lancet/compare"
+import "github.com/duke-git/lancet/v2/algorithm"
 ```
-
 #### Function list:
+- [BubbleSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#BubbleSort)
+- [CountSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#CountSort)
+- [HeapSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#HeapSort)
+- [InsertionSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#InsertionSort)
+- [MergeSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#MergeSort)
+- [QuickSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#QuickSort)
+- [SelectionSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#SelectionSort)
+- [ShellSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#ShellSort)
+- [BinarySearch](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#BinarySearch)
+- [BinaryIterativeSearch](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#BinaryIterativeSearch)
+- [LinearSearch](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#LinearSearch)
+- [LRUCache](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#LRUCache)
 
--   [Equal](https://github.com/duke-git/lancet/blob/v1/docs/compare_zh-CN.md#Equal)
--   [EqualValue](https://github.com/duke-git/lancet/blob/v1/docs/compare_zh-CN.md#EqualValue)
--   [LessThan](https://github.com/duke-git/lancet/blob/v1/docs/compare_zh-CN.md#LessThan)
--   [GreaterThan](https://github.com/duke-git/lancet/blob/v1/docs/compare_zh-CN.md#GreaterThan)
--   [LessOrEqual](https://github.com/duke-git/lancet/blob/v1/docs/compare_zh-CN.md#LessOrEqual)
--   [GreaterOrEqual](https://github.com/duke-git/lancet/blob/v1/docs/compare_zh-CN.md#GreaterOrEqual)
 
-### 2. convertor转换器包支持一些常见的数据类型转换。
+### 2. 并发包包含一些支持并发编程的功能。例如：goroutine, channel, async等。
 
 ```go
-import "github.com/duke-git/lancet/convertor"
+import "github.com/duke-git/lancet/v2/concurrency"
+```
+#### Function list:
+- [NewChannel](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#NewChannel)
+- [Bridge](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#Bridge)
+- [FanIn](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#FanIn)
+- [Generate](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#Generate)
+- [Or](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#Or)
+- [OrDone](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#OrDone)
+- [Repeat](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#Repeat)
+- [RepeatFn](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#RepeatFn)
+- [Take](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#Take)
+- [Tee](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#Tee)
+  
+### 3. convertor转换器包支持一些常见的数据类型转换。
+
+```go
+import "github.com/duke-git/lancet/v2/convertor"
+```
+#### 函数列表:
+- [ColorHexToRGB](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ColorHexToRGB)
+- [ColorRGBToHex](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ColorRGBToHex)
+- [ToBool](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToBool)
+- [ToBytes](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToBytes)
+- [ToChar](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToChar)
+- [ToChannel](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToChannel)
+- [ToFloat](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToFloat)
+- [ToInt](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToInt)
+- [ToJson](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToJson)
+- [ToMap](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToMap)
+- [ToPointer](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToPointer)
+- [ToString](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToString)
+- [StructToMap](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#StructToMap)
+- [MapToSlice](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#MapToSlice)
+### 4. cryptor加密包支持数据加密和解密，获取md5，hash值。支持base64, md5, hmac, aes, des, rsa。
+
+```go
+import "github.com/duke-git/lancet/v2/cryptor"
 ```
 
 #### 函数列表:
+- [AesEcbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesEcbEncrypt)
+- [AesEcbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesEcbDecrypt)
+- [AesCbcEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCbcEncrypt)
+- [AesCbcDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCbcDecrypt)
+- [AesCtrCrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCtrCrypt)
+- [AesCfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCfbEncrypt)
+- [AesCfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCfbDecrypt)
+- [AesOfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesOfbEncrypt)
+- [AesOfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesOfbDecrypt)
+- [Base64StdEncode](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Base64StdEncode)
+- [Base64StdDecode](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Base64StdDecode)
+- [DesEcbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesEcbEncrypt)
+- [DesEcbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesEcbDecrypt)
+- [DesCbcEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCbcEncrypt)
+- [DesCbcDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCbcDecrypt)
+- [DesCtrCrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCtrCrypt)
+- [DesCfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCfbEncrypt)
+- [DesCfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCfbDecrypt)
+- [DesOfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesOfbEncrypt)
+- [DesOfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesOfbDecrypt)
+- [HmacMd5](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#HmacMd5)
+- [HmacSha1](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#HmacSha1)
+- [HmacSha256](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#HmacSha256)
+- [HmacSha512](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#HmacSha512)
+- [Md5String](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Md5String)
+- [Md5File](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Md5File)
+- [Sha1](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Sha1)
+- [Sha256](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Sha256)
+- [Sha512](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Sha512)
+- [GenerateRsaKey](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#GenerateRsaKey)
+- [RsaEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#RsaEncrypt)
+- [RsaDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#RsaDecrypt)
 
--   [ColorHexToRGB](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ColorHexToRGB)
--   [ColorRGBToHex](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ColorRGBToHex)
--   [ToBool](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToBool)
--   [ToBytes](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToBytes)
--   [ToChar](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToChar)
--   [ToChannel](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToChannel)
--   [ToInt](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToInt)
--   [ToJson](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToJson)
--   [ToString](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToString)
--   [StructToMap](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#StructToMap)
--   [MapToStruct](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#MapToStruct)
--   [EncodeByte](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#EncodeByte)
--   [DecodeByte](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#DecodeByte)
--   [DeepClone](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#DeepClone)
--   [CopyProperties](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#CopyProperties)
--   [ToInterface](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToInterface)
--   [Utf8ToGbk](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#Utf8ToGbk)
--   [GbkToUtf8](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#GbkToUtf8)
--   [ToStdBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToStdBase64)
--   [ToUrlBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToUrlBase64)
--   [ToRawStdBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToRawStdBase64)
--   [ToRawUrlBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToRawUrlBase64)
--   [ToBigInt](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToBigInt)
+### 5. datetime日期时间处理包，格式化日期，比较日期。
 
 
-### 3. cryptor 加密包支持数据加密和解密，获取 md5，hash 值。支持 base64, md5, hmac, aes, des, rsa。
-
 ```go
-import "github.com/duke-git/lancet/cryptor"
+import "github.com/duke-git/lancet/v2/datetime"
 ```
-
 #### 函数列表:
-
--   [AesEcbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#AesEcbEncrypt)
--   [AesEcbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#AesEcbDecrypt)
--   [AesCbcEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#AesCbcEncrypt)
--   [AesCbcDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#AesCbcDecrypt)
--   [AesCtrCrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#AesCtrCrypt)
--   [AesCfbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#AesCfbEncrypt)
--   [AesCfbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#AesCfbDecrypt)
--   [AesOfbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#AesOfbEncrypt)
--   [AesOfbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#AesOfbDecrypt)
--   [Base64StdEncode](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Base64StdEncode)
--   [Base64StdDecode](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Base64StdDecode)
--   [DesEcbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#DesEcbEncrypt)
--   [DesEcbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#DesEcbDecrypt)
--   [DesCbcEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#DesCbcEncrypt)
--   [DesCbcDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#DesCbcDecrypt)
--   [DesCtrCrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#DesCtrCrypt)
--   [DesCfbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#DesCfbEncrypt)
--   [DesCfbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#DesCfbDecrypt)
--   [DesOfbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#DesOfbEncrypt)
--   [DesOfbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#DesOfbDecrypt)
--   [HmacMd5](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#HmacMd5)
--   [HmacMd5WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#HmacMd5WithBase64)
-md#HmacSha256WithBase64)
--   [HmacSha1](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#HmacSha1)
--   [HmacSha1WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#HmacSha1WithBase64)
--   [HmacSha256](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#HmacSha256)
--   [HmacSha256WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#HmacSha256WithBase64)
--   [HmacSha512](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#HmacSha512)
--   [HmacSha512WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#HmacSha512WithBase64)
--   [Md5String](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Md5String)
--   [Md5StringWithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Md5StringWithBase64)
--   [Md5Byte](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Md5Byte)
--   [Md5ByteWithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Md5ByteWithBase64)
--   [Md5File](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Md5File)
--   [Sha1](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Sha1)
--   [Sha1WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Sha1WithBase64)
--   [Sha256](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Sha256)
--   [Sha256WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Sha256WithBase64)
--   [Sha512](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Sha512)
--   [Sha512WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Sha512WithBase64)
--   [GenerateRsaKey](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#GenerateRsaKey)
--   [RsaEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#RsaEncrypt)
--   [RsaDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#RsaDecrypt)
--   [GenerateRsaKeyPair](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#GenerateRsaKeyPair)
--   [RsaEncryptOAEP](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#RsaEncryptOAEP)
--   [RsaDecryptOAEP](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#RsaDecryptOAEP)
+- [AddDay](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#AddDay)
+- [AddHour](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#AddHour)
+- [AddMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#AddMinute)
+- [BeginOfMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfMinute)
+- [BeginOfHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfHour)
+- [BeginOfDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfDay)
+- [BeginOfWeek](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfWeek)
+- [BeginOfMonth](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfMonth)
+- [BeginOfYear](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfYear)
+- [EndOfMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfMinute)
+- [EndOfHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfHour)
+- [EndOfDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfDay)
+- [EndOfWeek](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfWeek)
+- [EndOfMonth](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfMonth)
+- [EndOfYear](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfYear)
+- [GetNowDate](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetNowDate)
+- [GetNowTime](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetNowTime)
+- [GetNowDateTime](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetNowDateTime)
+- [GetZeroHourTimestamp](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetZeroHourTimestamp)
+- [GetNightTimestamp](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetNightTimestamp)
+- [FormatTimeToStr](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#FormatTimeToStr)
+- [FormatStrToTime](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#FormatStrToTime)
+- [NewUnix](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#NewUnix)
+- [NewUnixNow](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#NewUnixNow)
+- [NewFormat](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#NewFormat)
+- [NewISO8601](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#NewISO8601)
+- [ToUnix](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#ToUnix)
+- [ToFormat](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#ToFormat)
+- [ToFormatForTpl](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#ToFormatForTpl)
+- [ToIso8601](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#ToIso8601)
 
 
-### 4. datetime 日期时间处理包，格式化日期，比较日期。
+### 6. datastructure包含一些普通的数据结构实现。例如：list, linklist, stack, queue, set, tree, graph.
+
 
 ```go
-import "github.com/duke-git/lancet/datetime"
+import list "github.com/duke-git/lancet/v2/datastructure/list"
+import link "github.com/duke-git/lancet/v2/datastructure/link"
+import stack "github.com/duke-git/lancet/v2/datastructure/stack"
+import queue "github.com/duke-git/lancet/v2/datastructure/queue"
+import set "github.com/duke-git/lancet/v2/datastructure/set"
+import tree "github.com/duke-git/lancet/v2/datastructure/tree"
+import heap "github.com/duke-git/lancet/v2/datastructure/heap"
 ```
+#### Function list:
+- [List](https://github.com/duke-git/lancet/blob/main/docs/datastructure/list_zh-CN.md)
+- [Linklist](https://github.com/duke-git/lancet/blob/main/docs/datastructure/linklist_zh-CN.md)
+- [Stack](https://github.com/duke-git/lancet/blob/main/docs/datastructure/stack_zh-CN.md)
+- [Queue](https://github.com/duke-git/lancet/blob/main/docs/datastructure/queue_zh-CN.md)
+- [Set](https://github.com/duke-git/lancet/blob/main/docs/datastructure/set_zh-CN.md)
+- [Tree](https://github.com/duke-git/lancet/blob/main/docs/datastructure/tree_zh-CN.md)
+- [Heap](https://github.com/duke-git/lancet/blob/main/docs/datastructure/heap.md)
 
-#### 函数列表:
 
--   [AddDay](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#AddDay)
--   [AddHour](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#AddHour)
--   [AddMinute](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#AddMinute)
--   [AddYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#AddYear)
--   [BeginOfMinute](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfMinute)
--   [BeginOfHour](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfHour)
--   [BeginOfDay](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfDay)
--   [BeginOfWeek](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfWeek)
--   [BeginOfMonth](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfMonth)
--   [BeginOfYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfYear)
--   [EndOfMinute](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfMinute)
--   [EndOfHour](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfHour)
--   [EndOfDay](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfDay)
--   [EndOfWeek](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfWeek)
--   [EndOfMonth](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfMonth)
--   [EndOfYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfYear)
--   [GetNowDate](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#GetNowDate)
--   [GetNowTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#GetNowTime)
--   [GetNowDateTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#GetNowDateTime)
--   [GetZeroHourTimestamp](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#GetZeroHourTimestamp)
--   [GetNightTimestamp](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#GetNightTimestamp)
--   [FormatTimeToStr](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#FormatTimeToStr)
--   [FormatStrToTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#FormatStrToTime)
--   [NewUnix](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#NewUnix)
--   [NewUnixNow](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#NewUnixNow)
--   [NewFormat](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#NewFormat)
--   [NewISO8601](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#NewISO8601)
--   [ToUnix](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#ToUnix)
--   [ToFormat](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#ToFormat)
--   [ToFormatForTpl](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#ToFormatForTpl)
--   [ToIso8601](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#ToIso8601)
--   [IsLeapYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#IsLeapYear)
--   [BetweenSeconds](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#BetweenSeconds)
--   [DayOfYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#DayOfYear)
--   [IsWeekend](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#IsWeekend)
--   [NowDateOrTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#NowDateOrTime)
--   [Timestamp](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#Timestamp)
--   [TimestampMilli](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#TimestampMilli)
--   [TimestampMicro](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#TimestampMicro)
--   [TimestampNano](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#TimestampNano)
--   [TrackFuncTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#TrackFuncTime)
--   [DaysBetween](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#DaysBetween)
--   [GenerateDatetimesBetween](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#GenerateDatetimesBetween)
-
-### 5. fileutil 包支持文件基本操作。
+### 7. fileutil包支持文件基本操作。
 
 ```go
-import "github.com/duke-git/lancet/fileutil"
+import "github.com/duke-git/lancet/v2/fileutil"
 ```
 
 #### 函数列表：
 
--   [ClearFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#ClearFile)
--   [CreateFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#CreateFile)
--   [CreateDir](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#CreateDir)
--   [CopyFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#CopyFile)
--   [FileMode](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#FileMode)
--   [MiMeType](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#MiMeType)
--   [IsExist](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#IsExist)
--   [IsLink](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#IsLink)
--   [IsDir](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#IsDir)
--   [ListFileNames](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#ListFileNames)
--   [RemoveFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#RemoveFile)
--   [ReadFileToString](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#ReadFileToString)
--   [ReadFileByLine](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#ReadFileByLine)
--   [Zip](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#Zip)
--   [ZipAppendEntry](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#ZipAppendEntry)
--   [UnZip](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#UnZip)
--   [CurrentPath](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#CurrentPath)
--   [IsZipFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#IsZipFile)
--   [FileSize](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#FileSize)
--   [MTime](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#MTime)
--   [Sha](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#Sha)
--   [ReadCsvFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#ReadCsvFile)
--   [WriteCsvFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#WriteCsvFile)
--   [WriteMapsToCsv](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#WriteMapsToCsv)
--   [WriteStringToFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#WriteStringToFile)
--   [WriteBytesToFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#WriteBytesToFile)
--   [ReadFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#ReadFile)
+- [ClearFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#ClearFile)
+- [CreateFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#CreateFile)
+- [CreateDir](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#CreateDir)
+- [CopyFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#CopyFile)
+- [FileMode](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#FileMode)
+- [MiMeType](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#MiMeType)
+- [IsExist](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#IsExist)
+- [IsLink](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#IsLink)
+- [IsDir](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#IsDir)
+- [ListFileNames](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#ListFileNames)
+- [RemoveFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#RemoveFile)
+- [ReadFileToString](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#ReadFileToString)
+- [ReadFileByLine](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#ReadFileByLine)
+- [Zip](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#Zip)
+- [UnZip](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#UnZip)
 
-### 6. formatter 格式化器包含一些数据格式化处理方法。
+### 8. formatter格式化器包含一些数据格式化处理方法。
 
 ```go
-import "github.com/duke-git/lancet/formatter"
+import "github.com/duke-git/lancet/v2/formatter"
+```
+#### 函数列表:
+- [Comma](https://github.com/duke-git/lancet/blob/main/docs/formatter_zh-CN.md#Comma)
+
+
+### 9. function函数包控制函数执行流程，包含部分函数式编程。
+
+```go
+import "github.com/duke-git/lancet/v2/function"
 ```
 
 #### 函数列表:
+- [After](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#After)
+- [Before](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Before)
+- [Curry](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Curry)
+- [Compose](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Compose)
+- [Debounced](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Debounced)
+- [Delay](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Delay)
+- [Watcher](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Watcher)
 
--   [Comma](https://github.com/duke-git/lancet/blob/v1/docs/formatter_zh-CN.md#Comma)
--   [Pretty](https://github.com/duke-git/lancet/blob/v1/docs/formatter_zh-CN.md#Pretty)
--   [PrettyToWriter](https://github.com/duke-git/lancet/blob/v1/docs/formatter_zh-CN.md#PrettyToWriter)
--   [DecimalBytes](https://github.com/duke-git/lancet/blob/v1/docs/formatter_zh-CN.md#DecimalBytes)
--   [BinaryBytes](https://github.com/duke-git/lancet/blob/v1/docs/formatter_zh-CN.md#BinaryBytes)
--   [ParseDecimalBytes](https://github.com/duke-git/lancet/blob/v1/docs/formatter_zh-CN.md#ParseDecimalBytes)
--   [ParseBinaryBytes](https://github.com/duke-git/lancet/blob/v1/docs/formatter_zh-CN.md#ParseBinaryBytes)
 
-### 7. function 函数包控制函数执行流程，包含部分函数式编程。
+### 10. maputil包包括一些操作map的函数.
 
 ```go
-import "github.com/duke-git/lancet/function"
+import "github.com/duke-git/lancet/v2/maputil"
 ```
 
 #### 函数列表:
+- [ForEach](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#ForEach)
+- [Filter](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#Filter)
+- [Intersect](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#Intersect)
+- [Keys](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#Keys)
+- [Merge](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#Merge)
+- [Minus](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#Minus)
+- [Values](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#Values)
+- [IsDisjoint](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#IsDisjoint)
 
--   [After](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#After)
--   [Before](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Before)
--   [Curry](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Curry)
--   [Compose](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Compose)
--   [Debounced](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Debounced)
--   [Debounce](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Debounce)
--   [Throttle](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Throttle)
--   [Delay](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Delay)
--   [Pipeline](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Pipeline)
--   [Schedule](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Schedule)
--   [Watcher](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Watcher)
-
-### 8. mathutil 包实现了一些数学计算的函数。
+### 11. mathutil包实现了一些数学计算的函数。
 
 ```go
-import "github.com/duke-git/lancet/mathutil"
+import "github.com/duke-git/lancet/v2/mathutil"
 ```
 
 #### Function list:
+- [Average](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Average)
+- [Exponent](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Exponent)
+- [Fibonacci](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Fibonacci)
+- [Factorial](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Factorial)
+- [Max](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Max)
+- [MaxBy](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#MaxBy)
+- [Min](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Min)
+- [MinBy](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#MinBy)
+- [Percent](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Percent)
+- [RoundToFloat](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#RoundToFloat)
+- [RoundToString](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#RoundToString)
+- [TruncRound](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#TruncRound)
 
--   [Exponent](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#Exponent)
--   [Fibonacci](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#Fibonacci)
--   [Factorial](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#Factorial)
--   [Percent](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#Percent)
--   [RoundToFloat](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#RoundToFloat)
--   [RoundToString](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#RoundToString)
--   [TruncRound](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#TruncRound)
--   [CeilToFloat](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#CeilToFloat)
--   [CeilToString](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#CeilToString)
--   [FloorToFloat](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#FloorToFloat)
--   [FloorToString](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#FloorToString)
--   [AngleToRadian](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#AngleToRadian)
--   [RadianToAngle](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#RadianToAngle)
--   [PointDistance](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#PointDistance)
--   [IsPrime](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#IsPrime)
--   [GCD](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#GCD)
--   [LCM](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#LCM)
--   [Cos](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#Cos)
--   [Sin](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#Sin)
--   [Log](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#Log)
-### 9. netutil 网络包支持获取 ip 地址，发送 http 请求。
+### 12. netutil网络包支持获取ip地址，发送http请求。
 
 ```go
-import "github.com/duke-git/lancet/netutil"
+import "github.com/duke-git/lancet/v2/netutil"
+```
+
+#### 函数列表:
+- [ConvertMapToQueryString](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#ConvertMapToQueryString)
+- [GetInternalIp](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#GetInternalIp)
+- [EncodeUrl](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#EncodeUrl)
+- [GetIps](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetIps)
+- [GetMacAddrs](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetMacAddrs)
+- [GetPublicIpInfo](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#GetPublicIpInfo)
+- [GetRequestPublicIp](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#GetRequestPublicIp)
+- [IsPublicIP](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#IsPublicIP)
+- [IsInternalIP](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#IsInternalIP)
+- [HttpGet](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpGet)
+- [HttpDelete](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpDelete)
+- [HttpPost](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpPost)
+- [HttpPut](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpPut)
+- [HttpPatch](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpPatch)
+- [ParseHttpResponse](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#ParseHttpResponse)
+
+### 13. random随机数生成器包，可以生成随机[]bytes, int, string。
+
+```go
+import "github.com/duke-git/lancet/v2/random"
+```
+
+#### 函数列表:
+- [RandBytes](https://github.com/duke-git/lancet/blob/main/docs/random_zh-CN.md#RandBytes)
+- [RandInt](https://github.com/duke-git/lancet/blob/main/docs/random_zh-CN.md#RandInt)
+- [RandString](https://github.com/duke-git/lancet/blob/main/docs/random_zh-CN.md#RandString)
+- [UUIdV4](https://github.com/duke-git/lancet/blob/main/docs/random.md#UUIdV4)
+### 14. retry重试执行函数直到函数运行成功或被context cancel。
+
+```go
+import "github.com/duke-git/lancet/v2/retry"
+```
+
+#### 函数列表:
+- [Context](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#Context)
+- [Retry](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#Retry)
+- [RetryFunc](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#RetryFunc)
+- [RetryDuration](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#RetryDuration)
+- [RetryTimes](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#RetryTimes)
+
+
+### 15. slice包包含操作切片的方法集合。
+
+```go
+import "github.com/duke-git/lancet/v2/slice"
+```
+
+#### 函数列表:
+- [AppendIfAbsent](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#AppendIfAbsent)
+- [Contain](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Contain)
+- [ContainSubSlice](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#ContainSubSlice)
+- [Chunk](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Chunk)
+- [Compact](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Compact)
+- [Concat](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Concat)
+- [Count](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Count)
+- [Difference](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Difference)
+- [DifferenceBy](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#DifferenceBy)
+- [DifferenceWith](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DifferenceWith)
+- [DeleteAt](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#DeleteAt)
+- [Drop](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Drop)
+- [Every](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Every)
+- [Filter](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Filter)
+- [Find](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Find)
+- [FindLast](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#FindLast)
+- [Flatten](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Flatten)
+- [FlattenDeep](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#FlattenDeep)
+- [ForEach](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#ForEach)
+- [GroupBy](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#GroupBy)
+- [GroupWith](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#GroupWith)
+- [IntSlice](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#IntSlice)
+- [InterfaceSlice](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#InterfaceSlice)
+- [Intersection](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Intersection)
+- [InsertAt](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#InsertAt)
+- [IndexOf](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#IndexOf)
+- [LastIndexOf](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#LastIndexOf)
+- [Map](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Map)
+- [Reverse](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Reverse)
+- [Reduce](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Reduce)
+- [Shuffle](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Shuffle)
+- [SortByField](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#SortByField)
+- [Some](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Some)
+- [StringSlice](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#StringSlice)
+- [SymmetricDifference](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#SymmetricDifference)
+- [ToSlice](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#ToSlice)
+- [ToSlicePointer](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#ToSlicePointer)
+- [Unique](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Unique)
+- [UniqueBy](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#UniqueBy)
+- [Union](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Union)
+- [UpdateAt](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#UpdateAt)
+- [Without](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Without)
+
+
+### 16. strutil包含处理字符串的相关函数。
+
+```go
+import "github.com/duke-git/lancet/v2/strutil"
 ```
 
 #### 函数列表:
 
--   [ConvertMapToQueryString](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#ConvertMapToQueryString)
--   [EncodeUrl](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#EncodeUrl)
--   [GetInternalIp](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#GetInternalIp)
--   [GetIps](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#GetIps)
--   [GetMacAddrs](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#GetMacAddrs)
--   [GetPublicIpInfo](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#GetPublicIpInfo)
--   [GetRequestPublicIp](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#GetRequestPublicIp)
--   [IsPublicIP](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#IsPublicIP)
--   [IsInternalIP](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#IsInternalIP)
--   [HttpGet](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#HttpGet)
--   [HttpDelete](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#HttpDelete)
--   [HttpPost](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#HttpPost)
--   [HttpPut](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#HttpPut)
--   [HttpPatch](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#HttpPatch)
--   [ParseHttpResponse](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#ParseHttpResponse)
--   [UploadFile](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#UploadFile)
--   [DownloadFile](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#DownloadFile)
--   [IsPingConnected](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#IsPingConnected)
--   [IsTelnetConnected](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#IsTelnetConnected)
+- [After](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#After)
+- [AfterLast](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#AfterLast)
+- [Before](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#Before)
+- [BeforeLast](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#BeforeLast)
+- [CamelCase](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#CamelCase)
+- [Capitalize](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#Capitalize)
+- [IsString](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#IsString)
+- [KebabCase](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#KebabCase)
+- [LowerFirst](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#LowerFirst)
+- [UpperFirst](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#UpperFirst)
+- [PadEnd](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#PadEnd)
+- [PadStart](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#PadStart)
+- [Reverse](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#Reverse)
+- [SnakeCase](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#SnakeCase)
+- [SplitEx](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#SplitEx)
+- [Wrap](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#Wrap)
+- [Unwrap](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#Unwrap)
+  
 
-### 10. random 随机数生成器包，可以生成随机[]bytes, int, string。
+### 17. system包含os, runtime, shell command相关函数。
 
 ```go
-import "github.com/duke-git/lancet/random"
+import "github.com/duke-git/lancet/v2/system"
 ```
 
 #### 函数列表:
+- [IsWindows](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#IsWindows)
+- [IsLinux](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#IsLinux)
+- [IsMac](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#IsMac)
+- [GetOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#GetOsEnv)
+- [SetOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#SetOsEnv)
+- [RemoveOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#RemoveOsEnv)
+- [CompareOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#CompareOsEnv)
+- [ExecCommand](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#ExecCommand)
+- [GetOsBits](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#GetOsBits)
 
--   [RandBool](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandBool)
--   [RandBoolSlice](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandBoolSlice)
--   [RandBytes](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandBytes)
--   [RandInt](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandInt)
--   [RandIntSlice](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandIntSlice)
--   [RandString](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandString)
--   [RandStringSlice](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandStringSlice)
--   [RandFloat](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandFloat)
--   [RandFloats](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandFloats)
--   [RandUpper](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandUpper)
--   [RandLower](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandLower)
--   [RandNumeral](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandNumeral)
--   [RandNumeralOrLetter](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandNumeralOrLetter)
--   [UUIdV4](https://github.com/duke-git/lancet/blob/v1/docs/random.md#UUIdV4)
--   [RandUniqueIntSlice](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandUniqueIntSlice)
-
-### 11. retry 重试执行函数直到函数运行成功或被 context cancel。
+### 18. validator验证器包，包含常用字符串格式验证函数。
 
 ```go
-import "github.com/duke-git/lancet/retry"
+import "github.com/duke-git/lancet/v2/validator"
 ```
-
 #### 函数列表:
 
--   [Context](https://github.com/duke-git/lancet/blob/v1/docs/retry_zh-CN.md#Context)
--   [Retry](https://github.com/duke-git/lancet/blob/v1/docs/retry_zh-CN.md#Retry)
--   [RetryFunc](https://github.com/duke-git/lancet/blob/v1/docs/retry_zh-CN.md#RetryFunc)
--   [RetryDuration](https://github.com/duke-git/lancet/blob/v1/docs/retry_zh-CN.md#RetryDuration)
--   [RetryTimes](https://github.com/duke-git/lancet/blob/v1/docs/retry_zh-CN.md#RetryTimes)
+- [ContainChinese](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#ContainChinese)
+- [ContainLetter](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#ContainLetter)
+- [ContainLower](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#ContainLower)
+- [ContainUpper](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#ContainUpper)
+- [IsAlpha](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsAlpha)
+- [IsAllUpper](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsAllUpper)
+- [IsAllLower](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsAllLower)
+- [IsBase64](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsBase64)
+- [IsChineseMobile](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsChineseMobile)
+- [IsChineseIdNum](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsChineseIdNum)
+- [IsChinesePhone](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsChinesePhone)
+- [IsCreditCard](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsCreditCard)
+- [IsDns](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsDns)
+- [IsEmail](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsEmail)
+- [IsEmptyString](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsEmptyString)
+- [IsFloatStr](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsFloatStr)
+- [IsNumberStr](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsNumberStr)
+- [IsJSON](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsJSON)
+- [IsRegexMatch](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsRegexMatch)
+- [IsIntStr](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsIntStr)
+- [IsIp](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsIp)
+- [IsIpV4](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsIpV4)
+- [IsIpV6](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsIpV6)
+- [IsStrongPassword](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsStrongPassword)
+- [IsUrl](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsUrl)
+- [IsWeakPassword](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsWeakPassword)
 
-### 12. slice 包包含操作切片的方法集合。
+### 19. xerror包实现一些错误处理函数
 
 ```go
-import "github.com/duke-git/lancet/slice"
+import "github.com/duke-git/lancet/v2/xerror"
 ```
-
 #### 函数列表:
-
--   [AppendIfAbsent](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#AppendIfAbsent)
--   [Contain](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Contain)
--   [ContainSubSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#ContainSubSlice)
--   [Chunk](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Chunk)
--   [Compact](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Compact)
--   [Concat](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Concat)
--   [Count](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Count)
--   [Difference](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Difference)
--   [DifferenceBy](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#DifferenceBy)
--   [DeleteByIndex](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#DeleteByIndex)
--   [Drop](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Drop)
--   [Every](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Every)
--   [Equal](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Equal)
--   [EqualWith](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#EqualWith)
--   [Filter](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Filter)
--   [Find](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Find)
--   [FindLast](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#FindLast)
--   [FlattenDeep](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#FlattenDeep)
--   [ForEach](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#ForEach)
--   [GroupBy](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#GroupBy)
--   [IntSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#IntSlice)
--   [IndexOf](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#IndexOf)
--   [LastIndexOf](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#LastIndexOf)
--   [InterfaceSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#InterfaceSlice)
--   [Intersection](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Intersection)
--   [InsertByIndex](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#InsertByIndex)
--   [Map](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Map)
--   [ReverseSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#ReverseSlice)
--   [Reduce](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Reduce)
--   [Shuffle](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Shuffle)
--   [SortByField](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#SortByField)
--   [Some](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Some)
--   [StringSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#StringSlice)
--   [ToSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#ToSlice)
--   [ToSlicePointer](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#ToSlice)
--   [Unique](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Unique)
--   [UniqueBy](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#UniqueBy)
--   [Union](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Union)
--   [UpdateByIndex](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#UpdateByIndex)
--   [Without](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Without)
--   [Join](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Join)
-
-### 13. strutil 包含处理字符串的相关函数。
-
-```go
-import "github.com/duke-git/lancet/strutil"
-```
-
-#### 函数列表:
-
--   [After](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#After)
--   [AfterLast](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#AfterLast)
--   [Before](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Before)
--   [BeforeLast](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#BeforeLast)
--   [CamelCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#CamelCase)
--   [Capitalize](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Capitalize)
--   [ContainsAll](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#ContainsAll)
--   [ContainsAny](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#ContainsAny)
--   [IsString](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#IsString)
--   [KebabCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#KebabCase)
--   [UpperKebabCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#UpperKebabCase)
--   [LowerFirst](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#LowerFirst)
--   [UpperFirst](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#UpperFirst)
--   [Pad](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Pad)
--   [PadEnd](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#PadEnd)
--   [PadStart](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#PadStart)
--   [Reverse](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Reverse)
--   [SnakeCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#SnakeCase)
--   [UpperSnakeCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#UpperSnakeCase)
--   [SplitEx](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#SplitEx)
--   [Wrap](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Wrap)
--   [Unwrap](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Unwrap)
--   [SplitWords](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#SplitWords)
--   [WordCount](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#WordCount)
--   [RemoveNonPrintable](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#RemoveNonPrintable)
--   [StringToBytes](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#StringToBytes)
--   [BytesToString](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#BytesToString)
--   [IsBlank](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#IsBlank)
--   [HasPrefixAny](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#HasPrefixAny)
--   [HasSuffixAny](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#HasSuffixAny)
--   [IndexOffset](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#IndexOffset)
--   [ReplaceWithMap](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#ReplaceWithMap)
--   [Trim](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Trim)
--   [SplitAndTrim](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#SplitAndTrim)
--   [HideString](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#HideString)
--   [RemoveWhiteSpace](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#RemoveWhiteSpace)
--   [SubInBetween](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#SubInBetween)
--   [HammingDistance](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#HammingDistance)
--   [Concat](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Concat)
--   [Ellipsis](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Ellipsis)
--   [Shuffle](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Shuffle)
--   [Rotate](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Rotate)
--   [TemplateReplace](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#TemplateReplace)
--   [RegexMatchAllGroups](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#RegexMatchAllGroups)
--   [Cut](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Cut)
-
-### 14. system 包含 os, runtime, shell command 相关函数。
-
-```go
-import "github.com/duke-git/lancet/system"
-```
-
-#### 函数列表:
-
--   [IsWindows](https://github.com/duke-git/lancet/blob/v1/docs/system_zh-CN.md#IsWindows)
--   [IsLinux](https://github.com/duke-git/lancet/blob/v1/docs/system_zh-CN.md#IsLinux)
--   [IsMac](https://github.com/duke-git/lancet/blob/v1/docs/system_zh-CN.md#IsMac)
--   [GetOsEnv](https://github.com/duke-git/lancet/blob/v1/docs/system_zh-CN.md#GetOsEnv)
--   [SetOsEnv](https://github.com/duke-git/lancet/blob/v1/docs/system_zh-CN.md#SetOsEnv)
--   [RemoveOsEnv](https://github.com/duke-git/lancet/blob/v1/docs/system_zh-CN.md#RemoveOsEnv)
--   [CompareOsEnv](https://github.com/duke-git/lancet/blob/v1/docs/system_zh-CN.md#CompareOsEnv)
--   [ExecCommand](https://github.com/duke-git/lancet/blob/v1/docs/system_zh-CN.md#ExecCommand)
--   [GetOsBits](https://github.com/duke-git/lancet/blob/v1/docs/system_zh-CN.md#GetOsBits)
-
-### 15. validator 验证器包，包含常用字符串格式验证函数。
-
-```go
-import "github.com/duke-git/lancet/validator"
-```
-
-#### 函数列表:
-
--   [ContainChinese](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#ContainChinese)
--   [ContainLetter](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#ContainLetter)
--   [ContainLower](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#ContainLower)
--   [ContainUpper](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#ContainUpper)
--   [IsAlpha](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsAlpha)
--   [IsAllUpper](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsAllUpper)
--   [IsAllLower](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsAllLower)
--   [IsBase64](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsBase64)
--   [IsChineseMobile](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsChineseMobile)
--   [IsChineseIdNum](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsChineseIdNum)
--   [IsChinesePhone](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsChinesePhone)
--   [IsCreditCard](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsCreditCard)
--   [IsDns](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsDns)
--   [IsEmail](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsEmail)
--   [IsEmptyString](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsEmptyString)
--   [IsInt](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsInt)
--   [IsFloat](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsFloat)
--   [IsNumber](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsNumber)
--   [IsIntStr](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsIntStr)
--   [IsFloatStr](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsFloatStr)
--   [IsNumberStr](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsNumberStr)
--   [IsJSON](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsJSON)
--   [IsRegexMatch](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsRegexMatch)
--   [IsIp](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsIp)
--   [IsIpV4](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsIpV4)
--   [IsIpV6](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsIpV6)
--   [IsStrongPassword](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsStrongPassword)
--   [IsUrl](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsUrl)
--   [IsWeakPassword](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsWeakPassword)
--   [IsZeroValue](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsZeroValue)
--   [IsGBK](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsGBK)
--   [IsASCII](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsASCII)
--   [IsPrintable](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsPrintable)
--   [IsBin](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsBin)
--   [IsHex](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsHex)
--   [IsBase64URL](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsBase64URL)
--   [IsJWT](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsJWT)
--   [IsVisa](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsVisa)
--   [IsMasterCard](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsMasterCard)
--   [IsAmericanExpress](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsAmericanExpress)
--   [IsUnionPay](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsUnionPay)
--   [IsChinaUnionPay](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsChinaUnionPay)
+- [Unwrap](https://github.com/duke-git/lancet/blob/main/docs/xerror_zh-CN.md#Unwrap)
 
 ## 如何贡献代码
 
-非常感激任何的代码提交以使 lancet 的功能越来越强大。创建 pull request 时请遵守以下规则。
+非常感激任何的代码提交以使lancet的功能越来越强大。创建pull request时请遵守以下规则。
 
-1. Fork lancet 仓库。
+1. Fork lancet仓库。
 2. 创建自己的特性分支。
 3. 提交变更。
-4. Push 分支。
-5. 创建新的 pull request。
+4. Push分支。
+5. 创建新的pull request。

algorithm/lru_cache.go

@@ -0,0 +1,102 @@
+package algorithm
+
+type lruNode[K comparable, V any] struct {
+	key   K
+	value V
+	pre   *lruNode[K, V]
+	next  *lruNode[K, V]
+}
+
+// newLruNode return a lruNode pointer
+func newLruNode[K comparable, V any](key K, value V) *lruNode[K, V] {
+	return &lruNode[K, V]{
+		key:   key,
+		value: value,
+		pre:   nil,
+		next:  nil,
+	}
+}
+
+// LRUCache lru cache (thread unsafe)
+type LRUCache[K comparable, V any] struct {
+	cache    map[K]*lruNode[K, V]
+	head     *lruNode[K, V]
+	tail     *lruNode[K, V]
+	capacity int
+	length   int
+}
+
+// NewLRUCache return a LRUCache pointer
+func NewLRUCache[K comparable, V any](capacity int) *LRUCache[K, V] {
+	return &LRUCache[K, V]{
+		cache:    make(map[K]*lruNode[K, V], capacity),
+		head:     nil,
+		tail:     nil,
+		capacity: capacity,
+		length:   0,
+	}
+}
+
+// Get value of key from lru cache
+func (l *LRUCache[K, V]) Get(key K) (V, bool) {
+	var value V
+
+	node, ok := l.cache[key]
+	if ok {
+		l.moveToHead(node)
+		return node.value, true
+	}
+
+	return value, false
+}
+
+// Put value of key into lru cache
+func (l *LRUCache[K, V]) Put(key K, value V) {
+	node, ok := l.cache[key]
+	if !ok {
+		newNode := newLruNode(key, value)
+		l.cache[key] = newNode
+		l.addNode(newNode)
+
+		if len(l.cache) > l.capacity {
+			oldKey := l.deleteNode(l.head)
+			delete(l.cache, oldKey)
+		}
+	} else {
+		node.value = value
+		l.moveToHead(node)
+	}
+	l.length = len(l.cache)
+}
+
+func (l *LRUCache[K, V]) addNode(node *lruNode[K, V]) {
+	if l.tail != nil {
+		l.tail.next = node
+		node.pre = l.tail
+		node.next = nil
+	}
+	l.tail = node
+	if l.head == nil {
+		l.head = node
+	}
+}
+
+func (l *LRUCache[K, V]) deleteNode(node *lruNode[K, V]) K {
+	if node == l.tail {
+		l.tail = l.tail.pre
+	} else if node == l.head {
+		l.head = l.head.next
+	} else {
+		node.pre.next = node.next
+		node.next.pre = node.pre
+	}
+	return node.key
+}
+
+func (l *LRUCache[K, V]) moveToHead(node *lruNode[K, V]) {
+	if l.tail == node {
+		return
+	}
+	l.deleteNode(node)
+	l.addNode(node)
+}

algorithm/lru_cache_test.go

@@ -0,0 +1,36 @@
+package algorithm
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestLRUCache(t *testing.T) {
+	asssert := internal.NewAssert(t, "TestLRUCache")
+
+	cache := NewLRUCache[int, int](2)
+
+	cache.Put(1, 1)
+	cache.Put(2, 2)
+
+	_, ok := cache.Get(0)
+	asssert.Equal(false, ok)
+
+	v, ok := cache.Get(1)
+	asssert.Equal(true, ok)
+	asssert.Equal(1, v)
+
+	v, ok = cache.Get(2)
+	asssert.Equal(true, ok)
+	asssert.Equal(2, v)
+
+	cache.Put(3, 3)
+	v, ok = cache.Get(1)
+	asssert.Equal(false, ok)
+	asssert.NotEqual(1, v)
+
+	v, ok = cache.Get(3)
+	asssert.Equal(true, ok)
+	asssert.Equal(3, v)
+}

algorithm/search.go

@@ -0,0 +1,63 @@
+// Copyright 2021 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package algorithm contain some basic algorithm functions. eg. sort, search, list, linklist, stack, queue, tree, graph. TODO
+package algorithm
+
+import "github.com/duke-git/lancet/v2/lancetconstraints"
+
+// Search algorithms see https://github.com/TheAlgorithms/Go/tree/master/search
+
+// LinearSearch Simple linear search algorithm that iterates over all elements of an slice
+// If a target is found, the index of the target is returned. Else the function return -1
+func LinearSearch[T any](slice []T, target T, comparator lancetconstraints.Comparator) int {
+	for i, v := range slice {
+		if comparator.Compare(v, target) == 0 {
+			return i
+		}
+	}
+	return -1
+}
+
+// BinarySearch search for target within a sorted slice, recursive call itself.
+// If a target is found, the index of the target is returned. Else the function return -1
+func BinarySearch[T any](sortedSlice []T, target T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) int {
+	if highIndex < lowIndex || len(sortedSlice) == 0 {
+		return -1
+	}
+
+	midIndex := int(lowIndex + (highIndex-lowIndex)/2)
+	isMidValGreatTarget := comparator.Compare(sortedSlice[midIndex], target) == 1
+	isMidValLessTarget := comparator.Compare(sortedSlice[midIndex], target) == -1
+
+	if isMidValGreatTarget {
+		return BinarySearch(sortedSlice, target, lowIndex, midIndex-1, comparator)
+	} else if isMidValLessTarget {
+		return BinarySearch(sortedSlice, target, midIndex+1, highIndex, comparator)
+	}
+
+	return midIndex
+}
+
+// BinaryIterativeSearch search for target within a sorted slice.
+// If a target is found, the index of the target is returned. Else the function return -1
+func BinaryIterativeSearch[T any](sortedSlice []T, target T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) int {
+	startIndex := lowIndex
+	endIndex := highIndex
+
+	var midIndex int
+	for startIndex <= endIndex {
+		midIndex = int(startIndex + (endIndex-startIndex)/2)
+		isMidValGreatTarget := comparator.Compare(sortedSlice[midIndex], target) == 1
+		isMidValLessTarget := comparator.Compare(sortedSlice[midIndex], target) == -1
+
+		if isMidValGreatTarget {
+			endIndex = midIndex - 1
+		} else if isMidValLessTarget {
+			startIndex = midIndex + 1
+		} else {
+			return midIndex
+		}
+	}
+	return -1
+}

algorithm/search_test.go

@@ -0,0 +1,33 @@
+package algorithm
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+var sortedNumbers = []int{1, 2, 3, 4, 5, 6, 7, 8}
+
+func TestLinearSearch(t *testing.T) {
+	asssert := internal.NewAssert(t, "TestLinearSearch")
+
+	comparator := &intComparator{}
+	asssert.Equal(4, LinearSearch(sortedNumbers, 5, comparator))
+	asssert.Equal(-1, LinearSearch(sortedNumbers, 9, comparator))
+}
+
+func TestBinarySearch(t *testing.T) {
+	asssert := internal.NewAssert(t, "TestBinarySearch")
+
+	comparator := &intComparator{}
+	asssert.Equal(4, BinarySearch(sortedNumbers, 5, 0, len(sortedNumbers)-1, comparator))
+	asssert.Equal(-1, BinarySearch(sortedNumbers, 9, 0, len(sortedNumbers)-1, comparator))
+}
+
+func TestBinaryIterativeSearch(t *testing.T) {
+	asssert := internal.NewAssert(t, "TestBinaryIterativeSearch")
+
+	comparator := &intComparator{}
+	asssert.Equal(4, BinaryIterativeSearch(sortedNumbers, 5, 0, len(sortedNumbers)-1, comparator))
+	asssert.Equal(-1, BinaryIterativeSearch(sortedNumbers, 9, 0, len(sortedNumbers)-1, comparator))
+}

algorithm/sort.go

@@ -0,0 +1,192 @@
+// Copyright 2021 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package algorithm contain some basic algorithm functions. eg. sort, search
+package algorithm
+
+import "github.com/duke-git/lancet/v2/lancetconstraints"
+
+// BubbleSort use bubble to sort slice.
+func BubbleSort[T any](slice []T, comparator lancetconstraints.Comparator) {
+	for i := 0; i < len(slice); i++ {
+		for j := 0; j < len(slice)-1-i; j++ {
+			isCurrGreatThanNext := comparator.Compare(slice[j], slice[j+1]) == 1
+			if isCurrGreatThanNext {
+				swap(slice, j, j+1)
+			}
+		}
+	}
+}
+
+// InsertionSort use insertion to sort slice.
+func InsertionSort[T any](slice []T, comparator lancetconstraints.Comparator) {
+	for i := 0; i < len(slice); i++ {
+		for j := i; j > 0; j-- {
+			isPreLessThanCurrent := comparator.Compare(slice[j], slice[j-1]) == -1
+			if isPreLessThanCurrent {
+				swap(slice, j, j-1)
+			} else {
+				break
+			}
+		}
+	}
+}
+
+// SelectionSort use selection to sort slice.
+func SelectionSort[T any](slice []T, comparator lancetconstraints.Comparator) {
+	for i := 0; i < len(slice); i++ {
+		min := i
+		for j := i + 1; j < len(slice); j++ {
+			if comparator.Compare(slice[j], slice[min]) == -1 {
+				min = j
+			}
+		}
+		swap(slice, i, min)
+	}
+}
+
+// ShellSort shell sort slice.
+func ShellSort[T any](slice []T, comparator lancetconstraints.Comparator) {
+	size := len(slice)
+
+	gap := 1
+	for gap < size/3 {
+		gap = 3*gap + 1
+	}
+
+	for gap >= 1 {
+		for i := gap; i < size; i++ {
+			for j := i; j >= gap && comparator.Compare(slice[j], slice[j-gap]) == -1; j -= gap {
+				swap(slice, j, j-gap)
+			}
+		}
+		gap = gap / 3
+	}
+}
+
+// QuickSort quick sorting for slice, lowIndex is 0 and highIndex is len(slice)-1
+func QuickSort[T any](slice []T, comparator lancetconstraints.Comparator) {
+	quickSort(slice, 0, len(slice)-1, comparator)
+}
+
+func quickSort[T any](slice []T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) {
+	if lowIndex < highIndex {
+		p := partition(slice, lowIndex, highIndex, comparator)
+		quickSort(slice, lowIndex, p-1, comparator)
+		quickSort(slice, p+1, highIndex, comparator)
+	}
+}
+
+// partition split slice into two parts
+func partition[T any](slice []T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) int {
+	p := slice[highIndex]
+	i := lowIndex
+	for j := lowIndex; j < highIndex; j++ {
+		if comparator.Compare(slice[j], p) == -1 { //slice[j] < p
+			swap(slice, i, j)
+			i++
+		}
+	}
+
+	swap(slice, i, highIndex)
+
+	return i
+}
+
+// HeapSort use heap to sort slice
+func HeapSort[T any](slice []T, comparator lancetconstraints.Comparator) {
+	size := len(slice)
+
+	for i := size/2 - 1; i >= 0; i-- {
+		sift(slice, i, size-1, comparator)
+	}
+	for j := size - 1; j > 0; j-- {
+		swap(slice, 0, j)
+		sift(slice, 0, j-1, comparator)
+	}
+}
+
+func sift[T any](slice []T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) {
+	i := lowIndex
+	j := 2*i + 1
+
+	temp := slice[i]
+	for j <= highIndex {
+		if j < highIndex && comparator.Compare(slice[j], slice[j+1]) == -1 { //slice[j] < slice[j+1]
+			j++
+		}
+		if comparator.Compare(temp, slice[j]) == -1 { //tmp < slice[j]
+			slice[i] = slice[j]
+			i = j
+			j = 2*i + 1
+		} else {
+			break
+		}
+	}
+	slice[i] = temp
+}
+
+// MergeSort merge sorting for slice
+func MergeSort[T any](slice []T, comparator lancetconstraints.Comparator) {
+	mergeSort(slice, 0, len(slice)-1, comparator)
+}
+
+func mergeSort[T any](slice []T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) {
+	if lowIndex < highIndex {
+		mid := (lowIndex + highIndex) / 2
+		mergeSort(slice, lowIndex, mid, comparator)
+		mergeSort(slice, mid+1, highIndex, comparator)
+		merge(slice, lowIndex, mid, highIndex, comparator)
+	}
+}
+
+func merge[T any](slice []T, lowIndex, midIndex, highIndex int, comparator lancetconstraints.Comparator) {
+	i := lowIndex
+	j := midIndex + 1
+	temp := []T{}
+
+	for i <= midIndex && j <= highIndex {
+		//slice[i] < slice[j]
+		if comparator.Compare(slice[i], slice[j]) == -1 {
+			temp = append(temp, slice[i])
+			i++
+		} else {
+			temp = append(temp, slice[j])
+			j++
+		}
+	}
+
+	if i <= midIndex {
+		temp = append(temp, slice[i:midIndex+1]...)
+	} else {
+		temp = append(temp, slice[j:highIndex+1]...)
+	}
+
+	for k := 0; k < len(temp); k++ {
+		slice[lowIndex+k] = temp[k]
+	}
+}
+
+// CountSort use count sorting for slice
+func CountSort[T any](slice []T, comparator lancetconstraints.Comparator) []T {
+	size := len(slice)
+	out := make([]T, size)
+
+	for i := 0; i < size; i++ {
+		count := 0
+		for j := 0; j < size; j++ {
+			//slice[i] > slice[j]
+			if comparator.Compare(slice[i], slice[j]) == 1 {
+				count++
+			}
+		}
+		out[count] = slice[i]
+	}
+
+	return out
+}
+
+// swap two slice value at index i and j
+func swap[T any](slice []T, i, j int) {
+	slice[i], slice[j] = slice[j], slice[i]
+}

algorithm/sort_test.go

@@ -0,0 +1,208 @@
+package algorithm
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+// People test mock data
+type people struct {
+	Name string
+	Age  int
+}
+
+// PeopleAageComparator sort people slice by age field
+type peopleAgeComparator struct{}
+
+// Compare implements github.com/duke-git/lancet/v2/lancetconstraints/constraints.go/Comparator
+func (pc *peopleAgeComparator) Compare(v1 any, v2 any) int {
+	p1, _ := v1.(people)
+	p2, _ := v2.(people)
+
+	//ascending order
+	if p1.Age < p2.Age {
+		return -1
+	} else if p1.Age > p2.Age {
+		return 1
+	}
+	return 0
+}
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1 any, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	//ascending order
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func TestBubbleSortForStructSlice(t *testing.T) {
+	asssert := internal.NewAssert(t, "TestBubbleSortForStructSlice")
+
+	peoples := []people{
+		{Name: "a", Age: 20},
+		{Name: "b", Age: 10},
+		{Name: "c", Age: 17},
+		{Name: "d", Age: 8},
+		{Name: "e", Age: 28},
+	}
+	comparator := &peopleAgeComparator{}
+	BubbleSort(peoples, comparator)
+
+	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
+	actual := fmt.Sprintf("%v", peoples)
+
+	asssert.Equal(expected, actual)
+}
+
+func TestBubbleSortForIntSlice(t *testing.T) {
+	asssert := internal.NewAssert(t, "TestBubbleSortForIntSlice")
+	numbers := []int{2, 1, 5, 3, 6, 4}
+	comparator := &intComparator{}
+	BubbleSort(numbers, comparator)
+
+	asssert.Equal([]int{1, 2, 3, 4, 5, 6}, numbers)
+}
+
+func TestInsertionSort(t *testing.T) {
+	asssert := internal.NewAssert(t, "TestInsertionSort")
+
+	peoples := []people{
+		{Name: "a", Age: 20},
+		{Name: "b", Age: 10},
+		{Name: "c", Age: 17},
+		{Name: "d", Age: 8},
+		{Name: "e", Age: 28},
+	}
+	comparator := &peopleAgeComparator{}
+	InsertionSort(peoples, comparator)
+
+	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
+	actual := fmt.Sprintf("%v", peoples)
+
+	asssert.Equal(expected, actual)
+}
+
+func TestSelectionSort(t *testing.T) {
+	asssert := internal.NewAssert(t, "TestSelectionSort")
+
+	peoples := []people{
+		{Name: "a", Age: 20},
+		{Name: "b", Age: 10},
+		{Name: "c", Age: 17},
+		{Name: "d", Age: 8},
+		{Name: "e", Age: 28},
+	}
+	comparator := &peopleAgeComparator{}
+	SelectionSort(peoples, comparator)
+
+	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
+	actual := fmt.Sprintf("%v", peoples)
+
+	asssert.Equal(expected, actual)
+}
+
+func TestShellSort(t *testing.T) {
+	asssert := internal.NewAssert(t, "TestShellSort")
+
+	peoples := []people{
+		{Name: "a", Age: 20},
+		{Name: "b", Age: 10},
+		{Name: "c", Age: 17},
+		{Name: "d", Age: 8},
+		{Name: "e", Age: 28},
+	}
+	comparator := &peopleAgeComparator{}
+	ShellSort(peoples, comparator)
+
+	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
+	actual := fmt.Sprintf("%v", peoples)
+
+	asssert.Equal(expected, actual)
+}
+
+func TestQuickSort(t *testing.T) {
+	asssert := internal.NewAssert(t, "TestQuickSort")
+
+	peoples := []people{
+		{Name: "a", Age: 20},
+		{Name: "b", Age: 10},
+		{Name: "c", Age: 17},
+		{Name: "d", Age: 8},
+		{Name: "e", Age: 28},
+	}
+	comparator := &peopleAgeComparator{}
+	QuickSort(peoples, comparator)
+
+	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
+	actual := fmt.Sprintf("%v", peoples)
+
+	asssert.Equal(expected, actual)
+}
+
+func TestHeapSort(t *testing.T) {
+	asssert := internal.NewAssert(t, "TestHeapSort")
+
+	peoples := []people{
+		{Name: "a", Age: 20},
+		{Name: "b", Age: 10},
+		{Name: "c", Age: 17},
+		{Name: "d", Age: 8},
+		{Name: "e", Age: 28},
+	}
+	comparator := &peopleAgeComparator{}
+	HeapSort(peoples, comparator)
+
+	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
+	actual := fmt.Sprintf("%v", peoples)
+
+	asssert.Equal(expected, actual)
+}
+
+func TestMergeSort(t *testing.T) {
+	asssert := internal.NewAssert(t, "TestMergeSort")
+
+	peoples := []people{
+		{Name: "a", Age: 20},
+		{Name: "b", Age: 10},
+		{Name: "c", Age: 17},
+		{Name: "d", Age: 8},
+		{Name: "e", Age: 28},
+	}
+	comparator := &peopleAgeComparator{}
+	MergeSort(peoples, comparator)
+
+	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
+	actual := fmt.Sprintf("%v", peoples)
+
+	asssert.Equal(expected, actual)
+}
+
+func TestCountSort(t *testing.T) {
+	asssert := internal.NewAssert(t, "TestCountSort")
+
+	peoples := []people{
+		{Name: "a", Age: 20},
+		{Name: "b", Age: 10},
+		{Name: "c", Age: 17},
+		{Name: "d", Age: 8},
+		{Name: "e", Age: 28},
+	}
+	comparator := &peopleAgeComparator{}
+	sortedPeopleByAge := CountSort(peoples, comparator)
+	t.Log(sortedPeopleByAge)
+
+	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
+	actual := fmt.Sprintf("%v", sortedPeopleByAge)
+
+	asssert.Equal(expected, actual)
+}

compare/compare.go

@@ -1,58 +0,0 @@
-// Copyright 2023 dudaodong@gmail.com. All rights resulterved.
-// Use of this source code is governed by MIT license
-
-// Package compare provides a lightweight comparison function on interface{} type.
-// reference: https://github.com/stretchr/testify
-package compare
-
-import (
-	"reflect"
-	"time"
-
-	"github.com/duke-git/lancet/convertor"
-)
-
-// operator type
-const (
-	equal          = "eq"
-	lessThan       = "lt"
-	greaterThan    = "gt"
-	lessOrEqual    = "le"
-	greaterOrEqual = "ge"
-)
-
-var (
-	timeType  = reflect.TypeOf(time.Time{})
-	bytesType = reflect.TypeOf([]byte{})
-)
-
-// Equal checks if two values are equal or not. (check both type and value)
-func Equal(left, right interface{}) bool {
-	return compareValue(equal, left, right)
-}
-
-// EqualValue checks if two values are equal or not. (check value only)
-func EqualValue(left, right interface{}) bool {
-	ls, rs := convertor.ToString(left), convertor.ToString(right)
-	return ls == rs
-}
-
-// LessThan checks if value `left` less than value `right`.
-func LessThan(left, right interface{}) bool {
-	return compareValue(lessThan, left, right)
-}
-
-// GreaterThan checks if value `left` greater than value `right`.
-func GreaterThan(left, right interface{}) bool {
-	return compareValue(greaterThan, left, right)
-}
-
-// LessOrEqual checks if value `left` less than or equal to value `right`.
-func LessOrEqual(left, right interface{}) bool {
-	return compareValue(lessOrEqual, left, right)
-}
-
-// GreaterOrEqual checks if value `left` greater than or equal to value `right`.
-func GreaterOrEqual(left, right interface{}) bool {
-	return compareValue(greaterOrEqual, left, right)
-}

compare/compare_example_test.go

@@ -1,170 +0,0 @@
-package compare
-
-import (
-	"fmt"
-	"time"
-)
-
-func ExampleEqual() {
-	result1 := Equal(1, 1)
-	result2 := Equal("1", "1")
-	result3 := Equal([]int{1, 2, 3}, []int{1, 2, 3})
-	result4 := Equal(map[int]string{1: "a", 2: "b"}, map[int]string{1: "a", 2: "b"})
-
-	result5 := Equal(1, "1")
-	result6 := Equal(1, int64(1))
-	result7 := Equal([]int{1, 2}, []int{1, 2, 3})
-
-	fmt.Println(result1)
-	fmt.Println(result2)
-	fmt.Println(result3)
-	fmt.Println(result4)
-	fmt.Println(result5)
-	fmt.Println(result6)
-	fmt.Println(result7)
-
-	// Output:
-	// true
-	// true
-	// true
-	// true
-	// false
-	// false
-	// false
-}
-
-func ExampleEqualValue() {
-	result1 := EqualValue(1, 1)
-	result2 := EqualValue(int(1), int64(1))
-	result3 := EqualValue(1, "1")
-	result4 := EqualValue(1, "2")
-
-	fmt.Println(result1)
-	fmt.Println(result2)
-	fmt.Println(result3)
-	fmt.Println(result4)
-
-	// Output:
-	// true
-	// true
-	// true
-	// false
-}
-
-func ExampleLessThan() {
-	result1 := LessThan(1, 2)
-	result2 := LessThan(1.1, 2.2)
-	result3 := LessThan("a", "b")
-
-	time1 := time.Now()
-	time2 := time1.Add(time.Second)
-	result4 := LessThan(time1, time2)
-
-	result5 := LessThan(2, 1)
-	result6 := LessThan(1, int64(2))
-
-	fmt.Println(result1)
-	fmt.Println(result2)
-	fmt.Println(result3)
-	fmt.Println(result4)
-	fmt.Println(result5)
-	fmt.Println(result6)
-
-	// Output:
-	// true
-	// true
-	// true
-	// true
-	// false
-	// false
-}
-
-func ExampleGreaterThan() {
-	result1 := GreaterThan(2, 1)
-	result2 := GreaterThan(2.2, 1.1)
-	result3 := GreaterThan("b", "a")
-
-	time1 := time.Now()
-	time2 := time1.Add(time.Second)
-	result4 := GreaterThan(time2, time1)
-
-	result5 := GreaterThan(1, 2)
-	result6 := GreaterThan(int64(2), 1)
-	result7 := GreaterThan("b", "c")
-
-	fmt.Println(result1)
-	fmt.Println(result2)
-	fmt.Println(result3)
-	fmt.Println(result4)
-	fmt.Println(result5)
-	fmt.Println(result6)
-	fmt.Println(result7)
-
-	// Output:
-	// true
-	// true
-	// true
-	// true
-	// false
-	// false
-	// false
-}
-
-func ExampleLessOrEqual() {
-	result1 := LessOrEqual(1, 1)
-	result2 := LessOrEqual(1.1, 2.2)
-	result3 := LessOrEqual("a", "b")
-
-	time1 := time.Now()
-	time2 := time1.Add(time.Second)
-	result4 := LessOrEqual(time1, time2)
-
-	result5 := LessOrEqual(2, 1)
-	result6 := LessOrEqual(1, int64(2))
-
-	fmt.Println(result1)
-	fmt.Println(result2)
-	fmt.Println(result3)
-	fmt.Println(result4)
-	fmt.Println(result5)
-	fmt.Println(result6)
-
-	// Output:
-	// true
-	// true
-	// true
-	// true
-	// false
-	// false
-}
-
-func ExampleGreaterOrEqual() {
-	result1 := GreaterOrEqual(1, 1)
-	result2 := GreaterOrEqual(2.2, 1.1)
-	result3 := GreaterOrEqual("b", "b")
-
-	time1 := time.Now()
-	time2 := time1.Add(time.Second)
-	result4 := GreaterOrEqual(time2, time1)
-
-	result5 := GreaterOrEqual(1, 2)
-	result6 := GreaterOrEqual(int64(2), 1)
-	result7 := GreaterOrEqual("b", "c")
-
-	fmt.Println(result1)
-	fmt.Println(result2)
-	fmt.Println(result3)
-	fmt.Println(result4)
-	fmt.Println(result5)
-	fmt.Println(result6)
-	fmt.Println(result7)
-
-	// Output:
-	// true
-	// true
-	// true
-	// true
-	// false
-	// false
-	// false
-}

compare/compare_internal.go

@@ -1,297 +0,0 @@
-package compare
-
-import (
-	"bytes"
-	"encoding/json"
-	"math/big"
-	"reflect"
-	"time"
-
-	"github.com/duke-git/lancet/convertor"
-)
-
-func compareValue(operator string, left, right interface{}) bool {
-	leftType, rightType := reflect.TypeOf(left), reflect.TypeOf(right)
-
-	if leftType.Kind() != rightType.Kind() {
-		return false
-	}
-
-	switch leftType.Kind() {
-	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
-		reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
-		reflect.Float32, reflect.Float64, reflect.Bool, reflect.String:
-		return compareBasicValue(operator, left, right)
-
-	case reflect.Struct, reflect.Slice, reflect.Map:
-		return compareRefValue(operator, left, right, leftType.Kind())
-	}
-
-	return false
-}
-
-func compareRefValue(operator string, leftObj, rightObj interface{}, kind reflect.Kind) bool {
-	leftVal, rightVal := reflect.ValueOf(leftObj), reflect.ValueOf(rightObj)
-
-	switch kind {
-	case reflect.Struct:
-
-		// compare time
-		// fix: issue #275
-		if canConvert(leftObj, timeType) {
-			timeObj1, ok := leftObj.(time.Time)
-			if !ok {
-				timeObj1 = leftVal.Convert(timeType).Interface().(time.Time)
-			}
-
-			timeObj2, ok := rightObj.(time.Time)
-			if !ok {
-				timeObj2 = rightVal.Convert(timeType).Interface().(time.Time)
-			}
-
-			return compareBasicValue(operator, timeObj1.UnixNano(), timeObj2.UnixNano())
-		}
-
-		// for other struct type, only process equal operator
-		switch operator {
-		case equal:
-			return objectsAreEqualValues(leftObj, rightObj)
-		}
-
-	case reflect.Slice:
-		// compare []byte
-		if canConvert(leftObj, bytesType) {
-			bytesObj1, ok := leftObj.([]byte)
-			if !ok {
-				bytesObj1 = leftVal.Convert(bytesType).Interface().([]byte)
-			}
-			bytesObj2, ok := rightObj.([]byte)
-			if !ok {
-				bytesObj2 = rightVal.Convert(bytesType).Interface().([]byte)
-			}
-
-			switch operator {
-			case equal:
-				if bytes.Compare(bytesObj1, bytesObj2) == 0 {
-					return true
-				}
-			case lessThan:
-				if bytes.Compare(bytesObj1, bytesObj2) == -1 {
-					return true
-				}
-			case greaterThan:
-				if bytes.Compare(bytesObj1, bytesObj2) == 1 {
-					return true
-				}
-			case lessOrEqual:
-				if bytes.Compare(bytesObj1, bytesObj2) <= 0 {
-					return true
-				}
-			case greaterOrEqual:
-				if bytes.Compare(bytesObj1, bytesObj2) >= 0 {
-					return true
-				}
-			}
-
-		}
-
-		// for other type slice, only process equal operator
-		switch operator {
-		case equal:
-			return reflect.DeepEqual(leftObj, rightObj)
-		}
-
-	case reflect.Map:
-		// only process equal operator
-		switch operator {
-		case equal:
-			return reflect.DeepEqual(leftObj, rightObj)
-		}
-	}
-
-	return false
-}
-
-func objectsAreEqualValues(expected, actual interface{}) bool {
-	if objectsAreEqual(expected, actual) {
-		return true
-	}
-
-	actualType := reflect.TypeOf(actual)
-	if actualType == nil {
-		return false
-	}
-	expectedValue := reflect.ValueOf(expected)
-	if expectedValue.IsValid() && expectedValue.Type().ConvertibleTo(actualType) {
-		// Attempt comparison after type conversion
-		return reflect.DeepEqual(expectedValue.Convert(actualType).Interface(), actual)
-	}
-
-	return false
-}
-
-func objectsAreEqual(expected, actual interface{}) bool {
-	if expected == nil || actual == nil {
-		return expected == actual
-	}
-
-	exp, ok := expected.([]byte)
-	if !ok {
-		return reflect.DeepEqual(expected, actual)
-	}
-
-	act, ok := actual.([]byte)
-	if !ok {
-		return false
-	}
-	if exp == nil || act == nil {
-		return exp == nil && act == nil
-	}
-	return bytes.Equal(exp, act)
-}
-
-// compareBasic compare basic value: integer, float, string, bool
-func compareBasicValue(operator string, leftValue, rightValue interface{}) bool {
-	if leftValue == nil && rightValue == nil && operator == equal {
-		return true
-	}
-
-	switch leftVal := leftValue.(type) {
-	case int, uint, int8, uint8, int16, uint16, int32, uint32, int64, uint64:
-		left, err := convertor.ToBigInt(leftValue)
-		if err != nil {
-			return false
-		}
-
-		right, err := convertor.ToBigInt(rightValue)
-		if err != nil {
-			return false
-		}
-
-		return compareBigInt(operator, left, right)
-
-	case float32, float64:
-		left, err := convertor.ToFloat(leftValue)
-		if err != nil {
-			return false
-		}
-		right, err := convertor.ToFloat(rightValue)
-		if err != nil {
-			return false
-		}
-
-		return compareFloats(operator, left, right)
-
-	case string:
-		left := leftVal
-		switch right := rightValue.(type) {
-		case string:
-			return compareStrings(operator, left, right)
-		}
-
-	case bool:
-		left := leftVal
-		switch right := rightValue.(type) {
-		case bool:
-			return compareBools(operator, left, right)
-		}
-
-	case json.Number:
-		if left, err := leftVal.Float64(); err == nil {
-			switch rightVal := rightValue.(type) {
-			case json.Number:
-				if right, err := rightVal.Float64(); err == nil {
-					return compareFloats(operator, left, right)
-				}
-			case float32, float64:
-				right, err := convertor.ToFloat(rightValue)
-				if err != nil {
-					return false
-				}
-				return compareFloats(operator, left, right)
-
-			case int, uint, int8, uint8, int16, uint16, int32, uint32, int64, uint64:
-				right, err := convertor.ToBigInt(rightValue)
-				if err != nil {
-					return false
-				}
-				left, err := convertor.ToBigInt(left)
-				return compareBigInt(operator, left, right)
-			}
-		}
-	}
-
-	return false
-}
-
-// compareBigInt compares two big.Int values based on the operator
-func compareBigInt(operator string, left, right *big.Int) bool {
-	switch operator {
-	case equal:
-		return left.Cmp(right) == 0
-	case lessThan:
-		return left.Cmp(right) < 0
-	case greaterThan:
-		return left.Cmp(right) > 0
-	case lessOrEqual:
-		return left.Cmp(right) <= 0
-	case greaterOrEqual:
-		return left.Cmp(right) >= 0
-	}
-	return false
-}
-
-// compareFloats compares two float64 values based on the operator
-func compareFloats(operator string, left, right float64) bool {
-	switch operator {
-	case equal:
-		return left == right
-	case lessThan:
-		return left < right
-	case greaterThan:
-		return left > right
-	case lessOrEqual:
-		return left <= right
-	case greaterOrEqual:
-		return left >= right
-	}
-	return false
-}
-
-// compareStrings compares two string values based on the operator
-func compareStrings(operator string, left, right string) bool {
-	switch operator {
-	case equal:
-		return left == right
-	case lessThan:
-		return left < right
-	case greaterThan:
-		return left > right
-	case lessOrEqual:
-		return left <= right
-	case greaterOrEqual:
-		return left >= right
-	}
-	return false
-}
-
-// compareBools compares two boolean values based on the operator
-func compareBools(operator string, left, right bool) bool {
-	switch operator {
-	case equal:
-		return left == right
-	}
-	return false
-}
-
-// canConvert checks if the value can be converted to the target type
-func canConvert(value interface{}, targetType reflect.Type) bool {
-	v := reflect.ValueOf(value)
-
-	defer func() {
-		if r := recover(); r != nil {
-		}
-	}()
-	v.Convert(targetType)
-	return true
-}

compare/compare_test.go

@@ -1,145 +0,0 @@
-package compare
-
-import (
-	"encoding/json"
-	"testing"
-	"time"
-
-	"github.com/duke-git/lancet/internal"
-)
-
-func TestEqual(t *testing.T) {
-	assert := internal.NewAssert(t, "TestEqual")
-
-	assert.Equal(true, Equal(1, 1))
-	assert.Equal(true, Equal(int64(1), int64(1)))
-	assert.Equal(true, Equal("a", "a"))
-	assert.Equal(true, Equal(true, true))
-	assert.Equal(true, Equal([]int{1, 2, 3}, []int{1, 2, 3}))
-	assert.Equal(true, Equal(map[int]string{1: "a", 2: "b"}, map[int]string{1: "a", 2: "b"}))
-
-	assert.Equal(false, Equal(1, 2))
-	assert.Equal(false, Equal(1, int64(1)))
-	assert.Equal(false, Equal("a", "b"))
-	assert.Equal(false, Equal(true, false))
-	assert.Equal(false, Equal([]int{1, 2}, []int{1, 2, 3}))
-	assert.Equal(false, Equal(map[int]string{1: "a", 2: "b"}, map[int]string{1: "a"}))
-
-	time1 := time.Now()
-	time2 := time1.Add(time.Second)
-	time3 := time1.Add(time.Second)
-
-	assert.Equal(false, Equal(time1, time2))
-	assert.Equal(true, Equal(time2, time3))
-
-	st1 := struct {
-		A string
-		B string
-	}{
-		A: "a",
-		B: "b",
-	}
-
-	st2 := struct {
-		A string
-		B string
-	}{
-		A: "a",
-		B: "b",
-	}
-
-	st3 := struct {
-		A string
-		B string
-	}{
-		A: "a1",
-		B: "b",
-	}
-
-	assert.Equal(true, Equal(st1, st2))
-	assert.Equal(false, Equal(st1, st3))
-}
-
-func TestEqualValue(t *testing.T) {
-	assert := internal.NewAssert(t, "TestEqualValue")
-
-	assert.Equal(true, EqualValue(1, 1))
-	assert.Equal(true, EqualValue(int(1), int64(1)))
-	assert.Equal(true, EqualValue(1, "1"))
-
-	assert.Equal(false, EqualValue(1, "2"))
-}
-
-func TestLessThan(t *testing.T) {
-	t.Parallel()
-	assert := internal.NewAssert(t, "TestLessThan")
-
-	tests := []struct {
-		left  interface{}
-		right interface{}
-		want  bool
-	}{
-		{1, 2, true},
-		{1.1, 2.2, true},
-		{"a", "b", true},
-		{time.Now(), time.Now().Add(time.Second), true},
-		{[]byte("hello1"), []byte("hello2"), true},
-		{json.Number("123"), json.Number("124"), true},
-		{645680099112988673, 645680099112988675, true},
-		{1, 1, false},
-		{1, int64(1), false},
-	}
-
-	for _, tt := range tests {
-		assert.Equal(tt.want, LessThan(tt.left, tt.right))
-	}
-}
-
-func TestGreaterThan(t *testing.T) {
-	assert := internal.NewAssert(t, "TestGreaterThan")
-
-	assert.Equal(true, GreaterThan(2, 1))
-	assert.Equal(true, GreaterThan(2.2, 1.1))
-	assert.Equal(true, GreaterThan("b", "a"))
-
-	time1 := time.Now()
-	time2 := time1.Add(time.Second)
-	assert.Equal(true, GreaterThan(time2, time1))
-
-	assert.Equal(false, GreaterThan(1, 2))
-	assert.Equal(false, GreaterThan(int64(2), 1))
-	assert.Equal(false, GreaterThan("b", "c"))
-}
-
-func TestLessOrEqual(t *testing.T) {
-	assert := internal.NewAssert(t, "TestLessOrEqual")
-
-	assert.Equal(true, LessOrEqual(1, 2))
-	assert.Equal(true, LessOrEqual(1, 1))
-	assert.Equal(true, LessOrEqual(1.1, 2.2))
-	assert.Equal(true, LessOrEqual("a", "b"))
-
-	time1 := time.Now()
-	time2 := time1.Add(time.Second)
-	assert.Equal(true, LessOrEqual(time1, time2))
-
-	assert.Equal(false, LessOrEqual(2, 1))
-	assert.Equal(false, LessOrEqual(1, int64(2)))
-}
-
-func TestGreaterOrEqual(t *testing.T) {
-	assert := internal.NewAssert(t, "TestGreaterThan")
-
-	assert.Equal(true, GreaterOrEqual(2, 1))
-	assert.Equal(true, GreaterOrEqual(1, 1))
-	assert.Equal(true, GreaterOrEqual(2.2, 1.1))
-	assert.Equal(true, GreaterOrEqual("b", "b"))
-
-	time1 := time.Now()
-	time2 := time1.Add(time.Second)
-	assert.Equal(true, GreaterOrEqual(time2, time1))
-
-	assert.Equal(false, GreaterOrEqual(1, 2))
-	assert.Equal(false, GreaterOrEqual(int64(2), 1))
-	assert.Equal(false, GreaterOrEqual("b", "c"))
-}

concurrency/channel.go

@@ -0,0 +1,243 @@
+// Copyright 2021 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package concurrency contain some functions to support concurrent programming. eg, goroutine, channel, async.
+package concurrency
+
+import (
+	"context"
+	"sync"
+)
+
+// Channel is a logic object which can generate or manipulate go channel
+// all methods of Channel are in the book tilted《Concurrency in Go》
+type Channel struct {
+}
+
+// NewChannel return a Channel instance
+func NewChannel() *Channel {
+	return &Channel{}
+}
+
+// Generate a data of type any chan, put param `values` into the chan
+func (c *Channel) Generate(ctx context.Context, values ...any) <-chan any {
+	dataStream := make(chan any)
+
+	go func() {
+		defer close(dataStream)
+
+		for _, v := range values {
+			select {
+			case <-ctx.Done():
+				return
+			case dataStream <- v:
+			}
+		}
+	}()
+
+	return dataStream
+}
+
+// Repeat return a data of type any chan, put param `values` into the chan repeatly until cancel the context.
+func (c *Channel) Repeat(ctx context.Context, values ...any) <-chan any {
+	dataStream := make(chan any)
+
+	go func() {
+		defer close(dataStream)
+		for {
+			for _, v := range values {
+				select {
+				case <-ctx.Done():
+					return
+				case dataStream <- v:
+				}
+			}
+		}
+	}()
+	return dataStream
+}
+
+// RepeatFn return a chan, excutes fn repeatly, and put the result into retruned chan
+// until close the `done` channel
+func (c *Channel) RepeatFn(ctx context.Context, fn func() any) <-chan any {
+	dataStream := make(chan any)
+
+	go func() {
+		defer close(dataStream)
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case dataStream <- fn():
+			}
+		}
+	}()
+	return dataStream
+}
+
+// Take return a chan whose values are tahken from another chan
+func (c *Channel) Take(ctx context.Context, valueStream <-chan any, number int) <-chan any {
+	takeStream := make(chan any)
+
+	go func() {
+		defer close(takeStream)
+
+		for i := 0; i < number; i++ {
+			select {
+			case <-ctx.Done():
+				return
+			case takeStream <- <-valueStream:
+			}
+		}
+	}()
+
+	return takeStream
+}
+
+// FanIn merge multiple channels into one channel
+func (c *Channel) FanIn(ctx context.Context, channels ...<-chan any) <-chan any {
+	out := make(chan any)
+
+	go func() {
+		var wg sync.WaitGroup
+		wg.Add(len(channels))
+
+		for _, c := range channels {
+			go func(c <-chan any) {
+				defer wg.Done()
+				for v := range c {
+					select {
+					case <-ctx.Done():
+						return
+					case out <- v:
+					}
+				}
+			}(c)
+		}
+		wg.Wait()
+		close(out)
+	}()
+
+	return out
+}
+
+// Tee split one chanel into two channels
+func (c *Channel) Tee(ctx context.Context, in <-chan any) (<-chan any, <-chan any) {
+	out1 := make(chan any)
+	out2 := make(chan any)
+
+	go func() {
+		defer close(out1)
+		defer close(out2)
+
+		for val := range c.OrDone(ctx, in) {
+			var out1, out2 = out1, out2
+			for i := 0; i < 2; i++ {
+				select {
+				case <-ctx.Done():
+				case out1 <- val:
+					out1 = nil
+				case out2 <- val:
+					out2 = nil
+				}
+			}
+		}
+	}()
+
+	return out1, out2
+}
+
+// Bridge link multiply channels into one channel
+func (c *Channel) Bridge(ctx context.Context, chanStream <-chan <-chan any) <-chan any {
+	valStream := make(chan any)
+
+	go func() {
+		defer close(valStream)
+
+		for {
+			var stream <-chan any
+			select {
+			case maybeStream, ok := <-chanStream:
+				if ok == false {
+					return
+				}
+				stream = maybeStream
+			case <-ctx.Done():
+				return
+			}
+
+			for val := range c.OrDone(ctx, stream) {
+				select {
+				case valStream <- val:
+				case <-ctx.Done():
+				}
+			}
+		}
+	}()
+
+	return valStream
+}
+
+// Or read one or more channels into one channel, will close when any readin channel is closed
+func (c *Channel) Or(channels ...<-chan any) <-chan any {
+	switch len(channels) {
+	case 0:
+		return nil
+	case 1:
+		return channels[0]
+	}
+
+	orDone := make(chan any)
+
+	go func() {
+		defer close(orDone)
+
+		switch len(channels) {
+		case 2:
+			select {
+			case <-channels[0]:
+			case <-channels[1]:
+			}
+		default:
+			m := len(channels) / 2
+			select {
+			case <-c.Or(channels[:m]...):
+			case <-c.Or(channels[m:]...):
+			}
+			// select {
+			// case <-channels[0]:
+			// case <-channels[1]:
+			// case <-channels[2]:
+			// case <-c.Or(append(channels[3:], orDone)...):
+			// }
+		}
+	}()
+
+	return orDone
+}
+
+// OrDone read a channel into another channel, will close until cancel context.
+func (c *Channel) OrDone(ctx context.Context, channel <-chan any) <-chan any {
+	valStream := make(chan any)
+
+	go func() {
+		defer close(valStream)
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case v, ok := <-channel:
+				if !ok {
+					return
+				}
+				select {
+				case valStream <- v:
+				case <-ctx.Done():
+				}
+			}
+		}
+
+	}()
+
+	return valStream
+}

concurrency/channel_test.go

@@ -0,0 +1,206 @@
+package concurrency
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestGenerate(t *testing.T) {
+	assert := internal.NewAssert(t, "TestGenerate")
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	c := NewChannel()
+	intStream := c.Generate(ctx, 1, 2, 3)
+
+	// for v := range intStream {
+	// 	t.Log(v) //1, 2, 3
+	// }
+	assert.Equal(1, <-intStream)
+	assert.Equal(2, <-intStream)
+	assert.Equal(3, <-intStream)
+}
+
+func TestRepeat(t *testing.T) {
+	assert := internal.NewAssert(t, "TestRepeat")
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	c := NewChannel()
+	intStream := c.Take(ctx, c.Repeat(ctx, 1, 2), 5)
+
+	// for v := range intStream {
+	// 	t.Log(v) //1, 2, 1, 2, 1
+	// }
+	assert.Equal(1, <-intStream)
+	assert.Equal(2, <-intStream)
+	assert.Equal(1, <-intStream)
+	assert.Equal(2, <-intStream)
+	assert.Equal(1, <-intStream)
+}
+
+func TestRepeatFn(t *testing.T) {
+	assert := internal.NewAssert(t, "TestRepeatFn")
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	fn := func() any {
+		s := "a"
+		return s
+	}
+	c := NewChannel()
+	dataStream := c.Take(ctx, c.RepeatFn(ctx, fn), 3)
+
+	// for v := range dataStream {
+	// 	t.Log(v) //a, a, a
+	// }
+
+	assert.Equal("a", <-dataStream)
+	assert.Equal("a", <-dataStream)
+	assert.Equal("a", <-dataStream)
+}
+
+func TestTake(t *testing.T) {
+	assert := internal.NewAssert(t, "TestTake")
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	numbers := make(chan any, 5)
+	numbers <- 1
+	numbers <- 2
+	numbers <- 3
+	numbers <- 4
+	numbers <- 5
+	defer close(numbers)
+
+	c := NewChannel()
+	intStream := c.Take(ctx, numbers, 3)
+
+	assert.Equal(1, <-intStream)
+	assert.Equal(2, <-intStream)
+	assert.Equal(3, <-intStream)
+}
+
+func TestFanIn(t *testing.T) {
+	assert := internal.NewAssert(t, "TestFanIn")
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	c := NewChannel()
+	channels := make([]<-chan any, 3)
+
+	for i := 0; i < 3; i++ {
+		channels[i] = c.Take(ctx, c.Repeat(ctx, i), 3)
+	}
+
+	mergedChannel := c.FanIn(ctx, channels...)
+
+	for val := range mergedChannel {
+		t.Logf("\t%d\n", val)
+	}
+
+	assert.Equal(1, 1)
+}
+
+func TestOr(t *testing.T) {
+	assert := internal.NewAssert(t, "TestOr")
+
+	sig := func(after time.Duration) <-chan any {
+		c := make(chan interface{})
+		go func() {
+			defer close(c)
+			time.Sleep(after)
+		}()
+		return c
+	}
+
+	start := time.Now()
+
+	c := NewChannel()
+	<-c.Or(
+		sig(1*time.Second),
+		sig(2*time.Second),
+		sig(3*time.Second),
+		sig(4*time.Second),
+		sig(5*time.Second),
+	)
+
+	t.Logf("done after %v", time.Since(start))
+
+	assert.Equal(1, 1)
+}
+
+func TestOrDone(t *testing.T) {
+	assert := internal.NewAssert(t, "TestOrDone")
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	c := NewChannel()
+	intStream := c.Take(ctx, c.Repeat(ctx, 1), 3)
+
+	var res any
+	for val := range c.OrDone(ctx, intStream) {
+		t.Logf("%v", val)
+		res = val
+	}
+
+	assert.Equal(1, res)
+}
+
+func TestTee(t *testing.T) {
+	assert := internal.NewAssert(t, "TestTee")
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	c := NewChannel()
+	inStream := c.Take(ctx, c.Repeat(ctx, 1), 4)
+
+	out1, out2 := c.Tee(ctx, inStream)
+	for val := range out1 {
+		val1 := val
+		val2 := <-out2
+		// t.Log("val1 is", val1)
+		// t.Log("val2 is", val2)
+		assert.Equal(1, val1)
+		assert.Equal(1, val2)
+	}
+}
+
+func TestBridge(t *testing.T) {
+	assert := internal.NewAssert(t, "TestBridge")
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	c := NewChannel()
+	genVals := func() <-chan <-chan any {
+		chanStream := make(chan (<-chan any))
+		go func() {
+			defer close(chanStream)
+			for i := 0; i < 10; i++ {
+				stream := make(chan any, 1)
+				stream <- i
+				close(stream)
+				chanStream <- stream
+			}
+		}()
+		return chanStream
+	}
+
+	index := 0
+	for val := range c.Bridge(ctx, genVals()) {
+		// t.Logf("%v ", val) //0 1 2 3 4 5 6 7 8 9
+		assert.Equal(index, val)
+		index++
+	}
+}

convertor/convertor.go

@@ -6,22 +6,14 @@ package convertor
 
 import (
 	"bytes"
-	"encoding/base64"
 	"encoding/binary"
-	"encoding/gob"
 	"encoding/json"
-	"errors"
 	"fmt"
-	"io"
 	"math"
-	"math/big"
 	"reflect"
 	"regexp"
 	"strconv"
 	"strings"
-
-	"golang.org/x/text/encoding/simplifiedchinese"
-	"golang.org/x/text/transform"
 )
 
 // ToBool convert string to a boolean
@@ -30,7 +22,7 @@ func ToBool(s string) (bool, error) {
 }
 
 // ToBytes convert interface to bytes
-func ToBytes(value interface{}) ([]byte, error) {
+func ToBytes(value any) ([]byte, error) {
 	v := reflect.ValueOf(value)
 
 	switch value.(type) {
@@ -82,129 +74,146 @@ func ToChar(s string) []string {
 	return c
 }
 
+// ToChannel convert a array of elements to a read-only channels
+func ToChannel[T any](array []T) <-chan T {
+	ch := make(chan T)
+
+	go func() {
+		for _, item := range array {
+			ch <- item
+		}
+		close(ch)
+	}()
+
+	return ch
+}
+
 // ToString convert value to string
-func ToString(value interface{}) string {
+func ToString(value any) string {
+	result := ""
 	if value == nil {
-		return ""
+		return result
 	}
 
-	switch val := value.(type) {
-	case float32:
-		return strconv.FormatFloat(float64(val), 'f', -1, 32)
-	case float64:
-		return strconv.FormatFloat(val, 'f', -1, 64)
-	case int:
-		return strconv.FormatInt(int64(val), 10)
-	case int8:
-		return strconv.FormatInt(int64(val), 10)
-	case int16:
-		return strconv.FormatInt(int64(val), 10)
-	case int32:
-		return strconv.FormatInt(int64(val), 10)
-	case int64:
-		return strconv.FormatInt(val, 10)
-	case uint:
-		return strconv.FormatUint(uint64(val), 10)
-	case uint8:
-		return strconv.FormatUint(uint64(val), 10)
-	case uint16:
-		return strconv.FormatUint(uint64(val), 10)
-	case uint32:
-		return strconv.FormatUint(uint64(val), 10)
-	case uint64:
-		return strconv.FormatUint(val, 10)
+	v := reflect.ValueOf(value)
+
+	switch value.(type) {
+	case float32, float64:
+		result = strconv.FormatFloat(v.Float(), 'f', -1, 64)
+		return result
+	case int, int8, int16, int32, int64:
+		result = strconv.FormatInt(v.Int(), 10)
+		return result
+	case uint, uint8, uint16, uint32, uint64:
+		result = strconv.FormatUint(v.Uint(), 10)
+		return result
 	case string:
-		return val
+		result = v.String()
+		return result
 	case []byte:
-		return string(val)
+		result = string(v.Bytes())
+		return result
 	default:
-		b, err := json.Marshal(val)
-		if err != nil {
-			return ""
-		}
-		return string(b)
+		newValue, _ := json.Marshal(value)
+		result = string(newValue)
+		return result
 	}
 }
 
 // ToJson convert value to a valid json string
-func ToJson(value interface{}) (string, error) {
-	res, err := json.Marshal(value)
+func ToJson(value any) (string, error) {
+	result, err := json.Marshal(value)
 	if err != nil {
 		return "", err
 	}
 
-	return string(res), nil
+	return string(result), nil
 }
 
 // ToFloat convert value to a float64, if input is not a float return 0.0 and error
-func ToFloat(value interface{}) (float64, error) {
+func ToFloat(value any) (float64, error) {
 	v := reflect.ValueOf(value)
 
-	res := 0.0
+	result := 0.0
 	err := fmt.Errorf("ToInt: unvalid interface type %T", value)
 	switch value.(type) {
 	case int, int8, int16, int32, int64:
-		res = float64(v.Int())
-		return res, nil
+		result = float64(v.Int())
+		return result, nil
 	case uint, uint8, uint16, uint32, uint64:
-		res = float64(v.Uint())
-		return res, nil
+		result = float64(v.Uint())
+		return result, nil
 	case float32, float64:
-		res = v.Float()
-		return res, nil
+		result = v.Float()
+		return result, nil
 	case string:
-		res, err = strconv.ParseFloat(v.String(), 64)
+		result, err = strconv.ParseFloat(v.String(), 64)
 		if err != nil {
-			res = 0.0
+			result = 0.0
 		}
-		return res, err
+		return result, err
 	default:
-		return res, err
+		return result, err
 	}
 }
 
 // ToInt convert value to a int64, if input is not a numeric format return 0 and error
-func ToInt(value interface{}) (int64, error) {
+func ToInt(value any) (int64, error) {
 	v := reflect.ValueOf(value)
 
-	var res int64
+	var result int64
 	err := fmt.Errorf("ToInt: invalid interface type %T", value)
 	switch value.(type) {
 	case int, int8, int16, int32, int64:
-		res = v.Int()
-		return res, nil
+		result = v.Int()
+		return result, nil
 	case uint, uint8, uint16, uint32, uint64:
-		res = int64(v.Uint())
-		return res, nil
+		result = int64(v.Uint())
+		return result, nil
 	case float32, float64:
-		res = int64(v.Float())
-		return res, nil
+		result = int64(v.Float())
+		return result, nil
 	case string:
-		res, err = strconv.ParseInt(v.String(), 0, 64)
+		result, err = strconv.ParseInt(v.String(), 0, 64)
 		if err != nil {
-			res = 0
+			result = 0
 		}
-		return res, err
+		return result, err
 	default:
-		return res, err
+		return result, err
 	}
 }
 
+// ToPointer returns a pointer to this value
+func ToPointer[T any](value T) *T {
+	return &value
+}
+
+// ToMap convert a slice or an array of structs to a map based on iteratee function
+func ToMap[T any, K comparable, V any](array []T, iteratee func(T) (K, V)) map[K]V {
+	result := make(map[K]V, len(array))
+	for _, item := range array {
+		k, v := iteratee(item)
+		result[k] = v
+	}
+
+	return result
+}
+
 // StructToMap convert struct to map, only convert exported struct field
 // map key is specified same as struct field tag `json` value
-func StructToMap(value interface{}) (map[string]interface{}, error) {
+func StructToMap(value any) (map[string]any, error) {
 	v := reflect.ValueOf(value)
 	t := reflect.TypeOf(value)
 
 	if t.Kind() == reflect.Ptr {
 		t = t.Elem()
-		v = v.Elem()
 	}
 	if t.Kind() != reflect.Struct {
 		return nil, fmt.Errorf("data type %T not support, shuld be struct or pointer to struct", value)
 	}
 
-	res := make(map[string]interface{})
+	result := make(map[string]any)
 
 	fieldNum := t.NumField()
 	pattern := `^[A-Z]`
@@ -213,12 +222,23 @@ func StructToMap(value interface{}) (map[string]interface{}, error) {
 		name := t.Field(i).Name
 		tag := t.Field(i).Tag.Get("json")
 		if regex.MatchString(name) && tag != "" {
-			//res[name] = v.Field(i).Interface()
-			res[tag] = v.Field(i).Interface()
+			//result[name] = v.Field(i).Interface()
+			result[tag] = v.Field(i).Interface()
 		}
 	}
 
-	return res, nil
+	return result, nil
+}
+
+// MapToSlice convert a map to a slice based on iteratee function
+func MapToSlice[T any, K comparable, V any](aMap map[K]V, iteratee func(K, V) T) []T {
+	result := make([]T, 0, len(aMap))
+
+	for k, v := range aMap {
+		result = append(result, iteratee(k, v))
+	}
+
+	return result
 }
 
 // ColorHexToRGB convert hex color to rgb color
@@ -250,247 +270,3 @@ func ColorRGBToHex(red, green, blue int) string {
 
 	return "#" + r + g + b
 }
-
-// ToChannel convert a array of elements to a read-only channels
-func ToChannel(array []interface{}) <-chan interface{} {
-	ch := make(chan interface{})
-
-	go func() {
-		for _, item := range array {
-			ch <- item
-		}
-		close(ch)
-	}()
-
-	return ch
-}
-
-// EncodeByte encode data to byte
-func EncodeByte(data interface{}) ([]byte, error) {
-	buffer := bytes.NewBuffer(nil)
-	encoder := gob.NewEncoder(buffer)
-	err := encoder.Encode(data)
-	if err != nil {
-		return nil, err
-	}
-	return buffer.Bytes(), nil
-}
-
-// DecodeByte decode byte data to target object
-func DecodeByte(data []byte, target interface{}) error {
-	buffer := bytes.NewBuffer(data)
-	decoder := gob.NewDecoder(buffer)
-	return decoder.Decode(target)
-}
-
-// DeepClone creates a deep copy of passed item.
-// can't clone unexported field of struct
-func DeepClone(src interface{}) interface{} {
-	c := cloner{
-		ptrs: map[reflect.Type]map[uintptr]reflect.Value{},
-	}
-	result := c.clone(reflect.ValueOf(src))
-	if result.Kind() == reflect.Invalid {
-		return nil
-	}
-
-	return result.Interface()
-}
-
-// CopyProperties copies each field from the source into the destination. It recursively copies struct pointers and interfaces that contain struct pointers.
-// use json.Marshal/Unmarshal, so json tag should be set for fields of dst and src struct.
-func CopyProperties(dst, src interface{}) error {
-	dstType, srcType := reflect.TypeOf(dst), reflect.TypeOf(src)
-
-	if dstType.Kind() != reflect.Ptr || dstType.Elem().Kind() != reflect.Struct {
-		return errors.New("CopyProperties: parameter dst should be struct pointer")
-	}
-
-	if srcType.Kind() == reflect.Ptr {
-		srcType = srcType.Elem()
-	}
-	if srcType.Kind() != reflect.Struct {
-		return errors.New("CopyProperties: parameter src should be a struct or struct pointer")
-	}
-
-	bytes, err := json.Marshal(src)
-	if err != nil {
-		return fmt.Errorf("CopyProperties: unable to marshal src: %s", err)
-	}
-	err = json.Unmarshal(bytes, dst)
-	if err != nil {
-		return fmt.Errorf("CopyProperties: unable to unmarshal into dst: %s", err)
-	}
-
-	return nil
-}
-
-// ToInterface converts reflect value to its interface type.
-func ToInterface(v reflect.Value) (value interface{}, ok bool) {
-	if v.IsValid() && v.CanInterface() {
-		return v.Interface(), true
-	}
-	switch v.Kind() {
-	case reflect.Bool:
-		return v.Bool(), true
-	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
-		return v.Int(), true
-	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
-		return v.Uint(), true
-	case reflect.Float32, reflect.Float64:
-		return v.Float(), true
-	case reflect.Complex64, reflect.Complex128:
-		return v.Complex(), true
-	case reflect.String:
-		return v.String(), true
-	case reflect.Ptr:
-		return ToInterface(v.Elem())
-	case reflect.Interface:
-		return ToInterface(v.Elem())
-	default:
-		return nil, false
-	}
-}
-
-// Utf8ToGbk convert utf8 encoding data to GBK encoding data.
-func Utf8ToGbk(bs []byte) ([]byte, error) {
-	r := transform.NewReader(bytes.NewReader(bs), simplifiedchinese.GBK.NewEncoder())
-	b, err := io.ReadAll(r)
-	return b, err
-}
-
-// GbkToUtf8 convert GBK encoding data to utf8 encoding data.
-func GbkToUtf8(bs []byte) ([]byte, error) {
-	r := transform.NewReader(bytes.NewReader(bs), simplifiedchinese.GBK.NewDecoder())
-	b, err := io.ReadAll(r)
-	return b, err
-}
-
-// MapToStruct converts map to struct
-func MapToStruct(m map[string]interface{}, structObj interface{}) error {
-	for k, v := range m {
-		err := setStructField(structObj, k, v)
-		if err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-// ToStdBase64 convert data to standard base64 encoding.
-func ToStdBase64(value interface{}) string {
-	if value == nil || (reflect.ValueOf(value).Kind() == reflect.Ptr && reflect.ValueOf(value).IsNil()) {
-		return ""
-	}
-	switch value.(type) {
-	case []byte:
-		return base64.StdEncoding.EncodeToString(value.([]byte))
-	case string:
-		return base64.StdEncoding.EncodeToString([]byte(value.(string)))
-	case error:
-		return base64.StdEncoding.EncodeToString([]byte(value.(error).Error()))
-	default:
-		marshal, err := json.Marshal(value)
-		if err != nil {
-			return ""
-		}
-		return base64.StdEncoding.EncodeToString(marshal)
-	}
-}
-
-// ToUrlBase64 convert data to URL base64 encoding.
-func ToUrlBase64(value interface{}) string {
-	if value == nil || (reflect.ValueOf(value).Kind() == reflect.Ptr && reflect.ValueOf(value).IsNil()) {
-		return ""
-	}
-	switch value.(type) {
-	case []byte:
-		return base64.URLEncoding.EncodeToString(value.([]byte))
-	case string:
-		return base64.URLEncoding.EncodeToString([]byte(value.(string)))
-	case error:
-		return base64.URLEncoding.EncodeToString([]byte(value.(error).Error()))
-	default:
-		marshal, err := json.Marshal(value)
-		if err != nil {
-			return ""
-		}
-		return base64.URLEncoding.EncodeToString(marshal)
-	}
-}
-
-// ToRawStdBase64 convert data to raw standard base64 encoding.
-func ToRawStdBase64(value interface{}) string {
-	if value == nil || (reflect.ValueOf(value).Kind() == reflect.Ptr && reflect.ValueOf(value).IsNil()) {
-		return ""
-	}
-	switch value.(type) {
-	case []byte:
-		return base64.RawStdEncoding.EncodeToString(value.([]byte))
-	case string:
-		return base64.RawStdEncoding.EncodeToString([]byte(value.(string)))
-	case error:
-		return base64.RawStdEncoding.EncodeToString([]byte(value.(error).Error()))
-	default:
-		marshal, err := json.Marshal(value)
-		if err != nil {
-			return ""
-		}
-		return base64.RawStdEncoding.EncodeToString(marshal)
-	}
-}
-
-// ToRawUrlBase64 convert data to raw URL base64 encoding.
-func ToRawUrlBase64(value interface{}) string {
-	if value == nil || (reflect.ValueOf(value).Kind() == reflect.Ptr && reflect.ValueOf(value).IsNil()) {
-		return ""
-	}
-	switch value.(type) {
-	case []byte:
-		return base64.RawURLEncoding.EncodeToString(value.([]byte))
-	case string:
-		return base64.RawURLEncoding.EncodeToString([]byte(value.(string)))
-	case error:
-		return base64.RawURLEncoding.EncodeToString([]byte(value.(error).Error()))
-	default:
-		marshal, err := json.Marshal(value)
-		if err != nil {
-			return ""
-		}
-		return base64.RawURLEncoding.EncodeToString(marshal)
-	}
-}
-
-// ToBigInt converts an integer of any supported type (int, int64, uint64, etc.) to *big.Int
-// Play: todo
-func ToBigInt(v interface{}) (*big.Int, error) {
-	result := new(big.Int)
-
-	switch v := (v).(type) {
-	case int:
-		result.SetInt64(int64(v))
-	case int8:
-		result.SetInt64(int64(v))
-	case int16:
-		result.SetInt64(int64(v))
-	case int32:
-		result.SetInt64(int64(v))
-	case int64:
-		result.SetInt64(v)
-	case uint:
-		result.SetUint64(uint64(v))
-	case uint8:
-		result.SetUint64(uint64(v))
-	case uint16:
-		result.SetUint64(uint64(v))
-	case uint32:
-		result.SetUint64(uint64(v))
-	case uint64:
-		result.SetUint64(v)
-	default:
-		return nil, fmt.Errorf("unsupported type: %T", v)
-	}
-
-	return result, nil
-}

convertor/convertor_internal.go

@@ -1,298 +0,0 @@
-// Copyright 2023 dudaodong@gmail.com. All rights reserved.
-// Use of this source code is governed by MIT license
-
-// Package convertor implements some functions to convert data.
-package convertor
-
-import (
-	"fmt"
-	"reflect"
-)
-
-type cloner struct {
-	ptrs map[reflect.Type]map[uintptr]reflect.Value
-}
-
-// clone return a duplicate of passed item.
-func (c *cloner) clone(v reflect.Value) reflect.Value {
-	switch v.Kind() {
-	case reflect.Invalid:
-		return reflect.ValueOf(nil)
-
-	// bool
-	case reflect.Bool:
-		return reflect.ValueOf(v.Bool())
-
-	//int
-	case reflect.Int:
-		return reflect.ValueOf(int(v.Int()))
-	case reflect.Int8:
-		return reflect.ValueOf(int8(v.Int()))
-	case reflect.Int16:
-		return reflect.ValueOf(int16(v.Int()))
-	case reflect.Int32:
-		return reflect.ValueOf(int32(v.Int()))
-	case reflect.Int64:
-		return reflect.ValueOf(v.Int())
-
-	// uint
-	case reflect.Uint:
-		return reflect.ValueOf(uint(v.Uint()))
-	case reflect.Uint8:
-		return reflect.ValueOf(uint8(v.Uint()))
-	case reflect.Uint16:
-		return reflect.ValueOf(uint16(v.Uint()))
-	case reflect.Uint32:
-		return reflect.ValueOf(uint32(v.Uint()))
-	case reflect.Uint64:
-		return reflect.ValueOf(v.Uint())
-
-	// float
-	case reflect.Float32:
-		return reflect.ValueOf(float32(v.Float()))
-	case reflect.Float64:
-		return reflect.ValueOf(v.Float())
-
-	// complex
-	case reflect.Complex64:
-		return reflect.ValueOf(complex64(v.Complex()))
-	case reflect.Complex128:
-		return reflect.ValueOf(v.Complex())
-
-	// string
-	case reflect.String:
-		return reflect.ValueOf(v.String())
-
-	// array
-	case reflect.Array, reflect.Slice:
-		return c.cloneArray(v)
-
-	// map
-	case reflect.Map:
-		return c.cloneMap(v)
-
-	// Ptr
-	case reflect.Ptr:
-		return c.clonePtr(v)
-
-	// struct
-	case reflect.Struct:
-		return c.cloneStruct(v)
-
-	// func
-	case reflect.Func:
-		return v
-
-	// interface
-	case reflect.Interface:
-		return c.clone(v.Elem())
-
-	}
-
-	return reflect.Zero(v.Type())
-}
-
-func (c *cloner) cloneArray(v reflect.Value) reflect.Value {
-	if v.IsNil() {
-		return reflect.Zero(v.Type())
-	}
-
-	arr := reflect.MakeSlice(v.Type(), v.Len(), v.Len())
-
-	for i := 0; i < v.Len(); i++ {
-		val := c.clone(v.Index(i))
-
-		if val.IsValid() {
-			continue
-		}
-
-		item := arr.Index(i)
-		if !item.CanSet() {
-			continue
-		}
-
-		item.Set(val.Convert(item.Type()))
-	}
-
-	return arr
-}
-
-func (c *cloner) cloneMap(v reflect.Value) reflect.Value {
-	if v.IsNil() {
-		return reflect.Zero(v.Type())
-	}
-
-	clonedMap := reflect.MakeMap(v.Type())
-
-	for _, key := range v.MapKeys() {
-		value := v.MapIndex(key)
-		clonedKey := c.clone(key)
-		clonedValue := c.clone(value)
-
-		if !isNillable(clonedKey) || !clonedKey.IsNil() {
-			clonedKey = clonedKey.Convert(key.Type())
-		}
-
-		if (!isNillable(clonedValue) || !clonedValue.IsNil()) && clonedValue.IsValid() {
-			clonedValue = clonedValue.Convert(value.Type())
-		}
-
-		if !clonedValue.IsValid() {
-			clonedValue = reflect.Zero(clonedMap.Type().Elem())
-		}
-
-		clonedMap.SetMapIndex(clonedKey, clonedValue)
-	}
-
-	return clonedMap
-}
-
-func isNillable(v reflect.Value) bool {
-	switch v.Kind() {
-	case reflect.Chan, reflect.Interface, reflect.Ptr, reflect.Func:
-		return true
-	}
-	return false
-}
-
-func (c *cloner) clonePtr(v reflect.Value) reflect.Value {
-	if v.IsNil() {
-		return reflect.Zero(v.Type())
-	}
-
-	var newVal reflect.Value
-
-	if v.Elem().CanAddr() {
-		ptrs, exists := c.ptrs[v.Type()]
-		if exists {
-			if newVal, exists := ptrs[v.Elem().UnsafeAddr()]; exists {
-				return newVal
-			}
-		}
-	}
-
-	newVal = c.clone(v.Elem())
-
-	if v.Elem().CanAddr() {
-		ptrs, exists := c.ptrs[v.Type()]
-		if exists {
-			if newVal, exists := ptrs[v.Elem().UnsafeAddr()]; exists {
-				return newVal
-			}
-		}
-	}
-
-	clonedPtr := reflect.New(newVal.Type())
-	clonedPtr.Elem().Set(newVal)
-
-	return clonedPtr
-}
-
-func (c *cloner) cloneStruct(v reflect.Value) reflect.Value {
-	clonedStructPtr := reflect.New(v.Type())
-	clonedStruct := clonedStructPtr.Elem()
-
-	if v.CanAddr() {
-		ptrs := c.ptrs[clonedStructPtr.Type()]
-		if ptrs == nil {
-			ptrs = make(map[uintptr]reflect.Value)
-			c.ptrs[clonedStructPtr.Type()] = ptrs
-		}
-		ptrs[v.UnsafeAddr()] = clonedStructPtr
-	}
-
-	for i := 0; i < v.NumField(); i++ {
-		newStructValue := clonedStruct.Field(i)
-		if !newStructValue.CanSet() {
-			continue
-		}
-
-		clonedVal := c.clone(v.Field(i))
-		if !clonedVal.IsValid() {
-			continue
-		}
-
-		newStructValue.Set(clonedVal.Convert(newStructValue.Type()))
-	}
-
-	return clonedStruct
-}
-
-func setStructField(structObj interface{}, fieldName string, fieldValue interface{}) error {
-	structVal := reflect.ValueOf(structObj).Elem()
-
-	fName := getFieldNameByJsonTag(structObj, fieldName)
-	if fName == "" {
-		return fmt.Errorf("Struct field json tag don't match map key : %s in obj", fieldName)
-	}
-
-	fieldVal := structVal.FieldByName(fName)
-
-	if !fieldVal.IsValid() {
-		return fmt.Errorf("No such field: %s in obj", fieldName)
-	}
-
-	if !fieldVal.CanSet() {
-		return fmt.Errorf("Cannot set %s field value", fieldName)
-	}
-
-	val := reflect.ValueOf(fieldValue)
-
-	if fieldVal.Type() != val.Type() {
-
-		// fix: issue #275
-		if canConvert(fieldValue, fieldVal.Type()) {
-			fieldVal.Set(val.Convert(fieldVal.Type()))
-			return nil
-		}
-
-		if m, ok := fieldValue.(map[string]interface{}); ok {
-
-			if fieldVal.Kind() == reflect.Struct {
-				return MapToStruct(m, fieldVal.Addr().Interface())
-			}
-
-			if fieldVal.Kind() == reflect.Ptr && fieldVal.Type().Elem().Kind() == reflect.Struct {
-				if fieldVal.IsNil() {
-					fieldVal.Set(reflect.New(fieldVal.Type().Elem()))
-				}
-
-				return MapToStruct(m, fieldVal.Interface())
-			}
-
-		}
-
-		return fmt.Errorf("Map value type don't match struct field type")
-	}
-
-	fieldVal.Set(val)
-
-	return nil
-}
-
-func getFieldNameByJsonTag(structObj interface{}, jsonTag string) string {
-	s := reflect.TypeOf(structObj).Elem()
-
-	for i := 0; i < s.NumField(); i++ {
-		field := s.Field(i)
-		tag := field.Tag
-		name := tag.Get("json")
-
-		if name == jsonTag {
-			return field.Name
-		}
-	}
-
-	return ""
-}
-
-func canConvert(value interface{}, targetType reflect.Type) bool {
-	v := reflect.ValueOf(value)
-
-	defer func() {
-		if r := recover(); r != nil {
-		}
-	}()
-	v.Convert(targetType)
-	return true
-}

convertor/convertor_test.go

@@ -1,18 +1,12 @@
 package convertor
 
 import (
-	"encoding/base64"
-	"errors"
 	"fmt"
-	"io"
-	"math/big"
-	"reflect"
+	"strconv"
 	"testing"
-	"unicode/utf8"
-	"unsafe"
 
-	"github.com/duke-git/lancet/internal"
-	"github.com/duke-git/lancet/validator"
+	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/v2/slice"
 )
 
 func TestToChar(t *testing.T) {
@@ -29,6 +23,23 @@ func TestToChar(t *testing.T) {
 	}
 }
 
+func TestToChannel(t *testing.T) {
+	assert := internal.NewAssert(t, "TestToChannel")
+
+	ch := ToChannel([]int{1, 2, 3})
+	val1, _ := <-ch
+	assert.Equal(1, val1)
+
+	val2, _ := <-ch
+	assert.Equal(2, val2)
+
+	val3, _ := <-ch
+	assert.Equal(3, val3)
+
+	_, ok := <-ch
+	assert.Equal(false, ok)
+}
+
 func TestToBool(t *testing.T) {
 	assert := internal.NewAssert(t, "TestToBool")
 
@@ -44,7 +55,7 @@ func TestToBool(t *testing.T) {
 func TestToBytes(t *testing.T) {
 	assert := internal.NewAssert(t, "TestToBytes")
 
-	cases := []interface{}{
+	cases := []any{
 		0,
 		false,
 		"1",
@@ -70,7 +81,7 @@ func TestToBytes(t *testing.T) {
 func TestToInt(t *testing.T) {
 	assert := internal.NewAssert(t, "TestToInt")
 
-	cases := []interface{}{"123", "-123", 123,
+	cases := []any{"123", "-123", 123,
 		uint(123), uint8(123), uint16(123), uint32(123), uint64(123),
 		float32(12.3), float64(12.3),
 		"abc", false, "111111111111111111111111111111111111111"}
@@ -86,7 +97,7 @@ func TestToInt(t *testing.T) {
 func TestToFloat(t *testing.T) {
 	assert := internal.NewAssert(t, "TestToFloat")
 
-	cases := []interface{}{
+	cases := []any{
 		"", "-1", "-.11", "1.23e3", ".123e10", "abc",
 		int(0), int8(1), int16(-1), int32(123), int64(123),
 		uint(123), uint8(123), uint16(123), uint32(123), uint64(123),
@@ -114,7 +125,7 @@ func TestToString(t *testing.T) {
 	}
 	aStruct := TestStruct{Name: "TestStruct"}
 
-	cases := []interface{}{
+	cases := []any{
 		"", nil,
 		int(0), int8(1), int16(-1), int32(123), int64(123),
 		uint(123), uint8(123), uint16(123), uint32(123), uint64(123),
@@ -126,7 +137,7 @@ func TestToString(t *testing.T) {
 		"", "",
 		"0", "1", "-1",
 		"123", "123", "123", "123", "123", "123", "123",
-		"12.3", "12.3",
+		"12.3", "12.300000190734863",
 		"true", "false",
 		"[1,2,3]", "{\"a\":1,\"b\":2,\"c\":3}", "{\"Name\":\"TestStruct\"}", "hello"}
 
@@ -150,6 +161,25 @@ func TestToJson(t *testing.T) {
 	assert.Equal("{\"Name\":\"TestStruct\"}", structJsonStr)
 }
 
+func TestToMap(t *testing.T) {
+	assert := internal.NewAssert(t, "TestToMap")
+
+	type Message struct {
+		name string
+		code int
+	}
+	messages := []Message{
+		{name: "Hello", code: 100},
+		{name: "Hi", code: 101},
+	}
+	result := ToMap(messages, func(msg Message) (int, string) {
+		return msg.code, msg.name
+	})
+	expected := map[int]string{100: "Hello", 101: "Hi"}
+
+	assert.Equal(expected, result)
+}
+
 func TestStructToMap(t *testing.T) {
 	assert := internal.NewAssert(t, "TestStructToMap")
 
@@ -157,17 +187,28 @@ func TestStructToMap(t *testing.T) {
 		Name string `json:"name"`
 		age  int
 	}
-	p := &People{
+	p := People{
 		"test",
 		100,
 	}
 	pm, _ := StructToMap(p)
-	data, _ := StructToMap(p)
-	var expected = map[string]interface{}{
-		"name": "test",
-	}
+
+	expected := map[string]any{"name": "test"}
 	assert.Equal(expected, pm)
-	assert.Equal(expected, data)
+}
+
+func TestMapToSlice(t *testing.T) {
+	assert := internal.NewAssert(t, "TestMapToSlice")
+
+	aMap := map[string]int{"a": 1, "b": 2, "c": 3}
+	result := MapToSlice(aMap, func(key string, value int) string {
+		return key + ":" + strconv.Itoa(value)
+	})
+
+	assert.Equal(3, len(result))
+	assert.Equal(true, slice.Contain(result, "a:1"))
+	assert.Equal(true, slice.Contain(result, "b:2"))
+	assert.Equal(true, slice.Contain(result, "c:3"))
 }
 
 func TestColorHexToRGB(t *testing.T) {
@@ -191,577 +232,9 @@ func TestColorRGBToHex(t *testing.T) {
 	assert.Equal(expected, colorHex)
 }
 
-func TestToChannel(t *testing.T) {
-	assert := internal.NewAssert(t, "TestToChannel")
+func TestToPointer(t *testing.T) {
+	assert := internal.NewAssert(t, "TestToPointer")
+	result := ToPointer(123)
 
-	ch := ToChannel([]interface{}{1, 2, 3})
-	val1, _ := <-ch
-	assert.Equal(1, val1)
-
-	val2, _ := <-ch
-	assert.Equal(2, val2)
-
-	val3, _ := <-ch
-	assert.Equal(3, val3)
-
-	_, ok := <-ch
-	assert.Equal(false, ok)
-}
-
-func TestEncodeByte(t *testing.T) {
-	assert := internal.NewAssert(t, "TestEncodeByte")
-
-	byteData, _ := EncodeByte("abc")
-	expected := []byte{6, 12, 0, 3, 97, 98, 99}
-
-	assert.Equal(expected, byteData)
-}
-
-func TestDecodeByte(t *testing.T) {
-	assert := internal.NewAssert(t, "TestDecodeByte")
-
-	var obj string
-	byteData := []byte{6, 12, 0, 3, 97, 98, 99}
-	DecodeByte(byteData, &obj)
-	assert.Equal("abc", obj)
-}
-
-func TestDeepClone(t *testing.T) {
-	// assert := internal.NewAssert(t, "TestDeepClone")
-
-	type Struct struct {
-		Str        string
-		Int        int
-		Float      float64
-		Bool       bool
-		Nil        interface{}
-		unexported string
-	}
-
-	cases := []interface{}{
-		true,
-		1,
-		0.1,
-		map[string]int{
-			"a": 1,
-			"b": 2,
-		},
-		&Struct{
-			Str:   "test",
-			Int:   1,
-			Float: 0.1,
-			Bool:  true,
-			Nil:   nil,
-			// unexported: "can't be cloned",
-		},
-	}
-
-	for i, item := range cases {
-		cloned := DeepClone(item)
-
-		t.Log(cloned)
-		if &cloned == &item {
-			t.Fatalf("[TestDeepClone case #%d failed]: equal pointer", i)
-		}
-
-		if !reflect.DeepEqual(item, cloned) {
-			t.Fatalf("[TestDeepClone case #%d failed] unequal objects", i)
-		}
-	}
-}
-
-func TestCopyProperties(t *testing.T) {
-	assert := internal.NewAssert(t, "TestCopyProperties")
-
-	type Disk struct {
-		Name    string  `json:"name"`
-		Total   string  `json:"total"`
-		Used    string  `json:"used"`
-		Percent float64 `json:"percent"`
-	}
-
-	type DiskVO struct {
-		Name    string  `json:"name"`
-		Total   string  `json:"total"`
-		Used    string  `json:"used"`
-		Percent float64 `json:"percent"`
-	}
-
-	type Indicator struct {
-		Id      string    `json:"id"`
-		Ip      string    `json:"ip"`
-		UpTime  string    `json:"upTime"`
-		LoadAvg string    `json:"loadAvg"`
-		Cpu     int       `json:"cpu"`
-		Disk    []Disk    `json:"disk"`
-		Stop    chan bool `json:"-"`
-	}
-
-	type IndicatorVO struct {
-		Id      string   `json:"id"`
-		Ip      string   `json:"ip"`
-		UpTime  string   `json:"upTime"`
-		LoadAvg string   `json:"loadAvg"`
-		Cpu     int64    `json:"cpu"`
-		Disk    []DiskVO `json:"disk"`
-	}
-
-	indicator := &Indicator{Id: "001", Ip: "127.0.0.1", Cpu: 1, Disk: []Disk{
-		{Name: "disk-001", Total: "100", Used: "1", Percent: 10},
-		{Name: "disk-002", Total: "200", Used: "1", Percent: 20},
-		{Name: "disk-003", Total: "300", Used: "1", Percent: 30},
-	}}
-
-	indicatorVO := IndicatorVO{}
-
-	err := CopyProperties(&indicatorVO, indicator)
-
-	assert.IsNil(err)
-	assert.Equal("001", indicatorVO.Id)
-	assert.Equal("127.0.0.1", indicatorVO.Ip)
-	assert.Equal(3, len(indicatorVO.Disk))
-}
-
-func TestToInterface(t *testing.T) {
-	assert := internal.NewAssert(t, "TestToInterface")
-
-	cases := []reflect.Value{
-		reflect.ValueOf("abc"),
-		reflect.ValueOf(int(0)), reflect.ValueOf(int8(1)), reflect.ValueOf(int16(-1)), reflect.ValueOf(int32(123)), reflect.ValueOf(int64(123)),
-		reflect.ValueOf(uint(123)), reflect.ValueOf(uint8(123)), reflect.ValueOf(uint16(123)), reflect.ValueOf(uint32(123)), reflect.ValueOf(uint64(123)),
-		reflect.ValueOf(float64(12.3)), reflect.ValueOf(float32(12.3)),
-		reflect.ValueOf(true), reflect.ValueOf(false),
-	}
-
-	expected := []interface{}{
-		"abc",
-		0, int8(1), int16(-1), int32(123), int64(123),
-		uint(123), uint8(123), uint16(123), uint32(123), uint64(123),
-		float64(12.3), float32(12.3),
-		true, false,
-	}
-
-	for i := 0; i < len(cases); i++ {
-		actual, _ := ToInterface(cases[i])
-		assert.Equal(expected[i], actual)
-	}
-
-	nilVal, ok := ToInterface(reflect.ValueOf(nil))
-	assert.EqualValues(nil, nilVal)
-	assert.Equal(false, ok)
-}
-
-func TestUtf8ToGbk(t *testing.T) {
-	assert := internal.NewAssert(t, "TestUtf8ToGbk")
-
-	utf8Data := []byte("hello")
-	gbkData, err := Utf8ToGbk(utf8Data)
-
-	assert.Equal(true, utf8.Valid(utf8Data))
-	assert.Equal(true, validator.IsGBK(gbkData))
-	assert.IsNil(err)
-}
-
-func TestGbkToUtf8(t *testing.T) {
-	assert := internal.NewAssert(t, "TestGbkToUtf8")
-
-	gbkData, err := Utf8ToGbk([]byte("hello"))
-	utf8Data, err := GbkToUtf8(gbkData)
-
-	assert.IsNil(err)
-	assert.Equal(true, utf8.Valid(utf8Data))
-	assert.Equal("hello", string(utf8Data))
-}
-
-func TestMapToStruct(t *testing.T) {
-	t.Parallel()
-
-	assert := internal.NewAssert(t, "TestMapToStruct")
-
-	type Address struct {
-		Street string `json:"street"`
-		Number int    `json:"number"`
-	}
-
-	type Person struct {
-		Name  string   `json:"name"`
-		Age   int      `json:"age"`
-		Phone string   `json:"phone"`
-		Addr  *Address `json:"address"`
-	}
-
-	m := map[string]interface{}{
-		"name":  "Nothin",
-		"age":   28,
-		"phone": "123456789",
-		"address": map[string]interface{}{
-			"street": "test",
-			"number": 1,
-		},
-	}
-
-	var p Person
-	err := MapToStruct(m, &p)
-	assert.IsNil(err)
-	assert.Equal(m["name"], p.Name)
-	assert.Equal(m["age"], p.Age)
-	assert.Equal(m["phone"], p.Phone)
-	assert.Equal("test", p.Addr.Street)
-	assert.Equal(1, p.Addr.Number)
-}
-
-func TestToStdBase64(t *testing.T) {
-	t.Parallel()
-	assert := internal.NewAssert(t, "TestToStdBase64")
-
-	r1 := ToStdBase64("abc")
-	d1, _ := base64.StdEncoding.DecodeString(r1)
-	assert.Equal("abc", string(d1))
-
-	r2 := ToStdBase64([]byte("abc"))
-	d2, _ := base64.StdEncoding.DecodeString(r2)
-	assert.Equal("abc", string(d2))
-
-	r3 := ToStdBase64(123)
-	d3, _ := base64.StdEncoding.DecodeString(r3)
-	assert.Equal("123", string(d3))
-
-	r4 := ToStdBase64(11.11)
-	d4, _ := base64.StdEncoding.DecodeString(r4)
-	assert.Equal("11.11", string(d4))
-
-	r5 := ToStdBase64(map[string]interface{}{"name": "duke", "quantity": 1})
-	d5, _ := base64.StdEncoding.DecodeString(r5)
-	assert.Equal("{\"name\":\"duke\",\"quantity\":1}", string(d5))
-
-	r6 := ToStdBase64([]int64{7, 5, 9, 4, 23})
-	d6, _ := base64.StdEncoding.DecodeString(r6)
-	assert.Equal("[7,5,9,4,23]", string(d6))
-
-	r7 := ToStdBase64([]string{"7", "5", "9", "4", "23"})
-	d7, _ := base64.StdEncoding.DecodeString(r7)
-	assert.Equal("[\"7\",\"5\",\"9\",\"4\",\"23\"]", string(d7))
-
-	r8 := ToStdBase64(nil)
-	d8, _ := base64.StdEncoding.DecodeString(r8)
-	assert.Equal("", string(d8))
-
-	ch := make(chan int, 3)
-	ch <- 1
-	ch <- 2
-	r9 := ToStdBase64(ch)
-	d9, _ := base64.StdEncoding.DecodeString(r9)
-	assert.Equal("", string(d9))
-
-	r10 := ToStdBase64(io.EOF)
-	d10, _ := base64.StdEncoding.DecodeString(r10)
-	assert.Equal("EOF", string(d10))
-
-	r11 := ToStdBase64(errors.New("test"))
-	d11, _ := base64.StdEncoding.DecodeString(r11)
-	assert.Equal("test", string(d11))
-
-	typedNil := (*int)(nil)
-	r12 := ToStdBase64(typedNil)
-	d12, _ := base64.StdEncoding.DecodeString(r12)
-	assert.Equal("", string(d12))
-
-	type nilInterface interface {
-	}
-	var nI nilInterface = nil
-	d13, _ := base64.StdEncoding.DecodeString(ToStdBase64(nI))
-	assert.Equal("", string(d13))
-
-	var p unsafe.Pointer
-	d14, _ := base64.StdEncoding.DecodeString(ToStdBase64(p))
-	assert.Equal("", string(d14))
-}
-
-func TestToUrlBase64(t *testing.T) {
-	t.Parallel()
-	assert := internal.NewAssert(t, "TestToUrlBase64")
-
-	r1 := ToUrlBase64("abc")
-	d1, _ := base64.URLEncoding.DecodeString(r1)
-	assert.Equal("abc", string(d1))
-
-	r2 := ToUrlBase64([]byte("abc"))
-	d2, _ := base64.URLEncoding.DecodeString(r2)
-	assert.Equal("abc", string(d2))
-
-	r3 := ToUrlBase64(123)
-	d3, _ := base64.URLEncoding.DecodeString(r3)
-	assert.Equal("123", string(d3))
-
-	r4 := ToUrlBase64(11.11)
-	d4, _ := base64.URLEncoding.DecodeString(r4)
-	assert.Equal("11.11", string(d4))
-
-	r5 := ToUrlBase64(map[string]interface{}{"name": "duke", "quantity": 1})
-	d5, _ := base64.URLEncoding.DecodeString(r5)
-	assert.Equal("{\"name\":\"duke\",\"quantity\":1}", string(d5))
-
-	r6 := ToUrlBase64([]int64{7, 5, 9, 4, 23})
-	d6, _ := base64.URLEncoding.DecodeString(r6)
-	assert.Equal("[7,5,9,4,23]", string(d6))
-
-	r7 := ToUrlBase64([]string{"7", "5", "9", "4", "23"})
-	d7, _ := base64.URLEncoding.DecodeString(r7)
-	assert.Equal("[\"7\",\"5\",\"9\",\"4\",\"23\"]", string(d7))
-
-	r8 := ToUrlBase64(nil)
-	d8, _ := base64.URLEncoding.DecodeString(r8)
-	assert.Equal("", string(d8))
-
-	ch := make(chan int, 3)
-	ch <- 1
-	ch <- 2
-	r9 := ToUrlBase64(ch)
-	d9, _ := base64.URLEncoding.DecodeString(r9)
-	assert.Equal("", string(d9))
-
-	r10 := ToUrlBase64(io.EOF)
-	d10, _ := base64.URLEncoding.DecodeString(r10)
-	assert.Equal("EOF", string(d10))
-
-	r11 := ToUrlBase64(errors.New("test"))
-	d11, _ := base64.URLEncoding.DecodeString(r11)
-	assert.Equal("test", string(d11))
-
-	typedNil := (*int)(nil)
-	r12 := ToUrlBase64(typedNil)
-	d12, _ := base64.URLEncoding.DecodeString(r12)
-	assert.Equal("", string(d12))
-
-	type nilInterface interface {
-	}
-	var nI nilInterface = nil
-	d13, _ := base64.URLEncoding.DecodeString(ToUrlBase64(nI))
-	assert.Equal("", string(d13))
-
-	var p unsafe.Pointer
-	d14, _ := base64.URLEncoding.DecodeString(ToUrlBase64(p))
-	assert.Equal("", string(d14))
-
-	r15 := ToUrlBase64("4+3/4?=")
-	d15, _ := base64.URLEncoding.DecodeString(r15)
-	assert.Equal("4+3/4?=", string(d15))
-}
-
-func TestToRawStdBase64(t *testing.T) {
-	t.Parallel()
-	assert := internal.NewAssert(t, "TestToRawStdBase64")
-
-	r1 := ToRawStdBase64("abc")
-	d1, _ := base64.RawStdEncoding.DecodeString(r1)
-	assert.Equal("abc", string(d1))
-
-	r2 := ToRawStdBase64([]byte("abc"))
-	d2, _ := base64.RawStdEncoding.DecodeString(r2)
-	assert.Equal("abc", string(d2))
-
-	r3 := ToRawStdBase64(123)
-	d3, _ := base64.RawStdEncoding.DecodeString(r3)
-	assert.Equal("123", string(d3))
-
-	r4 := ToRawStdBase64(11.11)
-	d4, _ := base64.RawStdEncoding.DecodeString(r4)
-	assert.Equal("11.11", string(d4))
-
-	r5 := ToRawStdBase64(map[string]interface{}{"name": "duke", "quantity": 1})
-	d5, _ := base64.RawStdEncoding.DecodeString(r5)
-	assert.Equal("{\"name\":\"duke\",\"quantity\":1}", string(d5))
-
-	r6 := ToRawStdBase64([]int64{7, 5, 9, 4, 23})
-	d6, _ := base64.RawStdEncoding.DecodeString(r6)
-	assert.Equal("[7,5,9,4,23]", string(d6))
-
-	r7 := ToRawStdBase64([]string{"7", "5", "9", "4", "23"})
-	d7, _ := base64.RawStdEncoding.DecodeString(r7)
-	assert.Equal("[\"7\",\"5\",\"9\",\"4\",\"23\"]", string(d7))
-
-	r8 := ToRawStdBase64(nil)
-	d8, _ := base64.RawStdEncoding.DecodeString(r8)
-	assert.Equal("", string(d8))
-
-	ch := make(chan int, 3)
-	ch <- 1
-	ch <- 2
-	r9 := ToRawStdBase64(ch)
-	d9, _ := base64.RawStdEncoding.DecodeString(r9)
-	assert.Equal("", string(d9))
-
-	r10 := ToRawStdBase64(io.EOF)
-	d10, _ := base64.RawStdEncoding.DecodeString(r10)
-	assert.Equal("EOF", string(d10))
-
-	r11 := ToRawStdBase64(errors.New("test"))
-	d11, _ := base64.RawStdEncoding.DecodeString(r11)
-	assert.Equal("test", string(d11))
-
-	typedNil := (*int)(nil)
-	r12 := ToRawStdBase64(typedNil)
-	d12, _ := base64.RawStdEncoding.DecodeString(r12)
-	assert.Equal("", string(d12))
-
-	type nilInterface interface {
-	}
-	var nI nilInterface = nil
-	d13, _ := base64.RawStdEncoding.DecodeString(ToRawStdBase64(nI))
-	assert.Equal("", string(d13))
-
-	var p unsafe.Pointer
-	d14, _ := base64.RawStdEncoding.DecodeString(ToRawStdBase64(p))
-	assert.Equal("", string(d14))
-}
-
-func TestToRawUrlBase64(t *testing.T) {
-	t.Parallel()
-	assert := internal.NewAssert(t, "TestToRawUrlBase64")
-
-	r1 := ToRawUrlBase64("abc")
-	d1, _ := base64.RawURLEncoding.DecodeString(r1)
-	assert.Equal("abc", string(d1))
-
-	r2 := ToRawUrlBase64([]byte("abc"))
-	d2, _ := base64.RawURLEncoding.DecodeString(r2)
-	assert.Equal("abc", string(d2))
-
-	r3 := ToRawUrlBase64(123)
-	d3, _ := base64.RawURLEncoding.DecodeString(r3)
-	assert.Equal("123", string(d3))
-
-	r4 := ToRawUrlBase64(11.11)
-	d4, _ := base64.RawURLEncoding.DecodeString(r4)
-	assert.Equal("11.11", string(d4))
-
-	r5 := ToRawUrlBase64(map[string]interface{}{"name": "duke", "quantity": 1})
-	d5, _ := base64.RawURLEncoding.DecodeString(r5)
-	assert.Equal("{\"name\":\"duke\",\"quantity\":1}", string(d5))
-
-	r6 := ToRawUrlBase64([]int64{7, 5, 9, 4, 23})
-	d6, _ := base64.RawURLEncoding.DecodeString(r6)
-	assert.Equal("[7,5,9,4,23]", string(d6))
-
-	r7 := ToRawUrlBase64([]string{"7", "5", "9", "4", "23"})
-	d7, _ := base64.RawURLEncoding.DecodeString(r7)
-	assert.Equal("[\"7\",\"5\",\"9\",\"4\",\"23\"]", string(d7))
-
-	r8 := ToRawUrlBase64(nil)
-	d8, _ := base64.RawURLEncoding.DecodeString(r8)
-	assert.Equal("", string(d8))
-
-	ch := make(chan int, 3)
-	ch <- 1
-	ch <- 2
-	r9 := ToRawUrlBase64(ch)
-	d9, _ := base64.RawURLEncoding.DecodeString(r9)
-	assert.Equal("", string(d9))
-
-	r10 := ToRawUrlBase64(io.EOF)
-	d10, _ := base64.RawURLEncoding.DecodeString(r10)
-	assert.Equal("EOF", string(d10))
-
-	r11 := ToRawUrlBase64(errors.New("test"))
-	d11, _ := base64.RawURLEncoding.DecodeString(r11)
-	assert.Equal("test", string(d11))
-
-	typedNil := (*int)(nil)
-	r12 := ToRawUrlBase64(typedNil)
-	d12, _ := base64.RawURLEncoding.DecodeString(r12)
-	assert.Equal("", string(d12))
-
-	type nilInterface interface {
-	}
-	var nI nilInterface = nil
-	d13, _ := base64.RawURLEncoding.DecodeString(ToRawUrlBase64(nI))
-	assert.Equal("", string(d13))
-
-	var p unsafe.Pointer
-	d14, _ := base64.RawURLEncoding.DecodeString(ToRawUrlBase64(p))
-	assert.Equal("", string(d14))
-
-	r15 := ToRawUrlBase64("4+3/4?=")
-	d15, _ := base64.RawURLEncoding.DecodeString(r15)
-	assert.Equal("4+3/4?=", string(d15))
-}
-
-func TestToBigInt(t *testing.T) {
-	t.Parallel()
-	assert := internal.NewAssert(t, "TestToBigInt")
-
-	tests := []struct {
-		name   string
-		input  interface{}
-		want   *big.Int
-		hasErr bool
-	}{
-		{
-			name:  "int",
-			input: 42,
-			want:  big.NewInt(42),
-		},
-		{
-			name:  "int8",
-			input: int8(127),
-			want:  big.NewInt(127),
-		},
-		{
-			name:  "int16",
-			input: int16(32000),
-			want:  big.NewInt(32000),
-		},
-		{
-			name:  "int32",
-			input: int32(123456),
-			want:  big.NewInt(123456),
-		},
-		{
-			name:  "int64",
-			input: int64(987654321),
-			want:  big.NewInt(987654321),
-		},
-		{
-			name:  "uint",
-			input: uint(987654321),
-			want:  big.NewInt(987654321),
-		},
-		{
-			name:  "uint8",
-			input: uint8(255),
-			want:  big.NewInt(255),
-		},
-		{
-			name:  "uint16",
-			input: uint16(65535),
-			want:  big.NewInt(65535),
-		},
-		{
-			name:  "uint32",
-			input: uint32(4294967295),
-			want:  big.NewInt(4294967295),
-		},
-		{
-			name:  "uint64",
-			input: uint64(18446744073709551615),
-			want:  new(big.Int).SetUint64(18446744073709551615),
-		},
-		{
-			name:   "unsupported type",
-			input:  3.14, // Unsupported type
-			hasErr: true,
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			got, err := ToBigInt(tt.input)
-			if (err != nil) != tt.hasErr {
-				t.Errorf("ToBigInt() error = %v, hasErr %v", err, tt.hasErr)
-				return
-			}
-
-			assert.Equal(tt.want, got)
-		})
-	}
+	assert.Equal(*result, 123)
 }

cryptor/aes.go

@@ -0,0 +1,174 @@
+// Copyright 2021 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package cryptor implements some util functions to encrypt and decrypt.
+// Note:
+// 1. for aes crypt function, the `key` param length should be 16, 24 or 32. if not, will panic.
+package cryptor
+
+import (
+	"bytes"
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/rand"
+	"io"
+)
+
+// AesEcbEncrypt encrypt data with key use AES ECB algorithm
+// len(key) should be 16, 24 or 32
+func AesEcbEncrypt(data, key []byte) []byte {
+	cipher, _ := aes.NewCipher(generateAesKey(key))
+	length := (len(data) + aes.BlockSize) / aes.BlockSize
+	plain := make([]byte, length*aes.BlockSize)
+	copy(plain, data)
+	pad := byte(len(plain) - len(data))
+	for i := len(data); i < len(plain); i++ {
+		plain[i] = pad
+	}
+	encrypted := make([]byte, len(plain))
+	for bs, be := 0, cipher.BlockSize(); bs <= len(data); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
+		cipher.Encrypt(encrypted[bs:be], plain[bs:be])
+	}
+
+	return encrypted
+}
+
+// AesEcbDecrypt decrypt data with key use AES ECB algorithm
+// len(key) should be 16, 24 or 32
+func AesEcbDecrypt(encrypted, key []byte) []byte {
+	cipher, _ := aes.NewCipher(generateAesKey(key))
+	decrypted := make([]byte, len(encrypted))
+
+	for bs, be := 0, cipher.BlockSize(); bs < len(encrypted); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
+		cipher.Decrypt(decrypted[bs:be], encrypted[bs:be])
+	}
+
+	trim := 0
+	if len(decrypted) > 0 {
+		trim = len(decrypted) - int(decrypted[len(decrypted)-1])
+	}
+
+	return decrypted[:trim]
+}
+
+// AesCbcEncrypt encrypt data with key use AES CBC algorithm
+// len(key) should be 16, 24 or 32
+func AesCbcEncrypt(data, key []byte) []byte {
+	block, _ := aes.NewCipher(key)
+	data = pkcs7Padding(data, block.BlockSize())
+
+	encrypted := make([]byte, aes.BlockSize+len(data))
+	iv := encrypted[:aes.BlockSize]
+	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+		panic(err)
+	}
+
+	mode := cipher.NewCBCEncrypter(block, iv)
+	mode.CryptBlocks(encrypted[aes.BlockSize:], data)
+
+	return encrypted
+}
+
+// AesCbcDecrypt decrypt data with key use AES CBC algorithm
+// len(key) should be 16, 24 or 32
+func AesCbcDecrypt(encrypted, key []byte) []byte {
+	block, _ := aes.NewCipher(key)
+
+	iv := encrypted[:aes.BlockSize]
+	encrypted = encrypted[aes.BlockSize:]
+
+	mode := cipher.NewCBCDecrypter(block, iv)
+	mode.CryptBlocks(encrypted, encrypted)
+
+	decrypted := pkcs7UnPadding(encrypted)
+	return decrypted
+}
+
+// AesCtrCrypt encrypt data with key use AES CTR algorithm
+// len(key) should be 16, 24 or 32
+func AesCtrCrypt(data, key []byte) []byte {
+	block, _ := aes.NewCipher(key)
+
+	iv := bytes.Repeat([]byte("1"), block.BlockSize())
+	stream := cipher.NewCTR(block, iv)
+
+	dst := make([]byte, len(data))
+	stream.XORKeyStream(dst, data)
+
+	return dst
+}
+
+// AesCfbEncrypt encrypt data with key use AES CFB algorithm
+// len(key) should be 16, 24 or 32
+func AesCfbEncrypt(data, key []byte) []byte {
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		panic(err)
+	}
+
+	encrypted := make([]byte, aes.BlockSize+len(data))
+	iv := encrypted[:aes.BlockSize]
+	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+		panic(err)
+	}
+
+	stream := cipher.NewCFBEncrypter(block, iv)
+	stream.XORKeyStream(encrypted[aes.BlockSize:], data)
+	return encrypted
+}
+
+// AesCfbDecrypt decrypt data with key use AES CFB algorithm
+// len(encrypted) should be great than 16, len(key) should be 16, 24 or 32
+func AesCfbDecrypt(encrypted, key []byte) []byte {
+	block, _ := aes.NewCipher(key)
+	if len(encrypted) < aes.BlockSize {
+		panic("encrypted data is too short")
+	}
+	iv := encrypted[:aes.BlockSize]
+	encrypted = encrypted[aes.BlockSize:]
+
+	stream := cipher.NewCFBDecrypter(block, iv)
+	stream.XORKeyStream(encrypted, encrypted)
+	return encrypted
+}
+
+// AesOfbEncrypt encrypt data with key use AES OFB algorithm
+// len(key) should be 16, 24 or 32
+func AesOfbEncrypt(data, key []byte) []byte {
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		panic(err)
+	}
+	data = pkcs7Padding(data, aes.BlockSize)
+	encrypted := make([]byte, aes.BlockSize+len(data))
+	iv := encrypted[:aes.BlockSize]
+	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+		panic(err)
+	}
+
+	stream := cipher.NewOFB(block, iv)
+	stream.XORKeyStream(encrypted[aes.BlockSize:], data)
+	return encrypted
+}
+
+// AesOfbDecrypt decrypt data with key use AES OFB algorithm
+// len(key) should be 16, 24 or 32
+func AesOfbDecrypt(data, key []byte) []byte {
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		panic(err)
+	}
+
+	iv := data[:aes.BlockSize]
+	data = data[aes.BlockSize:]
+	if len(data)%aes.BlockSize != 0 {
+		return nil
+	}
+
+	decrypted := make([]byte, len(data))
+	mode := cipher.NewOFB(block, iv)
+	mode.XORKeyStream(decrypted, data)
+
+	decrypted = pkcs7UnPadding(decrypted)
+	return decrypted
+}

cryptor/aes_test.go

@@ -0,0 +1,62 @@
+package cryptor
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestAesEcbEncrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefghijklmnop"
+
+	aesEcbEncrypt := AesEcbEncrypt([]byte(data), []byte(key))
+	aesEcbDecrypt := AesEcbDecrypt(aesEcbEncrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestAesEcbEncrypt")
+	assert.Equal(data, string(aesEcbDecrypt))
+}
+
+func TestAesCbcEncrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefghijklmnop"
+
+	aesCbcEncrypt := AesCbcEncrypt([]byte(data), []byte(key))
+	aesCbcDecrypt := AesCbcDecrypt(aesCbcEncrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestAesCbcEncrypt")
+	assert.Equal(data, string(aesCbcDecrypt))
+}
+
+func TestAesCtrCrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefghijklmnop"
+
+	aesCtrCrypt := AesCtrCrypt([]byte(data), []byte(key))
+	aesCtrDeCrypt := AesCtrCrypt(aesCtrCrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestAesCtrCrypt")
+	assert.Equal(data, string(aesCtrDeCrypt))
+}
+
+func TestAesCfbEncrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefghijklmnop"
+
+	aesCfbEncrypt := AesCfbEncrypt([]byte(data), []byte(key))
+	aesCfbDecrypt := AesCfbDecrypt(aesCfbEncrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestAesCfbEncrypt")
+	assert.Equal(data, string(aesCfbDecrypt))
+}
+
+func TestAesOfbEncrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefghijklmnop"
+
+	aesOfbEncrypt := AesOfbEncrypt([]byte(data), []byte(key))
+	aesOfbDecrypt := AesOfbDecrypt(aesOfbEncrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestAesOfbEncrypt")
+	assert.Equal(data, string(aesOfbDecrypt))
+}

cryptor/basic.go

@@ -37,27 +37,6 @@ func Md5String(s string) string {
 	return hex.EncodeToString(h.Sum(nil))
 }
 
-// Md5StringWithBase64 return the md5 value of string with base64.
-func Md5StringWithBase64(s string) string {
-	h := md5.New()
-	h.Write([]byte(s))
-	return base64.StdEncoding.EncodeToString(h.Sum(nil))
-}
-
-// Md5Byte return the md5 string of byte slice.
-func Md5Byte(data []byte) string {
-	h := md5.New()
-	h.Write(data)
-	return hex.EncodeToString(h.Sum(nil))
-}
-
-// Md5ByteWithBase64 return the md5 string of byte slice with base64.
-func Md5ByteWithBase64(data []byte) string {
-	h := md5.New()
-	h.Write(data)
-	return base64.StdEncoding.EncodeToString(h.Sum(nil))
-}
-
 // Md5File return the md5 value of file
 func Md5File(filename string) (string, error) {
 	if fileInfo, err := os.Stat(filename); err != nil {
@@ -97,13 +76,6 @@ func HmacMd5(data, key string) string {
 	return hex.EncodeToString(h.Sum([]byte("")))
 }
 
-// HmacMd5WithBase64 return the hmac hash of string use md5 with base64.
-func HmacMd5WithBase64(data, key string) string {
-	h := hmac.New(md5.New, []byte(key))
-	h.Write([]byte(data))
-	return base64.StdEncoding.EncodeToString(h.Sum([]byte("")))
-}
-
 // HmacSha1 return the hmac hash of string use sha1
 func HmacSha1(data, key string) string {
 	h := hmac.New(sha1.New, []byte(key))
@@ -111,13 +83,6 @@ func HmacSha1(data, key string) string {
 	return hex.EncodeToString(h.Sum([]byte("")))
 }
 
-// HmacSha1WithBase64 return the hmac hash of string use sha1 with base64.
-func HmacSha1WithBase64(str, key string) string {
-	h := hmac.New(sha1.New, []byte(key))
-	h.Write([]byte(str))
-	return base64.StdEncoding.EncodeToString(h.Sum([]byte("")))
-}
-
 // HmacSha256 return the hmac hash of string use sha256
 func HmacSha256(data, key string) string {
 	h := hmac.New(sha256.New, []byte(key))
@@ -125,13 +90,6 @@ func HmacSha256(data, key string) string {
 	return hex.EncodeToString(h.Sum([]byte("")))
 }
 
-// HmacSha256WithBase64 return the hmac hash of string use sha256 with base64.
-func HmacSha256WithBase64(str, key string) string {
-	h := hmac.New(sha256.New, []byte(key))
-	h.Write([]byte(str))
-	return base64.StdEncoding.EncodeToString(h.Sum([]byte("")))
-}
-
 // HmacSha512 return the hmac hash of string use sha512
 func HmacSha512(data, key string) string {
 	h := hmac.New(sha512.New, []byte(key))
@@ -139,13 +97,6 @@ func HmacSha512(data, key string) string {
 	return hex.EncodeToString(h.Sum([]byte("")))
 }
 
-// HmacSha512WithBase64 return the hmac hash of string use sha512 with base64.
-func HmacSha512WithBase64(str, key string) string {
-	h := hmac.New(sha512.New, []byte(key))
-	h.Write([]byte(str))
-	return base64.StdEncoding.EncodeToString(h.Sum([]byte("")))
-}
-
 // Sha1 return the sha1 value (SHA-1 hash algorithm) of string
 func Sha1(data string) string {
 	sha1 := sha1.New()
@@ -153,13 +104,6 @@ func Sha1(data string) string {
 	return hex.EncodeToString(sha1.Sum([]byte("")))
 }
 
-// Sha1WithBase64 return the sha1 value (SHA-1 hash algorithm) of base64 string.
-func Sha1WithBase64(str string) string {
-	sha1 := sha1.New()
-	sha1.Write([]byte(str))
-	return base64.StdEncoding.EncodeToString(sha1.Sum([]byte("")))
-}
-
 // Sha256 return the sha256 value (SHA256 hash algorithm) of string
 func Sha256(data string) string {
 	sha256 := sha256.New()
@@ -167,23 +111,9 @@ func Sha256(data string) string {
 	return hex.EncodeToString(sha256.Sum([]byte("")))
 }
 
-// Sha256WithBase64 return the sha256 value (SHA256 hash algorithm) of base64 string.
-func Sha256WithBase64(str string) string {
-	sha256 := sha256.New()
-	sha256.Write([]byte(str))
-	return base64.StdEncoding.EncodeToString(sha256.Sum([]byte("")))
-}
-
 // Sha512 return the sha512 value (SHA512 hash algorithm) of string
 func Sha512(data string) string {
 	sha512 := sha512.New()
 	sha512.Write([]byte(data))
 	return hex.EncodeToString(sha512.Sum([]byte("")))
 }
-
-// Sha512WithBase64 return the sha512 value (SHA512 hash algorithm) of base64 string.
-func Sha512WithBase64(str string) string {
-	sha512 := sha512.New()
-	sha512.Write([]byte(str))
-	return base64.StdEncoding.EncodeToString(sha512.Sum([]byte("")))
-}

cryptor/basic_test.go

@@ -3,7 +3,7 @@ package cryptor
 import (
 	"testing"
 
-	"github.com/duke-git/lancet/internal"
+	"github.com/duke-git/lancet/v2/internal"
 )
 
 func TestBase64StdEncode(t *testing.T) {
@@ -21,22 +21,6 @@ func TestMd5String(t *testing.T) {
 	assert.Equal("5d41402abc4b2a76b9719d911017c592", Md5String("hello"))
 }
 
-func TestMd5StringWithBase64(t *testing.T) {
-	assert := internal.NewAssert(t, "TestMd5StringWithBase64")
-	assert.Equal("XUFAKrxLKna5cZ2REBfFkg==", Md5StringWithBase64("hello"))
-}
-
-func TestMd5Byte(t *testing.T) {
-	assert := internal.NewAssert(t, "TestMd5Byte")
-	data := []byte{'a'}
-	assert.Equal("0cc175b9c0f1b6a831c399e269772661", Md5Byte(data))
-}
-
-func TestMd5ByteWithBase64(t *testing.T) {
-	assert := internal.NewAssert(t, "TestMd5ByteWithBase64")
-	assert.Equal("XUFAKrxLKna5cZ2REBfFkg==", Md5ByteWithBase64([]byte("hello")))
-}
-
 func TestMd5File(t *testing.T) {
 	fileMd5, err := Md5File("./basic.go")
 	assert := internal.NewAssert(t, "TestMd5File")
@@ -49,11 +33,6 @@ func TestHmacMd5(t *testing.T) {
 	assert.Equal("5f4c9faaff0a1ad3007d9ddc06abe36d", HmacMd5("hello world", "12345"))
 }
 
-func TestHmacMd5WithBase64(t *testing.T) {
-	assert := internal.NewAssert(t, "TestHmacMd5WithBase64")
-	assert.Equal("6DQwbquJLYclJdSRinpjmg==", HmacMd5WithBase64("hello", "12345"))
-}
-
 func TestHmacSha1(t *testing.T) {
 	s := "hello world"
 	key := "12345"
@@ -64,16 +43,6 @@ func TestHmacSha1(t *testing.T) {
 	assert.Equal(expected, hmacSha1)
 }
 
-func TestHmacSha1WithBase64(t *testing.T) {
-	s := "hello"
-	key := "12345"
-	hmacSha1 := HmacSha1WithBase64(s, key)
-	expected := "XGqdsMzLkuNu0DI/0Jt/k23prOA="
-
-	assert := internal.NewAssert(t, "TestHmacSha1")
-	assert.Equal(expected, hmacSha1)
-}
-
 func TestHmacSha256(t *testing.T) {
 	s := "hello world"
 	key := "12345"
@@ -84,16 +53,6 @@ func TestHmacSha256(t *testing.T) {
 	assert.Equal(expected, hmacSha256)
 }
 
-func TestHmacSha256WithBase64(t *testing.T) {
-	str := "hello"
-	key := "12345"
-	hms := HmacSha256WithBase64(str, key)
-	expected := "MVu5PE6YmGK6Ccti4F1zpfN2yzbw14btqwwyDQWf3nU="
-
-	assert := internal.NewAssert(t, "TestHmacSha256WithBase64")
-	assert.Equal(expected, hms)
-}
-
 func TestHmacSha512(t *testing.T) {
 	s := "hello world"
 	key := "12345"
@@ -104,16 +63,6 @@ func TestHmacSha512(t *testing.T) {
 	assert.Equal(expected, hmacSha512)
 }
 
-func TestHmacSha512WithBase64(t *testing.T) {
-	str := "hello"
-	key := "12345"
-	hms := HmacSha512WithBase64(str, key)
-	expected := "3Y8SkKndI9NU4lJtmi6c6M///dN8syCADRxsE9Lvw2Mog3ahlsVFja9T+OGqa0Wm2FYwPVwKIGS/+XhYYdSM/A=="
-
-	assert := internal.NewAssert(t, "TestHmacSha512WithBase64")
-	assert.Equal(expected, hms)
-}
-
 func TestSha1(t *testing.T) {
 	s := "hello world"
 	sha1 := Sha1(s)
@@ -123,14 +72,6 @@ func TestSha1(t *testing.T) {
 	assert.Equal(expected, sha1)
 }
 
-func TestSha1WithBase64(t *testing.T) {
-	str := Sha1WithBase64("hello")
-	expected := "qvTGHdzF6KLavt4PO0gs2a6pQ00="
-
-	assert := internal.NewAssert(t, "TestSha1WithBase64")
-	assert.Equal(expected, str)
-}
-
 func TestSha256(t *testing.T) {
 	s := "hello world"
 	sha256 := Sha256(s)
@@ -140,14 +81,6 @@ func TestSha256(t *testing.T) {
 	assert.Equal(expected, sha256)
 }
 
-func TestSha256WithBase64(t *testing.T) {
-	str := Sha256WithBase64("hello")
-	expected := "LPJNul+wow4m6DsqxbninhsWHlwfp0JecwQzYpOLmCQ="
-
-	assert := internal.NewAssert(t, "TestSha256WithBase64")
-	assert.Equal(expected, str)
-}
-
 func TestSha512(t *testing.T) {
 	s := "hello world"
 	sha512 := Sha512(s)
@@ -156,11 +89,3 @@ func TestSha512(t *testing.T) {
 	assert := internal.NewAssert(t, "TestSha512")
 	assert.Equal(expected, sha512)
 }
-
-func TestSha512WithBase64(t *testing.T) {
-	str := Sha512WithBase64("hello")
-	expected := "m3HSJL1i83hdltRq0+o9czGb+8KJDKra4t/3JRlnPKcjI8PZm6XBHXx6zG4UuMXaDEZjR1wuXDre9G9zvN7AQw=="
-
-	assert := internal.NewAssert(t, "TestSha512WithBase64")
-	assert.Equal(expected, str)
-}

cryptor/crypto.go

@@ -1,490 +0,0 @@
-// Copyright 2021 dudaodong@gmail.com. All rights reserved.
-// Use of this source code is governed by MIT license
-
-// Package cryptor implements some util functions to encrypt and decrypt.
-// Note:
-// 1. for aes crypt function, the `key` param length should be 16, 24 or 32. if not, will panic.
-package cryptor
-
-import (
-	"bytes"
-	"crypto/aes"
-	"crypto/cipher"
-	"crypto/des"
-	"crypto/rand"
-	"crypto/rsa"
-	"crypto/sha256"
-	"crypto/x509"
-	"encoding/pem"
-	"io"
-	"os"
-)
-
-// AesEcbEncrypt encrypt data with key use AES ECB algorithm
-// len(key) should be 16, 24 or 32
-func AesEcbEncrypt(data, key []byte) []byte {
-	size := len(key)
-	if size != 16 && size != 24 && size != 32 {
-		panic("key length shoud be 16 or 24 or 32")
-	}
-
-	cipher, _ := aes.NewCipher(generateAesKey(key, size))
-	length := (len(data) + aes.BlockSize) / aes.BlockSize
-
-	plain := make([]byte, length*aes.BlockSize)
-
-	copy(plain, data)
-
-	pad := byte(len(plain) - len(data))
-	for i := len(data); i < len(plain); i++ {
-		plain[i] = pad
-	}
-
-	encrypted := make([]byte, len(plain))
-	for bs, be := 0, cipher.BlockSize(); bs <= len(data); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
-		cipher.Encrypt(encrypted[bs:be], plain[bs:be])
-	}
-
-	return encrypted
-}
-
-// AesEcbDecrypt decrypt data with key use AES ECB algorithm
-// len(key) should be 16, 24 or 32
-func AesEcbDecrypt(encrypted, key []byte) []byte {
-	size := len(key)
-	if size != 16 && size != 24 && size != 32 {
-		panic("key length shoud be 16 or 24 or 32")
-	}
-
-	cipher, _ := aes.NewCipher(generateAesKey(key, size))
-	decrypted := make([]byte, len(encrypted))
-
-	for bs, be := 0, cipher.BlockSize(); bs < len(encrypted); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
-		cipher.Decrypt(decrypted[bs:be], encrypted[bs:be])
-	}
-
-	trim := 0
-	if len(decrypted) > 0 {
-		trim = len(decrypted) - int(decrypted[len(decrypted)-1])
-	}
-
-	return decrypted[:trim]
-}
-
-// AesCbcEncrypt encrypt data with key use AES CBC algorithm
-// len(key) should be 16, 24 or 32
-func AesCbcEncrypt(data, key []byte) []byte {
-	block, _ := aes.NewCipher(key)
-	data = pkcs7Padding(data, block.BlockSize())
-
-	encrypted := make([]byte, aes.BlockSize+len(data))
-	iv := encrypted[:aes.BlockSize]
-	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-		panic(err)
-	}
-
-	mode := cipher.NewCBCEncrypter(block, iv)
-	mode.CryptBlocks(encrypted[aes.BlockSize:], data)
-
-	return encrypted
-}
-
-// AesCbcDecrypt decrypt data with key use AES CBC algorithm
-// len(key) should be 16, 24 or 32
-func AesCbcDecrypt(encrypted, key []byte) []byte {
-	block, _ := aes.NewCipher(key)
-
-	iv := encrypted[:aes.BlockSize]
-	encrypted = encrypted[aes.BlockSize:]
-
-	mode := cipher.NewCBCDecrypter(block, iv)
-	mode.CryptBlocks(encrypted, encrypted)
-
-	decrypted := pkcs7UnPadding(encrypted)
-	return decrypted
-}
-
-// AesCtrCrypt encrypt data with key use AES CTR algorithm
-// len(key) should be 16, 24 or 32
-func AesCtrCrypt(data, key []byte) []byte {
-	block, _ := aes.NewCipher(key)
-
-	iv := bytes.Repeat([]byte("1"), block.BlockSize())
-	stream := cipher.NewCTR(block, iv)
-
-	dst := make([]byte, len(data))
-	stream.XORKeyStream(dst, data)
-
-	return dst
-}
-
-// AesCfbEncrypt encrypt data with key use AES CFB algorithm
-// len(key) should be 16, 24 or 32
-func AesCfbEncrypt(data, key []byte) []byte {
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-
-	encrypted := make([]byte, aes.BlockSize+len(data))
-	iv := encrypted[:aes.BlockSize]
-	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-		panic(err)
-	}
-
-	stream := cipher.NewCFBEncrypter(block, iv)
-	stream.XORKeyStream(encrypted[aes.BlockSize:], data)
-	return encrypted
-}
-
-// AesCfbDecrypt decrypt data with key use AES CFB algorithm
-// len(encrypted) should be great than 16, len(key) should be 16, 24 or 32
-func AesCfbDecrypt(encrypted, key []byte) []byte {
-	block, _ := aes.NewCipher(key)
-	if len(encrypted) < aes.BlockSize {
-		panic("encrypted data is too short")
-	}
-	iv := encrypted[:aes.BlockSize]
-	encrypted = encrypted[aes.BlockSize:]
-
-	stream := cipher.NewCFBDecrypter(block, iv)
-	stream.XORKeyStream(encrypted, encrypted)
-	return encrypted
-}
-
-// AesOfbEncrypt encrypt data with key use AES OFB algorithm
-// len(key) should be 16, 24 or 32
-func AesOfbEncrypt(data, key []byte) []byte {
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-	data = pkcs7Padding(data, aes.BlockSize)
-	encrypted := make([]byte, aes.BlockSize+len(data))
-	iv := encrypted[:aes.BlockSize]
-	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-		panic(err)
-	}
-
-	stream := cipher.NewOFB(block, iv)
-	stream.XORKeyStream(encrypted[aes.BlockSize:], data)
-	return encrypted
-}
-
-// AesOfbDecrypt decrypt data with key use AES OFB algorithm
-// len(key) should be 16, 24 or 32
-func AesOfbDecrypt(data, key []byte) []byte {
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-
-	iv := data[:aes.BlockSize]
-	data = data[aes.BlockSize:]
-	if len(data)%aes.BlockSize != 0 {
-		return nil
-	}
-
-	decrypted := make([]byte, len(data))
-	mode := cipher.NewOFB(block, iv)
-	mode.XORKeyStream(decrypted, data)
-
-	decrypted = pkcs7UnPadding(decrypted)
-	return decrypted
-}
-
-// DesEcbEncrypt encrypt data with key use DES ECB algorithm
-// len(key) should be 8
-func DesEcbEncrypt(data, key []byte) []byte {
-	cipher, _ := des.NewCipher(generateDesKey(key))
-	length := (len(data) + des.BlockSize) / des.BlockSize
-	plain := make([]byte, length*des.BlockSize)
-	copy(plain, data)
-
-	pad := byte(len(plain) - len(data))
-	for i := len(data); i < len(plain); i++ {
-		plain[i] = pad
-	}
-
-	encrypted := make([]byte, len(plain))
-	for bs, be := 0, cipher.BlockSize(); bs <= len(data); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
-		cipher.Encrypt(encrypted[bs:be], plain[bs:be])
-	}
-
-	return encrypted
-}
-
-// DesEcbDecrypt decrypt data with key use DES ECB algorithm
-// len(key) should be 8
-func DesEcbDecrypt(encrypted, key []byte) []byte {
-	cipher, _ := des.NewCipher(generateDesKey(key))
-	decrypted := make([]byte, len(encrypted))
-
-	for bs, be := 0, cipher.BlockSize(); bs < len(encrypted); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
-		cipher.Decrypt(decrypted[bs:be], encrypted[bs:be])
-	}
-
-	trim := 0
-	if len(decrypted) > 0 {
-		trim = len(decrypted) - int(decrypted[len(decrypted)-1])
-	}
-
-	return decrypted[:trim]
-}
-
-// DesCbcEncrypt encrypt data with key use DES CBC algorithm
-// len(key) should be 8
-func DesCbcEncrypt(data, key []byte) []byte {
-	block, _ := des.NewCipher(key)
-	data = pkcs7Padding(data, block.BlockSize())
-
-	encrypted := make([]byte, des.BlockSize+len(data))
-	iv := encrypted[:des.BlockSize]
-	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-		panic(err)
-	}
-
-	mode := cipher.NewCBCEncrypter(block, iv)
-	mode.CryptBlocks(encrypted[des.BlockSize:], data)
-
-	return encrypted
-}
-
-// DesCbcDecrypt decrypt data with key use DES CBC algorithm
-// len(key) should be 8
-func DesCbcDecrypt(encrypted, key []byte) []byte {
-	block, _ := des.NewCipher(key)
-
-	iv := encrypted[:des.BlockSize]
-	encrypted = encrypted[des.BlockSize:]
-
-	mode := cipher.NewCBCDecrypter(block, iv)
-	mode.CryptBlocks(encrypted, encrypted)
-
-	decrypted := pkcs7UnPadding(encrypted)
-	return decrypted
-}
-
-// DesCtrCrypt encrypt data with key use DES CTR algorithm
-// len(key) should be 8
-func DesCtrCrypt(data, key []byte) []byte {
-	block, _ := des.NewCipher(key)
-
-	iv := bytes.Repeat([]byte("1"), block.BlockSize())
-	stream := cipher.NewCTR(block, iv)
-
-	dst := make([]byte, len(data))
-	stream.XORKeyStream(dst, data)
-
-	return dst
-}
-
-// DesCfbEncrypt encrypt data with key use DES CFB algorithm
-// len(key) should be 8
-func DesCfbEncrypt(data, key []byte) []byte {
-	block, err := des.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-
-	encrypted := make([]byte, des.BlockSize+len(data))
-	iv := encrypted[:des.BlockSize]
-	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-		panic(err)
-	}
-
-	stream := cipher.NewCFBEncrypter(block, iv)
-	stream.XORKeyStream(encrypted[des.BlockSize:], data)
-
-	return encrypted
-}
-
-// DesCfbDecrypt decrypt data with key use DES CFB algorithm
-// len(encrypted) should be great than 16, len(key) should be 8
-func DesCfbDecrypt(encrypted, key []byte) []byte {
-	block, _ := des.NewCipher(key)
-	if len(encrypted) < des.BlockSize {
-		panic("encrypted data is too short")
-	}
-	iv := encrypted[:des.BlockSize]
-	encrypted = encrypted[des.BlockSize:]
-
-	stream := cipher.NewCFBDecrypter(block, iv)
-	stream.XORKeyStream(encrypted, encrypted)
-
-	return encrypted
-}
-
-// DesOfbEncrypt encrypt data with key use DES OFB algorithm
-// len(key) should be 16, 24 or 32
-func DesOfbEncrypt(data, key []byte) []byte {
-	block, err := des.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-	data = pkcs7Padding(data, des.BlockSize)
-	encrypted := make([]byte, des.BlockSize+len(data))
-	iv := encrypted[:des.BlockSize]
-	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-		panic(err)
-	}
-
-	stream := cipher.NewOFB(block, iv)
-	stream.XORKeyStream(encrypted[des.BlockSize:], data)
-
-	return encrypted
-}
-
-// DesOfbDecrypt decrypt data with key use DES OFB algorithm
-// len(key) should be 8
-func DesOfbDecrypt(data, key []byte) []byte {
-	block, err := des.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-
-	iv := data[:des.BlockSize]
-	data = data[des.BlockSize:]
-	if len(data)%des.BlockSize != 0 {
-		return nil
-	}
-
-	decrypted := make([]byte, len(data))
-	mode := cipher.NewOFB(block, iv)
-	mode.XORKeyStream(decrypted, data)
-
-	decrypted = pkcs7UnPadding(decrypted)
-
-	return decrypted
-}
-
-// GenerateRsaKey make  a rsa private key, and return key file name
-// Generated key file is `rsa_private.pem` and `rsa_public.pem` in current path
-func GenerateRsaKey(keySize int, priKeyFile, pubKeyFile string) error {
-	// private key
-	privateKey, err := rsa.GenerateKey(rand.Reader, keySize)
-	if err != nil {
-		return err
-	}
-
-	derText := x509.MarshalPKCS1PrivateKey(privateKey)
-
-	block := pem.Block{
-		Type:  "rsa private key",
-		Bytes: derText,
-	}
-
-	//file,err := os.Create("rsa_private.pem")
-	file, err := os.Create(priKeyFile)
-	if err != nil {
-		panic(err)
-	}
-	pem.Encode(file, &block)
-	file.Close()
-
-	// public key
-	publicKey := privateKey.PublicKey
-
-	derpText, err := x509.MarshalPKIXPublicKey(&publicKey)
-	if err != nil {
-		return err
-	}
-
-	block = pem.Block{
-		Type:  "rsa public key",
-		Bytes: derpText,
-	}
-
-	//file,err = os.Create("rsa_public.pem")
-	file, err = os.Create(pubKeyFile)
-	if err != nil {
-		return err
-	}
-	pem.Encode(file, &block)
-	file.Close()
-
-	return nil
-}
-
-// RsaEncrypt encrypt data with ras algorithm
-func RsaEncrypt(data []byte, pubKeyFileName string) []byte {
-	file, err := os.Open(pubKeyFileName)
-	if err != nil {
-		panic(err)
-	}
-	fileInfo, err := file.Stat()
-	if err != nil {
-		panic(err)
-	}
-	defer file.Close()
-	buf := make([]byte, fileInfo.Size())
-	file.Read(buf)
-
-	block, _ := pem.Decode(buf)
-
-	pubInterface, err := x509.ParsePKIXPublicKey(block.Bytes)
-	if err != nil {
-		panic(err)
-	}
-	pubKey := pubInterface.(*rsa.PublicKey)
-
-	cipherText, err := rsa.EncryptPKCS1v15(rand.Reader, pubKey, data)
-	if err != nil {
-		panic(err)
-	}
-	return cipherText
-}
-
-// RsaDecrypt decrypt data with ras algorithm
-func RsaDecrypt(data []byte, privateKeyFileName string) []byte {
-	file, err := os.Open(privateKeyFileName)
-	if err != nil {
-		panic(err)
-	}
-	fileInfo, err := file.Stat()
-	if err != nil {
-		panic(err)
-	}
-	buf := make([]byte, fileInfo.Size())
-	defer file.Close()
-	file.Read(buf)
-
-	block, _ := pem.Decode(buf)
-
-	priKey, err := x509.ParsePKCS1PrivateKey(block.Bytes)
-	if err != nil {
-		panic(err)
-	}
-
-	plainText, err := rsa.DecryptPKCS1v15(rand.Reader, priKey, data)
-	if err != nil {
-		panic(err)
-	}
-	return plainText
-}
-
-// GenerateRsaKeyPair create rsa private and public key.
-func GenerateRsaKeyPair(keySize int) (*rsa.PrivateKey, *rsa.PublicKey) {
-	privateKey, _ := rsa.GenerateKey(rand.Reader, keySize)
-	return privateKey, &privateKey.PublicKey
-}
-
-// RsaEncryptOAEP encrypts the given data with RSA-OAEP.
-func RsaEncryptOAEP(data []byte, label []byte, key rsa.PublicKey) ([]byte, error) {
-	encryptedBytes, err := rsa.EncryptOAEP(sha256.New(), rand.Reader, &key, data, label)
-	if err != nil {
-		return nil, err
-	}
-
-	return encryptedBytes, nil
-}
-
-// RsaDecryptOAEP decrypts the data with RSA-OAEP.
-func RsaDecryptOAEP(ciphertext []byte, label []byte, key rsa.PrivateKey) ([]byte, error) {
-	decryptedBytes, err := rsa.DecryptOAEP(sha256.New(), rand.Reader, &key, ciphertext, label)
-	if err != nil {
-		return nil, err
-	}
-
-	return decryptedBytes, nil
-}

cryptor/crypto_internal.go

@@ -2,15 +2,15 @@ package cryptor
 
 import "bytes"
 
-func generateAesKey(key []byte, size int) []byte {
-	aesKey := make([]byte, size)
-	copy(aesKey, key)
-	for i := size; i < len(key); {
-		for j := 0; j < size && i < len(key); j, i = j+1, i+1 {
-			aesKey[j] ^= key[i]
+func generateAesKey(key []byte) []byte {
+	genKey := make([]byte, 16)
+	copy(genKey, key)
+	for i := 16; i < len(key); {
+		for j := 0; j < 16 && i < len(key); j, i = j+1, i+1 {
+			genKey[j] ^= key[i]
 		}
 	}
-	return aesKey
+	return genKey
 }
 
 func generateDesKey(key []byte) []byte {

cryptor/crypto_test.go

@@ -1,148 +0,0 @@
-package cryptor
-
-import (
-	"testing"
-
-	"github.com/duke-git/lancet/internal"
-)
-
-func TestAesEcbEncrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefghijklmnop"
-
-	aesEcbEncrypt := AesEcbEncrypt([]byte(data), []byte(key))
-	aesEcbDecrypt := AesEcbDecrypt(aesEcbEncrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestAesEcbEncrypt")
-	assert.Equal(data, string(aesEcbDecrypt))
-}
-
-func TestAesCbcEncrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefghijklmnop"
-
-	aesCbcEncrypt := AesCbcEncrypt([]byte(data), []byte(key))
-	aesCbcDecrypt := AesCbcDecrypt(aesCbcEncrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestAesCbcEncrypt")
-	assert.Equal(data, string(aesCbcDecrypt))
-}
-
-func TestAesCtrCrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefghijklmnop"
-
-	aesCtrCrypt := AesCtrCrypt([]byte(data), []byte(key))
-	aesCtrDeCrypt := AesCtrCrypt(aesCtrCrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestAesCtrCrypt")
-	assert.Equal(data, string(aesCtrDeCrypt))
-}
-
-func TestAesCfbEncrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefghijklmnop"
-
-	aesCfbEncrypt := AesCfbEncrypt([]byte(data), []byte(key))
-	aesCfbDecrypt := AesCfbDecrypt(aesCfbEncrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestAesCfbEncrypt")
-	assert.Equal(data, string(aesCfbDecrypt))
-}
-
-func TestAesOfbEncrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefghijklmnop"
-
-	aesOfbEncrypt := AesOfbEncrypt([]byte(data), []byte(key))
-	aesOfbDecrypt := AesOfbDecrypt(aesOfbEncrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestAesOfbEncrypt")
-	assert.Equal(data, string(aesOfbDecrypt))
-}
-
-func TestDesEcbEncrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefgh"
-
-	desEcbEncrypt := DesEcbEncrypt([]byte(data), []byte(key))
-	desEcbDecrypt := DesEcbDecrypt(desEcbEncrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestDesEcbEncrypt")
-	assert.Equal(data, string(desEcbDecrypt))
-}
-
-func TestDesCbcEncrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefgh"
-
-	desCbcEncrypt := DesCbcEncrypt([]byte(data), []byte(key))
-	desCbcDecrypt := DesCbcDecrypt(desCbcEncrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestDesCbcEncrypt")
-	assert.Equal(data, string(desCbcDecrypt))
-}
-
-func TestDesCtrCrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefgh"
-
-	desCtrCrypt := DesCtrCrypt([]byte(data), []byte(key))
-	desCtrDeCrypt := DesCtrCrypt(desCtrCrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestDesCtrCrypt")
-	assert.Equal(data, string(desCtrDeCrypt))
-}
-
-func TestDesCfbEncrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefgh"
-
-	desCfbEncrypt := DesCfbEncrypt([]byte(data), []byte(key))
-	desCfbDecrypt := DesCfbDecrypt(desCfbEncrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestDesCfbEncrypt")
-	assert.Equal(data, string(desCfbDecrypt))
-}
-
-func TestDesOfbEncrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefgh"
-
-	desOfbEncrypt := DesOfbEncrypt([]byte(data), []byte(key))
-	desOfbDecrypt := DesOfbDecrypt(desOfbEncrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestDesOfbEncrypt")
-	assert.Equal(data, string(desOfbDecrypt))
-}
-
-func TestRsaEncrypt(t *testing.T) {
-	err := GenerateRsaKey(4096, "rsa_private.pem", "rsa_public.pem")
-	if err != nil {
-		t.FailNow()
-	}
-	data := []byte("hello world")
-	encrypted := RsaEncrypt(data, "rsa_public.pem")
-	decrypted := RsaDecrypt(encrypted, "rsa_private.pem")
-
-	assert := internal.NewAssert(t, "TestRsaEncrypt")
-	assert.Equal(string(data), string(decrypted))
-}
-
-func TestRsaEncryptOAEP(t *testing.T) {
-	assert := internal.NewAssert(t, "TestRsaEncrypt")
-	t.Parallel()
-
-	pri, pub := GenerateRsaKeyPair(1024)
-
-	data := []byte("hello world")
-	label := []byte("123456")
-
-	encrypted, err := RsaEncryptOAEP(data, label, *pub)
-	assert.IsNil(err)
-
-	decrypted, err := RsaDecryptOAEP([]byte(encrypted), label, *pri)
-
-	assert.IsNil(err)
-	assert.Equal("hello world", string(decrypted))
-}

cryptor/des.go

@@ -0,0 +1,178 @@
+// Copyright 2021 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package cryptor implements some util functions to encrypt and decrypt.
+package cryptor
+
+import (
+	"bytes"
+	"crypto/cipher"
+	"crypto/des"
+	"crypto/rand"
+	"io"
+)
+
+// DesEcbEncrypt encrypt data with key use DES ECB algorithm
+// len(key) should be 8
+func DesEcbEncrypt(data, key []byte) []byte {
+	cipher, _ := des.NewCipher(generateDesKey(key))
+	length := (len(data) + des.BlockSize) / des.BlockSize
+	plain := make([]byte, length*des.BlockSize)
+	copy(plain, data)
+
+	pad := byte(len(plain) - len(data))
+	for i := len(data); i < len(plain); i++ {
+		plain[i] = pad
+	}
+
+	encrypted := make([]byte, len(plain))
+	for bs, be := 0, cipher.BlockSize(); bs <= len(data); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
+		cipher.Encrypt(encrypted[bs:be], plain[bs:be])
+	}
+
+	return encrypted
+}
+
+// DesEcbDecrypt decrypt data with key use DES ECB algorithm
+// len(key) should be 8
+func DesEcbDecrypt(encrypted, key []byte) []byte {
+	cipher, _ := des.NewCipher(generateDesKey(key))
+	decrypted := make([]byte, len(encrypted))
+
+	for bs, be := 0, cipher.BlockSize(); bs < len(encrypted); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
+		cipher.Decrypt(decrypted[bs:be], encrypted[bs:be])
+	}
+
+	trim := 0
+	if len(decrypted) > 0 {
+		trim = len(decrypted) - int(decrypted[len(decrypted)-1])
+	}
+
+	return decrypted[:trim]
+}
+
+// DesCbcEncrypt encrypt data with key use DES CBC algorithm
+// len(key) should be 8
+func DesCbcEncrypt(data, key []byte) []byte {
+	block, _ := des.NewCipher(key)
+	data = pkcs7Padding(data, block.BlockSize())
+
+	encrypted := make([]byte, des.BlockSize+len(data))
+	iv := encrypted[:des.BlockSize]
+	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+		panic(err)
+	}
+
+	mode := cipher.NewCBCEncrypter(block, iv)
+	mode.CryptBlocks(encrypted[des.BlockSize:], data)
+
+	return encrypted
+}
+
+// DesCbcDecrypt decrypt data with key use DES CBC algorithm
+// len(key) should be 8
+func DesCbcDecrypt(encrypted, key []byte) []byte {
+	block, _ := des.NewCipher(key)
+
+	iv := encrypted[:des.BlockSize]
+	encrypted = encrypted[des.BlockSize:]
+
+	mode := cipher.NewCBCDecrypter(block, iv)
+	mode.CryptBlocks(encrypted, encrypted)
+
+	decrypted := pkcs7UnPadding(encrypted)
+	return decrypted
+}
+
+// DesCtrCrypt encrypt data with key use DES CTR algorithm
+// len(key) should be 8
+func DesCtrCrypt(data, key []byte) []byte {
+	block, _ := des.NewCipher(key)
+
+	iv := bytes.Repeat([]byte("1"), block.BlockSize())
+	stream := cipher.NewCTR(block, iv)
+
+	dst := make([]byte, len(data))
+	stream.XORKeyStream(dst, data)
+
+	return dst
+}
+
+// DesCfbEncrypt encrypt data with key use DES CFB algorithm
+// len(key) should be 8
+func DesCfbEncrypt(data, key []byte) []byte {
+	block, err := des.NewCipher(key)
+	if err != nil {
+		panic(err)
+	}
+
+	encrypted := make([]byte, des.BlockSize+len(data))
+	iv := encrypted[:des.BlockSize]
+	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+		panic(err)
+	}
+
+	stream := cipher.NewCFBEncrypter(block, iv)
+	stream.XORKeyStream(encrypted[des.BlockSize:], data)
+
+	return encrypted
+}
+
+// DesCfbDecrypt decrypt data with key use DES CFB algorithm
+// len(encrypted) should be great than 16, len(key) should be 8
+func DesCfbDecrypt(encrypted, key []byte) []byte {
+	block, _ := des.NewCipher(key)
+	if len(encrypted) < des.BlockSize {
+		panic("encrypted data is too short")
+	}
+	iv := encrypted[:des.BlockSize]
+	encrypted = encrypted[des.BlockSize:]
+
+	stream := cipher.NewCFBDecrypter(block, iv)
+	stream.XORKeyStream(encrypted, encrypted)
+
+	return encrypted
+}
+
+// DesOfbEncrypt encrypt data with key use DES OFB algorithm
+// len(key) should be 16, 24 or 32
+func DesOfbEncrypt(data, key []byte) []byte {
+	block, err := des.NewCipher(key)
+	if err != nil {
+		panic(err)
+	}
+	data = pkcs7Padding(data, des.BlockSize)
+	encrypted := make([]byte, des.BlockSize+len(data))
+	iv := encrypted[:des.BlockSize]
+	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+		panic(err)
+	}
+
+	stream := cipher.NewOFB(block, iv)
+	stream.XORKeyStream(encrypted[des.BlockSize:], data)
+
+	return encrypted
+}
+
+// DesOfbDecrypt decrypt data with key use DES OFB algorithm
+// len(key) should be 8
+func DesOfbDecrypt(data, key []byte) []byte {
+	block, err := des.NewCipher(key)
+	if err != nil {
+		panic(err)
+	}
+
+	iv := data[:des.BlockSize]
+	data = data[des.BlockSize:]
+	if len(data)%des.BlockSize != 0 {
+		return nil
+	}
+
+	decrypted := make([]byte, len(data))
+	mode := cipher.NewOFB(block, iv)
+	mode.XORKeyStream(decrypted, data)
+
+	decrypted = pkcs7UnPadding(decrypted)
+
+	return decrypted
+}

cryptor/des_test.go

@@ -0,0 +1,62 @@
+package cryptor
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestDesEcbEncrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefgh"
+
+	desEcbEncrypt := DesEcbEncrypt([]byte(data), []byte(key))
+	desEcbDecrypt := DesEcbDecrypt(desEcbEncrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestDesEcbEncrypt")
+	assert.Equal(data, string(desEcbDecrypt))
+}
+
+func TestDesCbcEncrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefgh"
+
+	desCbcEncrypt := DesCbcEncrypt([]byte(data), []byte(key))
+	desCbcDecrypt := DesCbcDecrypt(desCbcEncrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestDesCbcEncrypt")
+	assert.Equal(data, string(desCbcDecrypt))
+}
+
+func TestDesCtrCrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefgh"
+
+	desCtrCrypt := DesCtrCrypt([]byte(data), []byte(key))
+	desCtrDeCrypt := DesCtrCrypt(desCtrCrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestDesCtrCrypt")
+	assert.Equal(data, string(desCtrDeCrypt))
+}
+
+func TestDesCfbEncrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefgh"
+
+	desCfbEncrypt := DesCfbEncrypt([]byte(data), []byte(key))
+	desCfbDecrypt := DesCfbDecrypt(desCfbEncrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestDesCfbEncrypt")
+	assert.Equal(data, string(desCfbDecrypt))
+}
+
+func TestDesOfbEncrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefgh"
+
+	desOfbEncrypt := DesOfbEncrypt([]byte(data), []byte(key))
+	desOfbDecrypt := DesOfbDecrypt(desOfbEncrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestDesOfbEncrypt")
+	assert.Equal(data, string(desOfbDecrypt))
+}

cryptor/rsa.go

@@ -0,0 +1,118 @@
+// Copyright 2021 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package cryptor implements some util functions to encrypt and decrypt.
+package cryptor
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/pem"
+	"os"
+)
+
+// GenerateRsaKey make  a rsa private key, and return key file name
+// Generated key file is `rsa_private.pem` and `rsa_public.pem` in current path
+func GenerateRsaKey(keySize int, priKeyFile, pubKeyFile string) error {
+	// private key
+	privateKey, err := rsa.GenerateKey(rand.Reader, keySize)
+	if err != nil {
+		return err
+	}
+
+	derText := x509.MarshalPKCS1PrivateKey(privateKey)
+
+	block := pem.Block{
+		Type:  "rsa private key",
+		Bytes: derText,
+	}
+
+	//file,err := os.Create("rsa_private.pem")
+	file, err := os.Create(priKeyFile)
+	if err != nil {
+		panic(err)
+	}
+	pem.Encode(file, &block)
+	file.Close()
+
+	// public key
+	publicKey := privateKey.PublicKey
+
+	derpText, err := x509.MarshalPKIXPublicKey(&publicKey)
+	if err != nil {
+		return err
+	}
+
+	block = pem.Block{
+		Type:  "rsa public key",
+		Bytes: derpText,
+	}
+
+	//file,err = os.Create("rsa_public.pem")
+	file, err = os.Create(pubKeyFile)
+	if err != nil {
+		return err
+	}
+	pem.Encode(file, &block)
+	file.Close()
+
+	return nil
+}
+
+// RsaEncrypt encrypt data with ras algorithm
+func RsaEncrypt(data []byte, pubKeyFileName string) []byte {
+	file, err := os.Open(pubKeyFileName)
+	if err != nil {
+		panic(err)
+	}
+	fileInfo, err := file.Stat()
+	if err != nil {
+		panic(err)
+	}
+	defer file.Close()
+	buf := make([]byte, fileInfo.Size())
+	file.Read(buf)
+
+	block, _ := pem.Decode(buf)
+
+	pubInterface, err := x509.ParsePKIXPublicKey(block.Bytes)
+	if err != nil {
+		panic(err)
+	}
+	pubKey := pubInterface.(*rsa.PublicKey)
+
+	cipherText, err := rsa.EncryptPKCS1v15(rand.Reader, pubKey, data)
+	if err != nil {
+		panic(err)
+	}
+	return cipherText
+}
+
+// RsaDecrypt decrypt data with ras algorithm
+func RsaDecrypt(data []byte, privateKeyFileName string) []byte {
+	file, err := os.Open(privateKeyFileName)
+	if err != nil {
+		panic(err)
+	}
+	fileInfo, err := file.Stat()
+	if err != nil {
+		panic(err)
+	}
+	buf := make([]byte, fileInfo.Size())
+	defer file.Close()
+	file.Read(buf)
+
+	block, _ := pem.Decode(buf)
+
+	priKey, err := x509.ParsePKCS1PrivateKey(block.Bytes)
+	if err != nil {
+		panic(err)
+	}
+
+	plainText, err := rsa.DecryptPKCS1v15(rand.Reader, priKey, data)
+	if err != nil {
+		panic(err)
+	}
+	return plainText
+}

cryptor/rsa_test.go

@@ -0,0 +1,20 @@
+package cryptor
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestRsaEncrypt(t *testing.T) {
+	err := GenerateRsaKey(4096, "rsa_private.pem", "rsa_public.pem")
+	if err != nil {
+		t.FailNow()
+	}
+	data := []byte("hello world")
+	encrypted := RsaEncrypt(data, "rsa_public.pem")
+	decrypted := RsaDecrypt(encrypted, "rsa_private.pem")
+
+	assert := internal.NewAssert(t, "TestRsaEncrypt")
+	assert.Equal(string(data), string(decrypted))
+}

datastructure/hashmap/hashmap.go

@@ -0,0 +1,133 @@
+// Copyright 2021 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package datastructure implements some data structure. eg. list, linklist, stack, queue, tree, graph.
+package datastructure
+
+import (
+	"fmt"
+	"hash/fnv"
+)
+
+var defaultMapCapacity uint64 = 1 << 10
+
+type mapNode struct {
+	key   any
+	value any
+	next  *mapNode
+}
+
+//HashMap implements a hash map
+type HashMap struct {
+	capacity uint64
+	size     uint64
+	table    []*mapNode
+}
+
+// NewHashMap return a HashMap instance
+func NewHashMap() *HashMap {
+	return &HashMap{
+		capacity: defaultMapCapacity,
+		table:    make([]*mapNode, defaultMapCapacity),
+	}
+}
+
+// NewHashMapWithCapacity return a HashMap instance with given size and capacity
+func NewHashMapWithCapacity(size, capacity uint64) *HashMap {
+	return &HashMap{
+		size:     size,
+		capacity: capacity,
+		table:    make([]*mapNode, capacity),
+	}
+}
+
+// Get return the value of given key in hashmap
+func (hm *HashMap) Get(key any) any {
+	hashValue := hm.hash(key)
+	node := hm.table[hashValue]
+	if node != nil {
+		return node.value
+	}
+
+	return nil
+}
+
+// Put new key value in hashmap
+func (hm *HashMap) Put(key any, value any) {
+	hm.putValue(hm.hash(key), key, value)
+}
+
+func (hm *HashMap) putValue(hash uint64, key, value any) {
+	if hm.capacity == 0 {
+		hm.capacity = defaultMapCapacity
+		hm.table = make([]*mapNode, defaultMapCapacity)
+	}
+
+	node := hm.table[hash]
+	if node == nil {
+		hm.table[hash] = newMapNode(key, value)
+	} else if node.key == key {
+		hm.table[hash] = newMapNodeWithNext(key, value, node)
+	} else {
+		hm.resize()
+		hm.putValue(hash, value, value)
+	}
+	hm.size++
+}
+
+// Delete item by given key in hashmap
+func (hm *HashMap) Delete(key any) {
+	hash := hm.hash(key)
+	node := hm.table[hash]
+	if node == nil {
+		return
+	}
+
+	hm.table = append(hm.table[:hash], hm.table[hash+1:]...)
+	hm.size--
+}
+
+// Contains checks if given key is in hashmap or not
+func (hm *HashMap) Contains(key any) bool {
+	node := hm.table[hm.hash(key)]
+	return node != nil
+}
+
+func (hm *HashMap) resize() {
+	hm.capacity <<= 1
+
+	tempTable := hm.table
+
+	for i := 0; i < len(tempTable); i++ {
+		node := tempTable[i]
+		if node == nil {
+			continue
+		}
+
+		hm.table[hm.hash(node.key)] = node
+	}
+}
+
+func (hm *HashMap) hash(key any) uint64 {
+	h := fnv.New64a()
+	_, _ = h.Write([]byte(fmt.Sprintf("%v", key)))
+
+	hashValue := h.Sum64()
+
+	return (hm.capacity - 1) & (hashValue ^ (hashValue >> 16))
+}
+
+func newMapNode(key, value any) *mapNode {
+	return &mapNode{
+		key:   key,
+		value: value,
+	}
+}
+
+func newMapNodeWithNext(key, value any, next *mapNode) *mapNode {
+	return &mapNode{
+		key:   key,
+		value: value,
+		next:  next,
+	}
+}

datastructure/hashmap/hashmap_test.go

@@ -0,0 +1,42 @@
+package datastructure
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestHashMap_PutAndGet(t *testing.T) {
+	assert := internal.NewAssert(t, "TestHashMap_PutAndGet")
+
+	hm := NewHashMap()
+
+	hm.Put("abc", 3)
+	assert.Equal(3, hm.Get("abc"))
+	assert.IsNil(hm.Get("abcd"))
+
+	hm.Put("abc", 4)
+	assert.Equal(4, hm.Get("abc"))
+}
+
+func TestHashMap_Delete(t *testing.T) {
+	assert := internal.NewAssert(t, "TestHashMap_Delete")
+
+	hm := NewHashMap()
+
+	hm.Put("abc", 3)
+	assert.Equal(3, hm.Get("abc"))
+
+	hm.Delete("abc")
+	assert.IsNil(hm.Get("abc"))
+}
+
+func TestHashMap_Contains(t *testing.T) {
+	assert := internal.NewAssert(t, "TestHashMap_Contains")
+
+	hm := NewHashMap()
+	assert.Equal(false, hm.Contains("abc"))
+
+	hm.Put("abc", 3)
+	assert.Equal(true, hm.Contains("abc"))
+}

datastructure/heap/maxheap.go

@@ -0,0 +1,203 @@
+// Copyright 2021 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package datastructure implements some data structure. eg. list, linklist, stack, queue, tree, graph.
+package datastructure
+
+import (
+	"fmt"
+
+	"github.com/duke-git/lancet/v2/lancetconstraints"
+)
+
+// MaxHeap implements a binary max heap
+// type T should implements Compare function in lancetconstraints.Comparator interface.
+type MaxHeap[T any] struct {
+	data       []T
+	comparator lancetconstraints.Comparator
+}
+
+// NewMaxHeap returns a MaxHeap instance with the given comparator.
+func NewMaxHeap[T any](comparator lancetconstraints.Comparator) *MaxHeap[T] {
+	return &MaxHeap[T]{
+		data:       make([]T, 0),
+		comparator: comparator,
+	}
+}
+
+// BuildMaxHeap builds a MaxHeap instance with data and given comparator.
+func BuildMaxHeap[T any](data []T, comparator lancetconstraints.Comparator) *MaxHeap[T] {
+	heap := &MaxHeap[T]{
+		data:       make([]T, 0, len(data)),
+		comparator: comparator,
+	}
+
+	for _, v := range data {
+		heap.Push(v)
+	}
+
+	return heap
+}
+
+// Push value into the heap
+func (h *MaxHeap[T]) Push(value T) {
+	h.data = append(h.data, value)
+	h.heapifyUp(len(h.data) - 1)
+}
+
+// heapifyUp heapify the data from bottom to top
+func (h *MaxHeap[T]) heapifyUp(i int) {
+	for h.comparator.Compare(h.data[parentIndex(i)], h.data[i]) < 0 {
+		h.swap(parentIndex(i), i)
+		i = parentIndex(i)
+	}
+}
+
+// Pop return the largest value, and remove it from the heap
+// if heap is empty, return zero value and fasle
+func (h *MaxHeap[T]) Pop() (T, bool) {
+	var val T
+	if h.Size() == 0 {
+		return val, false
+	}
+
+	val = h.data[0]
+	l := len(h.data) - 1
+
+	h.data[0] = h.data[l]
+	h.data = h.data[:l]
+	h.heapifyDown(0)
+
+	return val, true
+}
+
+// heapifyDown heapify the data from top to bottom
+func (h *MaxHeap[T]) heapifyDown(i int) {
+	lastIndex := len(h.data) - 1
+	l, r := leftChildIndex(i), rightChildIndex(i)
+	childToCompare := 0
+
+	for l <= lastIndex {
+		if l == lastIndex {
+			childToCompare = l
+		} else if h.comparator.Compare(h.data[l], h.data[r]) > 0 {
+			childToCompare = l
+		} else {
+			childToCompare = r
+		}
+
+		if h.comparator.Compare(h.data[i], h.data[childToCompare]) < 0 {
+			h.swap(i, childToCompare)
+			i = childToCompare
+			l, r = leftChildIndex(i), rightChildIndex(i)
+		} else {
+			break
+		}
+	}
+}
+
+// Peek returns the largest element from the heap without removing it.
+// if heap is empty, it returns zero value and false.
+func (h *MaxHeap[T]) Peek() (T, bool) {
+	if h.Size() == 0 {
+		var val T
+		return val, false
+	}
+
+	return h.data[0], true
+}
+
+// Size return the number of elements in the heap
+func (h *MaxHeap[T]) Size() int {
+	return len(h.data)
+}
+
+// Data return data of the heap
+func (h *MaxHeap[T]) Data() []T {
+	return h.data
+}
+
+// PrintStructure print the structure of the heap
+func (h *MaxHeap[T]) PrintStructure() {
+	level := 1
+	data := h.data
+	length := len(h.data)
+	index := 0
+
+	list := [][]string{}
+	temp := []string{}
+	for index < length {
+		start := powerTwo(level-1) - 1
+		end := start + powerTwo(level-1) - 1
+
+		temp = append(temp, fmt.Sprintf("%v", data[index]))
+		index++
+
+		if index > end || index >= length {
+			list = append(list, temp)
+			temp = []string{}
+
+			if index < length {
+				level++
+			}
+		}
+	}
+
+	lastNum := powerTwo(level - 1)
+	lastLen := lastNum + (lastNum - 1)
+
+	heapTree := make([][]string, level, level)
+	for i := 0; i < level; i++ {
+		heapTree[i] = make([]string, lastLen, lastLen)
+		for j := 0; j < lastLen; j++ {
+			heapTree[i][j] = ""
+		}
+	}
+
+	for k := 0; k < len(list); k++ {
+		vals := list[k]
+		tempLevel := level - k
+		st := powerTwo(tempLevel-1) - 1
+		for _, v := range vals {
+			heapTree[k][st] = v
+			gap := powerTwo(tempLevel)
+			st = st + gap
+		}
+	}
+
+	for m := 0; m < level; m++ {
+		for n := 0; n < lastLen; n++ {
+			val := heapTree[m][n]
+			if val == "" {
+				fmt.Printf(" ")
+			} else {
+				fmt.Printf(val)
+			}
+		}
+		fmt.Println()
+	}
+}
+
+// parentIndex get parent index of the given index
+func parentIndex(i int) int {
+	return (i - 1) / 2
+}
+
+// leftChildIndex get left child index of the given index
+func leftChildIndex(i int) int {
+	return 2*i + 1
+}
+
+// rightChildIndex get right child index of the given index
+func rightChildIndex(i int) int {
+	return 2*i + 2
+}
+
+// swap two elements in the heap
+func (h *MaxHeap[T]) swap(i, j int) {
+	h.data[i], h.data[j] = h.data[j], h.data[i]
+}
+
+func powerTwo(n int) int {
+	return 1 << n
+}

datastructure/heap/maxheap_test.go

@@ -0,0 +1,92 @@
+package datastructure
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func TestMaxHeap_BuildMaxHeap(t *testing.T) {
+	assert := internal.NewAssert(t, "TestMaxHeap_BuildMaxHeap")
+
+	values := []int{6, 5, 2, 4, 7, 10, 12, 1, 3, 8, 9, 11}
+	heap := BuildMaxHeap(values, &intComparator{})
+
+	expected := []int{12, 9, 11, 4, 8, 10, 7, 1, 3, 5, 6, 2}
+	assert.Equal(expected, heap.data)
+
+	assert.Equal(12, heap.Size())
+
+	heap.PrintStructure()
+}
+
+func TestMaxHeap_Push(t *testing.T) {
+	assert := internal.NewAssert(t, "TestMaxHeap_Push")
+
+	heap := NewMaxHeap[int](&intComparator{})
+	values := []int{6, 5, 2, 4, 7, 10, 12, 1, 3, 8, 9, 11}
+
+	for _, v := range values {
+		heap.Push(v)
+	}
+
+	expected := []int{12, 9, 11, 4, 8, 10, 7, 1, 3, 5, 6, 2}
+	assert.Equal(expected, heap.data)
+
+	assert.Equal(12, heap.Size())
+
+	heap.PrintStructure()
+}
+
+func TestMaxHeap_Pop(t *testing.T) {
+	assert := internal.NewAssert(t, "TestMaxHeap_Pop")
+
+	heap := NewMaxHeap[int](&intComparator{})
+
+	_, ok := heap.Pop()
+	assert.Equal(false, ok)
+
+	values := []int{6, 5, 2, 4, 7, 10, 12, 1, 3, 8, 9, 11}
+	for _, v := range values {
+		heap.Push(v)
+	}
+
+	val, ok := heap.Pop()
+	assert.Equal(12, val)
+	assert.Equal(true, ok)
+	assert.Equal(11, heap.Size())
+}
+
+func TestMaxHeap_Peek(t *testing.T) {
+	assert := internal.NewAssert(t, "TestMaxHeap_Peek")
+
+	heap := NewMaxHeap[int](&intComparator{})
+
+	_, ok := heap.Peek()
+	assert.Equal(false, ok)
+
+	values := []int{6, 5, 2, 4, 7, 10, 12, 1, 3, 8, 9, 11}
+	for _, v := range values {
+		heap.Push(v)
+	}
+
+	val, ok := heap.Peek()
+	assert.Equal(12, val)
+	assert.Equal(true, ok)
+
+	assert.Equal(12, heap.Size())
+}

datastructure/link/doublylink.go

@@ -0,0 +1,241 @@
+package datastructure
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/duke-git/lancet/v2/datastructure"
+)
+
+// DoublyLink is a linked list. Whose node has a generic Value, Pre pointer points to a previous node of the link, Next pointer points to a next node of the link.
+type DoublyLink[T any] struct {
+	Head   *datastructure.LinkNode[T]
+	length int
+}
+
+// NewDoublyLink return *DoublyLink instance
+func NewDoublyLink[T any]() *DoublyLink[T] {
+	return &DoublyLink[T]{Head: nil}
+}
+
+// InsertAtHead insert value into doubly linklist at head index
+func (link *DoublyLink[T]) InsertAtHead(value T) {
+	newNode := datastructure.NewLinkNode(value)
+	size := link.Size()
+
+	if size == 0 {
+		link.Head = newNode
+		link.length++
+		return
+	}
+
+	newNode.Next = link.Head
+	newNode.Pre = nil
+
+	link.Head.Pre = newNode
+	link.Head = newNode
+
+	link.length++
+}
+
+// InsertAtTail insert value into doubly linklist at tail index
+func (link *DoublyLink[T]) InsertAtTail(value T) {
+	current := link.Head
+	if current == nil {
+		link.InsertAtHead(value)
+		return
+	}
+
+	for current.Next != nil {
+		current = current.Next
+	}
+
+	newNode := datastructure.NewLinkNode(value)
+	newNode.Next = nil
+	newNode.Pre = current
+	current.Next = newNode
+
+	link.length++
+}
+
+// InsertAt insert value into doubly linklist at index
+func (link *DoublyLink[T]) InsertAt(index int, value T) error {
+	size := link.length
+	if index < 0 || index > size {
+		return errors.New("param index should between 0 and the length of doubly link.")
+	}
+
+	if index == 0 {
+		link.InsertAtHead(value)
+		return nil
+	}
+
+	if index == size {
+		link.InsertAtTail(value)
+		return nil
+	}
+
+	i := 0
+	current := link.Head
+
+	for current != nil {
+		if i == index-1 {
+			newNode := datastructure.NewLinkNode(value)
+			newNode.Next = current.Next
+			newNode.Pre = current
+
+			current.Next = newNode
+			link.length++
+
+			return nil
+		}
+		i++
+		current = current.Next
+	}
+
+	return errors.New("doubly link list no exist")
+}
+
+// DeleteAtHead delete value in doubly linklist at head index
+func (link *DoublyLink[T]) DeleteAtHead() error {
+	if link.Head == nil {
+		return errors.New("doubly link list no exist")
+	}
+	current := link.Head
+	link.Head = current.Next
+	link.Head.Pre = nil
+	link.length--
+
+	return nil
+}
+
+// DeleteAtTail delete value in doubly linklist at tail index
+func (link *DoublyLink[T]) DeleteAtTail() error {
+	if link.Head == nil {
+		return errors.New("doubly link list no exist")
+	}
+	current := link.Head
+	if current.Next == nil {
+		return link.DeleteAtHead()
+	}
+
+	for current.Next.Next != nil {
+		current = current.Next
+	}
+
+	current.Next = nil
+	link.length--
+	return nil
+}
+
+// DeleteAt delete value in doubly linklist at index
+func (link *DoublyLink[T]) DeleteAt(index int) error {
+	if link.Head == nil {
+		return errors.New("doubly link list no exist")
+	}
+	current := link.Head
+	if current.Next == nil || index == 0 {
+		return link.DeleteAtHead()
+	}
+
+	if index == link.length-1 {
+		return link.DeleteAtTail()
+	}
+
+	if index < 0 || index > link.length-1 {
+		return errors.New("param index should between 0 and link size -1.")
+	}
+
+	i := 0
+	for current != nil {
+		if i == index-1 {
+			current.Next = current.Next.Next
+			link.length--
+			return nil
+		}
+		i++
+		current = current.Next
+	}
+
+	return errors.New("delete error")
+}
+
+// Reverse the linked list
+func (link *DoublyLink[T]) Reverse() {
+	current := link.Head
+	var temp *datastructure.LinkNode[T]
+
+	for current != nil {
+		temp = current.Pre
+		current.Pre = current.Next
+		current.Next = temp
+		current = current.Pre
+	}
+
+	if temp != nil {
+		link.Head = temp.Pre
+	}
+}
+
+// GetMiddleNode return node at middle index of linked list
+func (link *DoublyLink[T]) GetMiddleNode() *datastructure.LinkNode[T] {
+	if link.Head == nil {
+		return nil
+	}
+	if link.Head.Next == nil {
+		return link.Head
+	}
+	fast := link.Head
+	slow := link.Head
+
+	for fast != nil {
+		fast = fast.Next
+
+		if fast != nil {
+			fast = fast.Next
+			slow = slow.Next
+		} else {
+			return slow
+		}
+	}
+	return slow
+}
+
+// Size return the count of doubly linked list
+func (link *DoublyLink[T]) Size() int {
+	return link.length
+}
+
+// Values return slice of all doubly linklist node value
+func (link *DoublyLink[T]) Values() []T {
+	result := []T{}
+	current := link.Head
+	for current != nil {
+		result = append(result, current.Value)
+		current = current.Next
+	}
+	return result
+}
+
+// Print all nodes info of a linked list
+func (link *DoublyLink[T]) Print() {
+	current := link.Head
+	info := "[ "
+	for current != nil {
+		info += fmt.Sprintf("%+v, ", current)
+		current = current.Next
+	}
+	info += " ]"
+	fmt.Println(info)
+}
+
+// IsEmpty checks if link is empty or not
+func (link *DoublyLink[T]) IsEmpty() bool {
+	return link.length == 0
+}
+
+// Clear all nodes in doubly linklist
+func (link *DoublyLink[T]) Clear() {
+	link.Head = nil
+	link.length = 0
+}

datastructure/link/doublylink_test.go

@@ -0,0 +1,179 @@
+package datastructure
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestDoublyLink_InsertAtFirst(t *testing.T) {
+	assert := internal.NewAssert(t, "TestDoublyLink_InsertAtFirst")
+
+	link := NewDoublyLink[int]()
+	link.InsertAtHead(1)
+	link.InsertAtHead(2)
+	link.InsertAtHead(3)
+	link.Print()
+
+	expected := []int{3, 2, 1}
+	values := link.Values()
+
+	assert.Equal(expected, values)
+}
+
+func TestDoublyLink_InsertAtTail(t *testing.T) {
+	assert := internal.NewAssert(t, "TestDoublyLink_InsertAtTail")
+
+	link := NewDoublyLink[int]()
+	link.InsertAtTail(1)
+	link.InsertAtTail(2)
+	link.InsertAtTail(3)
+	link.Print()
+
+	expected := []int{1, 2, 3}
+	values := link.Values()
+
+	assert.Equal(expected, values)
+}
+
+func TestDoublyLink_InsertAt(t *testing.T) {
+	assert := internal.NewAssert(t, "TestDoublyLink_InsertAt")
+
+	link := NewDoublyLink[int]()
+
+	err := link.InsertAt(1, 1)
+	assert.IsNotNil(err)
+
+	link.InsertAt(0, 1)
+	link.InsertAt(1, 2)
+	link.InsertAt(2, 4)
+	link.InsertAt(2, 3)
+
+	link.Print()
+
+	expected := []int{1, 2, 3, 4}
+	values := link.Values()
+
+	assert.Equal(expected, values)
+
+}
+
+func TestDoublyLink_DeleteAtHead(t *testing.T) {
+	assert := internal.NewAssert(t, "TestDoublyLink_DeleteAtHead")
+
+	link := NewDoublyLink[int]()
+	err := link.DeleteAtHead()
+	assert.IsNotNil(err)
+
+	link.InsertAtTail(1)
+	link.InsertAtTail(2)
+	link.InsertAtTail(3)
+	link.InsertAtTail(4)
+
+	link.DeleteAtHead()
+	link.Print()
+
+	expected := []int{2, 3, 4}
+	values := link.Values()
+
+	assert.Equal(expected, values)
+}
+
+func TestDoublyLink_DeleteAtTail(t *testing.T) {
+	assert := internal.NewAssert(t, "TestDoublyLink_DeleteAtTail")
+
+	link := NewDoublyLink[int]()
+	err := link.DeleteAtTail()
+	assert.IsNotNil(err)
+
+	link.InsertAtTail(1)
+	link.InsertAtTail(2)
+	link.InsertAtTail(3)
+	link.InsertAtTail(4)
+
+	link.DeleteAtTail()
+	link.Print()
+
+	expected := []int{1, 2, 3}
+	values := link.Values()
+
+	assert.Equal(expected, values)
+}
+
+func TestDoublyLink_DeleteAt(t *testing.T) {
+	assert := internal.NewAssert(t, "TestDoublyLink_DeleteAt")
+
+	link := NewDoublyLink[int]()
+	err := link.DeleteAt(0)
+	assert.IsNotNil(err)
+
+	link.InsertAtTail(1)
+	link.InsertAtTail(2)
+	link.InsertAtTail(3)
+	link.InsertAtTail(4)
+	link.InsertAtTail(5)
+
+	err = link.DeleteAt(5)
+	assert.IsNotNil(err)
+
+	err = link.DeleteAt(0)
+	assert.IsNil(err)
+	assert.Equal([]int{2, 3, 4, 5}, link.Values())
+
+	link.DeleteAt(3)
+	assert.Equal([]int{2, 3, 4}, link.Values())
+
+	link.DeleteAt(1)
+	assert.Equal(2, link.Size())
+	assert.Equal([]int{2, 4}, link.Values())
+}
+
+func TestDoublyLink_Reverse(t *testing.T) {
+	assert := internal.NewAssert(t, "TestDoublyLink_Reverse")
+
+	link := NewDoublyLink[int]()
+	link.InsertAtTail(1)
+	link.InsertAtTail(2)
+	link.InsertAtTail(3)
+	link.InsertAtTail(4)
+
+	link.Reverse()
+	link.Print()
+	assert.Equal([]int{4, 3, 2, 1}, link.Values())
+}
+
+func TestDoublyLink_GetMiddleNode(t *testing.T) {
+	assert := internal.NewAssert(t, "TestDoublyLink_GetMiddleNode")
+
+	link := NewDoublyLink[int]()
+	link.InsertAtTail(1)
+	link.InsertAtTail(2)
+	link.InsertAtTail(3)
+	link.InsertAtTail(4)
+
+	middle1 := link.GetMiddleNode()
+	assert.Equal(3, middle1.Value)
+
+	link.InsertAtTail(5)
+	link.InsertAtTail(6)
+	link.InsertAtTail(7)
+	middle2 := link.GetMiddleNode()
+	assert.Equal(4, middle2.Value)
+}
+
+func TestDoublyLink_Clear(t *testing.T) {
+	assert := internal.NewAssert(t, "TestDoublyLink_Clear")
+
+	link := NewDoublyLink[int]()
+
+	assert.Equal(true, link.IsEmpty())
+	assert.Equal(0, link.Size())
+
+	link.InsertAtTail(1)
+	assert.Equal(false, link.IsEmpty())
+	assert.Equal(1, link.Size())
+
+	link.Clear()
+	assert.Equal(true, link.IsEmpty())
+	assert.Equal(0, link.Size())
+}

datastructure/link/singlylink.go

@@ -0,0 +1,246 @@
+package datastructure
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+
+	"github.com/duke-git/lancet/v2/datastructure"
+)
+
+// SinglyLink is a linked list. Whose node has a Value generics and Next pointer points to a next node of the link.
+type SinglyLink[T any] struct {
+	Head   *datastructure.LinkNode[T]
+	length int
+}
+
+// NewSinglyLink return *SinglyLink instance
+func NewSinglyLink[T any]() *SinglyLink[T] {
+	return &SinglyLink[T]{Head: nil}
+}
+
+// InsertAtHead insert value into singly linklist at head index
+func (link *SinglyLink[T]) InsertAtHead(value T) {
+	newNode := datastructure.NewLinkNode(value)
+	newNode.Next = link.Head
+	link.Head = newNode
+	link.length++
+}
+
+// InsertAtTail insert value into singly linklist at tail index
+func (link *SinglyLink[T]) InsertAtTail(value T) {
+	current := link.Head
+	if current == nil {
+		link.InsertAtHead(value)
+		return
+	}
+
+	for current.Next != nil {
+		current = current.Next
+	}
+
+	newNode := datastructure.NewLinkNode(value)
+	newNode.Next = nil
+	current.Next = newNode
+
+	link.length++
+}
+
+// InsertAt insert value into singly linklist at index
+func (link *SinglyLink[T]) InsertAt(index int, value T) error {
+	size := link.length
+	if index < 0 || index > size {
+		return errors.New("param index should between 0 and the length of singly link.")
+	}
+
+	if index == 0 {
+		link.InsertAtHead(value)
+		return nil
+	}
+
+	if index == size {
+		link.InsertAtTail(value)
+		return nil
+	}
+
+	i := 0
+	current := link.Head
+
+	for current != nil {
+		if i == index-1 {
+			newNode := datastructure.NewLinkNode(value)
+			newNode.Next = current.Next
+			current.Next = newNode
+			link.length++
+
+			return nil
+		}
+		i++
+		current = current.Next
+	}
+
+	return errors.New("singly link list no exist")
+}
+
+// DeleteAtHead delete value in singly linklist at head index
+func (link *SinglyLink[T]) DeleteAtHead() error {
+	if link.Head == nil {
+		return errors.New("singly link list no exist")
+	}
+	current := link.Head
+	link.Head = current.Next
+	link.length--
+
+	return nil
+}
+
+// DeleteAtTail delete value in singly linklist at tail index
+func (link *SinglyLink[T]) DeleteAtTail() error {
+	if link.Head == nil {
+		return errors.New("singly link list no exist")
+	}
+	current := link.Head
+	if current.Next == nil {
+		return link.DeleteAtHead()
+	}
+
+	for current.Next.Next != nil {
+		current = current.Next
+	}
+
+	current.Next = nil
+	link.length--
+	return nil
+}
+
+// DeleteAt delete value in singly linklist at index
+func (link *SinglyLink[T]) DeleteAt(index int) error {
+	if link.Head == nil {
+		return errors.New("singly link list no exist")
+	}
+	current := link.Head
+	if current.Next == nil || index == 0 {
+		return link.DeleteAtHead()
+	}
+
+	if index == link.length-1 {
+		return link.DeleteAtTail()
+	}
+
+	if index < 0 || index > link.length-1 {
+		return errors.New("param index should between 0 and link size -1.")
+	}
+
+	i := 0
+	for current != nil {
+		if i == index-1 {
+			current.Next = current.Next.Next
+			link.length--
+			return nil
+		}
+		i++
+		current = current.Next
+	}
+
+	return errors.New("delete error")
+}
+
+// DeleteValue delete value in singly linklist
+func (link *SinglyLink[T]) DeleteValue(value T) {
+	if link.Head == nil {
+		return
+	}
+	dummyHead := datastructure.NewLinkNode(value)
+	dummyHead.Next = link.Head
+	current := dummyHead
+
+	for current.Next != nil {
+		if reflect.DeepEqual(current.Next.Value, value) {
+			current.Next = current.Next.Next
+			link.length--
+		} else {
+			current = current.Next
+		}
+	}
+
+	link.Head = dummyHead.Next
+}
+
+// Reverse the linked list
+func (link *SinglyLink[T]) Reverse() {
+	var pre, next *datastructure.LinkNode[T]
+
+	current := link.Head
+
+	for current != nil {
+		next = current.Next
+		current.Next = pre
+		pre = current
+		current = next
+	}
+
+	link.Head = pre
+}
+
+// GetMiddleNode return node at middle index of linked list
+func (link *SinglyLink[T]) GetMiddleNode() *datastructure.LinkNode[T] {
+	if link.Head == nil {
+		return nil
+	}
+	if link.Head.Next == nil {
+		return link.Head
+	}
+	fast := link.Head
+	slow := link.Head
+
+	for fast != nil {
+		fast = fast.Next
+
+		if fast != nil {
+			fast = fast.Next
+			slow = slow.Next
+		} else {
+			return slow
+		}
+	}
+	return slow
+}
+
+// Size return the count of singly linked list
+func (link *SinglyLink[T]) Size() int {
+	return link.length
+}
+
+// Values return slice of all singly linklist node value
+func (link *SinglyLink[T]) Values() []T {
+	result := []T{}
+	current := link.Head
+	for current != nil {
+		result = append(result, current.Value)
+		current = current.Next
+	}
+	return result
+}
+
+// IsEmpty checks if link is empty or not
+func (link *SinglyLink[T]) IsEmpty() bool {
+	return link.length == 0
+}
+
+// Clear all the node in singly linklist
+func (link *SinglyLink[T]) Clear() {
+	link.Head = nil
+	link.length = 0
+}
+
+// Print all nodes info of a linked list
+func (link *SinglyLink[T]) Print() {
+	current := link.Head
+	info := "[ "
+	for current != nil {
+		info += fmt.Sprintf("%+v, ", current)
+		current = current.Next
+	}
+	info += " ]"
+	fmt.Println(info)
+}

datastructure/link/singlylink_test.go

@@ -0,0 +1,208 @@
+package datastructure
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestSinglyLink_InsertAtFirst(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSinglyLink_InsertAtFirst")
+
+	link := NewSinglyLink[int]()
+	link.InsertAtHead(1)
+	link.InsertAtHead(2)
+	link.InsertAtHead(3)
+	link.Print()
+
+	expected := []int{3, 2, 1}
+	values := link.Values()
+
+	assert.Equal(expected, values)
+}
+
+func TestSinglyLink_InsertAtTail(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSinglyLink_InsertAtTail")
+
+	link := NewSinglyLink[int]()
+	link.InsertAtTail(1)
+	link.InsertAtTail(2)
+	link.InsertAtTail(3)
+	link.Print()
+
+	expected := []int{1, 2, 3}
+	values := link.Values()
+
+	assert.Equal(expected, values)
+}
+
+func TestSinglyLink_InsertAt(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSinglyLink_InsertAt")
+
+	link := NewSinglyLink[int]()
+
+	err := link.InsertAt(1, 1)
+	assert.IsNotNil(err)
+
+	err = link.InsertAt(0, 1)
+	if err != nil {
+		t.FailNow()
+	}
+	err = link.InsertAt(1, 2)
+	if err != nil {
+		t.FailNow()
+	}
+	err = link.InsertAt(2, 4)
+	if err != nil {
+		t.FailNow()
+	}
+	err = link.InsertAt(2, 3)
+	if err != nil {
+		t.FailNow()
+	}
+
+	link.Print()
+
+	expected := []int{1, 2, 3, 4}
+	values := link.Values()
+
+	assert.Equal(expected, values)
+}
+
+func TestSinglyLink_DeleteAtHead(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSinglyLink_DeleteAtHead")
+
+	link := NewSinglyLink[int]()
+	err := link.DeleteAtHead()
+	assert.IsNotNil(err)
+
+	link.InsertAtTail(1)
+	link.InsertAtTail(2)
+	link.InsertAtTail(3)
+	link.InsertAtTail(4)
+
+	link.DeleteAtHead()
+	link.Print()
+
+	expected := []int{2, 3, 4}
+	values := link.Values()
+
+	assert.Equal(expected, values)
+}
+
+func TestSinglyLink_DeleteAtTail(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSinglyLink_DeleteAtTail")
+
+	link := NewSinglyLink[int]()
+	err := link.DeleteAtTail()
+	assert.IsNotNil(err)
+
+	link.InsertAtTail(1)
+	link.InsertAtTail(2)
+	link.InsertAtTail(3)
+	link.InsertAtTail(4)
+
+	link.DeleteAtTail()
+	link.Print()
+
+	expected := []int{1, 2, 3}
+	values := link.Values()
+
+	assert.Equal(expected, values)
+}
+
+func TestSinglyLink_DeleteValue(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSinglyLink_DeleteValue")
+
+	link := NewSinglyLink[int]()
+
+	link.InsertAtTail(1)
+	link.InsertAtTail(2)
+	link.InsertAtTail(2)
+	link.InsertAtTail(3)
+	link.InsertAtTail(4)
+
+	link.DeleteValue(2)
+	assert.Equal([]int{1, 3, 4}, link.Values())
+
+	link.DeleteValue(1)
+	assert.Equal([]int{3, 4}, link.Values())
+}
+
+func TestSinglyLink_DeleteAt(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSinglyLink_DeleteAt")
+
+	link := NewSinglyLink[int]()
+	err := link.DeleteAt(0)
+	assert.IsNotNil(err)
+
+	link.InsertAtTail(1)
+	link.InsertAtTail(2)
+	link.InsertAtTail(3)
+	link.InsertAtTail(4)
+	link.InsertAtTail(5)
+
+	err = link.DeleteAt(5)
+	assert.IsNotNil(err)
+
+	err = link.DeleteAt(0)
+	assert.IsNil(err)
+	assert.Equal([]int{2, 3, 4, 5}, link.Values())
+
+	link.DeleteAt(3)
+	assert.Equal([]int{2, 3, 4}, link.Values())
+
+	link.DeleteAt(1)
+	assert.Equal(2, link.Size())
+	assert.Equal([]int{2, 4}, link.Values())
+}
+
+func TestSinglyLink_Reverse(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSinglyLink_Reverse")
+
+	link := NewSinglyLink[int]()
+	link.InsertAtTail(1)
+	link.InsertAtTail(2)
+	link.InsertAtTail(3)
+	link.InsertAtTail(4)
+
+	link.Reverse()
+	link.Print()
+	assert.Equal([]int{4, 3, 2, 1}, link.Values())
+}
+
+func TestSinglyLink_GetMiddleNode(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSinglyLink_GetMiddleNode")
+
+	link := NewSinglyLink[int]()
+	link.InsertAtTail(1)
+	link.InsertAtTail(2)
+	link.InsertAtTail(3)
+	link.InsertAtTail(4)
+
+	middle1 := link.GetMiddleNode()
+	assert.Equal(3, middle1.Value)
+
+	link.InsertAtTail(5)
+	link.InsertAtTail(6)
+	link.InsertAtTail(7)
+	middle2 := link.GetMiddleNode()
+	assert.Equal(4, middle2.Value)
+}
+
+func TestSinglyLink_Clear(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSinglyLink_Clear")
+
+	link := NewSinglyLink[int]()
+
+	assert.Equal(true, link.IsEmpty())
+	assert.Equal(0, link.Size())
+
+	link.InsertAtTail(1)
+	assert.Equal(false, link.IsEmpty())
+	assert.Equal(1, link.Size())
+
+	link.Clear()
+	assert.Equal(true, link.IsEmpty())
+	assert.Equal(0, link.Size())
+}

datastructure/list/list.go

@@ -0,0 +1,325 @@
+// Copyright 2021 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package datastructure implements some data structure. eg. list, linklist, stack, queue, tree, graph.
+package datastructure
+
+import (
+	"reflect"
+)
+
+// List is a linear table, implemented with slice
+type List[T any] struct {
+	data []T
+}
+
+// NewList return a pointer of List
+func NewList[T any](data []T) *List[T] {
+	return &List[T]{data: data}
+}
+
+// Data return list data
+func (l *List[T]) Data() []T {
+	return l.data
+}
+
+// ValueOf return the value pointer at index of list data.
+func (l *List[T]) ValueOf(index int) (*T, bool) {
+	if index < 0 || index >= len(l.data) {
+		return nil, false
+	}
+	return &l.data[index], true
+}
+
+// IndexOf returns the index of value. if not found return -1
+func (l *List[T]) IndexOf(value T) int {
+	index := -1
+	data := l.data
+	for i, v := range data {
+		if reflect.DeepEqual(v, value) {
+			index = i
+			break
+		}
+	}
+	return index
+}
+
+// LastIndexOf returns the index of the last occurrence of the value in this list.
+// if not found return -1
+func (l *List[T]) LastIndexOf(value T) int {
+	index := -1
+	data := l.data
+	for i := len(data) - 1; i >= 0; i-- {
+		if reflect.DeepEqual(data[i], value) {
+			index = i
+			break
+		}
+	}
+	return index
+}
+
+// IndexOfFunc returns the first index satisfying f(v)
+// if not found return -1
+func (l *List[T]) IndexOfFunc(f func(T) bool) int {
+	index := -1
+	data := l.data
+	for i, v := range data {
+		if f(v) {
+			index = i
+			break
+		}
+	}
+	return index
+}
+
+// LastIndexOfFunc returns the index of the last occurrence of the value in this list satisfying f(data[i])
+// if not found return -1
+func (l *List[T]) LastIndexOfFunc(f func(T) bool) int {
+	index := -1
+	data := l.data
+	for i := len(data) - 1; i >= 0; i-- {
+		if f(data[i]) {
+			index = i
+			break
+		}
+	}
+	return index
+}
+
+// Contain checks if the value in the list or not
+func (l *List[T]) Contain(value T) bool {
+	data := l.data
+	for _, v := range data {
+		if reflect.DeepEqual(v, value) {
+			return true
+		}
+	}
+	return false
+}
+
+// Push append value to the list data
+func (l *List[T]) Push(value T) {
+	l.data = append(l.data, value)
+}
+
+// InsertAtFirst insert value into list at first index
+func (l *List[T]) InsertAtFirst(value T) {
+	l.InsertAt(0, value)
+}
+
+// InsertAtLast insert value into list at last index
+func (l *List[T]) InsertAtLast(value T) {
+	l.InsertAt(len(l.data), value)
+}
+
+// InsertAt insert value into list at index
+func (l *List[T]) InsertAt(index int, value T) {
+	data := l.data
+	size := len(data)
+
+	if index < 0 || index > size {
+		return
+	}
+	l.data = append(data[:index], append([]T{value}, data[index:]...)...)
+}
+
+// PopFirst delete the first value of list and return it
+func (l *List[T]) PopFirst() (*T, bool) {
+	if len(l.data) == 0 {
+		return nil, false
+	}
+
+	v := l.data[0]
+	l.DeleteAt(0)
+
+	return &v, true
+}
+
+// PopLast delete the last value of list and return it
+func (l *List[T]) PopLast() (*T, bool) {
+	size := len(l.data)
+	if size == 0 {
+		return nil, false
+	}
+
+	v := l.data[size-1]
+	l.DeleteAt(size - 1)
+
+	return &v, true
+}
+
+// DeleteAt delete the value of list at index
+func (l *List[T]) DeleteAt(index int) {
+	data := l.data
+	size := len(data)
+	if index < 0 || index > size-1 {
+		return
+	}
+	if index == size-1 {
+		data = append(data[:index])
+	} else {
+		data = append(data[:index], data[index+1:]...)
+	}
+	l.data = data
+}
+
+// DeleteIf delete all satisfying f(data[i]), returns count of removed elements
+func (l *List[T]) DeleteIf(f func(T) bool) int {
+	data := l.data
+	size := len(data)
+
+	var c int
+	for index := 0; index < len(data); index++ {
+		if !f(data[index]) {
+			continue
+		}
+		if index == size-1 {
+			data = append(data[:index])
+		} else {
+			data = append(data[:index], data[index+1:]...)
+			index--
+		}
+		c++
+	}
+
+	if c > 0 {
+		l.data = data
+	}
+	return c
+}
+
+// UpdateAt update value of list at index, index shoud between 0 and list size -1
+func (l *List[T]) UpdateAt(index int, value T) {
+	data := l.data
+	size := len(data)
+
+	if index < 0 || index >= size {
+		return
+	}
+	l.data = append(data[:index], append([]T{value}, data[index+1:]...)...)
+}
+
+// Equal compare list to other list, use reflect.DeepEqual
+func (l *List[T]) Equal(other *List[T]) bool {
+	if len(l.data) != len(other.data) {
+		return false
+	}
+
+	for i := 0; i < len(l.data); i++ {
+		if !reflect.DeepEqual(l.data[i], other.data[i]) {
+			return false
+		}
+	}
+
+	return true
+}
+
+// IsEmpty check if the list is empty or not
+func (l *List[T]) IsEmpty() bool {
+	return len(l.data) == 0
+}
+
+// Clear the data of list
+func (l *List[T]) Clear() {
+	l.data = make([]T, 0, 0)
+}
+
+// Clone return a copy of list
+func (l *List[T]) Clone() *List[T] {
+	cl := NewList(make([]T, len(l.data)))
+	copy(cl.data, l.data)
+
+	return cl
+}
+
+// Merge two list, return new list, don't change original list
+func (l *List[T]) Merge(other *List[T]) *List[T] {
+	l1, l2 := len(l.data), len(other.data)
+	ml := NewList(make([]T, l1+l2, l1+l2))
+
+	data := append([]T{}, append(l.data, other.data...)...)
+	ml.data = data
+
+	return ml
+}
+
+// Size return number of list data items
+func (l *List[T]) Size() int {
+	return len(l.data)
+}
+
+// Cap return cap of the inner data
+func (l *List[T]) Cap() int {
+	return cap(l.data)
+}
+
+// Swap the value of index i and j in list
+func (l *List[T]) Swap(i, j int) {
+	size := len(l.data)
+	if i < 0 || i >= size || j < 0 || j >= size {
+		return
+	}
+	l.data[i], l.data[j] = l.data[j], l.data[i]
+}
+
+// Reverse the item order of list
+func (l *List[T]) Reverse() {
+	for i, j := 0, len(l.data)-1; i < j; i, j = i+1, j-1 {
+		l.data[i], l.data[j] = l.data[j], l.data[i]
+	}
+}
+
+// Unique remove duplicate items in list
+func (l *List[T]) Unique() {
+	data := l.data
+	size := len(data)
+
+	uniqueData := make([]T, 0, 0)
+	for i := 0; i < size; i++ {
+		value := data[i]
+		skip := true
+		for _, v := range uniqueData {
+			if reflect.DeepEqual(value, v) {
+				skip = false
+				break
+			}
+		}
+		if skip {
+			uniqueData = append(uniqueData, value)
+		}
+	}
+
+	l.data = uniqueData
+}
+
+// Union creates a new list contain all element in list l and other, remove duplicate element.
+func (l *List[T]) Union(other *List[T]) *List[T] {
+	result := NewList([]T{})
+
+	result.data = append(result.data, l.data...)
+	result.data = append(result.data, other.data...)
+	result.Unique()
+
+	return result
+}
+
+// Intersection creates a new list whose element both be contained in list l and other
+func (l *List[T]) Intersection(other *List[T]) *List[T] {
+	result := NewList(make([]T, 0, 0))
+
+	for _, v := range l.data {
+		if other.Contain(v) {
+			result.data = append(result.data, v)
+		}
+	}
+
+	return result
+}
+
+// SubList returns a sub list of the original list between the specified fromIndex, inclusive, and toIndex, exclusive.
+func (l *List[T]) SubList(fromIndex, toIndex int) *List[T] {
+	data := l.data[fromIndex:toIndex]
+	subList := make([]T, len(data))
+	copy(subList, data)
+	return NewList(subList)
+}

datastructure/list/list_test.go

@@ -0,0 +1,359 @@
+package datastructure
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestListData(t *testing.T) {
+	assert := internal.NewAssert(t, "TestListData")
+
+	list := NewList([]int{1, 2, 3})
+	assert.Equal([]int{1, 2, 3}, list.Data())
+}
+
+func TestValueOf(t *testing.T) {
+	assert := internal.NewAssert(t, "TestValueOf")
+
+	list := NewList([]int{1, 2, 3})
+	v, ok := list.ValueOf(0)
+	assert.Equal(1, *v)
+	assert.Equal(true, ok)
+
+	_, ok = list.ValueOf(3)
+	assert.Equal(false, ok)
+}
+
+func TestIndexOf(t *testing.T) {
+	assert := internal.NewAssert(t, "TestIndexOf")
+
+	list := NewList([]int{1, 2, 3})
+	i := list.IndexOf(1)
+	assert.Equal(0, i)
+
+	i = list.IndexOf(4)
+	assert.Equal(-1, i)
+}
+
+func TestIndexOfFunc(t *testing.T) {
+	assert := internal.NewAssert(t, "TestIndexOf")
+
+	list := NewList([]int{1, 2, 3})
+	i := list.IndexOfFunc(func(a int) bool { return a == 1 })
+	assert.Equal(0, i)
+
+	i = list.IndexOfFunc(func(a int) bool { return a == 4 })
+	assert.Equal(-1, i)
+}
+
+func TestLastIndexOf(t *testing.T) {
+	assert := internal.NewAssert(t, "TestIndexOf")
+
+	list := NewList([]int{1, 2, 3, 3, 3, 3, 4, 5, 6, 9})
+	i := list.LastIndexOf(3)
+	assert.Equal(5, i)
+
+	i = list.LastIndexOf(10)
+	assert.Equal(-1, i)
+
+	i = list.LastIndexOf(4)
+	assert.Equal(6, i)
+
+	i = list.LastIndexOf(1)
+	assert.Equal(0, i)
+}
+
+func TestLastIndexOfFunc(t *testing.T) {
+	assert := internal.NewAssert(t, "TestIndexOf")
+
+	list := NewList([]int{1, 2, 3, 3, 3, 3, 4, 5, 6, 9})
+	i := list.LastIndexOfFunc(func(a int) bool { return a == 3 })
+	assert.Equal(5, i)
+
+	i = list.LastIndexOfFunc(func(a int) bool { return a == 10 })
+	assert.Equal(-1, i)
+
+	i = list.LastIndexOfFunc(func(a int) bool { return a == 4 })
+	assert.Equal(6, i)
+
+	i = list.LastIndexOfFunc(func(a int) bool { return a == 1 })
+	assert.Equal(0, i)
+}
+
+func TestContain(t *testing.T) {
+	assert := internal.NewAssert(t, "TestContain")
+
+	list := NewList([]int{1, 2, 3})
+	assert.Equal(true, list.Contain(1))
+	assert.Equal(false, list.Contain(0))
+}
+
+func TestPush(t *testing.T) {
+	assert := internal.NewAssert(t, "TestPush")
+
+	list := NewList([]int{1, 2, 3})
+	list.Push(4)
+
+	assert.Equal([]int{1, 2, 3, 4}, list.Data())
+}
+
+func TestInsertAtFirst(t *testing.T) {
+	assert := internal.NewAssert(t, "TestInsertAtFirst")
+
+	list := NewList([]int{1, 2, 3})
+	list.InsertAtFirst(0)
+
+	assert.Equal([]int{0, 1, 2, 3}, list.Data())
+}
+
+func TestInsertAtLast(t *testing.T) {
+	assert := internal.NewAssert(t, "TestInsertAtLast")
+
+	list := NewList([]int{1, 2, 3})
+	list.InsertAtLast(4)
+
+	assert.Equal([]int{1, 2, 3, 4}, list.Data())
+}
+
+func TestInsertAt(t *testing.T) {
+	assert := internal.NewAssert(t, "TestInsertAt")
+
+	list := NewList([]int{1, 2, 3})
+
+	list.InsertAt(-1, 0)
+	assert.Equal([]int{1, 2, 3}, list.Data())
+
+	list.InsertAt(4, 0)
+	assert.Equal([]int{1, 2, 3}, list.Data())
+
+	list.InsertAt(0, 0)
+	assert.Equal([]int{0, 1, 2, 3}, list.Data())
+
+	list.InsertAt(4, 4)
+	assert.Equal([]int{0, 1, 2, 3, 4}, list.Data())
+}
+
+func TestPopFirst(t *testing.T) {
+	assert := internal.NewAssert(t, "TestPopFirst")
+
+	list := NewList([]int{1, 2, 3})
+	v, ok := list.PopFirst()
+	assert.Equal(1, *v)
+	assert.Equal(true, ok)
+	assert.Equal([]int{2, 3}, list.Data())
+
+	list2 := NewList([]int{})
+	_, ok = list2.PopFirst()
+	assert.Equal(false, ok)
+	assert.Equal([]int{}, list2.Data())
+}
+
+func TestPopLast(t *testing.T) {
+	assert := internal.NewAssert(t, "TestPopLast")
+
+	list := NewList([]int{1, 2, 3})
+	v, ok := list.PopLast()
+	assert.Equal(3, *v)
+	assert.Equal(true, ok)
+	assert.Equal([]int{1, 2}, list.Data())
+
+	list2 := NewList([]int{})
+	_, ok = list2.PopLast()
+	assert.Equal(false, ok)
+	assert.Equal([]int{}, list2.Data())
+}
+
+func TestDeleteAt(t *testing.T) {
+	assert := internal.NewAssert(t, "TestDeleteAt")
+
+	list := NewList([]int{1, 2, 3, 4})
+
+	list.DeleteAt(-1)
+	assert.Equal([]int{1, 2, 3, 4}, list.Data())
+
+	list.DeleteAt(4)
+	assert.Equal([]int{1, 2, 3, 4}, list.Data())
+
+	list.DeleteAt(0)
+	assert.Equal([]int{2, 3, 4}, list.Data())
+
+	list.DeleteAt(2)
+	assert.Equal([]int{2, 3}, list.Data())
+}
+
+func TestUpdateAt(t *testing.T) {
+	assert := internal.NewAssert(t, "TestUpdateAt")
+
+	list := NewList([]int{1, 2, 3, 4})
+
+	list.UpdateAt(-1, 0)
+	assert.Equal([]int{1, 2, 3, 4}, list.Data())
+
+	list.UpdateAt(4, 0)
+	assert.Equal([]int{1, 2, 3, 4}, list.Data())
+
+	list.UpdateAt(0, 5)
+	assert.Equal([]int{5, 2, 3, 4}, list.Data())
+
+	list.UpdateAt(3, 1)
+	assert.Equal([]int{5, 2, 3, 1}, list.Data())
+}
+
+func TestEqual(t *testing.T) {
+	assert := internal.NewAssert(t, "TestEqual")
+
+	list1 := NewList([]int{1, 2, 3, 4})
+	list2 := NewList([]int{1, 2, 3, 4})
+	list3 := NewList([]int{1, 2, 3})
+
+	assert.Equal(true, list1.Equal(list2))
+	assert.Equal(false, list1.Equal(list3))
+}
+
+func TestIsEmpty(t *testing.T) {
+	assert := internal.NewAssert(t, "TestIsEmpty")
+
+	list1 := NewList([]int{1, 2, 3, 4})
+	list2 := NewList([]int{})
+
+	assert.Equal(false, list1.IsEmpty())
+	assert.Equal(true, list2.IsEmpty())
+}
+
+func TestIsClear(t *testing.T) {
+	assert := internal.NewAssert(t, "TestIsClear")
+
+	list1 := NewList([]int{1, 2, 3, 4})
+	list1.Clear()
+	empty := NewList([]int{})
+
+	assert.Equal(empty, list1)
+}
+
+func TestClone(t *testing.T) {
+	assert := internal.NewAssert(t, "TestClone")
+
+	list1 := NewList([]int{1, 2, 3, 4})
+	list2 := list1.Clone()
+
+	assert.Equal(true, list1.Equal(list2))
+}
+
+func TestMerge(t *testing.T) {
+	assert := internal.NewAssert(t, "TestMerge")
+
+	list1 := NewList([]int{1, 2, 3, 4})
+	list2 := NewList([]int{4, 5, 6})
+	expected := NewList([]int{1, 2, 3, 4, 4, 5, 6})
+
+	list3 := list1.Merge(list2)
+	assert.Equal(true, expected.Equal(list3))
+}
+
+func TestSize(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSize")
+
+	list := NewList([]int{1, 2, 3, 4})
+	empty := NewList([]int{})
+
+	assert.Equal(4, list.Size())
+	assert.Equal(0, empty.Size())
+}
+
+func TestCap(t *testing.T) {
+	assert := internal.NewAssert(t, "TestCap")
+
+	data := make([]int, 0, 100)
+	list := NewList(data)
+	assert.Equal(100, list.Cap())
+
+	data = make([]int, 0)
+	list = NewList(data)
+	assert.Equal(0, list.Cap())
+}
+
+func TestSwap(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSwap")
+
+	list := NewList([]int{1, 2, 3, 4})
+	expected := NewList([]int{4, 2, 3, 1})
+
+	list.Swap(0, 3)
+
+	assert.Equal(true, expected.Equal(list))
+}
+
+func TestReverse(t *testing.T) {
+	assert := internal.NewAssert(t, "TestReverse")
+
+	list := NewList([]int{1, 2, 3, 4})
+	expected := NewList([]int{4, 3, 2, 1})
+
+	list.Reverse()
+
+	assert.Equal(true, expected.Equal(list))
+}
+
+func TestUnique(t *testing.T) {
+	assert := internal.NewAssert(t, "TestUnique")
+
+	list := NewList([]int{1, 2, 2, 3, 4})
+	expected := NewList([]int{1, 2, 3, 4})
+
+	list.Unique()
+
+	assert.Equal(true, expected.Equal(list))
+}
+
+func TestUnion(t *testing.T) {
+	assert := internal.NewAssert(t, "TestUnion")
+
+	list1 := NewList([]int{1, 2, 3, 4})
+	list2 := NewList([]int{4, 5, 6})
+	expected := NewList([]int{1, 2, 3, 4, 5, 6})
+
+	list3 := list1.Union(list2)
+	assert.Equal(true, expected.Equal(list3))
+}
+
+func TestIntersection(t *testing.T) {
+	assert := internal.NewAssert(t, "TestIntersection")
+
+	list1 := NewList([]int{1, 2, 3, 4})
+	list2 := NewList([]int{4, 5, 6})
+	expected := NewList([]int{4})
+
+	list3 := list1.Intersection(list2)
+	assert.Equal(true, expected.Equal(list3))
+}
+
+func TestSubSlice(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSubSlice")
+
+	list := NewList([]int{1, 2, 3, 4, 5, 8})
+	subList := list.SubList(2, 5)
+
+	assert.Equal([]int{3, 4, 5}, subList.Data())
+}
+
+func BenchmarkSubSlice(b *testing.B) {
+	list := NewList([]int{1, 2, 3, 4, 5, 8})
+	for n := 0; n < b.N; n++ {
+		list.SubList(2, 5)
+	}
+}
+
+func TestDeleteIf(t *testing.T) {
+	assert := internal.NewAssert(t, "TestDeleteIf")
+
+	list := NewList([]int{1, 1, 1, 1, 2, 3, 1, 1, 4, 1, 1, 1, 1, 1, 1})
+
+	count := list.DeleteIf(func(a int) bool { return a == 1 })
+	assert.Equal([]int{2, 3, 4}, list.Data())
+	assert.Equal(12, count)
+
+	count = list.DeleteIf(func(a int) bool { return a == 5 })
+	assert.Equal([]int{2, 3, 4}, list.Data())
+	assert.Equal(0, count)
+}

datastructure/node.go

@@ -0,0 +1,51 @@
+// Copyright 2021 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package datastructure implements some data structure. eg. list, linklist, stack, queue, tree, graph.
+package datastructure
+
+// LinkNode is a linkedlist node, which have a Value and Pre points to previous node, Next points to a next node of the link.
+type LinkNode[T any] struct {
+	Value T
+	Pre   *LinkNode[T]
+	Next  *LinkNode[T]
+}
+
+// NewLinkNode return a LinkNode pointer
+func NewLinkNode[T any](value T) *LinkNode[T] {
+	return &LinkNode[T]{value, nil, nil}
+}
+
+// StackNode is a node in stack, which have a Value and Next pointer points to next node in the stack.
+type StackNode[T any] struct {
+	Value T
+	Next  *StackNode[T]
+}
+
+// NewStackNode return a StackNode pointer
+func NewStackNode[T any](value T) *StackNode[T] {
+	return &StackNode[T]{value, nil}
+}
+
+// QueueNode is a node in a queue, which have a Value and Next pointer points to next node in the queue.
+type QueueNode[T any] struct {
+	Value T
+	Next  *QueueNode[T]
+}
+
+// NewQueueNode return a QueueNode pointer
+func NewQueueNode[T any](value T) *QueueNode[T] {
+	return &QueueNode[T]{value, nil}
+}
+
+// TreeNode is node of tree
+type TreeNode[T any] struct {
+	Value T
+	Left  *TreeNode[T]
+	Right *TreeNode[T]
+}
+
+// NewTreeNode return a TreeNode pointer
+func NewTreeNode[T any](val T) *TreeNode[T] {
+	return &TreeNode[T]{val, nil, nil}
+}

datastructure/queue/arrayqueue.go

@@ -0,0 +1,119 @@
+package datastructure
+
+import (
+	"fmt"
+	"reflect"
+)
+
+// ArrayQueue implements queue with slice
+type ArrayQueue[T any] struct {
+	items    []T
+	head     int
+	tail     int
+	capacity int
+	size     int
+}
+
+func NewArrayQueue[T any](capacity int) *ArrayQueue[T] {
+	return &ArrayQueue[T]{
+		items:    make([]T, 0, capacity),
+		head:     0,
+		tail:     0,
+		capacity: capacity,
+		size:     0,
+	}
+}
+
+// Data return slice of queue data
+func (q *ArrayQueue[T]) Data() []T {
+	items := []T{}
+	for i := q.head; i < q.tail; i++ {
+		items = append(items, q.items[i])
+	}
+	return items
+}
+
+// Size return number of elements in queue
+func (q *ArrayQueue[T]) Size() int {
+	return q.size
+}
+
+// IsEmpty checks if queue is empty or not
+func (q *ArrayQueue[T]) IsEmpty() bool {
+	return q.size == 0
+}
+
+// IsFull checks if queue is full or not
+func (q *ArrayQueue[T]) IsFull() bool {
+	return q.size == q.capacity
+}
+
+// Front return front value of queue
+func (q *ArrayQueue[T]) Front() T {
+	return q.items[0]
+}
+
+// Back return back value of queue
+func (q *ArrayQueue[T]) Back() T {
+	return q.items[q.size-1]
+}
+
+// EnQueue put element into queue
+func (q *ArrayQueue[T]) Enqueue(item T) bool {
+	if q.head == 0 && q.tail == q.capacity {
+		return false
+	} else if q.head != 0 && q.tail == q.capacity {
+		for i := q.head; i < q.tail; i++ {
+			q.items[i-q.head] = q.items[i]
+		}
+		q.tail = q.tail - q.head
+		q.head = 0
+	}
+
+	q.items = append(q.items, item)
+	q.tail++
+	q.size++
+	return true
+}
+
+// DeQueue remove head element of queue and return it, if queue is empty, return nil and error
+func (q *ArrayQueue[T]) Dequeue() (T, bool) {
+	var item T
+	if q.head == q.tail {
+		return item, false
+	}
+	item = q.items[q.head]
+	q.head++
+	q.size--
+	return item, true
+}
+
+// Clear the queue data
+func (q *ArrayQueue[T]) Clear() {
+	capacity := q.capacity
+	q.items = make([]T, 0, capacity)
+	q.head = 0
+	q.tail = 0
+	q.size = 0
+	q.capacity = capacity
+}
+
+// Contain checks if the value is in queue or not
+func (q *ArrayQueue[T]) Contain(value T) bool {
+	for _, v := range q.items {
+		if reflect.DeepEqual(v, value) {
+			return true
+		}
+	}
+	return false
+}
+
+// Print queue data
+func (q *ArrayQueue[T]) Print() {
+	info := "["
+	for i := q.head; i < q.tail; i++ {
+		info += fmt.Sprintf("%+v, ", q.items[i])
+	}
+	info += "]"
+	fmt.Println(info)
+}

datastructure/queue/arrayqueue_test.go

@@ -0,0 +1,113 @@
+package datastructure
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestArrayQueue_Enqueue(t *testing.T) {
+	assert := internal.NewAssert(t, "TestArrayQueue_Enqueue")
+
+	queue := NewArrayQueue[int](5)
+	queue.Enqueue(1)
+	queue.Enqueue(2)
+	queue.Enqueue(3)
+
+	expected := []int{1, 2, 3}
+	data := queue.Data()
+	size := queue.Size()
+
+	queue.Print()
+
+	assert.Equal(expected, data)
+	assert.Equal(3, size)
+}
+
+func TestArrayQueue_Dequeue(t *testing.T) {
+	assert := internal.NewAssert(t, "TestArrayQueue_Dequeue")
+
+	queue := NewArrayQueue[int](4)
+	queue.Enqueue(1)
+	queue.Enqueue(2)
+	queue.Enqueue(3)
+
+	val, ok := queue.Dequeue()
+	assert.Equal(true, ok)
+
+	queue.Print()
+	assert.Equal(1, val)
+	assert.Equal([]int{2, 3}, queue.Data())
+}
+
+func TestArrayQueue_Front(t *testing.T) {
+	assert := internal.NewAssert(t, "TestArrayQueue_Front")
+
+	queue := NewArrayQueue[int](4)
+	queue.Enqueue(1)
+	queue.Enqueue(2)
+	queue.Enqueue(3)
+
+	val := queue.Front()
+
+	queue.Print()
+
+	assert.Equal(1, val)
+	assert.Equal([]int{1, 2, 3}, queue.Data())
+}
+
+func TestArrayQueue_Back(t *testing.T) {
+	assert := internal.NewAssert(t, "TestArrayQueue_Back")
+
+	queue := NewArrayQueue[int](4)
+	queue.Enqueue(1)
+	queue.Enqueue(2)
+	queue.Enqueue(3)
+
+	val := queue.Back()
+
+	queue.Print()
+
+	assert.Equal(3, val)
+	assert.Equal([]int{1, 2, 3}, queue.Data())
+}
+
+func TestArrayQueue_Contain(t *testing.T) {
+	assert := internal.NewAssert(t, "TestArrayQueue_Contain")
+
+	queue := NewArrayQueue[int](4)
+	queue.Enqueue(1)
+	queue.Enqueue(2)
+	queue.Enqueue(3)
+
+	assert.Equal(true, queue.Contain(1))
+	assert.Equal(false, queue.Contain(4))
+}
+
+func TestArrayQueue_Clear(t *testing.T) {
+	assert := internal.NewAssert(t, "TestArrayQueue_Clear")
+
+	queue := NewArrayQueue[int](4)
+
+	assert.Equal(true, queue.IsEmpty())
+	assert.Equal(0, queue.Size())
+
+	queue.Enqueue(1)
+	assert.Equal(false, queue.IsEmpty())
+	assert.Equal(1, queue.Size())
+
+	queue.Clear()
+	assert.Equal(true, queue.IsEmpty())
+	assert.Equal(0, queue.Size())
+}
+
+func TestArrayQueue_IsFull(t *testing.T) {
+	assert := internal.NewAssert(t, "TestArrayQueue_IsFull")
+
+	queue := NewArrayQueue[int](3)
+	queue.Enqueue(1)
+	queue.Enqueue(2)
+	queue.Enqueue(3)
+
+	assert.Equal(true, queue.IsFull())
+}

datastructure/queue/circularqueue.go

@@ -0,0 +1,118 @@
+package datastructure
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+)
+
+// CircularQueue implements circular queue with slice,
+// last index of CircularQueue don't contain value, so acturl capacity is capacity - 1
+type CircularQueue[T any] struct {
+	data     []T
+	front    int
+	rear     int
+	capacity int
+}
+
+// NewCircularQueue return a empty CircularQueue pointer
+func NewCircularQueue[T any](capacity int) *CircularQueue[T] {
+	data := make([]T, capacity)
+	return &CircularQueue[T]{data: data, front: 0, rear: 0, capacity: capacity}
+}
+
+// Data return slice of queue data
+func (q *CircularQueue[T]) Data() []T {
+	data := []T{}
+
+	front := q.front
+	rear := q.rear
+	if front <= rear {
+		return q.data[front:rear]
+	}
+
+	data = append(data, q.data[front:]...)
+	data = append(data, q.data[0:rear]...)
+
+	return data
+}
+
+// Size return number of elements in circular queue
+func (q *CircularQueue[T]) Size() int {
+	if q.capacity == 0 {
+		return 0
+	}
+	return (q.rear - q.front + q.capacity) % q.capacity
+}
+
+// IsEmpty checks if queue is empty or not
+func (q *CircularQueue[T]) IsEmpty() bool {
+	return q.front == q.rear
+}
+
+// IsFull checks if queue is full or not
+func (q *CircularQueue[T]) IsFull() bool {
+	return (q.rear+1)%q.capacity == q.front
+}
+
+// Front return front value of queue
+func (q *CircularQueue[T]) Front() T {
+	return q.data[q.front]
+}
+
+// Back return back value of queue
+func (q *CircularQueue[T]) Back() T {
+	if q.rear-1 >= 0 {
+		return q.data[q.rear-1]
+	}
+	return q.data[q.capacity-1]
+}
+
+// Enqueue put element into queue
+func (q *CircularQueue[T]) Enqueue(value T) error {
+	if q.IsFull() {
+		return errors.New("queue is full!")
+	}
+
+	q.data[q.rear] = value
+	q.rear = (q.rear + 1) % q.capacity
+
+	return nil
+}
+
+// Dequeue remove head element of queue and return it, if queue is empty, return nil and error
+func (q *CircularQueue[T]) Dequeue() (*T, error) {
+	if q.IsEmpty() {
+		return nil, errors.New("queue is empty")
+	}
+
+	headItem := q.data[q.front]
+	var t T
+	q.data[q.front] = t
+	q.front = (q.front + 1) % q.capacity
+
+	return &headItem, nil
+}
+
+// Clear the queue data
+func (q *CircularQueue[T]) Clear() {
+	q.data = []T{}
+	q.front = 0
+	q.rear = 0
+	q.capacity = 0
+}
+
+// Contain checks if the value is in queue or not
+func (q *CircularQueue[T]) Contain(value T) bool {
+	for _, v := range q.data {
+		if reflect.DeepEqual(v, value) {
+			return true
+		}
+	}
+	return false
+}
+
+// Print queue data
+func (q *CircularQueue[T]) Print() {
+	fmt.Printf("%+v\n", q)
+}

datastructure/queue/circularqueue_test.go

@@ -0,0 +1,148 @@
+package datastructure
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestCircularQueue_Enqueue(t *testing.T) {
+	assert := internal.NewAssert(t, "TestCircularQueue_Enqueue")
+
+	queue := NewCircularQueue[int](6)
+	queue.Enqueue(1)
+	queue.Enqueue(2)
+	queue.Enqueue(3)
+	queue.Enqueue(4)
+	queue.Enqueue(5)
+
+	queue.Print()
+	assert.Equal([]int{1, 2, 3, 4, 5}, queue.Data())
+	assert.Equal(5, queue.Size())
+
+	err := queue.Enqueue(6)
+	assert.IsNotNil(err)
+}
+
+func TestCircularQueue_Dequeue(t *testing.T) {
+	assert := internal.NewAssert(t, "TestCircularQueue_DeQueue")
+
+	queue := NewCircularQueue[int](6)
+	assert.Equal(true, queue.IsEmpty())
+
+	queue.Enqueue(1)
+	queue.Enqueue(2)
+	queue.Enqueue(3)
+	queue.Enqueue(4)
+	queue.Enqueue(5)
+
+	val, err := queue.Dequeue()
+	assert.IsNil(err)
+
+	assert.Equal(1, *val)
+	assert.Equal(false, queue.IsFull())
+
+	val, _ = queue.Dequeue()
+	queue.Print()
+	assert.Equal(2, *val)
+
+	queue.Enqueue(6)
+	queue.Print()
+	assert.Equal(false, queue.IsFull())
+}
+
+func TestCircularQueue_Front(t *testing.T) {
+	assert := internal.NewAssert(t, "TestCircularQueue_Front")
+
+	queue := NewCircularQueue[int](6)
+	queue.Enqueue(1)
+	queue.Enqueue(2)
+	queue.Enqueue(3)
+	queue.Enqueue(4)
+	queue.Enqueue(5)
+
+	queue.Print()
+
+	queue.Dequeue()
+	queue.Dequeue()
+	queue.Enqueue(6)
+	queue.Enqueue(7)
+
+	queue.Print()
+
+	val := queue.Front()
+	assert.Equal(3, val)
+	assert.Equal(5, queue.Size())
+}
+
+func TestCircularQueue_Back(t *testing.T) {
+	assert := internal.NewAssert(t, "TestCircularQueue_Back")
+
+	queue := NewCircularQueue[int](6)
+	assert.Equal(true, queue.IsEmpty())
+
+	queue.Enqueue(1)
+	queue.Enqueue(2)
+	queue.Enqueue(3)
+	queue.Enqueue(4)
+	queue.Enqueue(5)
+
+	queue.Print()
+	assert.Equal(5, queue.Back())
+
+	queue.Dequeue()
+	queue.Dequeue()
+	queue.Enqueue(6)
+	queue.Enqueue(7)
+
+	queue.Print()
+	assert.Equal(7, queue.Back())
+}
+
+func TestCircularQueue_Contain(t *testing.T) {
+	assert := internal.NewAssert(t, "TestCircularQueue_Contain")
+
+	queue := NewCircularQueue[int](2)
+	queue.Enqueue(1)
+	assert.Equal(true, queue.Contain(1))
+	assert.Equal(false, queue.Contain(2))
+}
+
+func TestCircularQueue_Clear(t *testing.T) {
+	assert := internal.NewAssert(t, "TestCircularQueue_Clear")
+
+	queue := NewCircularQueue[int](3)
+	assert.Equal(true, queue.IsEmpty())
+	assert.Equal(0, queue.Size())
+
+	queue.Enqueue(1)
+	assert.Equal(false, queue.IsEmpty())
+	assert.Equal(1, queue.Size())
+
+	queue.Clear()
+	assert.Equal(true, queue.IsEmpty())
+	assert.Equal(0, queue.Size())
+}
+
+func TestCircularQueue_Data(t *testing.T) {
+	assert := internal.NewAssert(t, "TestCircularQueue_Data")
+
+	queue := NewCircularQueue[int](6)
+	queue.Enqueue(1)
+	queue.Enqueue(2)
+	queue.Enqueue(3)
+	queue.Enqueue(4)
+	queue.Enqueue(5)
+
+	queue.Print()
+	assert.Equal([]int{1, 2, 3, 4, 5}, queue.Data())
+
+	queue.Dequeue()
+	queue.Dequeue()
+	queue.Enqueue(6)
+	queue.Enqueue(7)
+
+	queue.Print()
+	assert.Equal([]int{3, 4, 5, 6, 7}, queue.Data())
+
+}

datastructure/queue/linkedqueue.go

@@ -0,0 +1,117 @@
+package datastructure
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+
+	"github.com/duke-git/lancet/v2/datastructure"
+)
+
+// LinkedQueue implements queue with link list
+type LinkedQueue[T any] struct {
+	head   *datastructure.QueueNode[T]
+	tail   *datastructure.QueueNode[T]
+	length int
+}
+
+// NewLinkedQueue return a empty LinkedQueue pointer
+func NewLinkedQueue[T any]() *LinkedQueue[T] {
+	return &LinkedQueue[T]{head: nil, tail: nil, length: 0}
+}
+
+// Data return slice of queue data
+func (q *LinkedQueue[T]) Data() []T {
+	res := []T{}
+	current := q.head
+
+	for current != nil {
+		res = append(res, current.Value)
+		current = current.Next
+	}
+	return res
+}
+
+// Size return length of queue data
+func (q *LinkedQueue[T]) Size() int {
+	return q.length
+}
+
+// IsEmpty checks if queue is empty or not
+func (q *LinkedQueue[T]) IsEmpty() bool {
+	return q.length == 0
+}
+
+// Enqueue put element into queue
+func (q *LinkedQueue[T]) Enqueue(value T) {
+	newNode := datastructure.NewQueueNode(value)
+
+	if q.IsEmpty() {
+		q.head = newNode
+		q.tail = newNode
+	} else {
+		q.tail.Next = newNode
+		q.tail = newNode
+	}
+	q.length++
+}
+
+// Dequeue delete head element of queue then return it, if queue is empty, return nil and error
+func (q *LinkedQueue[T]) Dequeue() (*T, error) {
+	if q.IsEmpty() {
+		return nil, errors.New("queue is empty")
+	}
+
+	head := q.head
+	q.head = q.head.Next
+	q.length--
+
+	return &head.Value, nil
+}
+
+// Front return front value of queue
+func (q *LinkedQueue[T]) Front() (*T, error) {
+	if q.IsEmpty() {
+		return nil, errors.New("queue is empty")
+	}
+	return &q.head.Value, nil
+}
+
+// Back return back value of queue
+func (q *LinkedQueue[T]) Back() (*T, error) {
+	if q.IsEmpty() {
+		return nil, errors.New("queue is empty")
+	}
+	return &q.tail.Value, nil
+}
+
+// Clear clear the queue data
+func (q *LinkedQueue[T]) Clear() {
+	q.head = nil
+	q.tail = nil
+	q.length = 0
+}
+
+// Print all nodes info of queue link
+func (q *LinkedQueue[T]) Print() {
+	current := q.head
+	info := "[ "
+	for current != nil {
+		info += fmt.Sprintf("%+v, ", current)
+		current = current.Next
+	}
+	info += " ]"
+	fmt.Println(info)
+}
+
+// Contain checks if the value is in queue or not
+func (q *LinkedQueue[T]) Contain(value T) bool {
+	current := q.head
+	for current != nil {
+		if reflect.DeepEqual(current.Value, value) {
+			return true
+		}
+		current = current.Next
+	}
+	return false
+}

datastructure/queue/linkedqueue_test.go

@@ -0,0 +1,97 @@
+package datastructure
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestLinkedQueue_Enqueue(t *testing.T) {
+	assert := internal.NewAssert(t, "TestLinkedQueue_Enqueue")
+
+	queue := NewLinkedQueue[int]()
+	queue.Enqueue(1)
+	queue.Enqueue(2)
+	queue.Enqueue(3)
+
+	queue.Print()
+
+	assert.Equal([]int{1, 2, 3}, queue.Data())
+	assert.Equal(3, queue.Size())
+}
+
+func TestLinkedQueue_Dequeue(t *testing.T) {
+	assert := internal.NewAssert(t, "TestLinkedQueue_DeQueue")
+
+	queue := NewLinkedQueue[int]()
+	queue.Enqueue(1)
+	queue.Enqueue(2)
+	queue.Enqueue(3)
+
+	val, _ := queue.Dequeue()
+
+	queue.Print()
+
+	assert.Equal([]int{2, 3}, queue.Data())
+	assert.Equal(1, *val)
+}
+
+func TestLinkedQueue_Front(t *testing.T) {
+	assert := internal.NewAssert(t, "TestLinkedQueue_Front")
+
+	queue := NewLinkedQueue[int]()
+	_, err := queue.Front()
+	assert.IsNotNil(err)
+
+	queue.Enqueue(1)
+	queue.Enqueue(2)
+	queue.Enqueue(3)
+
+	val, err := queue.Front()
+	assert.Equal(1, *val)
+	assert.IsNil(err)
+}
+
+func TestLinkedQueue_Back(t *testing.T) {
+	assert := internal.NewAssert(t, "TestLinkedQueue_Back")
+
+	queue := NewLinkedQueue[int]()
+	_, err := queue.Back()
+	assert.IsNotNil(err)
+
+	queue.Enqueue(1)
+	queue.Enqueue(2)
+	queue.Enqueue(3)
+
+	val, err := queue.Back()
+	assert.Equal(3, *val)
+	assert.IsNil(err)
+}
+
+func TestLinkedQueue_Clear(t *testing.T) {
+	assert := internal.NewAssert(t, "TestLinkedQueue_Back")
+
+	queue := NewLinkedQueue[int]()
+	assert.Equal(true, queue.IsEmpty())
+
+	queue.Enqueue(1)
+	queue.Enqueue(2)
+	queue.Enqueue(3)
+	assert.Equal(false, queue.IsEmpty())
+
+	queue.Clear()
+	assert.Equal(true, queue.IsEmpty())
+}
+
+func TestLinkedQueue_Contain(t *testing.T) {
+	assert := internal.NewAssert(t, "TestLinkedQueue_Contain")
+
+	queue := NewLinkedQueue[int]()
+
+	queue.Enqueue(1)
+	queue.Enqueue(2)
+	queue.Enqueue(3)
+
+	assert.Equal(true, queue.Contain(1))
+	assert.Equal(false, queue.Contain(4))
+}

datastructure/queue/priorityqueue.go

@@ -0,0 +1,113 @@
+package datastructure
+
+import (
+	"errors"
+
+	"github.com/duke-git/lancet/v2/lancetconstraints"
+)
+
+// PriorityQueue is a priority queue implemented by binary heap tree
+// type T should implements Compare function in lancetconstraints.Comparator interface.
+type PriorityQueue[T any] struct {
+	items      []T
+	size       int
+	comparator lancetconstraints.Comparator
+}
+
+// NewPriorityQueue return a pointer of PriorityQueue
+// param `comparator` is used to compare values in the queue
+func NewPriorityQueue[T any](capacity int, comparator lancetconstraints.Comparator) *PriorityQueue[T] {
+	return &PriorityQueue[T]{
+		items:      make([]T, capacity+1),
+		size:       0,
+		comparator: comparator,
+	}
+}
+
+// IsEmpty checks if the queue is empty or not
+func (q *PriorityQueue[T]) IsEmpty() bool {
+	return q.size == 0
+}
+
+// Size get number of items in the queue
+func (q *PriorityQueue[T]) Size() int {
+	return q.size
+}
+
+// IsFull checks if the queue capacity is full or not
+func (q *PriorityQueue[T]) IsFull() bool {
+	return q.size == len(q.items)-1
+}
+
+// Data return a slice of queue data
+func (q *PriorityQueue[T]) Data() []T {
+	data := make([]T, q.size)
+	for i := 1; i < q.size+1; i++ {
+		data[i-1] = q.items[i]
+	}
+
+	return data
+}
+
+// Enqueue insert value into queue
+func (q *PriorityQueue[T]) Enqueue(val T) error {
+	if q.IsFull() {
+		return errors.New("queue is already full.")
+	}
+	q.size++
+	q.items[q.size] = val
+	q.swim(q.size)
+	return nil
+}
+
+// Dequeue delete and return max value in queue
+func (q *PriorityQueue[T]) Dequeue() (T, bool) {
+	var val T
+	if q.IsEmpty() {
+		return val, false
+	}
+
+	max := q.items[1]
+
+	q.swap(1, q.size)
+	q.size--
+	q.sink(1)
+
+	//set zero value for rest values of the queue
+	q.items[q.size+1] = val
+
+	return max, true
+}
+
+// swim when child's key is larger than parent's key, exchange them.
+func (q *PriorityQueue[T]) swim(index int) {
+	for index > 1 && q.comparator.Compare(q.items[index/2], q.items[index]) < 0 {
+		q.swap(index, index/2)
+		index = index / 2
+	}
+}
+
+// sink when parent's key smaller than child's key, exchange parent's key with larger child's key.
+func (q *PriorityQueue[T]) sink(index int) {
+
+	for 2*index <= q.size {
+		j := 2 * index
+
+		// get larger child node index
+		if j < q.size && q.comparator.Compare(q.items[j], q.items[j+1]) < 0 {
+			j++
+		}
+		// if parent larger than child, stop
+		if !(q.comparator.Compare(q.items[index], q.items[j]) < 0) {
+			break
+		}
+
+		q.swap(index, j)
+		index = j
+	}
+}
+
+// swap the two values at index i and j
+func (q *PriorityQueue[T]) swap(i, j int) {
+	q.items[i], q.items[j] = q.items[j], q.items[i]
+}

datastructure/queue/priorityqueue_test.go

@@ -0,0 +1,64 @@
+package datastructure
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+func TestPriorityQueue_Enqueue(t *testing.T) {
+	assert := internal.NewAssert(t, "TestPriorityQueue_Enqueue")
+
+	comparator := &intComparator{}
+	pq := NewPriorityQueue[int](10, comparator)
+
+	assert.Equal(true, pq.IsEmpty())
+	assert.Equal(false, pq.IsFull())
+
+	for i := 1; i < 11; i++ {
+		pq.Enqueue(i)
+	}
+
+	assert.Equal(true, pq.IsFull())
+
+	queueData := pq.Data()
+	assert.Equal([]int{10, 9, 6, 7, 8, 2, 5, 1, 4, 3}, queueData)
+
+}
+
+func TestPriorityQueue_Dequeue(t *testing.T) {
+	assert := internal.NewAssert(t, "TestPriorityQueue_Dequeue")
+
+	comparator := &intComparator{}
+	pq := NewPriorityQueue[int](10, comparator)
+
+	_, ok := pq.Dequeue()
+	assert.Equal(false, ok)
+
+	for i := 1; i < 11; i++ {
+		pq.Enqueue(i)
+	}
+
+	assert.Equal(10, pq.Size())
+
+	val, ok := pq.Dequeue()
+	assert.Equal(true, ok)
+	assert.Equal(10, val)
+
+	assert.Equal([]int{9, 8, 6, 7, 3, 2, 5, 1, 4}, pq.Data())
+
+	assert.Equal(9, pq.Size())
+}

datastructure/set/set.go

@@ -0,0 +1,136 @@
+package datastructure
+
+// Set is a data container, like slice, but element of set is not duplicate
+type Set[T comparable] map[T]struct{}
+
+// NewSet return a instance of set
+func NewSet[T comparable](values ...T) Set[T] {
+	set := make(Set[T])
+	set.Add(values...)
+	return set
+}
+
+// Add value to set
+func (s Set[T]) Add(values ...T) {
+	for _, v := range values {
+		s[v] = struct{}{}
+	}
+}
+
+// Contain checks if set contains value or not
+func (s Set[T]) Contain(value T) bool {
+	_, ok := s[value]
+	return ok
+}
+
+// ContainAll checks if set contains other set
+func (s Set[T]) ContainAll(other Set[T]) bool {
+	for k := range other {
+		_, ok := s[k]
+		if !ok {
+			return false
+		}
+	}
+	return true
+}
+
+// Clone return a copy of set
+func (s Set[T]) Clone() Set[T] {
+	set := NewSet[T]()
+	set.Add(s.Values()...)
+	return set
+}
+
+// Delete value of set
+func (s Set[T]) Delete(values ...T) {
+	for _, v := range values {
+		delete(s, v)
+	}
+}
+
+// Equal checks if two set has same elements or not
+func (s Set[T]) Equal(other Set[T]) bool {
+	if s.Size() != other.Size() {
+		return false
+	}
+
+	return s.ContainAll(other) && other.ContainAll(s)
+}
+
+// Iterate call function by every element of set
+func (s Set[T]) Iterate(fn func(value T)) {
+	for v := range s {
+		fn(v)
+	}
+}
+
+// IsEmpty checks the set is empty or not
+func (s Set[T]) IsEmpty() bool {
+	return len(s) == 0
+}
+
+// Size get the number of elements in set
+func (s Set[T]) Size() int {
+	return len(s)
+}
+
+// Values return all values of set
+func (s Set[T]) Values() []T {
+	values := make([]T, 0, 0)
+
+	s.Iterate(func(value T) {
+		values = append(values, value)
+	})
+
+	return values
+}
+
+// Union creates a new set contain all element of set s and other
+func (s Set[T]) Union(other Set[T]) Set[T] {
+	set := s.Clone()
+	set.Add(other.Values()...)
+	return set
+}
+
+// Intersection creates a new set whose element both be contained in set s and other
+func (s Set[T]) Intersection(other Set[T]) Set[T] {
+	set := NewSet[T]()
+	s.Iterate(func(value T) {
+		if other.Contain(value) {
+			set.Add(value)
+		}
+	})
+
+	return set
+}
+
+// SymmetricDifference creates a new set whose element is in set1 or set2, but not in both sets
+func (s Set[T]) SymmetricDifference(other Set[T]) Set[T] {
+	set := NewSet[T]()
+	s.Iterate(func(value T) {
+		if !other.Contain(value) {
+			set.Add(value)
+		}
+	})
+
+	other.Iterate(func(value T) {
+		if !s.Contain(value) {
+			set.Add(value)
+		}
+	})
+
+	return set
+}
+
+// Minus creates an set of whose element in origin set but not in compared set
+func (s Set[T]) Minus(comparedSet Set[T]) Set[T] {
+	set := NewSet[T]()
+
+	s.Iterate(func(value T) {
+		if !comparedSet.Contain(value) {
+			set.Add(value)
+		}
+	})
+
+	return set
+}

datastructure/set/set_test.go

@@ -0,0 +1,149 @@
+package datastructure
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestSet_Add(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSet_Add")
+
+	set := NewSet[int]()
+	set.Add(1, 2, 3)
+
+	expected := NewSet(1, 2, 3)
+
+	assert.Equal(true, set.Equal(expected))
+}
+
+func TestSet_Contain(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSet_Contain")
+
+	set := NewSet[int]()
+	set.Add(1, 2, 3)
+
+	assert.Equal(true, set.Contain(1))
+	assert.Equal(false, set.Contain(4))
+}
+
+func TestSet_ContainAll(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSet_ContainAll")
+
+	set1 := NewSet(1, 2, 3)
+	set2 := NewSet(1, 2)
+	set3 := NewSet(1, 2, 3, 4)
+
+	assert.Equal(true, set1.ContainAll(set2))
+	assert.Equal(false, set1.ContainAll(set3))
+}
+
+func TestSet_Clone(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSet_Clone")
+
+	set1 := NewSet(1, 2, 3)
+	set2 := set1.Clone()
+
+	assert.Equal(true, set1.Size() == set2.Size())
+	assert.Equal(true, set1.ContainAll(set2))
+}
+
+func TestSet_Delete(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSet_Delete")
+
+	set := NewSet[int]()
+	set.Add(1, 2, 3)
+	set.Delete(3)
+
+	expected := NewSet(1, 2)
+
+	assert.Equal(true, set.Equal(expected))
+}
+
+func TestSet_Equal(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSet_Equal")
+
+	set1 := NewSet(1, 2, 3)
+	set2 := NewSet(1, 2, 3)
+	set3 := NewSet(1, 2, 3, 4)
+
+	assert.Equal(true, set1.Equal(set2))
+	assert.Equal(false, set1.Equal(set3))
+}
+
+func TestSet_Iterate(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSet_Iterate")
+
+	set := NewSet(1, 2, 3)
+	arr := []int{}
+	set.Iterate(func(value int) {
+		arr = append(arr, value)
+	})
+
+	assert.Equal(3, len(arr))
+}
+
+func TestSet_IsEmpty(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSet_IsEmpty")
+
+	set := NewSet[int]()
+	assert.Equal(true, set.IsEmpty())
+}
+
+func TestSet_Size(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSet_Size")
+
+	set := NewSet(1, 2, 3)
+	assert.Equal(3, set.Size())
+}
+
+func TestSet_Values(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSet_Values")
+
+	set := NewSet(1, 2, 3)
+	values := set.Values()
+
+	assert.Equal(3, len(values))
+}
+
+func TestSet_Union(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSet_Union")
+
+	set1 := NewSet(1, 2, 3)
+	set2 := NewSet(2, 3, 4, 5)
+	expected := NewSet(1, 2, 3, 4, 5)
+	unionSet := set1.Union(set2)
+
+	assert.Equal(expected, unionSet)
+}
+
+func TestSet_Intersection(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSet_Intersection")
+
+	set1 := NewSet(1, 2, 3)
+	set2 := NewSet(2, 3, 4, 5)
+	expected := NewSet(2, 3)
+	intersectionSet := set1.Intersection(set2)
+
+	assert.Equal(expected, intersectionSet)
+}
+
+func TestSet_SymmetricDifference(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSet_SymmetricDifference")
+
+	set1 := NewSet(1, 2, 3)
+	set2 := NewSet(2, 3, 4, 5)
+
+	assert.Equal(NewSet(1, 4, 5), set1.SymmetricDifference(set2))
+}
+
+func TestSet_Minus(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSet_Minus")
+
+	set1 := NewSet(1, 2, 3)
+	set2 := NewSet(2, 3, 4, 5)
+	set3 := NewSet(2, 3)
+
+	assert.Equal(NewSet(1), set1.Minus(set2))
+	assert.Equal(NewSet(4, 5), set2.Minus(set3))
+}

datastructure/stack/arraystack.go

@@ -0,0 +1,62 @@
+package datastructure
+
+import "errors"
+
+// ArrayStack implements stack with slice
+type ArrayStack[T any] struct {
+	data   []T
+	length int
+}
+
+// NewArrayStack return a empty ArrayStack pointer
+func NewArrayStack[T any]() *ArrayStack[T] {
+	return &ArrayStack[T]{data: []T{}, length: 0}
+}
+
+// Data return stack data
+func (s *ArrayStack[T]) Data() []T {
+	return s.data
+}
+
+// Size return length of stack data
+func (s *ArrayStack[T]) Size() int {
+	return s.length
+}
+
+// IsEmpty checks if stack is empty or not
+func (s *ArrayStack[T]) IsEmpty() bool {
+	return s.length == 0
+}
+
+// Push element into stack
+func (s *ArrayStack[T]) Push(value T) {
+	s.data = append([]T{value}, s.data...)
+	s.length++
+}
+
+// Pop delete the top element of stack then return it, if stack is empty, return nil and error
+func (s *ArrayStack[T]) Pop() (*T, error) {
+	if s.IsEmpty() {
+		return nil, errors.New("stack is empty")
+	}
+
+	topItem := s.data[0]
+	s.data = s.data[1:]
+	s.length--
+
+	return &topItem, nil
+}
+
+// Peak return the top element of stack
+func (s *ArrayStack[T]) Peak() (*T, error) {
+	if s.IsEmpty() {
+		return nil, errors.New("stack is empty")
+	}
+	return &s.data[0], nil
+}
+
+// Clear the stack data
+func (s *ArrayStack[T]) Clear() {
+	s.data = []T{}
+	s.length = 0
+}

datastructure/stack/arraystack_test.go

@@ -0,0 +1,77 @@
+package datastructure
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestArrayStack_Push(t *testing.T) {
+	assert := internal.NewAssert(t, "TestArrayStack_Push")
+
+	stack := NewArrayStack[int]()
+	stack.Push(1)
+	stack.Push(2)
+	stack.Push(3)
+
+	expected := []int{3, 2, 1}
+	values := stack.Data()
+	length := stack.Size()
+
+	assert.Equal(expected, values)
+	assert.Equal(3, length)
+}
+
+func TestArrayStack_Pop(t *testing.T) {
+	assert := internal.NewAssert(t, "TestArrayStack_Pop")
+
+	stack := NewArrayStack[int]()
+	_, err := stack.Pop()
+	assert.IsNotNil(err)
+
+	stack.Push(1)
+	stack.Push(2)
+	stack.Push(3)
+
+	topItem, err := stack.Pop()
+	assert.IsNil(err)
+	assert.Equal(3, *topItem)
+
+	expected := []int{2, 1}
+	assert.Equal(expected, stack.Data())
+}
+
+func TestArrayStack_Peak(t *testing.T) {
+	assert := internal.NewAssert(t, "TestArrayStack_Peak")
+
+	stack := NewArrayStack[int]()
+	_, err := stack.Peak()
+	assert.IsNotNil(err)
+
+	stack.Push(1)
+	stack.Push(2)
+	stack.Push(3)
+
+	topItem, err := stack.Peak()
+	assert.IsNil(err)
+	assert.Equal(3, *topItem)
+
+	expected := []int{3, 2, 1}
+	assert.Equal(expected, stack.Data())
+}
+
+func TestArrayStack_Clear(t *testing.T) {
+	assert := internal.NewAssert(t, "TestArrayStack_Clear")
+
+	stack := NewArrayStack[int]()
+	assert.Equal(true, stack.IsEmpty())
+	assert.Equal(0, stack.Size())
+
+	stack.Push(1)
+	assert.Equal(false, stack.IsEmpty())
+	assert.Equal(1, stack.Size())
+
+	stack.Clear()
+	assert.Equal(true, stack.IsEmpty())
+	assert.Equal(0, stack.Size())
+}

datastructure/stack/linkedstack.go

@@ -0,0 +1,94 @@
+package datastructure
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/duke-git/lancet/v2/datastructure"
+)
+
+// LinkedStack implements stack with link list
+type LinkedStack[T any] struct {
+	top    *datastructure.StackNode[T]
+	length int
+}
+
+// NewLinkedStack return a empty LinkedStack pointer
+func NewLinkedStack[T any]() *LinkedStack[T] {
+	return &LinkedStack[T]{top: nil, length: 0}
+}
+
+// Data return stack data
+func (s *LinkedStack[T]) Data() []T {
+	res := []T{}
+	current := s.top
+
+	for current != nil {
+		res = append(res, current.Value)
+		current = current.Next
+	}
+	return res
+}
+
+// Size return length of stack data
+func (s *LinkedStack[T]) Size() int {
+	return s.length
+}
+
+// IsEmpty checks if stack is empty or not
+func (s *LinkedStack[T]) IsEmpty() bool {
+	return s.length == 0
+}
+
+// Push element into stack
+func (s *LinkedStack[T]) Push(value T) {
+	newNode := datastructure.NewStackNode(value)
+	top := s.top
+	if top == nil {
+		s.top = newNode
+	} else {
+		newNode.Next = top
+		s.top = newNode
+	}
+
+	s.length++
+}
+
+// Pop delete the top element of stack then return it, if stack is empty, return nil and error
+func (s *LinkedStack[T]) Pop() (*T, error) {
+	if s.IsEmpty() {
+		return nil, errors.New("stack is empty")
+	}
+
+	top := s.top
+	s.top = s.top.Next
+	s.length--
+
+	return &top.Value, nil
+}
+
+// Peak return the top element of stack then return it
+func (s *LinkedStack[T]) Peak() (*T, error) {
+	if s.IsEmpty() {
+		return nil, errors.New("stack is empty")
+	}
+	return &s.top.Value, nil
+}
+
+// Clear clear the stack data
+func (s *LinkedStack[T]) Clear() {
+	s.top = nil
+	s.length = 0
+}
+
+// Print all nodes info of stack link
+func (s *LinkedStack[T]) Print() {
+	current := s.top
+	info := "[ "
+	for current != nil {
+		info += fmt.Sprintf("%+v, ", current)
+		current = current.Next
+	}
+	info += " ]"
+	fmt.Println(info)
+}

datastructure/stack/linkedstack_test.go

@@ -0,0 +1,80 @@
+package datastructure
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestLinkedStack_Push(t *testing.T) {
+	assert := internal.NewAssert(t, "TestLinkedStack_Push")
+
+	stack := NewLinkedStack[int]()
+	stack.Push(1)
+	stack.Push(2)
+	stack.Push(3)
+
+	stack.Print()
+
+	expected := []int{3, 2, 1}
+	values := stack.Data()
+	size := stack.Size()
+
+	assert.Equal(expected, values)
+	assert.Equal(3, size)
+}
+
+func TestLinkedStack_Pop(t *testing.T) {
+	assert := internal.NewAssert(t, "TestLinkedStack_Pop")
+
+	stack := NewLinkedStack[int]()
+	_, err := stack.Pop()
+	assert.IsNotNil(err)
+
+	stack.Push(1)
+	stack.Push(2)
+	stack.Push(3)
+
+	topItem, err := stack.Pop()
+	assert.IsNil(err)
+	assert.Equal(3, *topItem)
+
+	expected := []int{2, 1}
+	stack.Print()
+	assert.Equal(expected, stack.Data())
+}
+
+func TestLinkedStack_Peak(t *testing.T) {
+	assert := internal.NewAssert(t, "TestLinkedStack_Peak")
+
+	stack := NewLinkedStack[int]()
+	_, err := stack.Peak()
+	assert.IsNotNil(err)
+
+	stack.Push(1)
+	stack.Push(2)
+	stack.Push(3)
+
+	topItem, err := stack.Peak()
+	assert.IsNil(err)
+	assert.Equal(3, *topItem)
+
+	expected := []int{3, 2, 1}
+	assert.Equal(expected, stack.Data())
+}
+
+func TestLinkedStack_Empty(t *testing.T) {
+	assert := internal.NewAssert(t, "TestLinkedStack_Empty")
+
+	stack := NewLinkedStack[int]()
+	assert.Equal(true, stack.IsEmpty())
+	assert.Equal(0, stack.Size())
+
+	stack.Push(1)
+	assert.Equal(false, stack.IsEmpty())
+	assert.Equal(1, stack.Size())
+
+	stack.Clear()
+	assert.Equal(true, stack.IsEmpty())
+	assert.Equal(0, stack.Size())
+}

datastructure/tree/bstree.go

@@ -0,0 +1,108 @@
+package datastructure
+
+import (
+	"math"
+
+	"github.com/duke-git/lancet/v2/datastructure"
+	"github.com/duke-git/lancet/v2/lancetconstraints"
+)
+
+// BSTree is a binary search tree data structure in which each node has at most two children,
+// which are referred to as the left child and the right child.
+// In BSTree: leftNode < rootNode < rightNode
+// type T should implements Compare function in lancetconstraints.Comparator interface.
+type BSTree[T any] struct {
+	root       *datastructure.TreeNode[T]
+	comparator lancetconstraints.Comparator
+}
+
+// NewBSTree create a BSTree pointer
+// param `comparator` is used to compare values in the tree
+func NewBSTree[T any](rootData T, comparator lancetconstraints.Comparator) *BSTree[T] {
+	root := datastructure.NewTreeNode(rootData)
+	return &BSTree[T]{root, comparator}
+}
+
+// InsertNode insert data into BSTree
+func (t *BSTree[T]) Insert(data T) {
+	root := t.root
+	newNode := datastructure.NewTreeNode(data)
+	if root == nil {
+		t.root = newNode
+	} else {
+		insertTreeNode(root, newNode, t.comparator)
+	}
+}
+
+// DeletetNode delete data into BSTree
+func (t *BSTree[T]) Delete(data T) {
+	deleteTreeNode(t.root, data, t.comparator)
+}
+
+// NodeLevel get node level in BSTree
+func (t *BSTree[T]) NodeLevel(node *datastructure.TreeNode[T]) int {
+	if node == nil {
+		return 0
+	}
+	left := float64(t.NodeLevel(node.Left))
+	right := float64(t.NodeLevel(node.Right))
+
+	return int(math.Max(left, right)) + 1
+}
+
+// PreOrderTraverse traverse tree node in pre order
+func (t *BSTree[T]) PreOrderTraverse() []T {
+	return preOrderTraverse(t.root)
+}
+
+// PostOrderTraverse traverse tree node in post order
+func (t *BSTree[T]) PostOrderTraverse() []T {
+	return postOrderTraverse(t.root)
+}
+
+// InOrderTraverse traverse tree node in mid order
+func (t *BSTree[T]) InOrderTraverse() []T {
+	return inOrderTraverse(t.root)
+}
+
+// LevelOrderTraverse traverse tree node in level order
+func (t *BSTree[T]) LevelOrderTraverse() []T {
+	traversal := make([]T, 0)
+	levelOrderTraverse(t.root, &traversal)
+	return traversal
+}
+
+// Depth returns the calculated depth of a binary saerch tree
+func (t *BSTree[T]) Depth() int {
+	return calculateDepth(t.root, 0)
+}
+
+// IsSubTree checks if the tree `t` has `subTree` or not
+func (t *BSTree[T]) HasSubTree(subTree *BSTree[T]) bool {
+	return hasSubTree(t.root, subTree.root, t.comparator)
+}
+
+func hasSubTree[T any](superTreeRoot, subTreeRoot *datastructure.TreeNode[T],
+	comparator lancetconstraints.Comparator) bool {
+	result := false
+
+	if superTreeRoot != nil && subTreeRoot != nil {
+		if comparator.Compare(superTreeRoot.Value, subTreeRoot.Value) == 0 {
+			result = isSubTree(superTreeRoot, subTreeRoot, comparator)
+		}
+		if !result {
+			result = hasSubTree(superTreeRoot.Left, subTreeRoot, comparator)
+		}
+		if !result {
+			result = hasSubTree(superTreeRoot.Right, subTreeRoot, comparator)
+		}
+	}
+	return result
+}
+
+// Print the bstree structure
+func (t *BSTree[T]) Print() {
+	maxLevel := t.NodeLevel(t.root)
+	nodes := []*datastructure.TreeNode[T]{t.root}
+	printTreeNodes(nodes, 1, maxLevel)
+}

datastructure/tree/bstree_test.go

@@ -0,0 +1,157 @@
+package datastructure
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func TestBSTree_Insert(t *testing.T) {
+	bstree := NewBSTree(6, &intComparator{})
+
+	bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+	bstree.Print()
+}
+
+func TestBSTree_PreOrderTraverse(t *testing.T) {
+	assert := internal.NewAssert(t, "TestBSTree_PreOrderTraverse")
+
+	bstree := NewBSTree(6, &intComparator{})
+
+	bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+	acturl := bstree.PreOrderTraverse()
+	t.Log(acturl)
+	assert.Equal([]int{6, 5, 2, 4, 7}, acturl)
+}
+
+func TestBSTree_PostOrderTraverse(t *testing.T) {
+	assert := internal.NewAssert(t, "TestBSTree_PostOrderTraverse")
+
+	bstree := NewBSTree(6, &intComparator{})
+
+	bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+	acturl := bstree.PostOrderTraverse()
+	t.Log(acturl)
+	assert.Equal([]int{5, 2, 4, 7, 6}, acturl)
+}
+
+func TestBSTree_InOrderTraverse(t *testing.T) {
+	assert := internal.NewAssert(t, "TestBSTree_InOrderTraverse")
+
+	bstree := NewBSTree(6, &intComparator{})
+
+	bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+	acturl := bstree.InOrderTraverse()
+	t.Log(acturl)
+	assert.Equal([]int{2, 4, 5, 6, 7}, acturl)
+}
+
+func TestBSTree_LevelOrderTraverse(t *testing.T) {
+	assert := internal.NewAssert(t, "TestBSTree_LevelOrderTraverse")
+
+	bstree := NewBSTree(6, &intComparator{})
+
+	bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+	bstree.Print()
+
+	acturl := bstree.LevelOrderTraverse()
+	t.Log(acturl)
+	assert.Equal([]int{6, 5, 7, 2, 4}, acturl)
+}
+
+func TestBSTree_Delete(t *testing.T) {
+	assert := internal.NewAssert(t, "TestBSTree_Delete")
+
+	bstree := NewBSTree(6, &intComparator{})
+
+	bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+	bstree.Print()
+
+	bstree.Delete(4)
+	bstree.Print()
+	acturl1 := bstree.InOrderTraverse()
+	t.Log(acturl1)
+	assert.Equal([]int{2, 5, 6, 7}, acturl1)
+
+	//todo
+	// bstree.DeletetNode(6, comparator)
+	// bstree.Print()
+	// acturl2 := bstree.InOrderTraverse()
+	// t.Log(acturl2)
+	// assert.Equal([]int{2, 5, 7}, acturl2)
+}
+
+func TestBSTree_Depth(t *testing.T) {
+	assert := internal.NewAssert(t, "TestBSTree_Depth")
+
+	bstree := NewBSTree(6, &intComparator{})
+
+	bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+	bstree.Print()
+
+	assert.Equal(bstree.Depth(), 4)
+}
+
+func TestBSTree_IsSubTree(t *testing.T) {
+	assert := internal.NewAssert(t, "TestBSTree_IsSubTree")
+
+	superTree := NewBSTree(8, &intComparator{})
+	superTree.Insert(4)
+	superTree.Insert(5)
+	superTree.Insert(6)
+	superTree.Insert(9)
+	superTree.Insert(4)
+
+	superTree.Print()
+
+	subTree := NewBSTree(5, &intComparator{})
+	subTree.Insert(4)
+	subTree.Insert(6)
+
+	subTree.Print()
+
+	assert.Equal(true, superTree.HasSubTree(subTree))
+	assert.Equal(false, subTree.HasSubTree(superTree))
+}

datastructure/tree/tree_internal.go

@@ -0,0 +1,238 @@
+package datastructure
+
+import (
+	"fmt"
+	"math"
+
+	"github.com/duke-git/lancet/v2/datastructure"
+	"github.com/duke-git/lancet/v2/lancetconstraints"
+)
+
+func preOrderTraverse[T any](node *datastructure.TreeNode[T]) []T {
+	data := []T{}
+	if node != nil {
+		data = append(data, node.Value)
+		data = append(data, preOrderTraverse(node.Left)...)
+		data = append(data, preOrderTraverse(node.Right)...)
+	}
+	return data
+}
+
+func postOrderTraverse[T any](node *datastructure.TreeNode[T]) []T {
+	data := []T{}
+	if node != nil {
+		data = append(data, preOrderTraverse(node.Left)...)
+		data = append(data, preOrderTraverse(node.Right)...)
+		data = append(data, node.Value)
+	}
+	return data
+}
+
+func inOrderTraverse[T any](node *datastructure.TreeNode[T]) []T {
+	data := []T{}
+	if node != nil {
+		data = append(data, inOrderTraverse(node.Left)...)
+		data = append(data, node.Value)
+		data = append(data, inOrderTraverse(node.Right)...)
+	}
+	return data
+}
+
+func preOrderPrint[T any](node *datastructure.TreeNode[T]) {
+	if node == nil {
+		return
+	}
+
+	fmt.Printf("%v, ", node.Value)
+	preOrderPrint(node.Left)
+	preOrderPrint(node.Right)
+}
+
+func postOrderPrint[T any](node *datastructure.TreeNode[T]) {
+	if node == nil {
+		return
+	}
+
+	preOrderPrint(node.Left)
+	preOrderPrint(node.Right)
+	fmt.Printf("%v, ", node.Value)
+}
+
+func inOrderPrint[T any](node *datastructure.TreeNode[T]) {
+	if node == nil {
+		return
+	}
+
+	inOrderPrint(node.Left)
+	fmt.Printf("%v, ", node.Value)
+	inOrderPrint(node.Right)
+}
+
+func levelOrderTraverse[T any](root *datastructure.TreeNode[T], traversal *[]T) {
+	var q []*datastructure.TreeNode[T] // queue
+	var n *datastructure.TreeNode[T]   // temp node
+
+	q = append(q, root)
+
+	for len(q) != 0 {
+		n, q = q[0], q[1:]
+		*traversal = append(*traversal, n.Value)
+		if n.Left != nil {
+			q = append(q, n.Left)
+		}
+		if n.Right != nil {
+			q = append(q, n.Right)
+		}
+	}
+}
+
+func insertTreeNode[T any](rootNode, newNode *datastructure.TreeNode[T], comparator lancetconstraints.Comparator) {
+	if comparator.Compare(newNode.Value, rootNode.Value) == -1 {
+		if rootNode.Left == nil {
+			rootNode.Left = newNode
+		} else {
+			insertTreeNode(rootNode.Left, newNode, comparator)
+		}
+	} else {
+		if rootNode.Right == nil {
+			rootNode.Right = newNode
+		} else {
+			insertTreeNode(rootNode.Right, newNode, comparator)
+		}
+	}
+}
+
+// todo, delete root node failed
+func deleteTreeNode[T any](node *datastructure.TreeNode[T], data T, comparator lancetconstraints.Comparator) *datastructure.TreeNode[T] {
+	if node == nil {
+		return nil
+	}
+	if comparator.Compare(data, node.Value) == -1 {
+		node.Left = deleteTreeNode(node.Left, data, comparator)
+	} else if comparator.Compare(data, node.Value) == 1 {
+		node.Right = deleteTreeNode(node.Right, data, comparator)
+	} else {
+		if node.Left == nil {
+			node = node.Right
+		} else if node.Right == nil {
+			node = node.Left
+		} else {
+			l := node.Right
+			d := inOrderSuccessor(l)
+			d.Left = node.Left
+			return node.Right
+		}
+	}
+
+	return node
+}
+
+func inOrderSuccessor[T any](root *datastructure.TreeNode[T]) *datastructure.TreeNode[T] {
+	cur := root
+	for cur.Left != nil {
+		cur = cur.Left
+	}
+	return cur
+}
+
+func printTreeNodes[T any](nodes []*datastructure.TreeNode[T], level, maxLevel int) {
+	if len(nodes) == 0 || isAllNil(nodes) {
+		return
+	}
+
+	floor := maxLevel - level
+	endgeLines := int(math.Pow(float64(2), (math.Max(float64(floor)-1, 0))))
+	firstSpaces := int(math.Pow(float64(2), float64(floor))) - 1
+	betweenSpaces := int(math.Pow(float64(2), float64(floor)+1)) - 1
+
+	printSpaces(firstSpaces)
+
+	newNodes := []*datastructure.TreeNode[T]{}
+	for _, node := range nodes {
+		if node != nil {
+			fmt.Printf("%v", node.Value)
+			newNodes = append(newNodes, node.Left)
+			newNodes = append(newNodes, node.Right)
+		} else {
+			newNodes = append(newNodes, nil)
+			newNodes = append(newNodes, nil)
+			printSpaces(1)
+		}
+
+		printSpaces(betweenSpaces)
+	}
+
+	fmt.Println("")
+
+	for i := 1; i <= endgeLines; i++ {
+		for j := 0; j < len(nodes); j++ {
+			printSpaces(firstSpaces - i)
+			if nodes[j] == nil {
+				printSpaces(endgeLines + endgeLines + i + 1)
+				continue
+			}
+
+			if nodes[j].Left != nil {
+				fmt.Print("/")
+			} else {
+				printSpaces(1)
+			}
+
+			printSpaces(i + i - 1)
+
+			if nodes[j].Right != nil {
+				fmt.Print("\\")
+			} else {
+				printSpaces(1)
+			}
+			printSpaces(endgeLines + endgeLines - 1)
+		}
+		fmt.Println("")
+	}
+
+	printTreeNodes(newNodes, level+1, maxLevel)
+}
+
+// printSpaces
+func printSpaces(n int) {
+	for i := 0; i < n; i++ {
+		fmt.Print(" ")
+	}
+}
+
+func isAllNil[T any](nodes []*datastructure.TreeNode[T]) bool {
+	for _, v := range nodes {
+		if v != nil {
+			return false
+		}
+	}
+	return true
+}
+
+func calculateDepth[T any](node *datastructure.TreeNode[T], depth int) int {
+	if node == nil {
+		return depth
+	}
+	return max(calculateDepth(node.Left, depth+1), calculateDepth(node.Right, depth+1))
+}
+
+func isSubTree[T any](superTreeRoot, subTreeRoot *datastructure.TreeNode[T], comparator lancetconstraints.Comparator) bool {
+	if subTreeRoot == nil {
+		return true
+	}
+	if superTreeRoot == nil {
+		return false
+	}
+	if comparator.Compare(superTreeRoot.Value, subTreeRoot.Value) != 0 {
+		return false
+	}
+	result := isSubTree(superTreeRoot.Left, subTreeRoot.Left, comparator) && isSubTree(superTreeRoot.Right, subTreeRoot.Right, comparator)
+	return result
+}
+
+func max(a, b int) int {
+	if a > b {
+		return a
+	}
+	return b
+}

datetime/conversion_test.go

@@ -3,7 +3,7 @@ package datetime
 import (
 	"testing"
 
-	"github.com/duke-git/lancet/internal"
+	"github.com/duke-git/lancet/v2/internal"
 )
 
 func TestToUnix(t *testing.T) {
@@ -19,10 +19,10 @@ func TestToUnix(t *testing.T) {
 func TestToFormat(t *testing.T) {
 	assert := internal.NewAssert(t, "TestToFormat")
 
-	tm, err := NewFormat("2022/03/18 17:04:05")
+	_, err := NewFormat("2022/03/18 17:04:05")
 	assert.IsNotNil(err)
 
-	tm, err = NewFormat("2022-03-18 17:04:05")
+	tm, err := NewFormat("2022-03-18 17:04:05")
 	assert.IsNil(err)
 
 	t.Log("ToFormat -> ", tm.ToFormat())
@@ -31,23 +31,22 @@ func TestToFormat(t *testing.T) {
 func TestToFormatForTpl(t *testing.T) {
 	assert := internal.NewAssert(t, "TestToFormatForTpl")
 
-	tm, err := NewFormat("2022/03/18 17:04:05")
+	_, err := NewFormat("2022/03/18 17:04:05")
 	assert.IsNotNil(err)
 
-	tm, err = NewFormat("2022-03-18 17:04:05")
+	tm, err := NewFormat("2022-03-18 17:04:05")
 	assert.IsNil(err)
 
 	t.Log("ToFormatForTpl -> ", tm.ToFormatForTpl("2006/01/02 15:04:05"))
-
 }
 
 func TestToIso8601(t *testing.T) {
 	assert := internal.NewAssert(t, "TestToIso8601")
 
-	tm, err := NewISO8601("2022-03-18 17:04:05")
+	_, err := NewISO8601("2022-03-18 17:04:05")
 	assert.IsNotNil(err)
 
-	tm, err = NewISO8601("2006-01-02T15:04:05.999Z")
+	tm, err := NewISO8601("2006-01-02T15:04:05.999Z")
 	assert.IsNil(err)
 
 	t.Log("ToIso8601 -> ", tm.ToIso8601())

datetime/datetime.go

@@ -3,36 +3,29 @@
 
 // Package datetime implements some functions to format date and time.
 // Note:
-// 1. `format` param in FormatTimeToStr function should be as flow (case no sensitive):
-// "yyyy-mm-dd hh:mm:ss"
-// "yyyy-mm-dd hh:mm"
-// "yyyy-mm-dd hh"
-// "yyyy-mm-dd"
-// "yyyy-mm"
-// "mm-dd"
-// "dd-mm-yy hh:mm:ss"
-// "yyyy/mm/dd hh:mm:ss"
-// "yyyy/mm/dd hh:mm"
-// "yyyy/mm/dd hh"
-// "yyyy/mm/dd"
-// "yyyy/mm"
-// "mm/dd"
-// "dd/mm/yy hh:mm:ss"
-// "yyyymmdd"
-// "mmddyy"
-// "yyyy"
-// "yy"
-// "mm"
-// "hh:mm:ss"
-// "hh:mm"
-// "mm:ss"
-
+// 1. `format` param in FormatTimeToStr function should be as flow:
+//"yyyy-mm-dd hh:mm:ss"
+//"yyyy-mm-dd hh:mm"
+//"yyyy-mm-dd hh"
+//"yyyy-mm-dd"
+//"yyyy-mm"
+//"mm-dd"
+//"dd-mm-yy hh:mm:ss"
+//"yyyy/mm/dd hh:mm:ss"
+//"yyyy/mm/dd hh:mm"
+//"yyyy/mm/dd hh"
+//"yyyy/mm/dd"
+//"yyyy/mm"
+//"mm/dd"
+//"dd/mm/yy hh:mm:ss"
+//"yyyy"
+//"mm"
+//"hh:mm:ss"
+//"mm:ss"
 package datetime
 
 import (
 	"fmt"
-	"runtime"
-	"strings"
 	"time"
 )
 
@@ -42,7 +35,7 @@ func init() {
 	timeFormat = map[string]string{
 		"yyyy-mm-dd hh:mm:ss": "2006-01-02 15:04:05",
 		"yyyy-mm-dd hh:mm":    "2006-01-02 15:04",
-		"yyyy-mm-dd hh":       "2006-01-02 15",
+		"yyyy-mm-dd hh":       "2006-01-02 15:04",
 		"yyyy-mm-dd":          "2006-01-02",
 		"yyyy-mm":             "2006-01",
 		"mm-dd":               "01-02",
@@ -54,13 +47,9 @@ func init() {
 		"yyyy/mm":             "2006/01",
 		"mm/dd":               "01/02",
 		"dd/mm/yy hh:mm:ss":   "02/01/06 15:04:05",
-		"yyyymmdd":            "20060102",
-		"mmddyy":              "010206",
 		"yyyy":                "2006",
-		"yy":                  "06",
 		"mm":                  "01",
 		"hh:mm:ss":            "15:04:05",
-		"hh:mm":               "15:04",
 		"mm:ss":               "04:05",
 	}
 }
@@ -80,11 +69,6 @@ func AddDay(t time.Time, day int64) time.Time {
 	return t.Add(24 * time.Hour * time.Duration(day))
 }
 
-// AddYear add or sub year to the time.
-func AddYear(t time.Time, year int64) time.Time {
-	return t.Add(365 * 24 * time.Hour * time.Duration(year))
-}
-
 // GetNowDate return format yyyy-mm-dd of current date
 func GetNowDate() string {
 	return time.Now().Format("2006-01-02")
@@ -113,39 +97,18 @@ func GetNightTimestamp() int64 {
 }
 
 // FormatTimeToStr convert time to string
-func FormatTimeToStr(t time.Time, format string, timezone ...string) string {
-	tf, ok := timeFormat[strings.ToLower(format)]
-	if !ok {
-		return ""
-	}
-
-	if timezone != nil && timezone[0] != "" {
-		loc, err := time.LoadLocation(timezone[0])
-		if err != nil {
-			return ""
-		}
-		return t.In(loc).Format(tf)
-	}
-	return t.Format(tf)
+func FormatTimeToStr(t time.Time, format string) string {
+	return t.Format(timeFormat[format])
 }
 
 // FormatStrToTime convert string to time
-func FormatStrToTime(str, format string, timezone ...string) (time.Time, error) {
-	tf, ok := timeFormat[strings.ToLower(format)]
+func FormatStrToTime(str, format string) (time.Time, error) {
+	v, ok := timeFormat[format]
 	if !ok {
-		return time.Time{}, fmt.Errorf("format %s not support", format)
+		return time.Time{}, fmt.Errorf("format %s not found", format)
 	}
 
-	if timezone != nil && timezone[0] != "" {
-		loc, err := time.LoadLocation(timezone[0])
-		if err != nil {
-			return time.Time{}, err
-		}
-
-		return time.ParseInLocation(tf, str, loc)
-	}
-
-	return time.Parse(tf, str)
+	return time.Parse(v, str)
 }
 
 // BeginOfMinute return beginning minute time of day
@@ -217,166 +180,3 @@ func BeginOfYear(t time.Time) time.Time {
 func EndOfYear(t time.Time) time.Time {
 	return BeginOfYear(t).AddDate(1, 0, 0).Add(-time.Nanosecond)
 }
-
-// IsLeapYear check if param year is leap year or not.
-func IsLeapYear(year int) bool {
-	return year%4 == 0 && (year%100 != 0 || year%400 == 0)
-}
-
-// BetweenSeconds returns the number of seconds between two times.
-func BetweenSeconds(t1 time.Time, t2 time.Time) int64 {
-	index := t2.Unix() - t1.Unix()
-	return index
-}
-
-// DayOfYear returns which day of the year the parameter date `t` is.
-func DayOfYear(t time.Time) int {
-	y, m, d := t.Date()
-	firstDay := time.Date(y, 1, 1, 0, 0, 0, 0, t.Location())
-	nowDate := time.Date(y, m, d, 0, 0, 0, 0, t.Location())
-
-	return int(nowDate.Sub(firstDay).Hours() / 24)
-}
-
-// IsWeekend checks if passed time is weekend or not.
-func IsWeekend(t time.Time) bool {
-	return time.Saturday == t.Weekday() || time.Sunday == t.Weekday()
-}
-
-// NowDateOrTime return current datetime with specific format and timezone.
-func NowDateOrTime(format string, timezone ...string) string {
-	tf, ok := timeFormat[strings.ToLower(format)]
-	if !ok {
-		return ""
-	}
-
-	if timezone != nil && timezone[0] != "" {
-		loc, err := time.LoadLocation(timezone[0])
-		if err != nil {
-			return ""
-		}
-
-		return time.Now().In(loc).Format(tf)
-	}
-
-	return time.Now().Format(tf)
-}
-
-// Timestamp return current second timestamp.
-func Timestamp(timezone ...string) int64 {
-	t := time.Now()
-
-	if timezone != nil && timezone[0] != "" {
-		loc, err := time.LoadLocation(timezone[0])
-		if err != nil {
-			return 0
-		}
-
-		t = t.In(loc)
-	}
-
-	return t.Unix()
-}
-
-// TimestampMilli return current mill second timestamp.
-func TimestampMilli(timezone ...string) int64 {
-	t := time.Now()
-
-	if timezone != nil && timezone[0] != "" {
-		loc, err := time.LoadLocation(timezone[0])
-		if err != nil {
-			return 0
-		}
-		t = t.In(loc)
-	}
-
-	return int64(time.Nanosecond) * t.UnixNano() / int64(time.Millisecond)
-}
-
-// TimestampMicro return current micro second timestamp.
-func TimestampMicro(timezone ...string) int64 {
-	t := time.Now()
-
-	if timezone != nil && timezone[0] != "" {
-		loc, err := time.LoadLocation(timezone[0])
-		if err != nil {
-			return 0
-		}
-		t = t.In(loc)
-	}
-
-	return int64(time.Nanosecond) * t.UnixNano() / int64(time.Microsecond)
-}
-
-// TimestampNano return current nano second timestamp.
-func TimestampNano(timezone ...string) int64 {
-	t := time.Now()
-
-	if timezone != nil && timezone[0] != "" {
-		loc, err := time.LoadLocation(timezone[0])
-		if err != nil {
-			return 0
-		}
-		t = t.In(loc)
-	}
-
-	return t.UnixNano()
-}
-
-// TrackFuncTime track the time of function execution.
-// call it at top of the func like `defer TrackFuncTime(time.Now())()`
-func TrackFuncTime(pre time.Time) func() {
-	callerName := getCallerName()
-	return func() {
-		elapsed := time.Since(pre)
-		fmt.Printf("Function %s execution time:\t %v", callerName, elapsed)
-	}
-}
-
-func getCallerName() string {
-	pc, _, _, ok := runtime.Caller(2)
-	if !ok {
-		return "Unknown"
-	}
-	fn := runtime.FuncForPC(pc)
-	if fn == nil {
-		return "Unknown"
-	}
-
-	fullName := fn.Name()
-	if lastDot := strings.LastIndex(fullName, "."); lastDot != -1 {
-		return fullName[lastDot+1:]
-	}
-
-	return fullName
-}
-
-// DaysBetween returns the number of days between two times.
-func DaysBetween(start, end time.Time) int {
-	duration := end.Sub(start)
-	days := int(duration.Hours() / 24)
-
-	return days
-}
-
-// GenerateDatetimesBetween returns a slice of strings between two times.
-// layout: the format of the datetime string
-// interval: the interval between two datetimes
-func GenerateDatetimesBetween(start, end time.Time, layout string, interval string) ([]string, error) {
-	var result []string
-
-	if start.After(end) {
-		start, end = end, start
-	}
-
-	duration, err := time.ParseDuration(interval)
-	if err != nil {
-		return nil, err
-	}
-
-	for current := start; !current.After(end); current = current.Add(duration) {
-		result = append(result, current.Format(layout))
-	}
-
-	return result, nil
-}

datetime/datetime_test.go

@@ -4,7 +4,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/duke-git/lancet/internal"
+	"github.com/duke-git/lancet/v2/internal"
 )
 
 func TestAddDay(t *testing.T) {
@@ -46,19 +46,6 @@ func TestAddMinute(t *testing.T) {
 	assert.Equal(float64(-2), diff2.Minutes())
 }
 
-func TestAddYear(t *testing.T) {
-	assert := internal.NewAssert(t, "TestAddDay")
-
-	now := time.Now()
-	after2Years := AddYear(now, 1)
-	diff1 := after2Years.Sub(now)
-	assert.Equal(float64(8760), diff1.Hours())
-
-	before2Years := AddYear(now, -1)
-	diff2 := before2Years.Sub(now)
-	assert.Equal(float64(-8760), diff2.Hours())
-}
-
 func TestGetNowDate(t *testing.T) {
 	assert := internal.NewAssert(t, "TestGetNowDate")
 	expected := time.Now().Format("2006-01-02")
@@ -244,203 +231,3 @@ func TestEndOfYear(t *testing.T) {
 
 	assert.Equal(expected, actual)
 }
-
-func TestIsLeapYear(t *testing.T) {
-	assert := internal.NewAssert(t, "TestEndOfYear")
-
-	result1 := IsLeapYear(2000)
-	result2 := IsLeapYear(2001)
-
-	assert.Equal(true, result1)
-	assert.Equal(false, result2)
-}
-
-func TestBetweenSeconds(t *testing.T) {
-	assert := internal.NewAssert(t, "TestBetweenSeconds")
-
-	today := time.Now()
-	tomorrow := AddDay(today, 1)
-	yesterday := AddDay(today, -1)
-
-	result1 := BetweenSeconds(today, tomorrow)
-	result2 := BetweenSeconds(today, yesterday)
-
-	assert.Equal(int64(86400), result1)
-	assert.Equal(int64(-86400), result2)
-}
-
-func TestDayOfYear(t *testing.T) {
-	assert := internal.NewAssert(t, "TestDayOfYear")
-	date1 := time.Date(2023, 02, 01, 1, 1, 1, 0, time.Local)
-	result1 := DayOfYear(date1)
-	assert.Equal(31, result1)
-
-	date2 := time.Date(2023, 01, 02, 1, 1, 1, 0, time.Local)
-	result2 := DayOfYear(date2)
-	assert.Equal(1, result2)
-
-	date3 := time.Date(2023, 01, 01, 1, 1, 1, 0, time.Local)
-	result3 := DayOfYear(date3)
-	assert.Equal(0, result3)
-}
-
-func TestIsWeekend(t *testing.T) {
-	assert := internal.NewAssert(t, "TestIsWeekend")
-	date := time.Date(2023, 06, 03, 0, 0, 0, 0, time.Local)
-	result := IsWeekend(date)
-	assert.Equal(true, result)
-
-	date1 := time.Date(2023, 06, 04, 0, 0, 0, 0, time.Local)
-	result1 := IsWeekend(date1)
-	assert.Equal(true, result1)
-
-	date2 := time.Date(2023, 06, 02, 0, 0, 0, 0, time.Local)
-	result2 := IsWeekend(date2)
-	assert.Equal(false, result2)
-}
-
-func TestNowDateOrTime(t *testing.T) {
-	t.Parallel()
-
-	formats := []string{
-		"yyyy-mm-dd hh:mm:ss",
-		"yyyy-mm-dd",
-		"dd-mm-yy hh:mm:ss",
-		"yyyy/mm/dd hh:mm:ss",
-		"hh:mm:ss",
-		"yyyy/mm",
-		"yyyy-mm-dd hh",
-	}
-
-	for i := 0; i < len(formats); i++ {
-		result := NowDateOrTime(formats[i], "UTC")
-		t.Log(result)
-	}
-}
-
-func TestTimestamp(t *testing.T) {
-	t.Parallel()
-
-	ts1 := Timestamp()
-	t.Log(ts1)
-
-	ts2 := TimestampMilli()
-	t.Log(ts2)
-
-	ts3 := TimestampMicro()
-	t.Log(ts3)
-
-	ts4 := TimestampNano()
-	t.Log(ts4)
-}
-
-func TestTrackFuncTime(t *testing.T) {
-	defer TrackFuncTime(time.Now())()
-
-	var n int
-	for i := 0; i < 5000000; i++ {
-		n++
-	}
-}
-
-func TestDaysBetween(t *testing.T) {
-	t.Parallel()
-
-	assert := internal.NewAssert(t, "TestDaysBetween")
-
-	tests := []struct {
-		start    time.Time
-		end      time.Time
-		expected int
-	}{
-		{
-			start:    time.Date(2024, time.September, 1, 0, 0, 0, 0, time.UTC),
-			end:      time.Date(2024, time.September, 10, 0, 0, 0, 0, time.UTC),
-			expected: 9,
-		},
-		{
-			start:    time.Date(2024, time.September, 10, 0, 0, 0, 0, time.UTC),
-			end:      time.Date(2024, time.September, 1, 0, 0, 0, 0, time.UTC),
-			expected: -9,
-		},
-		{
-			start:    time.Date(2024, time.September, 1, 0, 0, 0, 0, time.UTC),
-			end:      time.Date(2024, time.September, 1, 0, 0, 0, 0, time.UTC),
-			expected: 0,
-		},
-		{
-			start:    time.Date(2024, time.January, 1, 0, 0, 0, 0, time.UTC),
-			end:      time.Date(2024, time.December, 31, 0, 0, 0, 0, time.UTC),
-			expected: 365,
-		},
-		{
-			start:    time.Date(2024, time.March, 1, 0, 0, 0, 0, time.UTC),
-			end:      time.Date(2024, time.March, 31, 0, 0, 0, 0, time.UTC),
-			expected: 30,
-		},
-	}
-
-	for _, tt := range tests {
-		result := DaysBetween(tt.start, tt.end)
-		assert.Equal(tt.expected, result)
-	}
-}
-
-func TestGenerateDatetimesBetween(t *testing.T) {
-	t.Parallel()
-
-	assert := internal.NewAssert(t, "TestGenerateDatetimesBetween")
-
-	tests := []struct {
-		start    time.Time
-		end      time.Time
-		layout   string
-		interval string
-		expected []string
-	}{
-		{
-			start:    time.Date(2024, time.September, 1, 0, 0, 0, 0, time.UTC),
-			end:      time.Date(2024, time.September, 1, 2, 0, 0, 0, time.UTC),
-			layout:   "2006-01-02 15:04:05",
-			interval: "30m",
-			expected: []string{
-				"2024-09-01 00:00:00",
-				"2024-09-01 00:30:00",
-				"2024-09-01 01:00:00",
-				"2024-09-01 01:30:00",
-				"2024-09-01 02:00:00",
-			},
-		},
-		{
-			start:    time.Date(2024, time.September, 1, 0, 0, 0, 0, time.UTC),
-			end:      time.Date(2024, time.September, 1, 0, 0, 0, 0, time.UTC),
-			layout:   "2006-01-02 15:04:05",
-			interval: "1h",
-			expected: []string{"2024-09-01 00:00:00"},
-		},
-		{
-			start:    time.Date(2024, time.September, 1, 0, 0, 0, 0, time.UTC),
-			end:      time.Date(2024, time.September, 1, 3, 0, 0, 0, time.UTC),
-			layout:   "2006-01-02 15:04:05",
-			interval: "2h",
-			expected: []string{
-				"2024-09-01 00:00:00",
-				"2024-09-01 02:00:00",
-			},
-		},
-	}
-
-	for _, tt := range tests {
-		result, err := GenerateDatetimesBetween(tt.start, tt.end, tt.layout, tt.interval)
-
-		assert.Equal(tt.expected, result)
-		assert.IsNil(err)
-	}
-
-	t.Run("Invalid interval", func(t *testing.T) {
-		_, err := GenerateDatetimesBetween(time.Now(), time.Now(), "2006-01-02 15:04:05", "invalid")
-		if err == nil {
-			t.Fatal("Expected error, got nil")
-		}
-	})
-}

docs/algorithm.md

@@ -0,0 +1,595 @@
+# Algorithm
+Package algorithm implements some basic algorithm. eg. sort, search.
+
+<div STYLE="page-break-after: always;"></div>
+
+## Source
+
+- [https://github.com/duke-git/lancet/blob/main/algorithm/sort.go](https://github.com/duke-git/lancet/blob/main/algorithm/sort.go)
+- [https://github.com/duke-git/lancet/blob/main/algorithm/search.go](https://github.com/duke-git/lancet/blob/main/algorithm/search.go)
+- [https://github.com/duke-git/lancet/blob/main/algorithm/lru_cache.go](https://github.com/duke-git/lancet/blob/main/algorithm/lru_cache.go)
+
+<div STYLE="page-break-after: always;"></div>
+
+## Usage
+```go
+import (
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## Index
+- [BubbleSort](#BubbleSort)
+- [InsertionSort](#InsertionSort)
+- [SelectionSort](#SelectionSort)
+- [ShellSort](#ShellSort)
+- [QuickSort](#QuickSort)
+- [HeapSort](#HeapSort)
+- [MergeSort](#MergeSort)
+- [CountSort](#CountSort)
+- [BinarySearch](#BinarySearch)
+- [BinaryIterativeSearch](#BinaryIterativeSearch)
+
+- [LinearSearch](#LinearSearch)
+- [LRUCache](#LRUCache)
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## Documentation
+
+
+
+### <span id="BubbleSort">BubbleSort</span>
+<p>Sort slice with bubble sort algorithm. Param comparator should implements lancetconstraints.Comparator.</p>
+
+<b>Signature:</b>
+
+```go
+func BubbleSort[T any](slice []T, comparator lancetconstraints.Comparator)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    intSlice := []int{2, 1, 5, 3, 6, 4}
+    comparator := &intComparator{}
+    algorithm.BubbleSort(intSlice, comparator)
+
+    fmt.Println(intSlice) //[]int{1, 2, 3, 4, 5, 6}
+}
+```
+
+
+
+
+### <span id="InsertionSort">InsertionSort</span>
+<p>Sort slice with insertion sort algorithm. Param comparator should implements lancetconstraints.Comparator.</p>
+
+<b>Signature:</b>
+
+```go
+func InsertionSort[T any](slice []T, comparator lancetconstraints.Comparator)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type people struct {
+        Name string
+        Age  int
+    }
+
+    // PeopleAageComparator sort people slice by age field
+    type peopleAgeComparator struct{}
+
+    // Compare implements github.com/duke-git/lancet/lancetconstraints/constraints.go/Comparator
+    func (pc *peopleAgeComparator) Compare(v1 any, v2 any) int {
+        p1, _ := v1.(people)
+        p2, _ := v2.(people)
+
+        //ascending order
+        if p1.Age < p2.Age {
+            return -1
+        } else if p1.Age > p2.Age {
+            return 1
+        }
+        return 0
+
+        //decending order
+        // if p1.Age > p2.Age {
+        // 	return -1
+        // } else if p1.Age < p2.Age {
+        // 	return 1
+        // }
+    }
+
+    var peoples = []people{
+        {Name: "a", Age: 20},
+        {Name: "b", Age: 10},
+        {Name: "c", Age: 17},
+        {Name: "d", Age: 8},
+        {Name: "e", Age: 28},
+    }
+    comparator := &peopleAgeComparator{}
+    algorithm.InsertionSort(peoples, comparator)
+
+    fmt.Println(peoples) //[{d 8} {b 10} {c 17} {a 20} {e 28}]
+}
+```
+
+
+
+
+### <span id="SelectionSort">SelectionSort</span>
+<p>Sort slice with selection sort algorithm. Param comparator should implements lancetconstraints.Comparator.</p>
+
+<b>Signature:</b>
+
+```go
+func SelectionSort[T any](slice []T, comparator lancetconstraints.Comparator)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    intSlice := []int{2, 1, 5, 3, 6, 4}
+    comparator := &intComparator{}
+    algorithm.SelectionSort(intSlice, comparator)
+
+    fmt.Println(intSlice) //[]int{1, 2, 3, 4, 5, 6}
+}
+```
+
+
+
+
+### <span id="ShellSort">ShellSort</span>
+<p>Sort slice with shell sort algorithm. Param comparator should implements lancetconstraints.Comparator.</p>
+
+<b>Signature:</b>
+
+```go
+func ShellSort[T any](slice []T, comparator lancetconstraints.Comparator)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    intSlice := []int{2, 1, 5, 3, 6, 4}
+    comparator := &intComparator{}
+    algorithm.ShellSort(intSlice, comparator)
+
+    fmt.Println(intSlice) //[]int{1, 2, 3, 4, 5, 6}
+}
+```
+
+
+
+
+### <span id="QuickSort">QuickSort</span>
+<p>Sort slice with quick sort algorithm. Param comparator should implements lancetconstraints.Comparator.</p>
+
+<b>Signature:</b>
+
+```go
+func QuickSort[T any](slice []T comparator lancetconstraints.Comparator)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    intSlice := []int{2, 1, 5, 3, 6, 4}
+    comparator := &intComparator{}
+    algorithm.QuickSort(intSlice, comparator)
+
+    fmt.Println(intSlice) //[]int{1, 2, 3, 4, 5, 6}
+}
+```
+
+
+
+
+### <span id="HeapSort">HeapSort</span>
+<p>Sort slice with heap sort algorithm. Param comparator should implements lancetconstraints.Comparator.</p>
+
+<b>Signature:</b>
+
+```go
+func HeapSort[T any](slice []T, comparator lancetconstraints.Comparator)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    intSlice := []int{2, 1, 5, 3, 6, 4}
+    comparator := &intComparator{}
+    algorithm.HeapSort(intSlice, comparator)
+
+    fmt.Println(intSlice) //[]int{1, 2, 3, 4, 5, 6}
+}
+```
+
+
+
+
+### <span id="MergeSort">MergeSort</span>
+<p>Sort slice with merge sort algorithm. Param comparator should implements lancetconstraints.Comparator.</p>
+
+<b>Signature:</b>
+
+```go
+func MergeSort[T any](slice []T, comparator lancetconstraints.Comparator)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    intSlice := []int{2, 1, 5, 3, 6, 4}
+    comparator := &intComparator{}
+    algorithm.MergeSort(intSlice, comparator)
+
+    fmt.Println(intSlice) //[]int{1, 2, 3, 4, 5, 6}
+}
+```
+
+
+
+### <span id="CountSort">CountSort</span>
+<p>Sort slice with count sort algorithm. Param comparator should implements lancetconstraints.Comparator.</p>
+
+<b>Signature:</b>
+
+```go
+func CountSort[T any](slice []T, comparator lancetconstraints.Comparator) []T
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    intSlice := []int{2, 1, 5, 3, 6, 4}
+    comparator := &intComparator{}
+    sortedSlice := algorithm.CountSort(intSlice, comparator)
+
+    fmt.Println(sortedSlice) //[]int{1, 2, 3, 4, 5, 6}
+}
+```
+
+
+
+
+### <span id="BinarySearch">BinarySearch</span>
+<p>BinarySearch search for target within a sorted slice, recursive call itself. If a target is found, the index of the target is returned. Else the function return -1.</p>
+
+<b>Signature:</b>
+
+```go
+func BinarySearch[T any](sortedSlice []T, target T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) int
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    var sortedNumbers = []int{1, 2, 3, 4, 5, 6, 7, 8}
+    comparator := &intComparator{}
+    foundIndex := algorithm.BinarySearch(sortedNumbers, 5, 0, len(sortedNumbers)-1, comparator)
+    fmt.Println(foundIndex) //4
+
+    notFoundIndex := algorithm.BinarySearch(sortedNumbers, 9, 0, len(sortedNumbers)-1, comparator)
+    fmt.Println(notFoundIndex) //-1
+}
+```
+
+
+
+### <span id="BinaryIterativeSearch">BinaryIterativeSearch</span>
+<p>BinaryIterativeSearch search for target within a sorted slice, recursive call itself. If a target is found, the index of the target is returned. Else the function return -1.</p>
+
+<b>Signature:</b>
+
+```go
+func BinaryIterativeSearch[T any](sortedSlice []T, target T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) int
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    var sortedNumbers = []int{1, 2, 3, 4, 5, 6, 7, 8}
+    comparator := &intComparator{}
+    foundIndex := algorithm.BinaryIterativeSearch(sortedNumbers, 5, 0, len(sortedNumbers)-1, comparator)
+    fmt.Println(foundIndex) //4
+
+    notFoundIndex := algorithm.BinaryIterativeSearch(sortedNumbers, 9, 0, len(sortedNumbers)-1, comparator)
+    fmt.Println(notFoundIndex) //-1
+}
+```
+
+
+
+
+### <span id="LinearSearch">LinearSearch</span>
+<p>LinearSearch Simple linear search algorithm that iterates over all elements of an slice. If a target is found, the index of the target is returned. Else the function return -1.</p>
+
+<b>Signature:</b>
+
+```go
+func LinearSearch[T any](slice []T, target T, comparator lancetconstraints.Comparator) int
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    intSlice := []int{2, 1, 5, 3, 6, 4}
+    comparator := &intComparator{}
+    foundIndex := algorithm.LinearSearch(intSlice, 5, comparator)
+    fmt.Println(foundIndex) //2
+
+    notFoundIndex := algorithm.LinearSearch(sortedNumbers, 0, comparator)
+    fmt.Println(notFoundIndex) //-1
+}
+```
+
+
+
+
+### <span id="LRUCache">LRUCache</span>
+<p>LRUCache implements mem cache with lru.</p>
+
+<b>Signature:</b>
+
+```go
+func NewLRUCache[K comparable, V any](capacity int) *LRUCache[K, V]
+func (l *LRUCache[K, V]) Get(key K) (V, bool)
+func (l *LRUCache[K, V]) Put(key K, value V)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    cache := algorithm.NewLRUCache[int, int](2)
+
+    cache.Put(1, 1)
+    cache.Put(2, 2)
+
+    _, ok := cache.Get(0) // ok -> false
+
+    v, ok := cache.Get(1) // v->1, ok->true
+
+}
+```

docs/algorithm_zh-CN.md

@@ -0,0 +1,596 @@
+# Algorithm
+algorithm算法包实现一些基本算法，sort，search，lrucache。
+
+<div STYLE="page-break-after: always;"></div>
+
+## 源码
+
+- [https://github.com/duke-git/lancet/blob/main/algorithm/sort.go](https://github.com/duke-git/lancet/blob/main/algorithm/sort.go)
+- [https://github.com/duke-git/lancet/blob/main/algorithm/search.go](https://github.com/duke-git/lancet/blob/main/algorithm/search.go)
+- [https://github.com/duke-git/lancet/blob/main/algorithm/lru_cache.go](https://github.com/duke-git/lancet/blob/main/algorithm/lru_cache.go)
+
+<div STYLE="page-break-after: always;"></div>
+
+## 用法
+```go
+import (
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## 目录
+
+- [BubbleSort](#BubbleSort)
+- [InsertionSort](#InsertionSort)
+- [SelectionSort](#SelectionSort)
+- [ShellSort](#ShellSort)
+- [QuickSort](#QuickSort)
+- [HeapSort](#HeapSort)
+- [MergeSort](#MergeSort)
+
+- [CountSort](#CountSort)
+- [BinarySearch](#BinarySearch)
+- [BinaryIterativeSearch](#BinaryIterativeSearch)
+- [LinearSearch](#LinearSearch)
+- [LRUCache](#LRUCache)
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## 文档
+
+
+
+### <span id="BubbleSort">BubbleSort</span>
+<p>冒泡排序，参数comparator需要实现包lancetconstraints.Comparator</p>
+
+<b>函数签名:</b>
+
+```go
+func BubbleSort[T any](slice []T, comparator lancetconstraints.Comparator)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    intSlice := []int{2, 1, 5, 3, 6, 4}
+    comparator := &intComparator{}
+    algorithm.BubbleSort(intSlice, comparator)
+
+    fmt.Println(intSlice) //[]int{1, 2, 3, 4, 5, 6}
+}
+```
+
+
+
+
+### <span id="InsertionSort">InsertionSort</span>
+<p>插入排序，参数comparator需要实现包lancetconstraints.Comparator</p>
+
+<b>函数签名:</b>
+
+```go
+func InsertionSort[T any](slice []T, comparator lancetconstraints.Comparator)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type people struct {
+        Name string
+        Age  int
+    }
+
+    // PeopleAageComparator sort people slice by age field
+    type peopleAgeComparator struct{}
+
+    // Compare implements github.com/duke-git/lancet/lancetconstraints/constraints.go/Comparator
+    func (pc *peopleAgeComparator) Compare(v1 any, v2 any) int {
+        p1, _ := v1.(people)
+        p2, _ := v2.(people)
+
+        //ascending order
+        if p1.Age < p2.Age {
+            return -1
+        } else if p1.Age > p2.Age {
+            return 1
+        }
+        return 0
+
+        //decending order
+        // if p1.Age > p2.Age {
+        // 	return -1
+        // } else if p1.Age < p2.Age {
+        // 	return 1
+        // }
+    }
+
+    var peoples = []people{
+        {Name: "a", Age: 20},
+        {Name: "b", Age: 10},
+        {Name: "c", Age: 17},
+        {Name: "d", Age: 8},
+        {Name: "e", Age: 28},
+    }
+    comparator := &peopleAgeComparator{}
+    algorithm.InsertionSort(peoples, comparator)
+
+    fmt.Println(intSlice) //[{d 8} {b 10} {c 17} {a 20} {e 28}]
+}
+```
+
+
+
+
+### <span id="SelectionSort">SelectionSort</span>
+<p>选择排序，参数comparator需要实现包lancetconstraints.Comparator</p>
+
+<b>函数签名:</b>
+
+```go
+func SelectionSort[T any](slice []T, comparator lancetconstraints.Comparator)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    intSlice := []int{2, 1, 5, 3, 6, 4}
+    comparator := &intComparator{}
+    algorithm.SelectionSort(intSlice, comparator)
+
+    fmt.Println(intSlice) //[]int{1, 2, 3, 4, 5, 6}
+}
+```
+
+
+
+
+### <span id="ShellSort">ShellSort</span>
+<p>希尔排序，参数comparator需要实现包lancetconstraints.Comparator</p>
+
+<b>函数签名:</b>
+
+```go
+func ShellSort[T any](slice []T, comparator lancetconstraints.Comparator)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    intSlice := []int{2, 1, 5, 3, 6, 4}
+    comparator := &intComparator{}
+    algorithm.ShellSort(intSlice, comparator)
+
+    fmt.Println(intSlice) //[]int{1, 2, 3, 4, 5, 6}
+}
+```
+
+
+
+
+### <span id="QuickSort">QuickSort</span>
+<p>快速排序，参数comparator需要实现包lancetconstraints.Comparator</p>
+
+<b>函数签名:</b>
+
+```go
+func QuickSort[T any](slice []T, comparator lancetconstraints.Comparator) []T
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    intSlice := []int{2, 1, 5, 3, 6, 4}
+    comparator := &intComparator{}
+    algorithm.QuickSort(intSlice, comparator)
+
+    fmt.Println(intSlice) //[]int{1, 2, 3, 4, 5, 6}
+}
+```
+
+
+
+
+### <span id="HeapSort">HeapSort</span>
+<p>堆排序，参数comparator需要实现包lancetconstraints.Comparator</p>
+
+<b>函数签名:</b>
+
+```go
+func HeapSort[T any](slice []T, comparator lancetconstraints.Comparator) []T
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    intSlice := []int{2, 1, 5, 3, 6, 4}
+    comparator := &intComparator{}
+    algorithm.HeapSort(intSlice, comparator)
+
+    fmt.Println(intSlice) //[]int{1, 2, 3, 4, 5, 6}
+}
+```
+
+
+
+
+### <span id="MergeSort">MergeSort</span>
+<p>归并排序，参数comparator需要实现包lancetconstraints.Comparator</p>
+
+<b>函数签名:</b>
+
+```go
+func MergeSort[T any](slice []T, comparator lancetconstraints.Comparator)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    intSlice := []int{2, 1, 5, 3, 6, 4}
+    comparator := &intComparator{}
+    algorithm.MergeSort(intSlice, comparator)
+
+    fmt.Println(intSlice) //[]int{1, 2, 3, 4, 5, 6}
+}
+```
+
+
+
+### <span id="CountSort">CountSort</span>
+<p>计数排序，参数comparator需要实现包lancetconstraints.Comparator</p>
+
+<b>函数签名:</b>
+
+```go
+func CountSort[T any](slice []T, comparator lancetconstraints.Comparator) []T
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    intSlice := []int{2, 1, 5, 3, 6, 4}
+    comparator := &intComparator{}
+    sortedSlice := algorithm.CountSort(intSlice, comparator)
+
+    fmt.Println(sortedSlice) //[]int{1, 2, 3, 4, 5, 6}
+}
+```
+
+
+
+
+### <span id="BinarySearch">BinarySearch</span>
+<p>二分递归查找，返回元素索引，未找到元素返回-1，参数comparator需要实现包lancetconstraints.Comparator</p>
+
+<b>函数签名:</b>
+
+```go
+func BinarySearch[T any](sortedSlice []T, target T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) int
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    var sortedNumbers = []int{1, 2, 3, 4, 5, 6, 7, 8}
+    comparator := &intComparator{}
+    foundIndex := algorithm.BinarySearch(sortedNumbers, 5, 0, len(sortedNumbers)-1, comparator)
+    fmt.Println(foundIndex) //4
+
+    notFoundIndex := algorithm.BinarySearch(sortedNumbers, 9, 0, len(sortedNumbers)-1, comparator)
+    fmt.Println(notFoundIndex) //-1
+}
+```
+
+
+
+### <span id="BinaryIterativeSearch">BinaryIterativeSearch</span>
+<p>二分迭代查找，返回元素索引，未找到元素返回-1，参数comparator需要实现包lancetconstraints.Comparator</p>
+
+<b>函数签名:</b>
+
+```go
+func BinaryIterativeSearch[T any](sortedSlice []T, target T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) int
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    var sortedNumbers = []int{1, 2, 3, 4, 5, 6, 7, 8}
+    comparator := &intComparator{}
+    foundIndex := algorithm.BinaryIterativeSearch(sortedNumbers, 5, 0, len(sortedNumbers)-1, comparator)
+    fmt.Println(foundIndex) //4
+
+    notFoundIndex := algorithm.BinaryIterativeSearch(sortedNumbers, 9, 0, len(sortedNumbers)-1, comparator)
+    fmt.Println(notFoundIndex) //-1
+}
+```
+
+
+
+
+### <span id="LinearSearch">LinearSearch</span>
+<p>线性查找，返回元素索引，未找到元素返回-1，参数comparator需要实现包lancetconstraints.Comparator</p>
+
+<b>函数签名:</b>
+
+```go
+func LinearSearch[T any](slice []T, target T, comparator lancetconstraints.Comparator) int
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    type intComparator struct{}
+
+    func (c *intComparator) Compare(v1 any, v2 any) int {
+        val1, _ := v1.(int)
+        val2, _ := v2.(int)
+
+        //ascending order
+        if val1 < val2 {
+            return -1
+        } else if val1 > val2 {
+            return 1
+        }
+        return 0
+    }
+
+    intSlice := []int{2, 1, 5, 3, 6, 4}
+    comparator := &intComparator{}
+    foundIndex := algorithm.LinearSearch(intSlice, 5, comparator)
+    fmt.Println(foundIndex) //2
+
+    notFoundIndex := algorithm.LinearSearch(sortedNumbers, 0, comparator)
+    fmt.Println(notFoundIndex) //-1
+}
+```
+
+
+
+
+### <span id="LRUCache">LRUCache</span>
+<p>lru实现缓存</p>
+
+<b>函数签名:</b>
+
+```go
+func NewLRUCache[K comparable, V any](capacity int) *LRUCache[K, V]
+func (l *LRUCache[K, V]) Get(key K) (V, bool)
+func (l *LRUCache[K, V]) Put(key K, value V)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/algorithm"
+)
+
+func main() {
+    cache := algorithm.NewLRUCache[int, int](2)
+
+    cache.Put(1, 1)
+    cache.Put(2, 2)
+
+    _, ok := cache.Get(0) // ok -> false
+
+    v, ok := cache.Get(1) // v->1, ok->true
+
+}
+```

docs/compare.md

@@ -1,326 +0,0 @@
-# Compare
-
-Package compare provides a lightweight comparison function on any type.
-
-<div STYLE="page-break-after: always;"></div>
-
-## Source:
-
--   [https://github.com/duke-git/lancet/blob/v1/compare/compare.go](https://github.com/duke-git/lancet/blob/v1/compare/compare.go)
-
--   [https://github.com/duke-git/lancet/blob/v1/compare/compare_internal.go](https://github.com/duke-git/lancet/blob/v1/compare/compare_internal.go)
-
-<div STYLE="page-break-after: always;"></div>
-
-## Usage:
-
-```go
-import (
-    "github.com/duke-git/lancet/condition"
-)
-```
-
-<div STYLE="page-break-after: always;"></div>
-
-## Index
-
--   [Equal](#Equal)
--   [EqualValue](#EqualValue)
--   [LessThan](#LessThan)
--   [GreaterThan](#GreaterThan)
--   [LessOrEqual](#LessOrEqual)
--   [GreaterOrEqual](#GreaterOrEqual)
-
-<div STYLE="page-break-after: always;"></div>
-
-## Documentation
-
-### <span id="Equal">Equal</span>
-
-<p>Checks if two values are equal or not. (check both type and value)</p>
-
-<b>Signature:</b>
-
-```go
-func Equal(left, right interface{}) bool
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/compare"
-)
-
-func main() {
-    result1 := compare.Equal(1, 1)
-    result2 := compare.Equal("1", "1")
-    result3 := compare.Equal([]int{1, 2, 3}, []int{1, 2, 3})
-    result4 := compare.Equal(map[int]string{1: "a", 2: "b"}, map[int]string{1: "a", 2: "b"})
-
-    result5 := compare.Equal(1, "1")
-    result6 := compare.Equal(1, int64(1))
-    result7 := compare.Equal([]int{1, 2}, []int{1, 2, 3})
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-    fmt.Println(result5)
-    fmt.Println(result6)
-    fmt.Println(result7)
-
-    // Output:
-    // true
-    // true
-    // true
-    // true
-    // false
-    // false
-    // false
-}
-```
-
-### <span id="EqualValue">EqualValue</span>
-
-<p>Checks if two values are equal or not. (check value only)</p>
-
-<b>Signature:</b>
-
-```go
-func EqualValue(left, right interface{}) bool
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/compare"
-)
-
-func main() {
-    result1 := compare.EqualValue(1, 1)
-    result2 := compare.EqualValue(int(1), int64(1))
-    result3 := compare.EqualValue(1, "1")
-    result4 := compare.EqualValue(1, "2")
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-
-    // Output:
-    // true
-    // true
-    // true
-    // false
-}
-```
-
-### <span id="LessThan">LessThan</span>
-
-<p>Checks if value `left` less than value `right`.</p>
-
-<b>Signature:</b>
-
-```go
-func LessThan(left, right interface{}) bool
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/compare"
-)
-
-func main() {
-    result1 := compare.LessThan(1, 2)
-    result2 := compare.LessThan(1.1, 2.2)
-    result3 := compare.LessThan("a", "b")
-
-    time1 := time.Now()
-    time2 := time1.Add(time.Second)
-    result4 := compare.LessThan(time1, time2)
-
-    result5 := compare.LessThan(2, 1)
-    result6 := compare.LessThan(1, int64(2))
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-    fmt.Println(result5)
-    fmt.Println(result6)
-
-    // Output:
-    // true
-    // true
-    // true
-    // true
-    // false
-    // false
-}
-```
-
-### <span id="GreaterThan">GreaterThan</span>
-
-<p>Checks if value `left` greater than value `right`.</p>
-
-<b>Signature:</b>
-
-```go
-func GreaterThan(left, right interface{}) bool
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/compare"
-)
-
-func main() {
-    result1 := compare.GreaterThan(2, 1)
-    result2 := compare.GreaterThan(2.2, 1.1)
-    result3 := compare.GreaterThan("b", "a")
-
-    time1 := time.Now()
-    time2 := time1.Add(time.Second)
-    result4 := compare.GreaterThan(time2, time1)
-
-    result5 := compare.GreaterThan(1, 2)
-    result6 := compare.GreaterThan(int64(2), 1)
-    result7 := compare.GreaterThan("b", "c")
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-    fmt.Println(result5)
-    fmt.Println(result6)
-    fmt.Println(result7)
-
-    // Output:
-    // true
-    // true
-    // true
-    // true
-    // false
-    // false
-    // false
-}
-```
-
-### <span id="LessOrEqual">LessOrEqual</span>
-
-<p>Checks if value `left` less than or equal than value `right`.</p>
-
-<b>Signature:</b>
-
-```go
-func LessOrEqual(left, right interface{}) bool
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/compare"
-)
-
-func main() {
-    result1 := compare.LessOrEqual(1, 1)
-    result2 := compare.LessOrEqual(1.1, 2.2)
-    result3 := compare.LessOrEqual("a", "b")
-
-    time1 := time.Now()
-    time2 := time1.Add(time.Second)
-    result4 := compare.LessOrEqual(time1, time2)
-
-    result5 := compare.LessOrEqual(2, 1)
-    result6 := compare.LessOrEqual(1, int64(2))
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-    fmt.Println(result5)
-    fmt.Println(result6)
-
-    // Output:
-    // true
-    // true
-    // true
-    // true
-    // false
-    // false
-}
-```
-
-### <span id="GreaterOrEqual">GreaterOrEqual</span>
-
-<p>Checks if value `left` less greater or equal than value `right`.</p>
-
-<b>Signature:</b>
-
-```go
-func GreaterOrEqual(left, right interface{}) bool
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/compare"
-)
-
-func main() {
-    result1 := compare.GreaterOrEqual(1, 1)
-    result2 := compare.GreaterOrEqual(2.2, 1.1)
-    result3 := compare.GreaterOrEqual("b", "b")
-
-    time1 := time.Now()
-    time2 := time1.Add(time.Second)
-    result4 := compare.GreaterOrEqual(time2, time1)
-
-    result5 := compare.GreaterOrEqual(1, 2)
-    result6 := compare.GreaterOrEqual(int64(2), 1)
-    result7 := compare.GreaterOrEqual("b", "c")
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-    fmt.Println(result5)
-    fmt.Println(result6)
-    fmt.Println(result7)
-
-    // Output:
-    // true
-    // true
-    // true
-    // true
-    // false
-    // false
-    // false
-}
-```

docs/compare_zh-CN.md

@@ -1,326 +0,0 @@
-# Compare
-
-compare包提供几个轻量级的类型比较函数。
-
-<div STYLE="page-break-after: always;"></div>
-
-## 源码:
-
--   [https://github.com/duke-git/lancet/blob/v1/compare/compare.go](https://github.com/duke-git/lancet/blob/v1/compare/compare.go)
-
--   [https://github.com/duke-git/lancet/blob/v1/compare/compare_internal.go](https://github.com/duke-git/lancet/blob/v1/compare/compare_internal.go)
-
-<div STYLE="page-break-after: always;"></div>
-
-## 用法:
-
-```go
-import (
-    "github.com/duke-git/lancet/condition"
-)
-```
-
-<div STYLE="page-break-after: always;"></div>
-
-## 目录
-
--   [Equal](#Equal)
--   [EqualValue](#EqualValue)
--   [LessThan](#LessThan)
--   [GreaterThan](#GreaterThan)
--   [LessOrEqual](#LessOrEqual)
--   [GreaterOrEqual](#GreaterOrEqual)
-
-<div STYLE="page-break-after: always;"></div>
-
-## Documentation
-
-### <span id="Equal">Equal</span>
-
-<p>检查两个值是否相等(检查类型和值)</p>
-
-<b>函数签名:</b>
-
-```go
-func Equal(left, right interface{}) bool
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/compare"
-)
-
-func main() {
-    result1 := compare.Equal(1, 1)
-    result2 := compare.Equal("1", "1")
-    result3 := compare.Equal([]int{1, 2, 3}, []int{1, 2, 3})
-    result4 := compare.Equal(map[int]string{1: "a", 2: "b"}, map[int]string{1: "a", 2: "b"})
-
-    result5 := compare.Equal(1, "1")
-    result6 := compare.Equal(1, int64(1))
-    result7 := compare.Equal([]int{1, 2}, []int{1, 2, 3})
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-    fmt.Println(result5)
-    fmt.Println(result6)
-    fmt.Println(result7)
-
-    // Output:
-    // true
-    // true
-    // true
-    // true
-    // false
-    // false
-    // false
-}
-```
-
-### <span id="EqualValue">EqualValue</span>
-
-<p>检查两个值是否相等(只检查值)</p>
-
-<b>函数签名:</b>
-
-```go
-func EqualValue(left, right interface{}) bool
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/compare"
-)
-
-func main() {
-    result1 := compare.EqualValue(1, 1)
-    result2 := compare.EqualValue(int(1), int64(1))
-    result3 := compare.EqualValue(1, "1")
-    result4 := compare.EqualValue(1, "2")
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-
-    // Output:
-    // true
-    // true
-    // true
-    // false
-}
-```
-
-### <span id="LessThan">LessThan</span>
-
-<p>验证参数`left`的值是否小于参数`right`的值。</p>
-
-<b>函数签名:</b>
-
-```go
-func LessThan(left, right interface{}) bool
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/compare"
-)
-
-func main() {
-    result1 := compare.LessThan(1, 2)
-    result2 := compare.LessThan(1.1, 2.2)
-    result3 := compare.LessThan("a", "b")
-
-    time1 := time.Now()
-    time2 := time1.Add(time.Second)
-    result4 := compare.LessThan(time1, time2)
-
-    result5 := compare.LessThan(2, 1)
-    result6 := compare.LessThan(1, int64(2))
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-    fmt.Println(result5)
-    fmt.Println(result6)
-
-    // Output:
-    // true
-    // true
-    // true
-    // true
-    // false
-    // false
-}
-```
-
-### <span id="GreaterThan">GreaterThan</span>
-
-<p>验证参数`left`的值是否大于参数`right`的值。</p>
-
-<b>函数签名:</b>
-
-```go
-func GreaterThan(left, right interface{}) bool
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/compare"
-)
-
-func main() {
-    result1 := compare.GreaterThan(2, 1)
-    result2 := compare.GreaterThan(2.2, 1.1)
-    result3 := compare.GreaterThan("b", "a")
-
-    time1 := time.Now()
-    time2 := time1.Add(time.Second)
-    result4 := compare.GreaterThan(time2, time1)
-
-    result5 := compare.GreaterThan(1, 2)
-    result6 := compare.GreaterThan(int64(2), 1)
-    result7 := compare.GreaterThan("b", "c")
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-    fmt.Println(result5)
-    fmt.Println(result6)
-    fmt.Println(result7)
-
-    // Output:
-    // true
-    // true
-    // true
-    // true
-    // false
-    // false
-    // false
-}
-```
-
-### <span id="LessOrEqual">LessOrEqual</span>
-
-<p>验证参数`left`的值是否小于或等于参数`right`的值。</p>
-
-<b>函数签名:</b>
-
-```go
-func LessOrEqual(left, right interface{}) bool
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/compare"
-)
-
-func main() {
-    result1 := compare.LessOrEqual(1, 1)
-    result2 := compare.LessOrEqual(1.1, 2.2)
-    result3 := compare.LessOrEqual("a", "b")
-
-    time1 := time.Now()
-    time2 := time1.Add(time.Second)
-    result4 := compare.LessOrEqual(time1, time2)
-
-    result5 := compare.LessOrEqual(2, 1)
-    result6 := compare.LessOrEqual(1, int64(2))
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-    fmt.Println(result5)
-    fmt.Println(result6)
-
-    // Output:
-    // true
-    // true
-    // true
-    // true
-    // false
-    // false
-}
-```
-
-### <span id="GreaterOrEqual">GreaterOrEqual</span>
-
-<p>验证参数`left`的值是否大于或参数`right`的值。</p>
-
-<b>函数签名:</b>
-
-```go
-func GreaterOrEqual(left, right interface{}) bool
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/compare"
-)
-
-func main() {
-    result1 := compare.GreaterOrEqual(1, 1)
-    result2 := compare.GreaterOrEqual(2.2, 1.1)
-    result3 := compare.GreaterOrEqual("b", "b")
-
-    time1 := time.Now()
-    time2 := time1.Add(time.Second)
-    result4 := compare.GreaterOrEqual(time2, time1)
-
-    result5 := compare.GreaterOrEqual(1, 2)
-    result6 := compare.GreaterOrEqual(int64(2), 1)
-    result7 := compare.GreaterOrEqual("b", "c")
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-    fmt.Println(result5)
-    fmt.Println(result6)
-    fmt.Println(result7)
-
-    // Output:
-    // true
-    // true
-    // true
-    // true
-    // false
-    // false
-    // false
-}
-```

docs/concurrency.md

@@ -0,0 +1,390 @@
+# Concurrency
+Package concurrency contain some functions to support concurrent programming. eg, goroutine, channel, async.
+
+<div STYLE="page-break-after: always;"></div>
+
+## Source:
+
+- [https://github.com/duke-git/lancet/blob/main/concurrency/channel.go](https://github.com/duke-git/lancet/blob/main/concurrency/channel.go)
+
+<div STYLE="page-break-after: always;"></div>
+
+## Usage:
+```go
+import (
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## Index
+### Channel
+- [NewChannel](#NewChannel)
+- [Bridge](#Bridge)
+- [FanIn](#FanIn)
+- [Generate](#Generate)
+- [Or](#Or)
+- [OrDone](#OrDone)
+- [Repeat](#Repeat)
+- [RepeatFn](#RepeatFn)
+- [Take](#Take)
+- [Tee](#Tee)
+
+<div STYLE="page-break-after: always;"></div>
+
+## Documentation
+
+
+## Channel
+### <span id="NewChannel">NewChannel</span>
+<p>return a Channel pointer instance.</p>
+
+<b>Signature:</b>
+
+```go
+type Channel struct {}
+func NewChannel() *Channel
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    c := concurrency.NewChannel()
+}
+```
+
+
+
+### <span id="Bridge">Bridge</span>
+
+<p>Link multiple channels into one channel until cancel the context.</p>
+
+<b>Signature:</b>
+
+```go
+func (c *Channel) Bridge(ctx context.Context, chanStream <-chan <-chan any) <-chan any
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "context"
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	c := concurrency.NewChannel()
+	genVals := func() <-chan <-chan any {
+		chanStream := make(chan (<-chan any))
+		go func() {
+			defer close(chanStream)
+			for i := 0; i < 10; i++ {
+				stream := make(chan any, 1)
+				stream <- i
+				close(stream)
+				chanStream <- stream
+			}
+		}()
+		return chanStream
+	}
+
+	index := 0
+	for val := range c.Bridge(ctx, genVals()) {
+		fmt.Printf("%v ", val) //0 1 2 3 4 5 6 7 8 9
+	}
+}
+```
+
+
+
+
+### <span id="FanIn">FanIn</span>
+
+<p>merge multiple channels into one channel until cancel the context.</p>
+
+<b>Signature:</b>
+
+```go
+func (c *Channel) FanIn(ctx context.Context, channels ...<-chan any) <-chan any
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "context"
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	c := concurrency.NewChannel()
+	channels := make([]<-chan any, 3)
+
+	for i := 0; i < 3; i++ {
+		channels[i] = c.Take(ctx, c.Repeat(ctx, i), 3)
+	}
+
+	mergedChannel := c.FanIn(ctx, channels...)
+
+	for val := range mergedChannel {
+		fmt.Println("\t%d\n", val) //1,2,1,0,0,1,0,2,2 (order not for sure)
+	}
+}
+```
+
+
+### <span id="Repeat">Repeat</span>
+
+<p>Return a chan, put param `values` into the chan repeatly until cancel the context.</p>
+
+<b>Signature:</b>
+
+```go
+func (c *Channel) Repeat(ctx context.Context, values ...any) <-chan any
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "context"
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	c := concurrency.NewChannel()
+	intStream := c.Take(ctx, c.Repeat(ctx, 1, 2), 5)
+
+	for v := range intStream {
+	fmt.Println(v) //1, 2, 1, 2, 1
+	}
+}
+```
+
+
+
+
+### <span id="RepeatFn">RepeatFn</span>
+
+<p>Return a chan, excutes fn repeatly, and put the result into retruned chan until cancel context.</p>
+
+<b>Signature:</b>
+
+```go
+func (c *Channel) RepeatFn(ctx context.Context, fn func() any) <-chan any
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "context"
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	fn := func() any {
+		s := "a"
+		return s
+	}
+	c := concurrency.NewChannel()
+	dataStream := c.Take(ctx, c.RepeatFn(ctx, fn), 3)
+
+	for v := range dataStream {
+		fmt.Println(v) //a, a, a
+	}
+}
+```
+
+
+
+### <span id="Or">Or</span>
+
+<p>Read one or more channels into one channel, will close when any readin channel is closed.</p>
+
+<b>Signature:</b>
+
+```go
+func (c *Channel) Or(channels ...<-chan any) <-chan any
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "context"
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+	sig := func(after time.Duration) <-chan any {
+		c := make(chan interface{})
+		go func() {
+			defer close(c)
+			time.Sleep(after)
+		}()
+		return c
+	}
+
+	start := time.Now()
+
+	c := concurrency.NewChannel()
+	<-c.Or(
+		sig(1*time.Second),
+		sig(2*time.Second),
+		sig(3*time.Second),
+		sig(4*time.Second),
+		sig(5*time.Second),
+	)
+
+	fmt.Println("done after %v", time.Since(start)) //1.003s
+}
+```
+
+
+
+
+### <span id="OrDone">OrDone</span>
+
+<p>Read a channel into another channel, will close until cancel context.</p>
+
+<b>Signature:</b>
+
+```go
+func (c *Channel) OrDone(ctx context.Context, channel <-chan any) <-chan any
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "context"
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	c := concurrency.NewChannel()
+	intStream := c.Take(ctx, c.Repeat(ctx, 1), 3)
+
+	for val := range c.OrDone(ctx, intStream) {
+		fmt.Println(val)  //1
+	}
+}
+```
+
+
+
+
+### <span id="Take">Take</span>
+
+<p>Return a chan whose values are tahken from another chan until cancel context.</p>
+
+<b>Signature:</b>
+
+```go
+func (c *Channel) Take(ctx context.Context, valueStream <-chan any, number int) <-chan any
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "context"
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	numbers := make(chan any, 5)
+	numbers <- 1
+	numbers <- 2
+	numbers <- 3
+	numbers <- 4
+	numbers <- 5
+	defer close(numbers)
+
+	c := concurrency.NewChannel()
+	intStream := c.Take(ctx, numbers, 3)
+
+	for val := range intStream {
+		fmt.Println(val) //1, 2, 3
+	}
+}
+```
+
+
+
+### <span id="Tee">Tee</span>
+
+<p>Split one chanel into two channels until cancel context.</p>
+
+<b>Signature:</b>
+
+```go
+func (c *Channel) Tee(ctx context.Context, in <-chan any) (<-chan any, <-chan any)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "context"
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	c := concurrency.NewChannel()
+	inStream := c.Take(ctx, c.Repeat(ctx, 1, 2), 4)
+
+	out1, out2 := c.Tee(ctx, inStream)
+	for val := range out1 {
+		fmt.Println(val) //1
+		fmt.Println(<-out2) //1
+	}
+}
+```

docs/concurrency_zh-CN.md

@@ -0,0 +1,390 @@
+# Concurrency
+并发包包含一些支持并发编程的功能。例如：goroutine, channel, async等。
+
+<div STYLE="page-break-after: always;"></div>
+
+## 源码:
+
+- [https://github.com/duke-git/lancet/blob/main/concurrency/channel.go](https://github.com/duke-git/lancet/blob/main/concurrency/channel.go)
+
+<div STYLE="page-break-after: always;"></div>
+
+## 用法:
+```go
+import (
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## 目录
+### Channel
+- [NewChannel](#NewChannel)
+- [Bridge](#Bridge)
+- [FanIn](#FanIn)
+- [Generate](#Generate)
+- [Or](#Or)
+- [OrDone](#OrDone)
+- [Repeat](#Repeat)
+- [RepeatFn](#RepeatFn)
+- [Take](#Take)
+- [Tee](#Tee)
+
+<div STYLE="page-break-after: always;"></div>
+
+## 文档
+
+
+### Channel
+### <span id="NewChannel">NewChannel</span>
+<p>返回一个 Channel 指针实例</p>
+
+<b>函数签名:</b>
+
+```go
+type Channel struct {}
+func NewChannel() *Channel
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    c := concurrency.NewChannel()
+}
+```
+
+
+
+### <span id="Bridge">Bridge</span>
+
+<p>将多个通道链接到一个通道，直到取消上下文。</p>
+
+<b>函数签名:</b>
+
+```go
+func (c *Channel) Bridge(ctx context.Context, chanStream <-chan <-chan any) <-chan any
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "context"
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	c := concurrency.NewChannel()
+	genVals := func() <-chan <-chan any {
+		chanStream := make(chan (<-chan any))
+		go func() {
+			defer close(chanStream)
+			for i := 0; i < 10; i++ {
+				stream := make(chan any, 1)
+				stream <- i
+				close(stream)
+				chanStream <- stream
+			}
+		}()
+		return chanStream
+	}
+
+	index := 0
+	for val := range c.Bridge(ctx, genVals()) {
+		fmt.Printf("%v ", val) //0 1 2 3 4 5 6 7 8 9
+	}
+}
+```
+
+
+
+
+### <span id="FanIn">FanIn</span>
+
+<p>将多个通道合并为一个通道，直到取消上下文</p>
+
+<b>函数签名:</b>
+
+```go
+func (c *Channel) FanIn(ctx context.Context, channels ...<-chan any) <-chan any
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "context"
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	c := concurrency.NewChannel()
+	channels := make([]<-chan any, 3)
+
+	for i := 0; i < 3; i++ {
+		channels[i] = c.Take(ctx, c.Repeat(ctx, i), 3)
+	}
+
+	mergedChannel := c.FanIn(ctx, channels...)
+
+	for val := range mergedChannel {
+		fmt.Println("\t%d\n", val) //1,2,1,0,0,1,0,2,2 (order not for sure)
+	}
+}
+```
+
+
+### <span id="Repeat">Repeat</span>
+
+<p>返回一个chan，将参数`values`重复放入chan，直到取消上下文。</p>
+
+<b>函数签名:</b>
+
+```go
+func (c *Channel) Repeat(ctx context.Context, values ...any) <-chan any
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "context"
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	c := concurrency.NewChannel()
+	intStream := c.Take(ctx, c.Repeat(ctx, 1, 2), 5)
+
+	for v := range intStream {
+		fmt.Println(v) //1, 2, 1, 2, 1
+	}
+}
+```
+
+
+
+
+### <span id="RepeatFn">RepeatFn</span>
+
+<p>返回一个chan，重复执行函数fn，并将结果放入返回的chan，直到取消上下文。</p>
+
+<b>函数签名:</b>
+
+```go
+func (c *Channel) RepeatFn(ctx context.Context, fn func() any) <-chan any
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "context"
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	fn := func() any {
+		s := "a"
+		return s
+	}
+	c := concurrency.NewChannel()
+	dataStream := c.Take(ctx, c.RepeatFn(ctx, fn), 3)
+
+	for v := range dataStream {
+		fmt.Println(v) //a, a, a
+	}
+}
+```
+
+
+
+### <span id="Or">Or</span>
+
+<p>将一个或多个通道读取到一个通道中，当任何读取通道关闭时将结束读取。</p>
+
+<b>函数签名:</b>
+
+```go
+func (c *Channel) Or(channels ...<-chan any) <-chan any
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "context"
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+	sig := func(after time.Duration) <-chan any {
+		c := make(chan interface{})
+		go func() {
+			defer close(c)
+			time.Sleep(after)
+		}()
+		return c
+	}
+
+	start := time.Now()
+
+	c := concurrency.NewChannel()
+	<-c.Or(
+		sig(1*time.Second),
+		sig(2*time.Second),
+		sig(3*time.Second),
+		sig(4*time.Second),
+		sig(5*time.Second),
+	)
+
+	fmt.Println("done after %v", time.Since(start)) //1.003s
+}
+```
+
+
+
+
+### <span id="OrDone">OrDone</span>
+
+<p>将一个通道读入另一个通道，直到取消上下文。</p>
+
+<b>函数签名:</b>
+
+```go
+func (c *Channel) OrDone(ctx context.Context, channel <-chan any) <-chan any
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "context"
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	c := concurrency.NewChannel()
+	intStream := c.Take(ctx, c.Repeat(ctx, 1), 3)
+
+	for val := range c.OrDone(ctx, intStream) {
+		fmt.Println(val)  //1
+	}
+}
+```
+
+
+
+
+### <span id="Take">Take</span>
+
+<p>返回一个chan，其值从另一个chan获取，直到取消上下文。</p>
+
+<b>函数签名:</b>
+
+```go
+func (c *Channel) Take(ctx context.Context, valueStream <-chan any, number int) <-chan any
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "context"
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	numbers := make(chan any, 5)
+	numbers <- 1
+	numbers <- 2
+	numbers <- 3
+	numbers <- 4
+	numbers <- 5
+	defer close(numbers)
+
+	c := concurrency.NewChannel()
+	intStream := c.Take(ctx, numbers, 3)
+
+	for val := range intStream {
+		fmt.Println(val) //1, 2, 3
+	}
+}
+```
+
+
+
+### <span id="Tee">Tee</span>
+
+<p>将一个通道分成两个通道，直到取消上下文。</p>
+
+<b>函数签名:</b>
+
+```go
+func (c *Channel) Tee(ctx context.Context, in <-chan any) (<-chan any, <-chan any)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "context"
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	c := concurrency.NewChannel()
+	inStream := c.Take(ctx, c.Repeat(ctx, 1, 2), 4)
+
+	out1, out2 := c.Tee(ctx, inStream)
+	for val := range out1 {
+		fmt.Println(val) //1
+		fmt.Println(<-out2) //1
+	}
+}
+```

docs/datastructure/hashmap.md

@@ -0,0 +1,208 @@
+# HashMap
+
+HashMap is a key value map data structure.
+
+<div STYLE="page-break-after: always;"></div>
+
+## Source
+
+- [https://github.com/duke-git/lancet/blob/main/datastructure/hashmap/hashmap.go](https://github.com/duke-git/lancet/blob/main/datastructure/hashmap/hashmap.go)
+
+<div STYLE="page-break-after: always;"></div>
+
+## Usage
+
+```go
+import (
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## Index
+
+- [NewHashMap](#NewHashMap)
+- [NewHashMapWithCapacity](#NewHashMapWithCapacity)
+- [Get](#Get)
+- [Put](#Put)
+- [Delete](#Delete)
+- [Contains](#Contains)
+
+<div STYLE="page-break-after: always;"></div>
+
+## Documentation
+
+### <span id="NewHashMap">NewHashMap</span>
+
+<p>Make a HashMap instance with default capacity is 1 << 10.</p>
+
+<b>Signature:</b>
+
+```go
+func NewHashMap() *HashMap
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+
+func main() {
+    hm := heap.NewHashMap()
+    fmt.Println(hm)
+}
+```
+
+### <span id="NewHashMap">NewHashMap</span>
+
+<p>Make a HashMap instance with given size and capacity.</p>
+
+<b>Signature:</b>
+
+```go
+func NewHashMapWithCapacity(size, capacity uint64) *HashMap
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+
+func main() {
+    hm := heap.NewHashMapWithCapacity(uint64(100), uint64(1000))
+    fmt.Println(hm)
+}
+```
+
+### <span id="Get">Get</span>
+
+<p>Get the value of given key in hashmap</p>
+
+<b>Signature:</b>
+
+```go
+func (hm *HashMap) Get(key any) any
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+
+func main() {
+	hm := heap.NewHashMap()
+	val := hm.Get("a")
+
+    fmt.Println(val) //nil
+}
+```
+
+### <span id="Put">Put</span>
+
+<p>Put new key value in hashmap, then return value</p>
+
+<b>Signature:</b>
+
+```go
+func (hm *HashMap) Put(key any, value any) any
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+
+func main() {
+	hm := heap.NewHashMap()
+	hm.Put("a", 1)
+
+	val := hm.Get("a")
+    fmt.Println(val) //1
+}
+```
+
+
+
+### <span id="Delete">Delete</span>
+
+<p>Delete key-value item by given key in hashmap.</p>
+
+<b>Signature:</b>
+
+```go
+func (hm *HashMap) Delete(key any)
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+
+func main() {
+	hm := heap.NewHashMap()
+	hm.Put("a", 1)
+	val := hm.Get("a")
+    fmt.Println(val) //1
+
+	hm.Delete("a")
+	val = hm.Get("a")
+    fmt.Println(val) //nil
+}
+```
+
+
+
+### <span id="Contains">Contains</span>
+
+<p>Checks if given key is in hashmap or not.</p>
+
+<b>Signature:</b>
+
+```go
+func (hm *HashMap) Contains(key any) bool
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+
+func main() {
+	hm := heap.NewHashMap()
+	hm.Put("a", 1)
+
+    fmt.Println(hm.Contains("a")) //true
+    fmt.Println(hm.Contains("b")) //false
+}
+```

docs/datastructure/hashmap_zh-CN.md

@@ -0,0 +1,209 @@
+# HashMap
+
+HashMap 数据结构实现
+
+<div STYLE="page-break-after: always;"></div>
+
+## 源码
+
+- [https://github.com/duke-git/lancet/blob/main/datastructure/hashmap/hashmap.go](https://github.com/duke-git/lancet/blob/main/datastructure/hashmap/hashmap.go)
+
+<div STYLE="page-break-after: always;"></div>
+
+## 用法
+
+```go
+import (
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## 目录
+
+- [HashMap](#hashmap)
+  - [源码](#源码)
+  - [用法](#用法)
+  - [目录](#目录)
+  - [API 文档](#api-文档)
+    - [<span id="NewHashMap">NewHashMap</span>](#newhashmap)
+    - [<span id="NewHashMapWithCapacity">NewHashMapWithCapacity</span>](#newhashmapwithcapacity)
+    - [<span id="Get">Get</span>](#get)
+    - [<span id="Put">Put</span>](#put)
+    - [<span id="Delete">Delete</span>](#delete)
+    - [<span id="Contains">Contains</span>](#contains)
+
+<div STYLE="page-break-after: always;"></div>
+
+## API 文档
+
+### <span id="NewHashMap">NewHashMap</span>
+
+<p>新建默认容量（1 << 10）的HashMap指针实例</p>
+
+<b>函数签名:</b>
+
+```go
+func NewHashMap() *HashMap
+```
+
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+
+func main() {
+    hm := heap.NewHashMap()
+    fmt.Println(hm)
+}
+```
+
+### <span id="NewHashMapWithCapacity">NewHashMapWithCapacity</span>
+
+<p>新建指定容量和长度的HashMap指针实例.</p>
+
+<b>函数签名:</b>
+
+```go
+func NewHashMapWithCapacity(size, capacity uint64) *HashMap
+```
+
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+
+func main() {
+    hm := heap.NewHashMapWithCapacity(uint64(100), uint64(1000))
+    fmt.Println(hm)
+}
+```
+
+### <span id="Get">Get</span>
+
+<p>在hashmap中根据key获取值</p>
+
+<b>函数签名:</b>
+
+```go
+func (hm *HashMap) Get(key any) any
+```
+
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+
+func main() {
+	hm := heap.NewHashMap()
+	val := hm.Get("a")
+
+    fmt.Println(val) //nil
+}
+```
+
+### <span id="Put">Put</span>
+
+<p>将key-value放入hashmap中</p>
+
+<b>函数签名:</b>
+
+```go
+func (hm *HashMap) Put(key any, value any) any
+```
+
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+
+func main() {
+	hm := heap.NewHashMap()
+	hm.Put("a", 1)
+
+	val := hm.Get("a")
+    fmt.Println(val) //1
+}
+```
+
+### <span id="Delete">Delete</span>
+
+<p>将指定的key从hashmap中删除</p>
+
+<b>函数签名:</b>
+
+```go
+func (hm *HashMap) Delete(key any)
+```
+
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+
+func main() {
+	hm := heap.NewHashMap()
+	hm.Put("a", 1)
+	val := hm.Get("a")
+    fmt.Println(val) //1
+
+	hm.Delete("a")
+	val = hm.Get("a")
+    fmt.Println(val) //nil
+}
+```
+
+### <span id="Contains">Contains</span>
+
+<p>判断hashmap中是否包含指定的key</p>
+
+<b>函数签名:</b>
+
+```go
+func (hm *HashMap) Contains(key any) bool
+```
+
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+
+func main() {
+	hm := heap.NewHashMap()
+	hm.Put("a", 1)
+
+    fmt.Println(hm.Contains("a")) //true
+    fmt.Println(hm.Contains("b")) //false
+}
+```

docs/datastructure/heap.md

@@ -0,0 +1,364 @@
+# Heap
+Heap is a binary heap tree implemented by slice.
+
+<div STYLE="page-break-after: always;"></div>
+
+## Source
+
+- [https://github.com/duke-git/lancet/blob/main/datastructure/heap/maxheap.go](https://github.com/duke-git/lancet/blob/main/datastructure/heap/maxheap.go)
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## Usage
+```go
+import (
+    heap "github.com/duke-git/lancet/v2/datastructure/heap"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## Index
+
+- [MaxHeap](#MaxHeap)
+- [Push](#Push)
+- [Pop](#Pop)
+- [Peek](#Peek)
+- [Data](#Data)
+- [Size](#Size)
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## Documentation
+
+### 1. MaxHeap
+MaxHeap is a binary heap tree implemented by slice, The key of the root node is both greater than or equal to the key value of the left subtree and greater than or equal to the key value of the right subtree.
+
+### <span id="NewMaxHeap">NewMaxHeap</span>
+<p>Return a NewMaxHeap pointer instance.</p>
+
+<b>Signature:</b>
+
+```go
+type MaxHeap[T any] struct {
+	data       []T
+	comparator lancetconstraints.Comparator
+}
+func NewMaxHeap[T any](comparator lancetconstraints.Comparator) *MaxHeap[T]
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    heap "github.com/duke-git/lancet/v2/datastructure/heap"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    maxHeap := heap.NewMaxHeap[int](&intComparator{})
+    fmt.Println(maxHeap)
+}
+```
+
+
+
+
+### <span id="Push">Push</span>
+<p>Push value into the heap</p>
+
+<b>Signature:</b>
+
+```go
+func (h *MaxHeap[T]) Push(value T)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    heap "github.com/duke-git/lancet/v2/datastructure/heap"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    maxHeap := heap.NewMaxHeap[int](&intComparator{})
+    values := []int{6, 5, 2, 4, 7, 10, 12, 1, 3, 8, 9, 11}
+
+	for _, v := range values {
+		maxHeap.Push(v)
+	}
+
+    fmt.Println(maxHeap.Data()) //[]int{12, 9, 11, 4, 8, 10, 7, 1, 3, 5, 6, 2}
+}
+```
+
+
+
+
+### <span id="Pop">Pop</span>
+<p>Pop return the largest value, and remove it from the heap if heap is empty, return zero value and fasle</p>
+
+<b>Signature:</b>
+
+```go
+func (h *MaxHeap[T]) Pop() (T, bool)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    heap "github.com/duke-git/lancet/v2/datastructure/heap"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    maxHeap := heap.NewMaxHeap[int](&intComparator{})
+    values := []int{6, 5, 2, 4, 7, 10, 12, 1, 3, 8, 9, 11}
+
+	for _, v := range values {
+		maxHeap.Push(v)
+	}
+    val, ok := maxHeap.Pop()
+
+    fmt.Println(val) //12
+    fmt.Println(ok) //true
+}
+```
+
+
+
+### <span id="Peek">Peek</span>
+<p>Return the largest element from the heap without removing it, if heap is empty, it returns zero value and false.</p>
+
+<b>Signature:</b>
+
+```go
+func (h *MaxHeap[T]) Peek() (T, bool)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    heap "github.com/duke-git/lancet/v2/datastructure/heap"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    maxHeap := heap.NewMaxHeap[int](&intComparator{})
+    values := []int{6, 5, 2, 4, 7, 10, 12, 1, 3, 8, 9, 11}
+
+	for _, v := range values {
+		maxHeap.Push(v)
+	}
+    val, ok := maxHeap.Peek()
+
+    fmt.Println(val) //12
+    fmt.Println(maxHeap.Size()) //12
+}
+```
+
+
+
+### <span id="Data">Data</span>
+<p>Return all element of the heap</p>
+
+<b>Signature:</b>
+
+```go
+func (h *MaxHeap[T]) Data() []T
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    heap "github.com/duke-git/lancet/v2/datastructure/heap"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    maxHeap := heap.NewMaxHeap[int](&intComparator{})
+    values := []int{6, 5, 2, 4, 7, 10, 12, 1, 3, 8, 9, 11}
+
+	for _, v := range values {
+		maxHeap.Push(v)
+	}
+
+    fmt.Println(maxHeap.Data()) //[]int{12, 9, 11, 4, 8, 10, 7, 1, 3, 5, 6, 2}
+}
+```
+
+
+### <span id="Size">Size</span>
+<p>Return the number of elements in the heap</p>
+
+<b>Signature:</b>
+
+```go
+func (h *MaxHeap[T]) Size() int
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    heap "github.com/duke-git/lancet/v2/datastructure/heap"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    maxHeap := heap.NewMaxHeap[int](&intComparator{})
+    values := []int{6, 5, 2}
+
+	for _, v := range values {
+		maxHeap.Push(v)
+	}
+
+    fmt.Println(maxHeap.Size()) //3
+}
+```
+
+
+
+### <span id="PrintStructure">PrintStructure</span>
+<p>Print the tree structure of the heap</p>
+
+<b>Signature:</b>
+
+```go
+func (h *MaxHeap[T]) PrintStructure()
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    heap "github.com/duke-git/lancet/v2/datastructure/heap"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    maxHeap := heap.NewMaxHeap[int](&intComparator{})
+    values := []int{6, 5, 2, 4, 7, 10, 12, 1, 3, 8, 9, 11}
+
+	for _, v := range values {
+		maxHeap.Push(v)
+	}
+
+    fmt.Println(maxHeap.PrintStructure())
+//        12
+//    9       11
+//  4   8   10   7
+// 1 3 5 6 2
+}
+```

docs/datastructure/heap_zh-CN.md

@@ -0,0 +1,364 @@
+# Heap
+堆，切片实现的二叉堆数据结构。
+
+<div STYLE="page-break-after: always;"></div>
+
+## 源码
+
+- [https://github.com/duke-git/lancet/blob/main/datastructure/heap/maxheap.go](https://github.com/duke-git/lancet/blob/main/datastructure/heap/maxheap.go)
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## 用法
+```go
+import (
+    heap "github.com/duke-git/lancet/v2/datastructure/heap"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## 目录
+
+- [MaxHeap](#MaxHeap)
+- [Push](#Push)
+- [Pop](#Pop)
+- [Peek](#Peek)
+- [Data](#Data)
+- [Size](#Size)
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## API文档
+
+### 1. MaxHeap
+MaxHeap是通过slice实现的二叉堆树，根节点的key既大于等于左子树的key值且大于等于右子树的key值。
+
+### <span id="NewMaxHeap">NewMaxHeap</span>
+<p>返回NewMaxHeap指针实例</p>
+
+<b>函数签名:</b>
+
+```go
+type MaxHeap[T any] struct {
+	data       []T
+	comparator lancetconstraints.Comparator
+}
+func NewMaxHeap[T any](comparator lancetconstraints.Comparator) *MaxHeap[T]
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    heap "github.com/duke-git/lancet/v2/datastructure/heap"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    maxHeap := heap.NewMaxHeap[int](&intComparator{})
+    fmt.Println(maxHeap)
+}
+```
+
+
+
+
+### <span id="Push">Push</span>
+<p>向堆中插入数据</p>
+
+<b>函数签名:</b>
+
+```go
+func (h *MaxHeap[T]) Push(value T)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    heap "github.com/duke-git/lancet/v2/datastructure/heap"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    maxHeap := heap.NewMaxHeap[int](&intComparator{})
+    values := []int{6, 5, 2, 4, 7, 10, 12, 1, 3, 8, 9, 11}
+
+	for _, v := range values {
+		maxHeap.Push(v)
+	}
+
+    fmt.Println(maxHeap.Data()) //[]int{12, 9, 11, 4, 8, 10, 7, 1, 3, 5, 6, 2}
+}
+```
+
+
+
+
+### <span id="Pop">Pop</span>
+<p>返回堆中最大值并将其从堆中删除，如果堆为空，返回零值并返回false</p>
+
+<b>函数签名:</b>
+
+```go
+func (h *MaxHeap[T]) Pop() (T, bool)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    heap "github.com/duke-git/lancet/v2/datastructure/heap"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    maxHeap := heap.NewMaxHeap[int](&intComparator{})
+    values := []int{6, 5, 2, 4, 7, 10, 12, 1, 3, 8, 9, 11}
+
+	for _, v := range values {
+		maxHeap.Push(v)
+	}
+    val, ok := maxHeap.Pop()
+
+    fmt.Println(val) //12
+    fmt.Println(ok) //true
+}
+```
+
+
+
+### <span id="Peek">Peek</span>
+<p>返回堆中最大值，如果堆为空，返回零值并返回false</p>
+
+<b>函数签名:</b>
+
+```go
+func (h *MaxHeap[T]) Peek() (T, bool)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    heap "github.com/duke-git/lancet/v2/datastructure/heap"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    maxHeap := heap.NewMaxHeap[int](&intComparator{})
+    values := []int{6, 5, 2, 4, 7, 10, 12, 1, 3, 8, 9, 11}
+
+	for _, v := range values {
+		maxHeap.Push(v)
+	}
+    val, ok := maxHeap.Peek()
+
+    fmt.Println(val) //12
+    fmt.Println(maxHeap.Size()) //12
+}
+```
+
+
+
+### <span id="Data">Data</span>
+<p>返回堆中全部元素的切片</p>
+
+<b>函数签名:</b>
+
+```go
+func (h *MaxHeap[T]) Data() []T
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    heap "github.com/duke-git/lancet/v2/datastructure/heap"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    maxHeap := heap.NewMaxHeap[int](&intComparator{})
+    values := []int{6, 5, 2, 4, 7, 10, 12, 1, 3, 8, 9, 11}
+
+	for _, v := range values {
+		maxHeap.Push(v)
+	}
+
+    fmt.Println(maxHeap.Data()) //[]int{12, 9, 11, 4, 8, 10, 7, 1, 3, 5, 6, 2}
+}
+```
+
+
+### <span id="Size">Size</span>
+<p>返回堆中元素的数量</p>
+
+<b>函数签名:</b>
+
+```go
+func (h *MaxHeap[T]) Size() int
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    heap "github.com/duke-git/lancet/v2/datastructure/heap"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    maxHeap := heap.NewMaxHeap[int](&intComparator{})
+    values := []int{6, 5, 2}
+
+	for _, v := range values {
+		maxHeap.Push(v)
+	}
+
+    fmt.Println(maxHeap.Size()) //3
+}
+```
+
+
+
+### <span id="PrintStructure">PrintStructure</span>
+<p>打印堆的树形结构</p>
+
+<b>函数签名:</b>
+
+```go
+func (h *MaxHeap[T]) PrintStructure()
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    heap "github.com/duke-git/lancet/v2/datastructure/heap"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    maxHeap := heap.NewMaxHeap[int](&intComparator{})
+    values := []int{6, 5, 2, 4, 7, 10, 12, 1, 3, 8, 9, 11}
+
+	for _, v := range values {
+		maxHeap.Push(v)
+	}
+
+    fmt.Println(maxHeap.PrintStructure())
+//        12
+//    9       11
+//  4   8   10   7
+// 1 3 5 6 2
+}
+```

docs/datastructure/list.md

@@ -0,0 +1,884 @@
+# List
+List is a linear table, implemented with slice.
+
+<div STYLE="page-break-after: always;"></div>
+
+## Source
+
+- [https://github.com/duke-git/lancet/blob/main/datastructure/list/list.go](https://github.com/duke-git/lancet/blob/main/datastructure/list/list.go)
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## Usage
+```go
+import (
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## Index
+
+- [NewList](#NewList)
+- [Contain](#Contain)
+- [Data](#Data)
+- [ValueOf](#ValueOf)
+- [IndexOf](#IndexOf)
+- [LastIndexOf](#LastIndexOf)
+- [IndexOfFunc](#IndexOfFunc)
+- [LastIndexOfFunc](#LastIndexOfFunc)
+- [Push](#Push)
+- [PopFirst](#PopFirst)
+- [PopLast](#PopLast)
+- [DeleteAt](#DeleteAt)
+- [InsertAt](#InsertAt)
+- [UpdateAt](#UpdateAt)
+- [Equal](#Equal)
+- [IsEmpty](#IsEmpty)
+- [Clear](#Clear)
+- [Clone](#Clone)
+- [Merge](#Merge)
+- [Size](#Size)
+- [Cap](#Cap)
+- [Swap](#Swap)
+- [Reverse](#Reverse)
+- [Unique](#Unique)
+- [Union](#Union)
+- [Intersection](#Intersection)
+- [SubList](#SubList)
+- [DeleteIf](#DeleteIf)
+
+<div STYLE="page-break-after: always;"></div>
+
+## Documentation
+
+### <span id="NewList">NewList</span>
+<p>List is a linear table, implemented with slice.
+NewList function return a list pointer</p>
+
+<b>Signature:</b>
+
+```go
+type List[T any] struct {
+	data []T
+}
+func NewList[T any](data []T) *List[T]
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+    fmt.Println(li)
+}
+```
+
+
+
+### <span id="Contain">Contain</span>
+<p>Check if the value in the list or not</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) Contain(value T) bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+
+    fmt.Println(li.Contain(1)) //true
+    fmt.Println(li.Contain(0)) //false
+}
+```
+
+
+
+
+### <span id="Data">Data</span>
+<p>Return slice of list data</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) Data() []T
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+    data := li.Data()
+
+    fmt.Println(data) //[]int{1, 2, 3}
+}
+```
+
+
+
+
+### <span id="ValueOf">ValueOf</span>
+<p>Return the value pointer at index in list</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) ValueOf(index int) (*T, bool)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+    v, ok := li.ValueOf(0)
+
+    fmt.Println(*v) //1
+    fmt.Println(ok) //true
+}
+```
+
+
+
+
+### <span id="IndexOf">IndexOf</span>
+<p>Returns the index of value in the list. if not found return -1</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) IndexOf(value T) int
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+
+    fmt.Println(li.IndexOf(1)) //0
+    fmt.Println(li.IndexOf(0)) //-1
+}
+```
+
+### <span id="LastIndexOf">LastIndexOf</span>
+<p> Returns the index of the last occurrence of the value in this list if not found return -1</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) LastIndexOf(value T) int
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3, 1})
+
+    fmt.Println(li.LastIndexOf(1)) // 3
+    fmt.Println(li.LastIndexOf(0)) //-1
+}
+```
+
+### <span id="IndexOfFunc">IndexOfFunc</span>
+<p> IndexOfFunc returns the first index satisfying f(v). if not found return -1</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) IndexOfFunc(f func(T) bool) int 
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+
+    fmt.Println(li.IndexOfFunc(func(a int) bool { return a == 1 })) //0
+    fmt.Println(li.IndexOfFunc(func(a int) bool { return a == 0 })) //-1
+}
+```
+
+### <span id="LastIndexOfFunc">LastIndexOfFunc</span>
+<p>LastIndexOfFunc returns the index of the last occurrence of the value in this list satisfying f(data[i]). if not found return -1</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) LastIndexOfFunc(f func(T) bool) int
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3, 1})
+
+    fmt.Println(li.LastIndexOfFunc(func(a int) bool { return a == 1 })) // 3
+    fmt.Println(li.LastIndexOfFunc(func(a int) bool { return a == 0 })) //-1
+}
+```
+
+
+
+### <span id="Push">Push</span>
+<p>Append value to the list</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) Push(value T)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+    li.Push(4)
+
+    fmt.Println(li.Data()) //[]int{1, 2, 3, 4}
+}
+```
+
+
+
+
+### <span id="PopFirst">PopFirst</span>
+<p>Delete the first value of list and return it</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) PopFirst() (*T, bool)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+    v, ok := li.PopFirst()
+
+    fmt.Println(*v) //1
+    fmt.Println(ok) //true
+    fmt.Println(li.Data()) //2, 3
+}
+```
+
+
+
+
+
+### <span id="PopLast">PopFirst</span>
+<p>Delete the last value of list and return it</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) PopLast() (*T, bool)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+    v, ok := li.PopLast()
+
+    fmt.Println(*v) //3
+    fmt.Println(ok) //true
+    fmt.Println(li.Data()) //1, 2
+}
+```
+
+
+
+
+### <span id="DeleteAt">DeleteAt</span>
+<p>Delete the value of list at index, if index is not between 0 and length of list data, do nothing</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) DeleteAt(index int)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3, 4})
+
+    li.DeleteAt(-1)
+    fmt.Println(li.Data()) //1,2,3,4
+
+    li.DeleteAt(4)
+    fmt.Println(li.Data()) //1,2,3,4
+
+    li.DeleteAt(0)
+    fmt.Println(li.Data()) //2,3,4
+
+    li.DeleteAt(2)
+    fmt.Println(li.Data()) //2,3
+}
+```
+
+
+
+
+### <span id="InsertAt">InsertAt</span>
+<p>Insert value into list at index, if index is not between 0 and length of list data, do nothing</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) InsertAt(index int, value T)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+
+    li.InsertAt(-1, 0)
+    fmt.Println(li.Data()) //1,2,3
+
+    li.InsertAt(4, 0)
+    fmt.Println(li.Data()) //1,2,3
+
+    li.InsertAt(3, 4)
+    fmt.Println(li.Data()) //1,2,3,4
+
+    // li.InsertAt(2, 4)
+    // fmt.Println(li.Data()) //1,2,4,3
+}
+```
+
+
+
+### <span id="UpdateAt">UpdateAt</span>
+<p>Update value of list at index, index shoud between 0 and list size - 1</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) UpdateAt(index int, value T)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+
+    li.UpdateAt(-1, 0)
+    fmt.Println(li.Data()) //1,2,3
+
+    li.UpdateAt(2, 4)
+    fmt.Println(li.Data()) //1,2,4
+
+    li.UpdateAt(3, 5)
+    fmt.Println(li.Data()) //1,2,4
+}
+```
+
+
+### <span id="Equal">Equal</span>
+<p>Compare a list to another list, use reflect.DeepEqual on every element</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) Equal(other *List[T]) bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li1 := list.NewList([]int{1, 2, 3, 4})
+    li2 := list.NewList([]int{1, 2, 3, 4})
+    li3 := list.NewList([]int{1, 2, 3})
+
+    fmt.Println(li1.Equal(li2)) //true
+    fmt.Println(li1.Equal(li3)) //false
+}
+```
+
+
+
+### <span id="IsEmpty">IsEmpty</span>
+<p>Check if a list is empty or not</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) IsEmpty() bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li1 := list.NewList([]int{1, 2, 3})
+    li2 := list.NewList([]int{})
+
+    fmt.Println(li1.IsEmpty()) //false
+    fmt.Println(li2.IsEmpty()) //true
+}
+```
+
+
+
+
+### <span id="Clear">Clear</span>
+<p>Clear the data of list</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) Clear()
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+    li.Clear()
+
+    fmt.Println(li.Data()) // empty
+}
+```
+
+
+
+### <span id="Clone">Clone</span>
+<p>Return a copy of list</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) Clone() *List[T]
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+    cloneList := li.Clone()
+
+    fmt.Println(cloneList.Data()) // 1,2,3
+}
+```
+
+
+
+
+### <span id="Merge">Merge</span>
+<p>Merge two list, return new list, don't change original list</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) Merge(other *List[T]) *List[T]
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li1 := list.NewList([]int{1, 2, 3, 4})
+    li2 := list.NewList([]int{4, 5, 6})
+    li3 := li1.Merge(li2)
+
+    fmt.Println(li3.Data()) //1, 2, 3, 4, 4, 5, 6
+}
+```
+
+
+
+### <span id="Size">Size</span>
+<p>Return number of list data items</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) Size() int
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3, 4})
+
+    fmt.Println(li.Size()) //4
+}
+```
+
+
+
+
+### <span id="Cap">Cap</span>
+<p>Cap return cap of the inner data</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) Cap() int
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+	data := make([]int, 0, 100)
+	
+    li := list.NewList(data)
+
+    fmt.Println(li.Cap()) // 100
+}
+```
+
+
+
+
+### <span id="Swap">Swap</span>
+<p>Swap the value at two index in list</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) Swap(i, j int)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3, 4})
+    li.Swap(0, 3)
+
+    fmt.Println(li.Data()) //4, 2, 3, 1
+}
+```
+
+
+
+
+### <span id="Reverse">Reverse</span>
+<p>Reverse the data item order of list</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) Reverse()
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3, 4})
+    li.Reverse()
+
+    fmt.Println(li.Data()) //4, 3, 2, 1
+}
+```
+
+
+
+
+### <span id="Unique">Unique</span>
+<p>Remove duplicate items in list</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) Unique()
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 2, 3, 4})
+    li.Unique()
+
+    fmt.Println(li.Data()) //1,2,3,4
+}
+```
+
+
+
+
+### <span id="Union">Union</span>
+<p>Creates a new list contain all elements in list l and other, remove duplicate element</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) Union(other *List[T]) *List[T]
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li1 := list.NewList([]int{1, 2, 3, 4})
+    li2 := list.NewList([]int{4, 5, 6})
+    li3 := li1.Union(li2)
+
+    fmt.Println(li3.Data()) //1,2,3,4,5,6
+}
+```
+
+
+
+
+### <span id="Intersection">Intersection</span>
+<p>Creates a new list whose element both be contained in list l and other</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) Intersection(other *List[T]) *List[T]
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li1 := list.NewList([]int{1, 2, 3, 4})
+    li2 := list.NewList([]int{4, 5, 6})
+    li3 := li1.Intersection(li2)
+
+    fmt.Println(li3.Data()) //4
+}
+```
+
+
+
+
+### <span id="SubList">SubList</span>
+<p>SubList returns a sub list of the original list between the specified fromIndex, inclusive, and toIndex, exclusive.</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) SubList(fromIndex, toIndex int) *List[T] 
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    l := list.NewList([]int{1, 2, 3, 4, 5, 6})
+   
+    fmt.Println(l.SubList(2, 5)) // []int{3, 4, 5}
+}
+```
+
+
+
+
+### <span id="DeleteIf">DeleteIf</span>
+<p>DeleteIf delete all satisfying f(data[i]), returns count of removed elements</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) DeleteIf(f func(T) bool) int
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+	l := list.NewList([]int{1, 1, 1, 1, 2, 3, 1, 1, 4, 1, 1, 1, 1, 1, 1})
+
+	fmt.Println(l.DeleteIf(func(a int) bool { return a == 1 })) // 12 
+	fmt.Println(l.Data()) // []int{2, 3, 4}
+}
+```

docs/datastructure/list_zh-CN.md

@@ -0,0 +1,882 @@
+# List
+List是线性表数据结构, 用go切片实现。
+
+<div STYLE="page-break-after: always;"></div>
+
+## 源码
+
+- [https://github.com/duke-git/lancet/blob/main/datastructure/list/list.go](https://github.com/duke-git/lancet/blob/main/datastructure/list/list.go)
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## 用法
+```go
+import (
+    "github.com/duke-git/lancet/v2/datastructure"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## 目录
+
+- [NewList](#NewList)
+- [Contain](#Contain)
+- [Data](#Data)
+- [ValueOf](#ValueOf)
+- [IndexOf](#IndexOf)
+- [LastIndexOf](#LastIndexOf)
+- [IndexOfFunc](#IndexOfFunc)
+- [LastIndexOfFunc](#LastIndexOfFunc)
+- [Push](#Push)
+- [PopFirst](#PopFirst)
+- [PopLast](#PopLast)
+- [DeleteAt](#DeleteAt)
+- [InsertAt](#InsertAt)
+
+- [UpdateAt](#UpdateAt)
+- [Equal](#Equal)
+- [IsEmpty](#IsEmpty)
+- [Clear](#Clear)
+- [Clone](#Clone)
+- [Merge](#Merge)
+- [Size](#Size)
+- [Cap](#Cap)
+- [Swap](#Swap)
+- [Reverse](#Reverse)
+- [Unique](#Unique)
+- [Union](#Union)
+- [Intersection](#Intersection)
+- [SubList](#SubList)
+- [DeleteIf](#DeleteIf)
+
+<div STYLE="page-break-after: always;"></div>
+
+## 文档
+
+### <span id="NewList">NewList</span>
+<p>返回List指针实例</p>
+
+<b>函数签名:</b>
+
+```go
+type List[T any] struct {
+	data []T
+}
+func NewList[T any](data []T) *List[T]
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+    fmt.Println(li)
+}
+```
+
+
+
+### <span id="Contain">Contain</span>
+<p>判断列表中是否包含特定值</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) Contain(value T) bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+
+    fmt.Println(li.Contain(1)) //true
+    fmt.Println(li.Contain(0)) //false
+}
+```
+
+
+
+
+### <span id="Data">Data</span>
+<p>返回List中所有数据（切片）</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) Data() []T
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+    data := li.Data()
+
+    fmt.Println(data) //[]int{1, 2, 3}
+}
+```
+
+
+
+
+### <span id="ValueOf">ValueOf</span>
+<p>返回列表中索引处的值指针</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) ValueOf(index int) (*T, bool)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+    v, ok := li.ValueOf(0)
+
+    fmt.Println(*v) //1
+    fmt.Println(ok) //true
+}
+```
+
+
+
+
+### <span id="IndexOf">IndexOf</span>
+<p>返回列表中值的索引，如果没有找到返回-1</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) IndexOf(value T) int
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+
+    fmt.Println(li.IndexOf(1)) //0
+    fmt.Println(li.IndexOf(0)) //-1
+}
+```
+
+
+### <span id="LastIndexOf">LastIndexOf</span>
+<p>返回列表中最后一次出现的值的索引。如果未找到，则返回-1</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) LastIndexOf(value T) int
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3, 1})
+
+    fmt.Println(li.LastIndexOf(1)) // 3
+    fmt.Println(li.LastIndexOf(0)) //-1
+}
+```
+
+### <span id="IndexOfFunc">IndexOfFunc</span>
+<p>返回第一个符合函数条件的元素的索引。如果未找到，则返回-1</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) IndexOfFunc(f func(T) bool) int 
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+
+    fmt.Println(li.IndexOfFunc(func(a int) bool { return a == 1 })) //0
+    fmt.Println(li.IndexOfFunc(func(a int) bool { return a == 0 })) //-1
+}
+```
+
+### <span id="LastIndexOfFunc">LastIndexOfFunc</span>
+<p>返回最后一个符合函数条件的元素的索引。如果未找到，则返回-1</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) LastIndexOfFunc(f func(T) bool) int
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3, 1})
+
+    fmt.Println(li.LastIndexOfFunc(func(a int) bool { return a == 1 })) // 3
+    fmt.Println(li.LastIndexOfFunc(func(a int) bool { return a == 0 })) //-1
+}
+```
+
+
+
+### <span id="Push">Push</span>
+<p>将值附加到列表末尾</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) Push(value T)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+    li.Push(4)
+
+    fmt.Println(li.Data()) //[]int{1, 2, 3, 4}
+}
+```
+
+
+
+
+### <span id="PopFirst">PopFirst</span>
+<p>删除列表的第一个值并返回该值</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) PopFirst() (*T, bool)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+    v, ok := li.PopFirst()
+
+    fmt.Println(*v) //1
+    fmt.Println(ok) //true
+    fmt.Println(li.Data()) //2, 3
+}
+```
+
+
+
+
+
+### <span id="PopLast">PopFirst</span>
+<p>删除列表的最后一个值并返回该值</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) PopLast() (*T, bool)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+    v, ok := li.PopLast()
+
+    fmt.Println(*v) //3
+    fmt.Println(ok) //true
+    fmt.Println(li.Data()) //1, 2
+}
+```
+
+
+
+
+### <span id="DeleteAt">DeleteAt</span>
+<p>删除索引处列表的值，如果索引不在0和列表数据长度之间，则不执行任何操作</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) DeleteAt(index int)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3, 4})
+
+    li.DeleteAt(-1)
+    fmt.Println(li.Data()) //1,2,3,4
+
+    li.DeleteAt(4)
+    fmt.Println(li.Data()) //1,2,3,4
+
+    li.DeleteAt(0)
+    fmt.Println(li.Data()) //2,3,4
+
+    li.DeleteAt(2)
+    fmt.Println(li.Data()) //2,3
+}
+```
+
+
+
+
+### <span id="InsertAt">InsertAt</span>
+<p>在索引处插入值到列表中，如果索引不在 0 和列表数据长度之间，则不执行任何操作</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) InsertAt(index int, value T)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+
+    li.InsertAt(-1, 0)
+    fmt.Println(li.Data()) //1,2,3
+
+    li.InsertAt(4, 0)
+    fmt.Println(li.Data()) //1,2,3
+
+    li.InsertAt(3, 4)
+    fmt.Println(li.Data()) //1,2,3,4
+
+    // li.InsertAt(2, 4)
+    // fmt.Println(li.Data()) //1,2,4,3
+}
+```
+
+
+
+### <span id="UpdateAt">UpdateAt</span>
+<p>更新索引处列表的值，索引应该在0和列表数据长度-1之间</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) UpdateAt(index int, value T)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+
+    li.UpdateAt(-1, 0)
+    fmt.Println(li.Data()) //1,2,3
+
+    li.UpdateAt(2, 4)
+    fmt.Println(li.Data()) //1,2,4
+
+    li.UpdateAt(3, 5)
+    fmt.Println(li.Data()) //1,2,4
+}
+```
+
+
+### <span id="Equal">Equal</span>
+<p>比较一个列表和另一个列表，在每个元素上使用 reflect.DeepEqual</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) Equal(other *List[T]) bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li1 := list.NewList([]int{1, 2, 3, 4})
+    li2 := list.NewList([]int{1, 2, 3, 4})
+    li3 := list.NewList([]int{1, 2, 3})
+
+    fmt.Println(li1.Equal(li2)) //true
+    fmt.Println(li1.Equal(li3)) //false
+}
+```
+
+
+
+### <span id="IsEmpty">IsEmpty</span>
+<p>判断列表是否为空</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) IsEmpty() bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li1 := list.NewList([]int{1, 2, 3})
+    li2 := list.NewList([]int{})
+
+    fmt.Println(li1.IsEmpty()) //false
+    fmt.Println(li2.IsEmpty()) //true
+}
+```
+
+
+
+
+### <span id="Clear">Clear</span>
+<p>清空列表数据</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) Clear()
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+    li.Clear()
+
+    fmt.Println(li.Data()) // empty
+}
+```
+
+
+
+### <span id="Clone">Clone</span>
+<p>返回列表的一个拷贝</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) Clone() *List[T]
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3})
+    cloneList := li.Clone()
+
+    fmt.Println(cloneList.Data()) // 1,2,3
+}
+```
+
+
+
+
+### <span id="Merge">Merge</span>
+<p>合并两个列表，返回新的列表</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) Merge(other *List[T]) *List[T]
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li1 := list.NewList([]int{1, 2, 3, 4})
+    li2 := list.NewList([]int{4, 5, 6})
+    li3 := li1.Merge(li2)
+
+    fmt.Println(li3.Data()) //1, 2, 3, 4, 4, 5, 6
+}
+```
+
+
+
+### <span id="Size">Size</span>
+<p>返回列表数据项的数量</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) Size() int
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3, 4})
+
+    fmt.Println(li.Size()) //4
+}
+```
+
+
+
+### <span id="Cap">Cap</span>
+<p>返回列表数据容量</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) Cap() int
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+	data := make([]int, 0, 100)
+	
+    li := list.NewList(data)
+
+    fmt.Println(li.Cap()) // 100
+}
+```
+
+
+
+### <span id="Swap">Swap</span>
+<p>交换列表中两个索引位置的值</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) Swap(i, j int)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3, 4})
+    li.Swap(0, 3)
+
+    fmt.Println(li.Data()) //4, 2, 3, 1
+}
+```
+
+
+
+
+### <span id="Reverse">Reverse</span>
+<p>反转列表的数据项顺序</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) Reverse()
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 3, 4})
+    li.Reverse()
+
+    fmt.Println(li.Data()) //4, 3, 2, 1
+}
+```
+
+
+
+
+### <span id="Unique">Unique</span>
+<p>列表去除重复数据项</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) Unique()
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li := list.NewList([]int{1, 2, 2, 3, 4})
+    li.Unique()
+
+    fmt.Println(li.Data()) //1,2,3,4
+}
+```
+
+
+
+
+### <span id="Union">Union</span>
+<p>两个列表取并集，去除重复数据项</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) Union(other *List[T]) *List[T]
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li1 := list.NewList([]int{1, 2, 3, 4})
+    li2 := list.NewList([]int{4, 5, 6})
+    li3 := li1.Union(li2)
+
+    fmt.Println(li3.Data()) //1,2,3,4,5,6
+}
+```
+
+
+
+
+### <span id="Intersection">Intersection</span>
+<p>两个列表取交集</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) Intersection(other *List[T]) *List[T]
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    li1 := list.NewList([]int{1, 2, 3, 4})
+    li2 := list.NewList([]int{4, 5, 6})
+    li3 := li1.Intersection(li2)
+
+    fmt.Println(li3.Data()) //4
+}
+```
+
+
+
+### <span id="SubList">SubList</span>
+<p>SubList returns a sub list of the original list between the specified fromIndex, inclusive, and toIndex, exclusive.</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) SubList(fromIndex, toIndex int) *List[T] 
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    l := list.NewList([]int{1, 2, 3, 4, 5, 6})
+   
+    fmt.Println(l.SubList(2, 5)) // []int{3, 4, 5}
+}
+```
+
+
+
+
+### <span id="DeleteIf">DeleteIf</span>
+<p>删除列表中所有符合函数（调用函数返回true)的元素，返回删除元素的数量</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) DeleteIf(f func(T) bool) int
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+	l := list.NewList([]int{1, 1, 1, 1, 2, 3, 1, 1, 4, 1, 1, 1, 1, 1, 1})
+
+	fmt.Println(l.DeleteIf(func(a int) bool { return a == 1 })) // 12 
+	fmt.Println(l.Data()) // []int{2, 3, 4}
+}
+```

docs/datastructure/set.md

@@ -0,0 +1,489 @@
+# Set
+Set is a data container, like list, but elements of set is not duplicate.
+
+<div STYLE="page-break-after: always;"></div>
+
+## Source
+
+- [https://github.com/duke-git/lancet/blob/main/datastructure/set/set.go](https://github.com/duke-git/lancet/blob/main/datastructure/set/set.go)
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## Usage
+```go
+import (
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## Index
+
+- [NewSet](#NewSet)
+- [Values](#Values)
+- [Add](#Add)
+- [Delete](#Delete)
+- [Contain](#Contain)
+- [ContainAll](#ContainAll)
+- [Clone](#Clone)
+- [Size](#Size)
+- [Equal](#Equal)
+- [Iterate](#Iterate)
+- [IsEmpty](#IsEmpty)
+- [Union](#Union)
+- [Intersection](#Intersection)
+
+- [SymmetricDifference](#SymmetricDifference)
+- [Minus](#Minus)
+
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## Documentation
+
+### <span id="NewSet">NewSet</span>
+<p>Make a Set instance</p>
+
+<b>Signature:</b>
+
+```go
+type Set[T comparable] map[T]bool
+func NewSet[T comparable](values ...T) Set[T]
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    st := set.NewSet[int](1,2,2,3)
+    fmt.Println(st.Values()) //1,2,3
+}
+```
+
+
+
+
+### <span id="Values">Values</span>
+<p>Return slice of all set data</p>
+
+<b>Signature:</b>
+
+```go
+func (s Set[T]) Values() []T
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    st := set.NewSet[int](1,2,2,3)
+    fmt.Println(st.Values()) //1,2,3
+}
+```
+
+
+
+
+### <span id="Add">Add</span>
+<p>Add value to set</p>
+
+<b>Signature:</b>
+
+```go
+func (s Set[T]) Add(values ...T)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    st := set.NewSet[int]()
+    st.Add(1, 2, 3)
+
+    fmt.Println(st.Values()) //1,2,3
+}
+```
+
+
+
+### <span id="Delete">Delete</span>
+<p>Delete value in set</p>
+
+<b>Signature:</b>
+
+```go
+func (s Set[T]) Delete(values ...T)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    st := set.NewSet[int]()
+    st.Add(1, 2, 3)
+
+    set.Delete(3)
+    fmt.Println(st.Values()) //1,2
+}
+```
+
+
+
+### <span id="Contain">Contain</span>
+<p>Check if value is in set or not</p>
+
+<b>Signature:</b>
+
+```go
+func (s Set[T]) Contain(value T) bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    st := set.NewSet[int]()
+    st.Add(1, 2, 3)
+
+    fmt.Println(st.Contain(1)) //true
+    fmt.Println(st.Contain(4)) //false
+}
+```
+
+
+
+
+### <span id="ContainAll">ContainAll</span>
+<p>Checks if set contains another set</p>
+
+<b>Signature:</b>
+
+```go
+func (s Set[T]) ContainAll(other Set[T]) bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+	set2 := set.NewSet(1, 2)
+	set3 := set.NewSet(1, 2, 3, 4)
+
+    fmt.Println(set1.ContainAll(set2)) //true
+    fmt.Println(set1.ContainAll(set3)) //false
+}
+```
+
+
+
+### <span id="Size">Size</span>
+<p>Get the number of elements in set</p>
+
+<b>Signature:</b>
+
+```go
+func (s Set[T]) Size() int
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+
+    fmt.Println(set1.Size()) //3
+}
+```
+
+
+
+### <span id="Clone">Clone</span>
+<p>Make a copy of set</p>
+
+<b>Signature:</b>
+
+```go
+func (s Set[T]) Clone() Set[T]
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+    set2 := set1.Clone()
+
+    fmt.Println(set1.Size() == set2.Size()) //true
+    fmt.Println(set1.ContainAll(set2)) //true
+}
+```
+
+
+
+
+### <span id="Equal">Equal</span>
+<p>Check if two sets has same elements or not</p>
+
+<b>Signature:</b>
+
+```go
+func (s Set[T]) Equal(other Set[T]) bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+    set2 := set.NewSet(1, 2, 3)
+    set3 := set.NewSet(1, 2, 3, 4)
+
+    fmt.Println(set1.Equal(set2)) //true
+    fmt.Println(set1.Equal(set3)) //false
+}
+```
+
+
+
+### <span id="Iterate">Iterate</span>
+<p>Call function by every element of set</p>
+
+<b>Signature:</b>
+
+```go
+func (s Set[T]) Iterate(fn func(value T))
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+    arr := []int{}
+    set.Iterate(func(value int) {
+        arr = append(arr, value)
+    })
+
+    fmt.Println(arr) //1,2,3
+}
+```
+
+
+
+### <span id="IsEmpty">IsEmpty</span>
+<p>Check if the set is empty or not</p>
+
+<b>Signature:</b>
+
+```go
+func (s Set[T]) IsEmpty() bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+    set2 := set.NewSet()
+
+    fmt.Println(set1.IsEmpty()) //false
+    fmt.Println(set2.IsEmpty()) //true
+}
+```
+
+
+
+### <span id="Union">Union</span>
+<p>Create a new set contain all element of set s and other</p>
+
+<b>Signature:</b>
+
+```go
+func (s Set[T]) Union(other Set[T]) Set[T]
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+    set2 := set.NewSet(2, 3, 4, 5)
+    set3 := set1.Union(set2)
+
+    fmt.Println(set3.Values()) //1,2,3,4,5
+}
+```
+
+
+
+### <span id="Intersection">Intersection</span>
+<p>Create a new set whose element both be contained in set s and other</p>
+
+<b>Signature:</b>
+
+```go
+func (s Set[T]) Intersection(other Set[T]) Set[T]
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+    set2 := set.NewSet(2, 3, 4, 5)
+    set3 := set1.Intersection(set2)
+
+    fmt.Println(set3.Values()) //2,3
+}
+```
+
+
+
+
+
+### <span id="SymmetricDifference">SymmetricDifference</span>
+<p>Create a new set whose element is in set1 or set2, but not in both set1 and set2</p>
+
+<b>Signature:</b>
+
+```go
+func (s Set[T]) SymmetricDifference(other Set[T]) Set[T]
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+	set2 := set.NewSet(2, 3, 4, 5)
+	set3 := set1.SymmetricDifference(set2)
+
+    fmt.Println(set3.Values()) //1,4,5
+}
+```
+
+
+
+
+
+### <span id="Minus">Minus</span>
+<p>Create an set of whose element in origin set but not in compared set</p>
+
+<b>Signature:</b>
+
+```go
+func (s Set[T]) Minus(comparedSet Set[T]) Set[T]
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+	set2 := set.NewSet(2, 3, 4, 5)
+	set3 := set.NewSet(2, 3)
+
+    res1 := set1.Minus(set2)
+    fmt.Println(res1.Values()) //1
+
+    res2 := set2.Minus(set3)
+    fmt.Println(res2.Values()) //4,5
+}
+```
+
+
+

docs/datastructure/set_zh-CN.md

@@ -0,0 +1,489 @@
+# Set
+Set集合数据结构，类似列表。Set中元素不重复。
+
+<div STYLE="page-break-after: always;"></div>
+
+## 源码
+
+- [https://github.com/duke-git/lancet/blob/main/datastructure/set/set.go](https://github.com/duke-git/lancet/blob/main/datastructure/set/set.go)
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## 用法
+```go
+import (
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## 目录
+
+- [NewSet](#NewSet)
+- [Values](#Values)
+- [Add](#Add)
+- [Delete](#Delete)
+- [Contain](#Contain)
+- [ContainAll](#ContainAll)
+- [Clone](#Clone)
+- [Size](#Size)
+- [Equal](#Equal)
+- [Iterate](#Iterate)
+- [IsEmpty](#IsEmpty)
+- [Union](#Union)
+- [Intersection](#Intersection)
+
+- [SymmetricDifference](#SymmetricDifference)
+- [Minus](#Minus)
+
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## 文档
+
+### <span id="NewSet">NewSet</span>
+<p>返回Set结构体对象</p>
+
+<b>函数签名:</b>
+
+```go
+type Set[T comparable] map[T]bool
+func NewSet[T comparable](values ...T) Set[T]
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    st := set.NewSet[int](1,2,2,3)
+    fmt.Println(st.Values()) //1,2,3
+}
+```
+
+
+
+
+### <span id="Values">Values</span>
+<p>获取集合中所有元素的切片</p>
+
+<b>函数签名:</b>
+
+```go
+func (s Set[T]) Values() []T
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    st := set.NewSet[int](1,2,2,3)
+    fmt.Println(st.Values()) //1,2,3
+}
+```
+
+
+
+
+### <span id="Add">Add</span>
+<p>向集合中添加元素</p>
+
+<b>函数签名:</b>
+
+```go
+func (s Set[T]) Add(values ...T)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    st := set.NewSet[int]()
+    st.Add(1, 2, 3)
+
+    fmt.Println(st.Values()) //1,2,3
+}
+```
+
+
+
+### <span id="Delete">Delete</span>
+<p>删除集合中元素</p>
+
+<b>函数签名:</b>
+
+```go
+func (s Set[T]) Delete(values ...T)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    st := set.NewSet[int]()
+    st.Add(1, 2, 3)
+
+    set.Delete(3)
+    fmt.Println(st.Values()) //1,2
+}
+```
+
+
+
+### <span id="Contain">Contain</span>
+<p>判断集合是否包含某个值</p>
+
+<b>函数签名:</b>
+
+```go
+func (s Set[T]) Contain(value T) bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    st := set.NewSet[int]()
+    st.Add(1, 2, 3)
+
+    fmt.Println(st.Contain(1)) //true
+    fmt.Println(st.Contain(4)) //false
+}
+```
+
+
+
+
+### <span id="ContainAll">ContainAll</span>
+<p>判断集合是否包含另一个集合</p>
+
+<b>函数签名:</b>
+
+```go
+func (s Set[T]) ContainAll(other Set[T]) bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+	set2 := set.NewSet(1, 2)
+	set3 := set.NewSet(1, 2, 3, 4)
+
+    fmt.Println(set1.ContainAll(set2)) //true
+    fmt.Println(set1.ContainAll(set3)) //false
+}
+```
+
+
+
+### <span id="Size">Size</span>
+<p>获取集合中元素的个数</p>
+
+<b>函数签名:</b>
+
+```go
+func (s Set[T]) Size() int
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+
+    fmt.Println(set1.Size()) //3
+}
+```
+
+
+
+### <span id="Clone">Clone</span>
+<p>克隆一个集合</p>
+
+<b>函数签名:</b>
+
+```go
+func (s Set[T]) Clone() Set[T]
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+    set2 := set1.Clone()
+
+    fmt.Println(set1.Size() == set2.Size()) //true
+    fmt.Println(set1.ContainAll(set2)) //true
+}
+```
+
+
+
+
+### <span id="Equal">Equal</span>
+<p>比较两个集合是否相等，包含相同元素为相等</p>
+
+<b>函数签名:</b>
+
+```go
+func (s Set[T]) Equal(other Set[T]) bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+    set2 := set.NewSet(1, 2, 3)
+    set3 := set.NewSet(1, 2, 3, 4)
+
+    fmt.Println(set1.Equal(set2)) //true
+    fmt.Println(set1.Equal(set3)) //false
+}
+```
+
+
+
+### <span id="Iterate">Iterate</span>
+<p>迭代结合，在每个元素上调用函数</p>
+
+<b>函数签名:</b>
+
+```go
+func (s Set[T]) Iterate(fn func(value T))
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+    arr := []int{}
+    set.Iterate(func(value int) {
+        arr = append(arr, value)
+    })
+
+    fmt.Println(arr) //1,2,3
+}
+```
+
+
+
+### <span id="IsEmpty">IsEmpty</span>
+<p>判断集合是否为空</p>
+
+<b>函数签名:</b>
+
+```go
+func (s Set[T]) IsEmpty() bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+    set2 := set.NewSet()
+
+    fmt.Println(set1.IsEmpty()) //false
+    fmt.Println(set2.IsEmpty()) //true
+}
+```
+
+
+
+### <span id="Union">Union</span>
+<p>求两个集合的并集</p>
+
+<b>函数签名:</b>
+
+```go
+func (s Set[T]) Union(other Set[T]) Set[T]
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+    set2 := set.NewSet(2, 3, 4, 5)
+    set3 := set1.Union(set2)
+
+    fmt.Println(set3.Values()) //1,2,3,4,5
+}
+```
+
+
+
+### <span id="Intersection">Intersection</span>
+<p>求两个集合的交集</p>
+
+<b>函数签名:</b>
+
+```go
+func (s Set[T]) Intersection(other Set[T]) Set[T]
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+    set2 := set.NewSet(2, 3, 4, 5)
+    set3 := set1.Intersection(set2)
+
+    fmt.Println(set3.Values()) //2,3
+}
+```
+
+
+
+
+
+### <span id="SymmetricDifference">SymmetricDifference</span>
+<p>返回一个集合，其中元素在第一个集合或第二个集合中，且不同时存在于两个集合中</p>
+
+<b>函数签名:</b>
+
+```go
+func (s Set[T]) SymmetricDifference(other Set[T]) Set[T]
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+	set2 := set.NewSet(2, 3, 4, 5)
+	set3 := set1.SymmetricDifference(set2)
+
+    fmt.Println(set3.Values()) //1,4,5
+}
+```
+
+
+
+
+
+### <span id="Minus">Minus</span>
+<p>创建一个集合，其元素在原始集中但不在比较集中</p>
+
+<b>函数签名:</b>
+
+```go
+func (s Set[T]) Minus(comparedSet Set[T]) Set[T]
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    set1 := set.NewSet(1, 2, 3)
+	set2 := set.NewSet(2, 3, 4, 5)
+	set3 := set.NewSet(2, 3)
+
+    res1 := set1.Minus(set2)
+    fmt.Println(res1.Values()) //1
+
+    res2 := set2.Minus(set3)
+    fmt.Println(res2.Values()) //4,5
+}
+```
+
+
+

docs/datastructure/stack.md

@@ -0,0 +1,611 @@
+# Stack
+Stack is an abstract data type that serves as a collection of elements. Elements follow the LIFO principle. FIFO is last-in, first-out, meaning that the most recently produced items are recorded as sold first.
+
+<div STYLE="page-break-after: always;"></div>
+
+## Source
+
+- [https://github.com/duke-git/lancet/blob/main/datastructure/stack/arraystack.go](https://github.com/duke-git/lancet/blob/main/datastructure/stack/arraystack.go)
+- [https://github.com/duke-git/lancet/blob/main/datastructure/stack/linkedstack.go](https://github.com/duke-git/lancet/blob/main/datastructure/stack/linkedstack.go)
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## Usage
+```go
+import (
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## Index
+
+### 1. ArrayStack
+
+- [NewArrayStack](#NewArrayStack)
+- [Push](#ArrayStack_Push)
+- [Pop](#ArrayStack_Pop)
+- [Peak](#ArrayStack_Peak)
+- [Data](#ArrayStack_Data)
+- [Size](#ArrayStack_Size)
+- [IsEmpty](#ArrayStack_IsEmpty)
+- [Clear](#ArrayStack_Clear)
+
+### 2. LinkedStack
+
+- [NewLinkedStack](#NewLinkedStack)
+- [Push](#LinkedStack_Push)
+- [Pop](#LinkedStack_Pop)
+- [Peak](#LinkedStack_Peak)
+- [Data](#LinkedStack_Data)
+- [Size](#LinkedStack_Size)
+- [IsEmpty](#LinkedStack_IsEmpty)
+- [Clear](#LinkedStack_Clear)
+- [Print](#LinkedStack_Print)
+
+<div STYLE="page-break-after: always;"></div>
+
+## Documentation
+
+### 1. ArrayStack
+ArrayStack is a stack implemented by slice.
+
+### <span id="NewArrayStack">NewArrayStack</span>
+<p>Return a empty ArrayStack pointer</p>
+
+<b>Signature:</b>
+
+```go
+type ArrayStack[T any] struct {
+	data   []T
+	length int
+}
+func NewArrayStack[T any]() *ArrayStack[T]
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewArrayStack[int]()
+    fmt.Println(sk)
+}
+```
+
+
+
+
+### <span id="ArrayStack_Push">Push</span>
+<p>Push element into array stack</p>
+
+<b>Signature:</b>
+
+```go
+func (s *ArrayStack[T]) Push(value T)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewArrayStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    fmt.Println(sk.Data()) //[]int{3, 2, 1}
+}
+```
+
+
+
+
+### <span id="ArrayStack_Pop">Pop</span>
+<p>Delete the top element of stack then return it, if stack is empty, return nil and error</p>
+
+<b>Signature:</b>
+
+```go
+func (s *ArrayStack[T]) Pop() (*T, error)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewArrayStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    val, err := sk.Pop()
+    fmt.Println(err) //nil
+    fmt.Println(*val) //3
+
+    fmt.Println(sk.Data()) //[]int{2, 1}
+}
+```
+
+
+
+
+### <span id="ArrayStack_Peak">Peak</span>
+<p>Return the top element of array stack</p>
+
+<b>Signature:</b>
+
+```go
+func (s *ArrayStack[T]) Peak() (*T, error)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewArrayStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    val, err := sk.Peak()
+    fmt.Println(err) //nil
+    fmt.Println(*val) //3
+
+    fmt.Println(sk.Data()) //[]int{3, 2, 1}
+}
+```
+
+
+
+
+### <span id="ArrayStack_Data">Data</span>
+<p>Return a slice of all data in array stack</p>
+
+<b>Signature:</b>
+
+```go
+func (s *ArrayStack[T]) Data() []T
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewArrayStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    fmt.Println(sk.Data()) //[]int{3, 2, 1}
+}
+```
+
+
+
+
+### <span id="ArrayStack_Size">Size</span>
+<p>Return number of elements in array stack</p>
+
+<b>Signature:</b>
+
+```go
+func (s *ArrayStack[T]) Size() int
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewArrayStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    fmt.Println(sk.Size()) //3
+}
+```
+
+
+
+
+### <span id="ArrayStack_IsEmpty">IsEmpty</span>
+<p>Check if array stack is empty or not</p>
+
+<b>Signature:</b>
+
+```go
+func (s *ArrayStack[T]) IsEmpty() bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewArrayStack[int]()
+    fmt.Println(sk.IsEmpty()) //true
+
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    fmt.Println(sk.IsEmpty()) //false
+}
+```
+
+
+
+
+### <span id="ArrayStack_Clear">Clear</span>
+<p>Clear all elments in array stack</p>
+
+<b>Signature:</b>
+
+```go
+func (s *ArrayStack[T]) Clear()
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewArrayStack[int]()
+
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    sk.Clear()
+
+    fmt.Println(sk.Data()) //[]int{}
+}
+```
+
+
+
+### 2. LinkedStack
+LinkedStack is a stack implemented by linked list.
+
+### <span id="NewLinkedStack">NewLinkedStack</span>
+<p>Return a empty LinkedStack pointer</p>
+
+<b>Signature:</b>
+
+```go
+type StackNode[T any] struct {
+	Value T
+	Next  *StackNode[T]
+}
+type LinkedStack[T any] struct {
+	top    *datastructure.StackNode[T]
+	length int
+}
+func NewLinkedStack[T any]() *LinkedStack[T]
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewLinkedStack[int]()
+    fmt.Println(sk)
+}
+```
+
+
+
+
+### <span id="LinkedStack_Push">Push</span>
+<p>Push element into linked stack</p>
+
+<b>Signature:</b>
+
+```go
+func (s *LinkedStack[T]) Push(value T)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewLinkedStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    fmt.Println(sk.Data()) //[]int{3, 2, 1}
+}
+```
+
+
+
+
+### <span id="LinkedStack_Pop">Pop</span>
+<p>Delete the top element of stack then return it, if stack is empty, return nil and error</p>
+
+<b>Signature:</b>
+
+```go
+func (s *LinkedStack[T]) Pop() (*T, error)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewLinkedStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    val, err := sk.Pop()
+    fmt.Println(err) //nil
+    fmt.Println(*val) //3
+
+    fmt.Println(sk.Data()) //[]int{2, 1}
+}
+```
+
+
+
+
+### <span id="LinkedStack_Peak">Peak</span>
+<p>Return the top element of linked stack</p>
+
+<b>Signature:</b>
+
+```go
+func (s *LinkedStack[T]) Peak() (*T, error)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewLinkedStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    val, err := sk.Peak()
+    fmt.Println(err) //nil
+    fmt.Println(*val) //3
+
+    fmt.Println(sk.Data()) //[]int{3, 2, 1}
+}
+```
+
+
+
+
+### <span id="LinkedStack_Data">Data</span>
+<p>Return a slice of all data in linked stack</p>
+
+<b>Signature:</b>
+
+```go
+func (s *LinkedStack[T]) Data() []T
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewLinkedStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    fmt.Println(sk.Data()) //[]int{3, 2, 1}
+}
+```
+
+
+
+
+### <span id="LinkedStack_Size">Size</span>
+<p>Return number of elements in linked stack</p>
+
+<b>Signature:</b>
+
+```go
+func (s *LinkedStack[T]) Size() int
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewLinkedStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    fmt.Println(sk.Size()) //3
+}
+```
+
+
+
+
+### <span id="LinkedStack_IsEmpty">IsEmpty</span>
+<p>Check if linked stack is empty or not</p>
+
+<b>Signature:</b>
+
+```go
+func (s *LinkedStack[T]) IsEmpty() bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewLinkedStack[int]()
+    fmt.Println(sk.IsEmpty()) //true
+
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    fmt.Println(sk.IsEmpty()) //false
+}
+```
+
+
+
+
+### <span id="LinkedStack_Clear">Clear</span>
+<p>Clear all elments in linked stack</p>
+
+<b>Signature:</b>
+
+```go
+func (s *LinkedStack[T]) Clear()
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewLinkedStack[int]()
+
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    sk.Clear()
+
+    fmt.Println(sk.Data()) //[]int{}
+}
+```
+
+
+
+
+### <span id="LinkedStack_Print">Print</span>
+<p>Print the structure of a linked stack</p>
+
+<b>Signature:</b>
+
+```go
+func (s *LinkedStack[T]) Print()
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewLinkedStack[int]()
+
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+
+    sk.Print() //[ &{Value:3 Next:0xc000010260}, &{Value:2 Next:0xc000010250}, &{Value:1 Next:<nil>},  ]
+}
+```

docs/datastructure/stack_zh-CN.md

@@ -0,0 +1,611 @@
+# Stack
+栈数据结构，包括ArrayStack（数组栈）和LinkedStack（链表栈）。
+
+<div STYLE="page-break-after: always;"></div>
+
+## 源码
+
+- [https://github.com/duke-git/lancet/blob/main/datastructure/stack/arraystack.go](https://github.com/duke-git/lancet/blob/main/datastructure/stack/arraystack.go)
+- [https://github.com/duke-git/lancet/blob/main/datastructure/stack/linkedstack.go](https://github.com/duke-git/lancet/blob/main/datastructure/stack/linkedstack.go)
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## 用法
+```go
+import (
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## 目录
+
+### 1. ArrayStack（数组栈）
+
+- [NewArrayStack](#NewArrayStack)
+- [Push](#ArrayStack_Push)
+- [Pop](#ArrayStack_Pop)
+- [Peak](#ArrayStack_Peak)
+- [Data](#ArrayStack_Data)
+- [Size](#ArrayStack_Size)
+- [IsEmpty](#ArrayStack_IsEmpty)
+- [Clear](#ArrayStack_Clear)
+
+### 2. LinkedStack（链表栈）
+
+- [NewLinkedStack](#NewLinkedStack)
+- [Push](#LinkedStack_Push)
+- [Pop](#LinkedStack_Pop)
+- [Peak](#LinkedStack_Peak)
+- [Data](#LinkedStack_Data)
+- [Size](#LinkedStack_Size)
+- [IsEmpty](#LinkedStack_IsEmpty)
+- [Clear](#LinkedStack_Clear)
+- [Print](#LinkedStack_Print)
+
+<div STYLE="page-break-after: always;"></div>
+
+## 文档
+
+### 1. ArrayStack
+用切片实现栈结构
+
+### <span id="NewArrayStack">NewArrayStack</span>
+<p>返回ArrayStack指针实例</p>
+
+<b>函数签名:</b>
+
+```go
+type ArrayStack[T any] struct {
+	data   []T
+	length int
+}
+func NewArrayStack[T any]() *ArrayStack[T]
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewArrayStack[int]()
+    fmt.Println(sk)
+}
+```
+
+
+
+
+### <span id="ArrayStack_Push">Push</span>
+<p>将元素加入数组栈</p>
+
+<b>函数签名:</b>
+
+```go
+func (s *ArrayStack[T]) Push(value T)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewArrayStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    fmt.Println(sk.Data()) //[]int{3, 2, 1}
+}
+```
+
+
+
+
+### <span id="ArrayStack_Pop">Pop</span>
+<p>删除栈顶元素并返回该元素指针</p>
+
+<b>函数签名:</b>
+
+```go
+func (s *ArrayStack[T]) Pop() (*T, error)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewArrayStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    val, err := sk.Pop()
+    fmt.Println(err) //nil
+    fmt.Println(*val) //3
+
+    fmt.Println(sk.Data()) //[]int{2, 1}
+}
+```
+
+
+
+
+### <span id="ArrayStack_Peak">Peak</span>
+<p>返回栈顶元素指针</p>
+
+<b>函数签名:</b>
+
+```go
+func (s *ArrayStack[T]) Peak() (*T, error)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewArrayStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    val, err := sk.Peak()
+    fmt.Println(err) //nil
+    fmt.Println(*val) //3
+
+    fmt.Println(sk.Data()) //[]int{3, 2, 1}
+}
+```
+
+
+
+
+### <span id="ArrayStack_Data">Data</span>
+<p>返回栈中所有元素组成的切片</p>
+
+<b>函数签名:</b>
+
+```go
+func (s *ArrayStack[T]) Data() []T
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewArrayStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    fmt.Println(sk.Data()) //[]int{3, 2, 1}
+}
+```
+
+
+
+
+### <span id="ArrayStack_Size">Size</span>
+<p>返回栈中元素的数量</p>
+
+<b>函数签名:</b>
+
+```go
+func (s *ArrayStack[T]) Size() int
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewArrayStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    fmt.Println(sk.Size()) //3
+}
+```
+
+
+
+
+### <span id="ArrayStack_IsEmpty">IsEmpty</span>
+<p>判断栈是否为空</p>
+
+<b>函数签名:</b>
+
+```go
+func (s *ArrayStack[T]) IsEmpty() bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewArrayStack[int]()
+    fmt.Println(sk.IsEmpty()) //true
+
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    fmt.Println(sk.IsEmpty()) //false
+}
+```
+
+
+
+
+### <span id="ArrayStack_Clear">Clear</span>
+<p>清空栈元素，使栈为空</p>
+
+<b>函数签名:</b>
+
+```go
+func (s *ArrayStack[T]) Clear()
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewArrayStack[int]()
+
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    sk.Clear()
+
+    fmt.Println(sk.Data()) //[]int{}
+}
+```
+
+
+
+### 2. LinkedStack
+链表实现的栈结构。
+
+### <span id="NewLinkedStack">NewLinkedStack</span>
+<p>返回LinkedStack指针实例</p>
+
+<b>函数签名:</b>
+
+```go
+type StackNode[T any] struct {
+	Value T
+	Next  *StackNode[T]
+}
+type LinkedStack[T any] struct {
+	top    *datastructure.StackNode[T]
+	length int
+}
+func NewLinkedStack[T any]() *LinkedStack[T]
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewLinkedStack[int]()
+    fmt.Println(sk)
+}
+```
+
+
+
+
+### <span id="LinkedStack_Push">Push</span>
+<p>将元素加入链表栈</p>
+
+<b>函数签名:</b>
+
+```go
+func (s *LinkedStack[T]) Push(value T)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewLinkedStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    fmt.Println(sk.Data()) //[]int{3, 2, 1}
+}
+```
+
+
+
+
+### <span id="LinkedStack_Pop">Pop</span>
+<p>删除栈顶元素并返回该元素指针</p>
+
+<b>函数签名:</b>
+
+```go
+func (s *LinkedStack[T]) Pop() (*T, error)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewLinkedStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    val, err := sk.Pop()
+    fmt.Println(err) //nil
+    fmt.Println(*val) //3
+
+    fmt.Println(sk.Data()) //[]int{2, 1}
+}
+```
+
+
+
+
+### <span id="LinkedStack_Peak">Peak</span>
+<p>返回栈顶元素指针</p>
+
+<b>函数签名:</b>
+
+```go
+func (s *LinkedStack[T]) Peak() (*T, error)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewLinkedStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    val, err := sk.Peak()
+    fmt.Println(err) //nil
+    fmt.Println(*val) //3
+
+    fmt.Println(sk.Data()) //[]int{3, 2, 1}
+}
+```
+
+
+
+
+### <span id="LinkedStack_Data">Data</span>
+<p>返回栈中所有元素组成的切片</p>
+
+<b>函数签名:</b>
+
+```go
+func (s *LinkedStack[T]) Data() []T
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewLinkedStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    fmt.Println(sk.Data()) //[]int{3, 2, 1}
+}
+```
+
+
+
+
+### <span id="LinkedStack_Size">Size</span>
+<p>返回栈中元素的数量</p>
+
+<b>函数签名:</b>
+
+```go
+func (s *LinkedStack[T]) Size() int
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewLinkedStack[int]()
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    fmt.Println(sk.Size()) //3
+}
+```
+
+
+
+
+### <span id="LinkedStack_IsEmpty">IsEmpty</span>
+<p>判断栈是否为空</p>
+
+<b>函数签名:</b>
+
+```go
+func (s *LinkedStack[T]) IsEmpty() bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewLinkedStack[int]()
+    fmt.Println(sk.IsEmpty()) //true
+
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    fmt.Println(sk.IsEmpty()) //false
+}
+```
+
+
+
+
+### <span id="LinkedStack_Clear">Clear</span>
+<p>清空栈元素，使栈为空</p>
+
+<b>函数签名:</b>
+
+```go
+func (s *LinkedStack[T]) Clear()
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewLinkedStack[int]()
+
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+    sk.Clear()
+
+    fmt.Println(sk.Data()) //[]int{}
+}
+```
+
+
+
+
+### <span id="LinkedStack_Print">Print</span>
+<p>打印链表栈结构</p>
+
+<b>函数签名:</b>
+
+```go
+func (s *LinkedStack[T]) Print()
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    stack "github.com/duke-git/lancet/v2/datastructure/stack"
+)
+
+func main() {
+    sk := stack.NewLinkedStack[int]()
+
+    sk.Push(1)
+    sk.Push(2)
+    sk.Push(3)
+
+
+    sk.Print() //[ &{Value:3 Next:0xc000010260}, &{Value:2 Next:0xc000010250}, &{Value:1 Next:<nil>},  ]
+}
+```

docs/datastructure/tree.md

@@ -0,0 +1,527 @@
+# Tree
+Tree is a collection of tree nodes. Each tree node has a value, a left pointer point to left node and a right pointer point to right node.
+
+<div STYLE="page-break-after: always;"></div>
+
+## Source
+
+- [https://github.com/duke-git/lancet/blob/main/datastructure/tree/bstree.go](https://github.com/duke-git/lancet/blob/main/datastructure/tree/bstree.go)
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## Usage
+```go
+import (
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## Index
+
+### 1. BSTree
+
+- [NewBSTree](#NewBSTree)
+- [Insert](#BSTree_Insert)
+- [Delete](#BSTree_Delete)
+- [PreOrderTraverse](#BSTree_PreOrderTraverse)
+- [InOrderTraverse](#BSTree_InOrderTraverse)
+- [PostOrderTraverse](#BSTree_PostOrderTraverse)
+  
+- [LevelOrderTraverse](#BSTree_LevelOrderTraverse)
+- [Depth](#BSTree_Depth)
+- [HasSubTree](#BSTree_HasSubTree)
+- [Print](#BSTree_Print)
+
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## Documentation
+
+## 1. BSTree
+BSTree is a binary search tree data structure in which each node has at two children, which are referred to as the left child and the right child. In BSTree: leftNode < rootNode < rightNode. Type T should implements Compare function in lancetconstraints.Comparator interface.
+
+### <span id="NewBSTree">NewBSTree</span>
+<p>Make a BSTree pointer instance</p>
+
+<b>Signature:</b>
+
+```go
+func NewBSTree[T any](rootData T, comparator lancetconstraints.Comparator) *BSTree[T]
+
+type BSTree[T any] struct {
+	root       *datastructure.TreeNode[T]
+	comparator lancetconstraints.Comparator
+}
+
+type TreeNode[T any] struct {
+	Value T
+	Left  *TreeNode[T]
+	Right *TreeNode[T]
+}
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    bstree := tree.NewBSTree(6, &intComparator{})
+    fmt.Println(bstree) //
+}
+```
+
+
+
+
+### <span id="BSTree_Insert">Insert</span>
+<p>Insert value into binary search tree</p>
+
+<b>Signature:</b>
+
+```go
+func (t *BSTree[T]) Insert(data T)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    bstree := tree.NewBSTree(6, &intComparator{})
+    bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+    fmt.Println(bstree.PreOrderTraverse()) //6, 5, 2, 4, 7
+}
+```
+
+
+
+
+### <span id="BSTree_Delete">Delete</span>
+<p>Delete value of binary search tree</p>
+
+<b>Signature:</b>
+
+```go
+func (t *BSTree[T]) Delete(data T)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    bstree := tree.NewBSTree(6, &intComparator{})
+    bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+    bstree.Delete(4)
+
+    fmt.Println(bstree.PreOrderTraverse()) //2, 5, 6, 7
+}
+```
+
+
+
+
+### <span id="BSTree_PreOrderTraverse">PreOrderTraverse</span>
+<p>Traverse tree nodes in pre order</p>
+
+<b>Signature:</b>
+
+```go
+func (t *BSTree[T]) PreOrderTraverse() []T
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    bstree := tree.NewBSTree(6, &intComparator{})
+    bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+    fmt.Println(bstree.PreOrderTraverse()) //6, 5, 2, 4, 7
+}
+```
+
+
+
+
+### <span id="BSTree_InOrderTraverse">InOrderTraverse</span>
+<p>Traverse tree nodes in middle order</p>
+
+<b>Signature:</b>
+
+```go
+func (t *BSTree[T]) InOrderTraverse() []T
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    bstree := tree.NewBSTree(6, &intComparator{})
+    bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+    fmt.Println(bstree.InOrderTraverse()) //2, 4, 5, 6, 7
+}
+```
+
+
+
+
+### <span id="BSTree_PostOrderTraverse">PostOrderTraverse</span>
+<p>Traverse tree nodes in post order</p>
+
+<b>Signature:</b>
+
+```go
+func (t *BSTree[T]) PostOrderTraverse() []T
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    bstree := tree.NewBSTree(6, &intComparator{})
+    bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+    fmt.Println(bstree.PostOrderTraverse()) //5, 2, 4, 7, 6
+}
+```
+
+
+
+
+### <span id="BSTree_LevelOrderTraverse">LevelOrderTraverse</span>
+<p>Traverse tree nodes in node level order</p>
+
+<b>Signature:</b>
+
+```go
+func (t *BSTree[T]) LevelOrderTraverse() []T
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    bstree := tree.NewBSTree(6, &intComparator{})
+    bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+    fmt.Println(bstree.LevelOrderTraverse()) //6, 5, 7, 2, 4
+}
+```
+
+
+
+
+### <span id="BSTree_Depth">Depth</span>
+<p>Get the depth of a binary saerch tree</p>
+
+<b>Signature:</b>
+
+```go
+func (t *BSTree[T]) Depth() int
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    bstree := tree.NewBSTree(6, &intComparator{})
+    bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+    fmt.Println(bstree.Depth()) //4
+}
+```
+
+
+
+
+### <span id="BSTree_HasSubTree">HasSubTree</span>
+<p>Check if the given tree is sub tree of origin tree or not</p>
+
+<b>Signature:</b>
+
+```go
+func (t *BSTree[T]) HasSubTree(subTree *BSTree[T]) bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    superTree := tree.NewBSTree(8, &intComparator{})
+	superTree.Insert(4)
+	superTree.Insert(5)
+	superTree.Insert(6)
+	superTree.Insert(9)
+	superTree.Insert(4)
+
+    subTree := tree.NewBSTree(5, &intComparator{})
+	subTree.Insert(4)
+	subTree.Insert(6)
+
+    fmt.Println(superTree.HasSubTree(subTree)) //true
+    fmt.Println(subTree.HasSubTree(superTree)) //false
+}
+```
+
+
+
+
+### <span id="BSTree_Print">Print</span>
+<p>Print the structure of binary saerch tree</p>
+
+<b>Signature:</b>
+
+```go
+func (t *BSTree[T]) Print()
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    bstree := tree.NewBSTree(6, &intComparator{})
+    bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+    fmt.Println(bstree.Print())
+//        6
+//       / \
+//      /   \
+//     /     \
+//    /       \
+//    5       7
+//   /
+//  /
+//  2
+//   \
+//    4
+}
+```

docs/datastructure/tree_zh-CN.md

@@ -0,0 +1,527 @@
+# Tree
+树是树节点的集合。 每个树节点都有一个值，一个指向左节点的左指针和一个指向右节点的右指针。
+
+<div STYLE="page-break-after: always;"></div>
+
+## 源码
+
+- [https://github.com/duke-git/lancet/blob/main/datastructure/tree/bstree.go](https://github.com/duke-git/lancet/blob/main/datastructure/tree/bstree.go)
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## 用法
+```go
+import (
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## 目录
+
+### 1. BSTree
+
+- [NewBSTree](#NewBSTree)
+- [Insert](#BSTree_Insert)
+- [Delete](#BSTree_Delete)
+- [PreOrderTraverse](#BSTree_PreOrderTraverse)
+- [InOrderTraverse](#BSTree_InOrderTraverse)
+- [PostOrderTraverse](#BSTree_PostOrderTraverse)
+  
+- [LevelOrderTraverse](#BSTree_LevelOrderTraverse)
+- [Depth](#BSTree_Depth)
+- [HasSubTree](#BSTree_HasSubTree)
+- [Print](#BSTree_Print)
+
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## 文档
+
+## 1. BSTree
+BSTree是一种二叉搜索树数据结构，其中每个节点有两个孩子，分别称为左孩子和右孩子。 在 BSTree 中：leftNode < rootNode < rightNode。 T类型应该实现lancetconstraints.Comparator。
+
+### <span id="NewBSTree">NewBSTree</span>
+<p>返回BSTree指针实例</p>
+
+<b>函数签名:</b>
+
+```go
+func NewBSTree[T any](rootData T, comparator lancetconstraints.Comparator) *BSTree[T]
+
+type BSTree[T any] struct {
+	root       *datastructure.TreeNode[T]
+	comparator lancetconstraints.Comparator
+}
+
+type TreeNode[T any] struct {
+	Value T
+	Left  *TreeNode[T]
+	Right *TreeNode[T]
+}
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    bstree := tree.NewBSTree(6, &intComparator{})
+    fmt.Println(bstree) //
+}
+```
+
+
+
+
+### <span id="BSTree_Insert">Insert</span>
+<p>将值插入二叉搜索树</p>
+
+<b>函数签名:</b>
+
+```go
+func (t *BSTree[T]) Insert(data T)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    bstree := tree.NewBSTree(6, &intComparator{})
+    bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+    fmt.Println(bstree.PreOrderTraverse()) //6, 5, 2, 4, 7
+}
+```
+
+
+
+
+### <span id="BSTree_Delete">Delete</span>
+<p>删除插入二叉搜索树中指定的值</p>
+
+<b>函数签名:</b>
+
+```go
+func (t *BSTree[T]) Delete(data T)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    bstree := tree.NewBSTree(6, &intComparator{})
+    bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+    bstree.Delete(4)
+
+    fmt.Println(bstree.PreOrderTraverse()) //2, 5, 6, 7
+}
+```
+
+
+
+
+### <span id="BSTree_PreOrderTraverse">PreOrderTraverse</span>
+<p>按前序遍历树节点</p>
+
+<b>函数签名:</b>
+
+```go
+func (t *BSTree[T]) PreOrderTraverse() []T
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    bstree := tree.NewBSTree(6, &intComparator{})
+    bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+    fmt.Println(bstree.PreOrderTraverse()) //6, 5, 2, 4, 7
+}
+```
+
+
+
+
+### <span id="BSTree_InOrderTraverse">InOrderTraverse</span>
+<p>按中序遍历树节点</p>
+
+<b>函数签名:</b>
+
+```go
+func (t *BSTree[T]) InOrderTraverse() []T
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    bstree := tree.NewBSTree(6, &intComparator{})
+    bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+    fmt.Println(bstree.InOrderTraverse()) //2, 4, 5, 6, 7
+}
+```
+
+
+
+
+### <span id="BSTree_PostOrderTraverse">PostOrderTraverse</span>
+<p>按后序遍历树节点</p>
+
+<b>函数签名:</b>
+
+```go
+func (t *BSTree[T]) PostOrderTraverse() []T
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    bstree := tree.NewBSTree(6, &intComparator{})
+    bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+    fmt.Println(bstree.PostOrderTraverse()) //5, 2, 4, 7, 6
+}
+```
+
+
+
+
+### <span id="BSTree_LevelOrderTraverse">LevelOrderTraverse</span>
+<p>按节点层次遍历树节点</p>
+
+<b>函数签名:</b>
+
+```go
+func (t *BSTree[T]) LevelOrderTraverse() []T
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    bstree := tree.NewBSTree(6, &intComparator{})
+    bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+    fmt.Println(bstree.LevelOrderTraverse()) //6, 5, 7, 2, 4
+}
+```
+
+
+
+
+### <span id="BSTree_Depth">Depth</span>
+<p>获取树的深度</p>
+
+<b>函数签名:</b>
+
+```go
+func (t *BSTree[T]) Depth() int
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    bstree := tree.NewBSTree(6, &intComparator{})
+    bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+    fmt.Println(bstree.Depth()) //4
+}
+```
+
+
+
+
+### <span id="BSTree_HasSubTree">HasSubTree</span>
+<p>判断给定树是否是子树</p>
+
+<b>函数签名:</b>
+
+```go
+func (t *BSTree[T]) HasSubTree(subTree *BSTree[T]) bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    superTree := tree.NewBSTree(8, &intComparator{})
+	superTree.Insert(4)
+	superTree.Insert(5)
+	superTree.Insert(6)
+	superTree.Insert(9)
+	superTree.Insert(4)
+
+    subTree := tree.NewBSTree(5, &intComparator{})
+	subTree.Insert(4)
+	subTree.Insert(6)
+
+    fmt.Println(superTree.HasSubTree(subTree)) //true
+    fmt.Println(subTree.HasSubTree(superTree)) //false
+}
+```
+
+
+
+
+### <span id="BSTree_Print">Print</span>
+<p>打印树结构</p>
+
+<b>函数签名:</b>
+
+```go
+func (t *BSTree[T]) Print()
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    tree "github.com/duke-git/lancet/v2/datastructure/tree"
+)
+
+type intComparator struct{}
+
+func (c *intComparator) Compare(v1, v2 any) int {
+	val1, _ := v1.(int)
+	val2, _ := v2.(int)
+
+	if val1 < val2 {
+		return -1
+	} else if val1 > val2 {
+		return 1
+	}
+	return 0
+}
+
+func main() {
+    bstree := tree.NewBSTree(6, &intComparator{})
+    bstree.Insert(7)
+	bstree.Insert(5)
+	bstree.Insert(2)
+	bstree.Insert(4)
+
+    fmt.Println(bstree.Print())
+//        6
+//       / \
+//      /   \
+//     /     \
+//    /       \
+//    5       7
+//   /
+//  /
+//  2
+//   \
+//    4
+}
+```

docs/fileutil.md

@@ -1,61 +1,49 @@
 # Fileutil
-
 Package fileutil implements some basic functions for file operations.
 
 <div STYLE="page-break-after: always;"></div>
 
 ## Source:
 
-[https://github.com/duke-git/lancet/blob/v1/fileutil/file.go](https://github.com/duke-git/lancet/blob/v1/fileutil/file.go)
+- [https://github.com/duke-git/lancet/blob/main/fileutil/file.go](https://github.com/duke-git/lancet/blob/main/fileutil/file.go)
 
 <div STYLE="page-break-after: always;"></div>
 
 ## Usage:
-
 ```go
 import (
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 ```
 
 <div STYLE="page-break-after: always;"></div>
 
 ## Index
+- [ClearFile](#ClearFile)
+- [CreateFile](#CreateFile)
+- [CreateDir](#CreateDir)
+- [CopyFile](#CopyFile)
+- [FileMode](#FileMode)
+- [MiMeType](#MiMeType)
+- [IsExist](#IsExist)
+- [IsLink](#IsLink)
+- [IsDir](#IsDir)
 
--   [ClearFile](#ClearFile)
--   [CreateFile](#CreateFile)
--   [CreateDir](#CreateDir)
--   [CopyFile](#CopyFile)
--   [FileMode](#FileMode)
--   [MiMeType](#MiMeType)
--   [IsExist](#IsExist)
--   [IsLink](#IsLink)
--   [IsDir](#IsDir)
--   [ListFileNames](#ListFileNames)
--   [RemoveFile](#RemoveFile)
--   [ReadFileToString](#ReadFileToString)
--   [ReadFileByLine](#ReadFileByLine)
--   [Zip](#Zip)
--   [UnZip](#UnZip)
--   [ZipAppendEntry](#ZipAppendEntry)
--   [CurrentPath](#CurrentPath)
--   [IsZipFile](#IsZipFile)
--   [FileSize](#FileSize)
--   [MTime](#MTime)
--   [Sha](#Sha)
--   [ReadCsvFile](#ReadCsvFile)
--   [WriteCsvFile](#WriteCsvFile)
--   [WriteMapsToCsv](#WriteMapsToCsv)
--   [WriteStringToFile](#WriteStringToFile)
--   [WriteBytesToFile](#WriteBytesToFile)
--   [ReadFile](#ReadFile)
+- [ListFileNames](#ListFileNames)
+- [RemoveFile](#RemoveFile)
+- [ReadFileToString](#ReadFileToString)
+- [ReadFileByLine](#ReadFileByLine)
+- [Zip](#Zip)
+- [UnZip](#UnZip)
+- [UnZip](#UnZip)
 
 <div STYLE="page-break-after: always;"></div>
 
 ## Documentation
 
-### <span id="ClearFile">ClearFile</span>
 
+
+### <span id="ClearFile">ClearFile</span>
 <p>Clear the file content, write empty string to the file.</p>
 
 <b>Signature:</b>
@@ -63,7 +51,6 @@ import (
 ```go
 func ClearFile(path string) error
 ```
-
 <b>Example:</b>
 
 ```go
@@ -71,7 +58,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -82,34 +69,7 @@ func main() {
 }
 ```
 
-### <span id="CreateDir">CreateDir</span>
-
-<p>Create directory in absolute path. param `absPath` like /a/, /a/b/.</p>
-
-<b>Signature:</b>
-
-```go
-func CreateDir(absPath string) error
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    err := fileutil.CreateDir("/a/")
-    fmt.Println(err)
-}
-```
-
 ### <span id="CreateFile">CreateFile</span>
-
 <p>Create file in path. return true if create succeed.</p>
 
 <b>Signature:</b>
@@ -117,7 +77,6 @@ func main() {
 ```go
 func CreateFile(path string) bool
 ```
-
 <b>Example:</b>
 
 ```go
@@ -125,7 +84,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -134,16 +93,16 @@ func main() {
 }
 ```
 
-### <span id="CopyFile">CopyFile</span>
 
-<p>Copy src file to dest file. If dest file exist will overwrite it.</p>
+
+### <span id="CreateDir">CreateDir</span>
+<p>Create directory in absolute path. param `absPath` like /a/, /a/b/.</p>
 
 <b>Signature:</b>
 
 ```go
-func CopyFile(srcFilePath string, dstFilePath string) error
+func CreateDir(absPath string) error
 ```
-
 <b>Example:</b>
 
 ```go
@@ -151,7 +110,32 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
+)
+
+func main() {
+    err := fileutil.CreateDir("/a/")
+    fmt.Println(err)
+}
+```
+
+
+### <span id="CopyFile">CopyFile</span>
+<p>Copy src file to dest file. If dest file exist will overwrite it.</p>
+
+<b>Signature:</b>
+
+```go
+func CopyFile(srcFilePath string, dstFilePath string) error
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -162,8 +146,9 @@ func main() {
 }
 ```
 
-### <span id="FileMode">FileMode</span>
 
+
+### <span id="FileMode">FileMode</span>
 <p>Return file mode infomation.</p>
 
 <b>Signature:</b>
@@ -171,7 +156,6 @@ func main() {
 ```go
 func FileMode(path string) (fs.FileMode, error)
 ```
-
 <b>Example:</b>
 
 ```go
@@ -179,7 +163,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -191,16 +175,16 @@ func main() {
 }
 ```
 
-### <span id="MiMeType">MiMeType</span>
 
+
+### <span id="MiMeType">MiMeType</span>
 <p>Get file mime type, 'file' param's type should be string or *os.File.</p>
 
 <b>Signature:</b>
 
 ```go
-func MiMeType(file interface{}) string
+func MiMeType(file any) string
 ```
-
 <b>Example:</b>
 
 ```go
@@ -209,7 +193,7 @@ package main
 import (
     "fmt"
     "os"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -222,8 +206,10 @@ func main() {
 }
 ```
 
-### <span id="IsExist">IsExist</span>
 
+
+
+### <span id="IsExist">IsExist</span>
 <p>Checks if a file or directory exists.</p>
 
 <b>Signature:</b>
@@ -231,7 +217,6 @@ func main() {
 ```go
 func IsExist(path string) bool
 ```
-
 <b>Example:</b>
 
 ```go
@@ -239,7 +224,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -249,8 +234,9 @@ func main() {
 }
 ```
 
-### <span id="IsLink">IsLink</span>
 
+
+### <span id="IsLink">IsLink</span>
 <p>Checks if a file is symbol link or not.</p>
 
 <b>Signature:</b>
@@ -258,7 +244,6 @@ func main() {
 ```go
 func IsLink(path string) bool
 ```
-
 <b>Example:</b>
 
 ```go
@@ -266,7 +251,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -275,16 +260,16 @@ func main() {
 }
 ```
 
-### <span id="IsDir">IsDir</span>
 
+
+### <span id="IsDir">IsDir</span>
 <p>Checks if the path is directy or not.</p>
 
 <b>Signature:</b>
 
 ```go
-func IsDir(path string) bool
+func IsDir(path string) bool 
 ```
-
 <b>Example:</b>
 
 ```go
@@ -292,7 +277,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -304,8 +289,9 @@ func main() {
 }
 ```
 
-### <span id="ListFileNames">ListFileNames</span>
 
+
+### <span id="ListFileNames">ListFileNames</span>
 <p>List all file names in given path.</p>
 
 <b>Signature:</b>
@@ -313,7 +299,6 @@ func main() {
 ```go
 func ListFileNames(path string) ([]string, error)
 ```
-
 <b>Example:</b>
 
 ```go
@@ -321,7 +306,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -330,8 +315,9 @@ func main() {
 }
 ```
 
-### <span id="RemoveFile">RemoveFile</span>
 
+
+### <span id="RemoveFile">RemoveFile</span>
 <p>Remove the file of path.</p>
 
 <b>Signature:</b>
@@ -339,7 +325,6 @@ func main() {
 ```go
 func RemoveFile(path string) error
 ```
-
 <b>Example:</b>
 
 ```go
@@ -347,7 +332,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -358,8 +343,8 @@ func main() {
 }
 ```
 
-### <span id="ReadFileToString">ReadFileToString</span>
 
+### <span id="ReadFileToString">ReadFileToString</span>
 <p>Return string of file content.</p>
 
 <b>Signature:</b>
@@ -367,7 +352,6 @@ func main() {
 ```go
 func ReadFileToString(path string) (string, error)
 ```
-
 <b>Example:</b>
 
 ```go
@@ -376,7 +360,7 @@ package main
 import (
     "fmt"
     "os"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -391,8 +375,9 @@ func main() {
 }
 ```
 
-### <span id="ReadFileByLine">ReadFileByLine</span>
 
+
+### <span id="ReadFileByLine">ReadFileByLine</span>
 <p>Read file line by line, and return slice of lines</p>
 
 <b>Signature:</b>
@@ -400,7 +385,6 @@ func main() {
 ```go
 func ReadFileByLine(path string)([]string, error)
 ```
-
 <b>Example:</b>
 
 ```go
@@ -409,7 +393,7 @@ package main
 import (
     "fmt"
     "os"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -425,8 +409,9 @@ func main() {
 }
 ```
 
-### <span id="Zip">Zip</span>
 
+
+### <span id="Zip">Zip</span>
 <p>Create a zip file of fpath, fpath could be a file or a directory.</p>
 
 <b>Signature:</b>
@@ -434,7 +419,6 @@ func main() {
 ```go
 func Zip(fpath string, destPath string) error
 ```
-
 <b>Example:</b>
 
 ```go
@@ -442,7 +426,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -453,8 +437,10 @@ func main() {
 }
 ```
 
-### <span id="UnZip">UnZip</span>
 
+
+
+### <span id="UnZip">UnZip</span>
 <p>Unzip the file and save it to dest path.</p>
 
 <b>Signature:</b>
@@ -462,7 +448,6 @@ func main() {
 ```go
 func UnZip(zipFile string, destPath string) error
 ```
-
 <b>Example:</b>
 
 ```go
@@ -470,7 +455,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -481,444 +466,7 @@ func main() {
 }
 ```
 
-### <span id="ZipAppendEntry">ZipAppendEntry</span>
 
-<p>Append a single file or directory by fpath to an existing zip file.</p>
 
-<b>Signature:</b>
 
-```go
-func ZipAppendEntry(fpath string, destPath string) error
-```
 
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    err := fileutil.ZipAppendEntry("./test.txt", "./test.zip")
-    if err != nil {
-        fmt.Println(err)
-    }
-}
-```
-
-### <span id="CurrentPath">CurrentPath</span>
-
-<p>return current absolute path.</p>
-
-<b>Signature:</b>
-
-```go
-func CurrentPath() string
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    absPath := CurrentPath()
-    fmt.Println(absPath)
-}
-```
-
-### <span id="IsZipFile">IsZipFile</span>
-
-<p>Checks if file is zip file or not.</p>
-
-<b>Signature:</b>
-
-```go
-func IsZipFile(filepath string) bool
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    isZip := IsZipFile("./zipfile.zip")
-    fmt.Println(isZip)
-}
-```
-
-### <span id="FileSize">FileSize</span>
-
-<p>Returns file size in bytes.</p>
-
-<b>Signature:</b>
-
-```go
-func FileSize(path string) (int64, error)
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    size, err := fileutil.FileSize("./testdata/test.txt")
-
-    fmt.Println(size)
-    fmt.Println(err)
-
-    // Output:
-    // 20
-    // <nil>
-}
-```
-
-### <span id="MTime">MTime</span>
-
-<p>Returns file modified time(unix timestamp).</p>
-
-<b>Signature:</b>
-
-```go
-func MTime(filepath string) (int64, error)
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    mtime, err := fileutil.MTime("./testdata/test.txt")
-
-    fmt.Println(mtime)
-    fmt.Println(err)
-
-    // Output:
-    // 1682391110
-    // <nil>
-}
-```
-
-### <span id="Sha">Sha</span>
-
-<p>returns file sha value, param `shaType` should be 1, 256 or 512.</p>
-
-<b>Signature:</b>
-
-```go
-func Sha(filepath string, shaType ...int) (string, error)
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    sha1, err := fileutil.Sha("./testdata/test.txt", 1)
-    sha256, _ := fileutil.Sha("./testdata/test.txt", 256)
-    sha512, _ := fileutil.Sha("./testdata/test.txt", 512)
-
-    fmt.Println(sha1)
-    fmt.Println(sha256)
-    fmt.Println(sha512)
-    fmt.Println(err)
-
-    // Output:
-    // dda3cf10c5a6ff6c6659a497bf7261b287af2bc7
-    // aa6d0a3fbc3442c228d606da09e0c1dc98c69a1cac3da1909199e0266171df35
-    // d22aba2a1b7a2e2f512756255cc1c3708905646920cb1eb95e45b531ba74774dbbb89baebf1f716220eb9cf4908f1cfc5b2a01267704d9a59f59d77cab609870
-    // <nil>
-}
-```
-
-### <span id="ReadCsvFile">ReadCsvFile</span>
-
-<p>Reads file content into slice.</p>
-
-<b>Signature:</b>
-
-```go
-func ReadCsvFile(filepath string) ([][]string, error)
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    content, err := fileutil.ReadCsvFile("./testdata/test.csv")
-
-    fmt.Println(content)
-    fmt.Println(err)
-
-    // Output:
-    // [[Bob  12  male] [Duke  14  male] [Lucy  16  female]]
-    // <nil>
-}
-```
-
-
-### <span id="WriteCsvFile">WriteCsvFile</span>
-
-<p>Write content to target csv file.</p>
-
-<b>Signature:</b>
-
-```go
-func WriteCsvFile(filepath string, records [][]string, append bool) error
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    data := [][]string{
-        {"Lili", "22", "female"},
-        {"Jim", "21", "male"},
-    }
-    err := WriteCsvFile("./testdata/test2.csv", data, false)
-    fmt.Println(err)
-
-    content, _ := ReadCsvFile("./testdata/test2.csv")
-    fmt.Println(content)
-
-    // Output:
-    // <nil>
-    // [[Lili 22 female] [Jim 21 male]]
-}
-```
-
-
-### <span id="WriteMapsToCsv">WriteMapsToCsv</span>
-
-<p>write slice of map to csv file.</p>
-
-<b>Signature:</b>
-
-```go
-// filepath: path of the CSV file.
-// records: slice of maps to be written. the value of map should be basic type. The maps will be sorted by key in alphabeta order, then be written into csv file.
-// appendToExistingFile: If true, data will be appended to the file if it exists.
-// delimiter: Delimiter to use in the CSV file.
-// headers: order of the csv column headers, needs to be consistent with the key of the map.
-func WriteMapsToCsv(filepath string, records []map[string]interface{}, appendToExistingFile bool, delimiter rune, headers ...[]string) error
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    fpath := "./test.csv"
-    fileutil.CreateFile(fpath)
-
-    f, _ := os.OpenFile(fpath, os.O_WRONLY|os.O_TRUNC, 0777)
-    defer f.Close()
-
-    records := []map[string]interface{}{
-        {"Name": "Lili", "Age": "22", "Gender": "female"},
-        {"Name": "Jim", "Age": "21", "Gender": "male"},
-    }
-
-    headers := []string{"Name", "Age", "Gender"}
-    err := fileutil.WriteMapsToCsv(csvFilePath, records, false, ';', headers)
-
-    if err != nil {
-        log.Fatal(err)
-    }
-
-    content, err := fileutil.ReadCsvFile(csvFilePath, ';')
-
-    fmt.Println(content)
-
-    // Output:
-    // [[Name Age Gender] [Lili 22 female] [Jim 21 male]]
-}
-```
-
-### <span id="WriteBytesToFile">WriteBytesToFile</span>
-
-<p>Writes bytes to target file.</p>
-
-<b>Signature:</b>
-
-```go
-func WriteBytesToFile(filepath string, content []byte) error
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    filepath := "./bytes.txt"
-
-    file, err := os.Create(filepath)
-    if err != nil {
-        return
-    }
-
-    defer file.Close()
-
-    err = fileutil.WriteBytesToFile(filepath, []byte("hello"))
-    if err != nil {
-        return
-    }
-
-    content, err := fileutil.ReadFileToString(filepath)
-    if err != nil {
-        return
-    }
-
-    os.Remove(filepath)
-
-    fmt.Println(content)
-
-    // Output:
-    // hello
-}
-```
-
-### <span id="WriteStringToFile">WriteStringToFile</span>
-
-<p>Writes string to target file.</p>
-
-<b>Signature:</b>
-
-```go
-func WriteStringToFile(filepath string, content string, append bool) error
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    filepath := "./test.txt"
-
-    file, err := os.Create(filepath)
-    if err != nil {
-        return
-    }
-
-    defer file.Close()
-
-    err = fileutil.WriteStringToFile(filepath, "hello", true)
-    if err != nil {
-        return
-    }
-
-    content, err := fileutil.ReadFileToString(filepath)
-    if err != nil {
-        return
-    }
-
-    os.Remove(filepath)
-
-    fmt.Println(content)
-
-    // Output:
-    // hello
-}
-```
-
-### <span id="ReadFile">ReadFile</span>
-
-<p>Read File/URL</p>
-
-<b>Signature:</b>
-
-```go
-func ReadFile(path string) (reader io.ReadCloser, closeFn func(), err error) 
-```
-
-<b>Example:<span style="float:right;display:inline-block;"> </span></b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-   reader, fn, err := ReadFile("https://httpbin.org/robots.txt")
-    if err != nil {
-        return
-    }
-    defer fn()
-
-    dat, err := io.ReadAll(reader)
-    if err != nil {
-        return
-    }
-    fmt.Println(string(dat))
-    // Output:
-    // User-agent: *
-    // Disallow: /deny
-}
-```

docs/fileutil_zh-CN.md

@@ -1,61 +1,48 @@
 # Fileutil
-
-fileutil 包支持文件基本操作。
+fileutil包支持文件基本操作。
 
 <div STYLE="page-break-after: always;"></div>
 
 ## 源码:
 
-[https://github.com/duke-git/lancet/blob/v1/fileutil/file.go](https://github.com/duke-git/lancet/blob/v1/fileutil/file.go)
+- [https://github.com/duke-git/lancet/blob/main/fileutil/file.go](https://github.com/duke-git/lancet/blob/main/fileutil/file.go)
 
 <div STYLE="page-break-after: always;"></div>
 
 ## 用法:
-
 ```go
 import (
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 ```
 
 <div STYLE="page-break-after: always;"></div>
 
 ## 目录
+- [ClearFile](#ClearFile)
+- [CreateFile](#CreateFile)
+- [CreateDir](#CreateDir)
+- [CopyFile](#CopyFile)
+- [FileMode](#FileMode)
+- [MiMeType](#MiMeType)
+- [IsExist](#IsExist)
+- [IsLink](#IsLink)
+- [IsDir](#IsDir)
 
--   [ClearFile](#ClearFile)
--   [CreateFile](#CreateFile)
--   [CreateDir](#CreateDir)
--   [CopyFile](#CopyFile)
--   [FileMode](#FileMode)
--   [MiMeType](#MiMeType)
--   [IsExist](#IsExist)
--   [IsLink](#IsLink)
--   [IsDir](#IsDir)画
--   [ListFileNames](#ListFileNames)
--   [RemoveFile](#RemoveFile)
--   [ReadFileToString](#ReadFileToString)
--   [ReadFileByLine](#ReadFileByLine)
--   [Zip](#Zip)
--   [UnZip](#UnZip)
--   [ZipAppendEntry](#ZipAppendEntry)
--   [CurrentPath](#CurrentPath)
--   [IsZipFile](#IsZipFile)
--   [FileSize](#FileSize)
--   [MTime](#MTime)
--   [Sha](#Sha)
--   [ReadCsvFile](#ReadCsvFile)
--   [WriteCsvFile](#WriteCsvFile)
--   [WriteMapsToCsv](#WriteMapsToCsv)
--   [WriteStringToFile](#WriteStringToFile)
--   [WriteBytesToFile](#WriteBytesToFile)
--   [ReadFile](#ReadFile)
+- [ListFileNames](#ListFileNames)
+- [RemoveFile](#RemoveFile)
+- [ReadFileToString](#ReadFileToString)
+- [ReadFileByLine](#ReadFileByLine)
+- [Zip](#Zip)
+- [UnZip](#UnZip)
 
 <div STYLE="page-break-after: always;"></div>
 
 ## 文档
 
-### <span id="ClearFile">ClearFile</span>
 
+
+### <span id="ClearFile">ClearFile</span>
 <p>清空文件内容</p>
 
 <b>函数签名:</b>
@@ -63,7 +50,6 @@ import (
 ```go
 func ClearFile(path string) error
 ```
-
 <b>例子:</b>
 
 ```go
@@ -71,7 +57,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -82,34 +68,7 @@ func main() {
 }
 ```
 
-### <span id="CreateDir">CreateDir</span>
-
-<p>使用绝对路径创建嵌套目录，例如/a/, /a/b/</p>
-
-<b>函数签名:</b>
-
-```go
-func CreateDir(absPath string) error
-```
-
-<b>例子:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    err := fileutil.CreateDir("/a/")
-    fmt.Println(err)
-}
-```
-
 ### <span id="CreateFile">CreateFile</span>
-
 <p>创建文件，创建成功返回true, 否则返回false</p>
 
 <b>函数签名:</b>
@@ -117,7 +76,6 @@ func main() {
 ```go
 func CreateFile(path string) bool
 ```
-
 <b>例子:</b>
 
 ```go
@@ -125,7 +83,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -134,8 +92,34 @@ func main() {
 }
 ```
 
-### <span id="CopyFile">CopyFile</span>
 
+### <span id="CreateDir">CreateDir</span>
+<p>使用绝对路径创建嵌套目录，例如/a/, /a/b/</p>
+
+<b>函数签名:</b>
+
+```go
+func CreateDir(absPath string) error
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/fileutil"
+)
+
+func main() {
+    err := fileutil.CreateDir("/a/")
+    fmt.Println(err)
+}
+```
+
+
+
+### <span id="CopyFile">CopyFile</span>
 <p>拷贝文件，会覆盖原有的拷贝文件</p>
 
 <b>函数签名:</b>
@@ -143,7 +127,6 @@ func main() {
 ```go
 func CopyFile(srcFilePath string, dstFilePath string) error
 ```
-
 <b>例子:</b>
 
 ```go
@@ -151,7 +134,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -162,8 +145,9 @@ func main() {
 }
 ```
 
-### <span id="FileMode">FileMode</span>
 
+
+### <span id="FileMode">FileMode</span>
 <p>获取文件mode信息</p>
 
 <b>函数签名:</b>
@@ -171,7 +155,6 @@ func main() {
 ```go
 func FileMode(path string) (fs.FileMode, error)
 ```
-
 <b>例子:</b>
 
 ```go
@@ -179,7 +162,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -191,16 +174,16 @@ func main() {
 }
 ```
 
-### <span id="MiMeType">MiMeType</span>
 
+
+### <span id="MiMeType">MiMeType</span>
 <p>获取文件mime类型, 'file'参数的类型必须是string或者*os.File</p>
 
 <b>函数签名:</b>
 
 ```go
-func MiMeType(file interface{}) string
+func MiMeType(file any) string
 ```
-
 <b>例子:</b>
 
 ```go
@@ -209,7 +192,7 @@ package main
 import (
     "fmt"
     "os"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -222,8 +205,10 @@ func main() {
 }
 ```
 
-### <span id="IsExist">IsExist</span>
 
+
+
+### <span id="IsExist">IsExist</span>
 <p>判断文件或目录是否存在</p>
 
 <b>函数签名:</b>
@@ -231,7 +216,6 @@ func main() {
 ```go
 func IsExist(path string) bool
 ```
-
 <b>例子:</b>
 
 ```go
@@ -239,7 +223,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -249,8 +233,9 @@ func main() {
 }
 ```
 
-### <span id="IsLink">IsLink</span>
 
+
+### <span id="IsLink">IsLink</span>
 <p>判断文件是否是符号链接</p>
 
 <b>函数签名:</b>
@@ -258,7 +243,6 @@ func main() {
 ```go
 func IsLink(path string) bool
 ```
-
 <b>例子:</b>
 
 ```go
@@ -266,7 +250,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -275,16 +259,16 @@ func main() {
 }
 ```
 
-### <span id="IsDir">IsDir</span>
 
+
+### <span id="IsDir">IsDir</span>
 <p>判断目录是否存在</p>
 
 <b>函数签名:</b>
 
 ```go
-func IsDir(path string) bool
+func IsDir(path string) bool 
 ```
-
 <b>例子:</b>
 
 ```go
@@ -292,7 +276,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -304,8 +288,9 @@ func main() {
 }
 ```
 
-### <span id="ListFileNames">ListFileNames</span>
 
+
+### <span id="ListFileNames">ListFileNames</span>
 <p>返回目录下所有文件名</p>
 
 <b>函数签名:</b>
@@ -313,7 +298,6 @@ func main() {
 ```go
 func ListFileNames(path string) ([]string, error)
 ```
-
 <b>例子:</b>
 
 ```go
@@ -321,7 +305,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -330,8 +314,9 @@ func main() {
 }
 ```
 
-### <span id="RemoveFile">RemoveFile</span>
 
+
+### <span id="RemoveFile">RemoveFile</span>
 <p>删除文件</p>
 
 <b>函数签名:</b>
@@ -339,7 +324,6 @@ func main() {
 ```go
 func RemoveFile(path string) error
 ```
-
 <b>例子:</b>
 
 ```go
@@ -347,7 +331,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -358,8 +342,8 @@ func main() {
 }
 ```
 
-### <span id="ReadFileToString">ReadFileToString</span>
 
+### <span id="ReadFileToString">ReadFileToString</span>
 <p>读取文件内容并返回字符串</p>
 
 <b>函数签名:</b>
@@ -367,7 +351,6 @@ func main() {
 ```go
 func ReadFileToString(path string) (string, error)
 ```
-
 <b>例子:</b>
 
 ```go
@@ -376,7 +359,7 @@ package main
 import (
     "fmt"
     "os"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -391,8 +374,9 @@ func main() {
 }
 ```
 
-### <span id="ReadFileByLine">ReadFileByLine</span>
 
+
+### <span id="ReadFileByLine">ReadFileByLine</span>
 <p>按行读取文件内容，返回字符串切片包含每一行</p>
 
 <b>函数签名:</b>
@@ -400,7 +384,6 @@ func main() {
 ```go
 func ReadFileByLine(path string)([]string, error)
 ```
-
 <b>例子:</b>
 
 ```go
@@ -409,7 +392,7 @@ package main
 import (
     "fmt"
     "os"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -425,8 +408,9 @@ func main() {
 }
 ```
 
-### <span id="Zip">Zip</span>
 
+
+### <span id="Zip">Zip</span>
 <p>zip压缩文件, fpath参数可以是文件或目录</p>
 
 <b>函数签名:</b>
@@ -434,7 +418,6 @@ func main() {
 ```go
 func Zip(fpath string, destPath string) error
 ```
-
 <b>例子:</b>
 
 ```go
@@ -442,7 +425,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -453,16 +436,17 @@ func main() {
 }
 ```
 
-### <span id="UnZip">UnZip</span>
 
+
+
+### <span id="UnZip">UnZip</span>
 <p>zip解压缩文件并保存在目录中</p>
 
-<b>函数签名:</b>
+<b>Signature:</b>
 
 ```go
 func UnZip(zipFile string, destPath string) error
 ```
-
 <b>例子:</b>
 
 ```go
@@ -470,7 +454,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/fileutil"
+    "github.com/duke-git/lancet/v2/fileutil"
 )
 
 func main() {
@@ -481,442 +465,7 @@ func main() {
 }
 ```
 
-### <span id="ZipAppendEntry">ZipAppendEntry</span>
 
-<p>通过将单个文件或目录追加到现有的zip文件</p>
 
-<b>函数签名:</b>
 
-```go
-func ZipAppendEntry(fpath string, destPath string) error
-```
 
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    err := fileutil.ZipAppendEntry("./test.txt", "./test.zip")
-    if err != nil {
-        fmt.Println(err)
-    }
-}
-```
-
-### <span id="CurrentPath">CurrentPath</span>
-
-<p>返回当前位置的绝对路径。</p>
-
-<b>函数签名:</b>
-
-```go
-func CurrentPath() string
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    absPath := CurrentPath()
-    fmt.Println(absPath)
-}
-```
-
-### <span id="IsZipFile">IsZipFile</span>
-
-<p>判断文件是否是zip压缩文件。</p>
-
-<b>函数签名:</b>
-
-```go
-func IsZipFile(filepath string) bool
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    isZip := IsZipFile("./zipfile.zip")
-    fmt.Println(isZip)
-}
-```
-
-### <span id="FileSize">FileSize</span>
-
-<p>返回文件字节大小。</p>
-
-<b>函数签名:</b>
-
-```go
-func FileSize(path string) (int64, error)
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    size, err := fileutil.FileSize("./testdata/test.txt")
-
-    fmt.Println(size)
-    fmt.Println(err)
-
-    // Output:
-    // 20
-    // <nil>
-}
-```
-
-### <span id="MTime">MTime</span>
-
-<p>返回文件修改时间(unix timestamp).</p>
-
-<b>函数签名:</b>
-
-```go
-func MTime(filepath string) (int64, error)
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    mtime, err := fileutil.MTime("./testdata/test.txt")
-
-    fmt.Println(mtime)
-    fmt.Println(err)
-
-    // Output:
-    // 1682391110
-    // <nil>
-}
-```
-
-### <span id="Sha">Sha</span>
-
-<p>返回文件sha值，参数`shaType` 应传值为: 1, 256，512.</p>
-
-<b>函数签名:</b>
-
-```go
-func Sha(filepath string, shaType ...int) (string, error)
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    sha1, err := fileutil.Sha("./testdata/test.txt", 1)
-    sha256, _ := fileutil.Sha("./testdata/test.txt", 256)
-    sha512, _ := fileutil.Sha("./testdata/test.txt", 512)
-
-    fmt.Println(sha1)
-    fmt.Println(sha256)
-    fmt.Println(sha512)
-    fmt.Println(err)
-
-    // Output:
-    // dda3cf10c5a6ff6c6659a497bf7261b287af2bc7
-    // aa6d0a3fbc3442c228d606da09e0c1dc98c69a1cac3da1909199e0266171df35
-    // d22aba2a1b7a2e2f512756255cc1c3708905646920cb1eb95e45b531ba74774dbbb89baebf1f716220eb9cf4908f1cfc5b2a01267704d9a59f59d77cab609870
-    // <nil>
-}
-```
-
-### <span id="ReadCsvFile">ReadCsvFile</span>
-
-<p>读取csv文件内容到切片</p>
-
-<b>函数签名:</b>
-
-```go
-func ReadCsvFile(filepath string) ([][]string, error)
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    content, err := fileutil.ReadCsvFile("./testdata/test.csv")
-
-    fmt.Println(content)
-    fmt.Println(err)
-
-    // Output:
-    // [[Bob  12  male] [Duke  14  male] [Lucy  16  female]]
-    // <nil>
-}
-```
-
-### <span id="WriteCsvFile">WriteCsvFile</span>
-
-<p>向csv文件写入内容。</p>
-
-<b>函数签名:</b>
-
-```go
-func WriteCsvFile(filepath string, records [][]string, append bool) error
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    data := [][]string{
-        {"Lili", "22", "female"},
-        {"Jim", "21", "male"},
-    }
-    err := WriteCsvFile("./testdata/test2.csv", data, false)
-    fmt.Println(err)
-
-    content, _ := ReadCsvFile("./testdata/test2.csv")
-    fmt.Println(content)
-
-    // Output:
-    // <nil>
-    // [[Lili 22 female] [Jim 21 male]]
-}
-```
-
-### <span id="WriteMapsToCsv">WriteMapsToCsv</span>
-
-<p>将map切片写入csv文件中。</p>
-
-<b>函数签名:</b>
-
-```go
-// filepath: CSV文件路径。
-// records: 写入文件的map切片。map值必须为基本类型。会以map键的字母顺序写入。
-// appendToExistingFile: 是否为追加写模式。
-// delimiter: CSV文件分割符。
-// headers: CSV文件表头顺序（需要与map key保持一致)，不指定时按字母排序。
-func WriteMapsToCsv(filepath string, records []map[string]interface{}, appendToExistingFile bool, delimiter rune, headers ...[]string) error
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    fpath := "./test.csv"
-    fileutil.CreateFile(fpath)
-
-    f, _ := os.OpenFile(fpath, os.O_WRONLY|os.O_TRUNC, 0777)
-    defer f.Close()
-
-    records := []map[string]interface{}{
-        {"Name": "Lili", "Age": "22", "Gender": "female"},
-        {"Name": "Jim", "Age": "21", "Gender": "male"},
-    }
-
-    headers := []string{"Name", "Age", "Gender"}
-    err := fileutil.WriteMapsToCsv(csvFilePath, records, false, ';', headers)
-
-    if err != nil {
-        log.Fatal(err)
-    }
-
-    content, err := fileutil.ReadCsvFile(csvFilePath, ';')
-
-    fmt.Println(content)
-
-    // Output:
-    // [[Name Age Gender] [Lili 22 female] [Jim 21 male]]
-}
-```
-
-### <span id="WriteBytesToFile">WriteBytesToFile</span>
-
-<p>将bytes写入文件。</p>
-
-<b>函数签名:</b>
-
-```go
-func WriteBytesToFile(filepath string, content []byte) error
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    filepath := "./bytes.txt"
-
-    file, err := os.Create(filepath)
-    if err != nil {
-        return
-    }
-
-    defer file.Close()
-
-    err = fileutil.WriteBytesToFile(filepath, []byte("hello"))
-    if err != nil {
-        return
-    }
-
-    content, err := fileutil.ReadFileToString(filepath)
-    if err != nil {
-        return
-    }
-
-    os.Remove(filepath)
-
-    fmt.Println(content)
-
-    // Output:
-    // hello
-}
-```
-
-### <span id="WriteStringToFile">WriteStringToFile</span>
-
-<p>将字符串写入文件。</p>
-
-<b>函数签名:</b>
-
-```go
-func WriteStringToFile(filepath string, content string, append bool) error
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-    filepath := "./test.txt"
-
-    file, err := os.Create(filepath)
-    if err != nil {
-        return
-    }
-
-    defer file.Close()
-
-    err = fileutil.WriteStringToFile(filepath, "hello", true)
-    if err != nil {
-        return
-    }
-
-    content, err := fileutil.ReadFileToString(filepath)
-    if err != nil {
-        return
-    }
-
-    os.Remove(filepath)
-
-    fmt.Println(content)
-
-    // Output:
-    // hello
-}
-```
-
-### <span id="ReadFile">ReadFile</span>
-
-<p>读取文件或者URL</p>
-
-<b>函数签名:</b>
-
-```go
-func ReadFile(path string) (reader io.ReadCloser, closeFn func(), err error)
-```
-
-<b>示例:<span style="float:right;display:inline-block;"></span></b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/fileutil"
-)
-
-func main() {
-   reader, fn, err := ReadFile("https://httpbin.org/robots.txt")
-    if err != nil {
-        return
-    }
-    defer fn()
-
-    dat, err := io.ReadAll(reader)
-    if err != nil {
-        return
-    }
-    fmt.Println(string(dat))
-    // Output:
-    // User-agent: *
-    // Disallow: /deny
-}
-```

docs/formatter.md

@@ -1,50 +1,41 @@
 # Formatter
-
 formatter contains some functions for data formatting.
 
 <div STYLE="page-break-after: always;"></div>
 
 ## Source:
 
-[https://github.com/duke-git/lancet/blob/v1/formatter/formatter.go](https://github.com/duke-git/lancet/blob/v1/formatter/formatter.go)
+- [https://github.com/duke-git/lancet/blob/main/formatter/formatter.go](https://github.com/duke-git/lancet/blob/main/formatter/formatter.go)
 
 <div STYLE="page-break-after: always;"></div>
 
 ## Usage:
-
 ```go
 import (
-    "github.com/duke-git/lancet/formatter"
+    "github.com/duke-git/lancet/v2/formatter"
 )
 ```
 
 <div STYLE="page-break-after: always;"></div>
 
 ## Index
-
--   [Comma](#Comma)
--   [Pretty](#Pretty)
--   [PrettyToWriter](#PrettyToWriter)
--   [DecimalBytes](#DecimalBytes)
--   [BinaryBytes](#BinaryBytes)
--   [ParseDecimalBytes](#ParseDecimalBytes)
--   [ParseBinaryBytes](#ParseBinaryBytes)
+- [Comma](#Comma)
 
 <div STYLE="page-break-after: always;"></div>
 
 ## Documentation
 
-### <span id="Comma">Comma</span>
 
+
+### <span id="Comma">Comma</span>
 <p>Add comma to number by every 3 numbers from right. ahead by symbol char.
 Param should be number or numberic string.</p>
 
 <b>Signature:</b>
 
 ```go
-func Comma(value interface{}, prefixSymbol string) string
+func Comma(v any, symbol string) string
 ```
-
 <b>Example:</b>
 
 ```go
@@ -52,7 +43,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/formatter"
+    "github.com/duke-git/lancet/v2/formatter"
 )
 
 func main() {
@@ -60,241 +51,3 @@ func main() {
     fmt.Println(formatter.Comma(12345.67, "¥")) // "¥12,345.67"
 }
 ```
-
-### <span id="Pretty">Pretty</span>
-
-<p>Pretty data to JSON string.</p>
-
-<b>Signature:</b>
-
-```go
-func Pretty(v interface{}) (string, error)
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/formatter"
-)
-
-func main() {
-    result1, _ := formatter.Pretty([]string{"a", "b", "c"})
-    result2, _ := formatter.Pretty(map[string]int{"a": 1})
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-
-    // Output:
-    // [
-    //     "a",
-    //     "b",
-    //     "c"
-    // ]
-    // {
-    //     "a": 1
-    // }
-}
-```
-
-### <span id="PrettyToWriter">PrettyToWriter</span>
-
-<p>Pretty encode data to writer.</p>
-
-<b>Signature:</b>
-
-```go
-func PrettyToWriter(v interface{}, out io.Writer) error
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/formatter"
-)
-
-func main() {
-    type User struct {
-        Name string `json:"name"`
-        Aage uint   `json:"age"`
-    }
-    user := User{Name: "King", Aage: 10000}
-
-    buf := &bytes.Buffer{}
-    err := formatter.PrettyToWriter(user, buf)
-
-    fmt.Println(buf)
-    fmt.Println(err)
-
-    // Output:
-    // {
-    //     "name": "King",
-    //     "age": 10000
-    // }
-    //
-    // <nil>
-}
-```
-
-### <span id="DecimalBytes">DecimalBytes</span>
-
-<p>Returns a human readable byte size under decimal standard (base 1000). The precision parameter specifies the number of digits after the decimal point, which is 4 for default.</p>
-
-<b>Signature:</b>
-
-```go
-func DecimalBytes(size float64, precision ...int) string
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/formatter"
-)
-
-func main() {
-    result1 := formatter.DecimalBytes(1000)
-    result2 := formatter.DecimalBytes(1024)
-    result3 := formatter.DecimalBytes(1234567)
-    result4 := formatter.DecimalBytes(1234567, 3)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-
-    // Output:
-    // 1KB
-    // 1.024KB
-    // 1.2346MB
-    // 1.235MB
-}
-```
-
-### <span id="BinaryBytes">BinaryBytes</span>
-
-<p>Returns a human readable byte size under binary standard (base 1024). The precision parameter specifies the number of digits after the decimal point, which is 4 for default.</p>
-
-<b>Signature:</b>
-
-```go
-func BinaryBytes(size float64, precision ...int) string
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/formatter"
-)
-
-func main() {
-    result1 := formatter.BinaryBytes(1024)
-    result2 := formatter.BinaryBytes(1024 * 1024)
-    result3 := formatter.BinaryBytes(1234567)
-    result4 := formatter.BinaryBytes(1234567, 2)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-
-    // Output:
-    // 1KiB
-    // 1MiB
-    // 1.1774MiB
-    // 1.18MiB
-}
-```
-
-### <span id="ParseDecimalBytes">ParseDecimalBytes</span>
-
-<p>Returns the human readable bytes size string into the amount it represents(base 1000).</p>
-
-<b>Signature:</b>
-
-```go
-func ParseDecimalBytes(size string) (uint64, error)
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/formatter"
-)
-
-func main() {
-    result1, _ := formatter.ParseDecimalBytes("12")
-    result2, _ := formatter.ParseDecimalBytes("12k")
-    result3, _ := formatter.ParseDecimalBytes("12 Kb")
-    result4, _ := formatter.ParseDecimalBytes("12.2 kb")
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-
-    // Output:
-    // 12
-    // 12000
-    // 12000
-    // 12200
-}
-```
-
-### <span id="ParseBinaryBytes">ParseBinaryBytes</span>
-
-<p>Returns the human readable bytes size string into the amount it represents(base 1024).</p>
-
-<b>Signature:</b>
-
-```go
-func ParseBinaryBytes(size string) (uint64, error)
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/formatter"
-)
-
-func main() {
-    result1, _ := formatter.ParseBinaryBytes("12")
-    result2, _ := formatter.ParseBinaryBytes("12ki")
-    result3, _ := formatter.ParseBinaryBytes("12 KiB")
-    result4, _ := formatter.ParseBinaryBytes("12.2 kib")
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-
-    // Output:
-    // 12
-    // 12288
-    // 12288
-    // 12492
-}
-```

docs/formatter_zh-CN.md

@@ -1,49 +1,40 @@
 # Formatter
-
-formatter 格式化器包含一些数据格式化处理方法。
+formatter格式化器包含一些数据格式化处理方法。
 
 <div STYLE="page-break-after: always;"></div>
 
 ## 源码:
 
-[https://github.com/duke-git/lancet/blob/v1/formatter/formatter.go](https://github.com/duke-git/lancet/blob/v1/formatter/formatter.go)
+- [https://github.com/duke-git/lancet/blob/main/formatter/formatter.go](https://github.com/duke-git/lancet/blob/main/formatter/formatter.go)
 
 <div STYLE="page-break-after: always;"></div>
 
 ## 用法:
-
 ```go
 import (
-    "github.com/duke-git/lancet/formatter"
+    "github.com/duke-git/lancet/v2/formatter"
 )
 ```
 
 <div STYLE="page-break-after: always;"></div>
 
 ## 目录
-
--   [Comma](#Comma)
--   [Pretty](#Pretty)
--   [PrettyToWriter](#PrettyToWriter)
--   [DecimalBytes](#DecimalBytes)
--   [BinaryBytes](#BinaryBytes)
--   [ParseDecimalBytes](#ParseDecimalBytes)
--   [ParseBinaryBytes](#ParseBinaryBytes)
+- [Comma](#Comma)
 
 <div STYLE="page-break-after: always;"></div>
 
 ## 文档
 
-### <span id="Comma">Comma</span>
 
+
+### <span id="Comma">Comma</span>
 <p>用逗号每隔3位分割数字/字符串，签名添加符号。参数必须是数字或者可以转为数字的字符串</p>
 
 <b>函数签名:</b>
 
 ```go
-func Comma(v interface{}, prefixSymbol string) string
+func Comma(v any, symbol string) string
 ```
-
 <b>例子:</b>
 
 ```go
@@ -51,7 +42,7 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/formatter"
+    "github.com/duke-git/lancet/v2/formatter"
 )
 
 func main() {
@@ -59,241 +50,3 @@ func main() {
     fmt.Println(formatter.Comma(12345.67, "¥")) // "¥12,345.67"
 }
 ```
-
-### <span id="Pretty">Pretty</span>
-
-<p>返回pretty JSON字符串.</p>
-
-<b>函数签名:</b>
-
-```go
-func Pretty(v interface{}) (string, error)
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/formatter"
-)
-
-func main() {
-    result1, _ := formatter.Pretty([]string{"a", "b", "c"})
-    result2, _ := formatter.Pretty(map[string]int{"a": 1})
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-
-    // Output:
-    // [
-    //     "a",
-    //     "b",
-    //     "c"
-    // ]
-    // {
-    //     "a": 1
-    // }
-}
-```
-
-### <span id="PrettyToWriter">PrettyToWriter</span>
-
-<p>Pretty encode数据到writer。</p>
-
-<b>函数签名:</b>
-
-```go
-func PrettyToWriter(v interface{}, out io.Writer) error
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/formatter"
-)
-
-func main() {
-    type User struct {
-        Name string `json:"name"`
-        Aage uint   `json:"age"`
-    }
-    user := User{Name: "King", Aage: 10000}
-
-    buf := &bytes.Buffer{}
-    err := formatter.PrettyToWriter(user, buf)
-
-    fmt.Println(buf)
-    fmt.Println(err)
-
-    // Output:
-    // {
-    //     "name": "King",
-    //     "age": 10000
-    // }
-    //
-    // <nil>
-}
-```
-
-### <span id="DecimalBytes">DecimalBytes</span>
-
-<p>返回十进制标准（以1000为基数）下的可读字节单位字符串。precision参数指定小数点后的位数，默认为4。</p>
-
-<b>函数签名:</b>
-
-```go
-func DecimalBytes(size float64, precision ...int) string
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/formatter"
-)
-
-func main() {
-    result1 := formatter.DecimalBytes(1000)
-    result2 := formatter.DecimalBytes(1024)
-    result3 := formatter.DecimalBytes(1234567)
-    result4 := formatter.DecimalBytes(1234567, 3)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-
-    // Output:
-    // 1KB
-    // 1.024KB
-    // 1.2346MB
-    // 1.235MB
-}
-```
-
-### <span id="BinaryBytes">BinaryBytes</span>
-
-<p>返回binary标准（以1024为基数）下的可读字节单位字符串。precision参数指定小数点后的位数，默认为4。</p>
-
-<b>函数签名:</b>
-
-```go
-func BinaryBytes(size float64, precision ...int) string
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/formatter"
-)
-
-func main() {
-    result1 := formatter.BinaryBytes(1024)
-    result2 := formatter.BinaryBytes(1024 * 1024)
-    result3 := formatter.BinaryBytes(1234567)
-    result4 := formatter.BinaryBytes(1234567, 2)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-
-    // Output:
-    // 1KiB
-    // 1MiB
-    // 1.1774MiB
-    // 1.18MiB
-}
-```
-
-### <span id="ParseDecimalBytes">ParseDecimalBytes</span>
-
-<p>将字节单位字符串转换成其所表示的字节数（以1000为基数）。</p>
-
-<b>函数签名:</b>
-
-```go
-func ParseDecimalBytes(size string) (uint64, error)
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/formatter"
-)
-
-func main() {
-    result1, _ := formatter.ParseDecimalBytes("12")
-    result2, _ := formatter.ParseDecimalBytes("12k")
-    result3, _ := formatter.ParseDecimalBytes("12 Kb")
-    result4, _ := formatter.ParseDecimalBytes("12.2 kb")
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-
-    // Output:
-    // 12
-    // 12000
-    // 12000
-    // 12200
-}
-```
-
-### <span id="ParseBinaryBytes">ParseBinaryBytes</span>
-
-<p>将字节单位字符串转换成其所表示的字节数（以1024为基数）。</p>
-
-<b>函数签名:</b>
-
-```go
-func ParseBinaryBytes(size string) (uint64, error)
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/formatter"
-)
-
-func main() {
-    result1, _ := formatter.ParseBinaryBytes("12")
-    result2, _ := formatter.ParseBinaryBytes("12ki")
-    result3, _ := formatter.ParseBinaryBytes("12 KiB")
-    result4, _ := formatter.ParseBinaryBytes("12.2 kib")
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-
-    // Output:
-    // 12
-    // 12288
-    // 12288
-    // 12492
-}
-```

docs/function.md

@@ -1,54 +1,47 @@
 # Function
-
 Package function can control the flow of function execution and support part of functional programming.
 
 <div STYLE="page-break-after: always;"></div>
 
 ## Source:
 
-[https://github.com/duke-git/lancet/blob/v1/function/function.go](https://github.com/duke-git/lancet/blob/v1/function/function.go)
-[https://github.com/duke-git/lancet/blob/v1/function/watcher.go](https://github.com/duke-git/lancet/blob/v1/function/watcher.go)
+- [https://github.com/duke-git/lancet/blob/main/function/function.go](https://github.com/duke-git/lancet/blob/main/function/function.go)
+- [https://github.com/duke-git/lancet/blob/main/function/watcher.go](https://github.com/duke-git/lancet/blob/main/function/watcher.go)
 
 <div STYLE="page-break-after: always;"></div>
 
 ## Usage:
-
 ```go
 import (
-    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/v2/function"
 )
 ```
 
 <div STYLE="page-break-after: always;"></div>
 
 ## Index
-
--   [After](#After)
--   [Before](#Before)
--   [Curry](#Curry)
--   [Compose](#Compose)
--   [Debounce](#Debounce)
--   [Debounced<sup>deprecated</sup>](#Debounced)
--   [Throttle](#Throttle)
--   [Delay](#Delay)
--   [Pipeline](#Pipeline)
--   [Schedule](#Schedule)
--   [Watcher](#Watcher)
+- [After](#After)
+- [Before](#Before)
+- [Curry](#Curry)
+- [Compose](#Compose)
+- [Debounced](#Debounced)
+- [Delay](#Delay)
+- [Watcher](#Watcher)
 
 <div STYLE="page-break-after: always;"></div>
 
 ## Documentation
 
-### <span id="After">After</span>
 
+
+### <span id="After">After</span>
 <p>Creates a function that invokes given func once it's called n or more times.</p>
 
 <b>Signature:</b>
 
 ```go
-func After(n int, fn interface{}) func(args ...interface{}) []reflect.Value
+func After(n int, fn any) func(args ...any) []reflect.Value
 ```
-
 <b>Example:</b>
 
 ```go
@@ -56,35 +49,37 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/v2/function"
 )
 
 func main() {
-    arr := []string{"a", "b"}
-    f := function.After(len(arr), func(i int) int {
-        fmt.Println("last print")
-        return i
-    })
+	arr := []string{"a", "b"}
+	f := function.After(len(arr), func(i int) int {
+		fmt.Println("last print")
+		return i
+	})
 
-    type cb func(args ...interface{}) []reflect.Value
-    print := func(i int, s string, fn cb) {
-        fmt.Printf("arr[%d] is %s \n", i, s)
-        fn(i)
-    }
+	type cb func(args ...any) []reflect.Value
+	print := func(i int, s string, fn cb) {
+		fmt.Printf("arr[%d] is %s \n", i, s)
+		fn(i)
+	}
 
-    fmt.Println("arr is", arr)
-    for i := 0; i < len(arr); i++ {
-        print(i, arr[i], f)
-    }
+	fmt.Println("arr is", arr)
+	for i := 0; i < len(arr); i++ {
+		print(i, arr[i], f)
+	}
 
     //output:
     // arr is [a b]
-    // arr[0] is a
-    // arr[1] is b
+    // arr[0] is a 
+    // arr[1] is b 
     // last print
 }
 ```
 
+
+
 ### <span id="Before">Before</span>
 
 <p>creates a function that invokes func once it's called less than n times.</p>
@@ -92,9 +87,8 @@ func main() {
 <b>Signature:</b>
 
 ```go
-func Before(n int, fn interface{}) func(args ...interface{}) []reflect.Value
+func Before(n int, fn any) func(args ...any) []reflect.Value
 ```
-
 <b>Example:</b>
 
 ```go
@@ -102,34 +96,34 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/function"
-    "github.com/duke-git/lancet/internal"
+    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/v2/internal"
 )
 
 func main() {
-    assert := internal.NewAssert(t, "TestBefore")
+	arr := []string{"a", "b", "c", "d", "e"}
+	f := function.Before(3, func(i int) int {
+		return i
+	})
 
-    arr := []string{"a", "b", "c", "d", "e"}
-    f := function.Before(3, func(i int) int {
-        return i
-    })
+	var res []int64
+	type cb func(args ...any) []reflect.Value
+	appendStr := func(i int, s string, fn cb) {
+		v := fn(i)
+		res = append(res, v[0].Int())
+	}
 
-    var res []int64
-    type cb func(args ...interface{}) []reflect.Value
-    appendStr := func(i int, s string, fn cb) {
-        v := fn(i)
-        res = append(res, v[0].Int())
-    }
+	for i := 0; i < len(arr); i++ {
+		appendStr(i, arr[i], f)
+	}
 
-    for i := 0; i < len(arr); i++ {
-        appendStr(i, arr[i], f)
-    }
-
-    expected := []int64{0, 1, 2, 2, 2}
-    assert.Equal(expected, res)
+	expected := []int64{0, 1, 2, 2, 2}
+	fmt.Println(res) // 0, 1, 2, 2, 2
 }
 ```
 
+
+
 ### <span id="Curry">Curry</span>
 
 <p>Make a curry function.</p>
@@ -137,10 +131,9 @@ func main() {
 <b>Signature:</b>
 
 ```go
-type Fn func(...interface{}) interface{}
-func (f Fn) Curry(i interface{}) func(...interface{}) interface{}
+type Fn func(...any) any
+func (f Fn) Curry(i any) func(...any) any
 ```
-
 <b>Example:</b>
 
 ```go
@@ -148,22 +141,24 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/v2/function"
 )
 
 func main() {
     add := func(a, b int) int {
-        return a + b
-    }
-    var addCurry function.Fn = func(values ...interface{}) interface{} {
-        return add(values[0].(int), values[1].(int))
-    }
-    add1 := addCurry.Curry(1)
-    result := add1(2)
+		return a + b
+	}
+	var addCurry function.Fn = func(values ...any) any {
+		return add(values[0].(int), values[1].(int))
+	}
+	add1 := addCurry.Curry(1)
+	result := add1(2)
     fmt.Println(result) //3
 }
 ```
 
+
+
 ### <span id="Compose">Compose</span>
 
 <p>Compose the function list from right to left, then return the composed function.</p>
@@ -171,9 +166,8 @@ func main() {
 <b>Signature:</b>
 
 ```go
-func Compose(fnList ...func(...interface{}) interface{}) func(...interface{}) interface{}
+func Compose(fnList ...func(...any) any) func(...any) any
 ```
-
 <b>Example:</b>
 
 ```go
@@ -181,34 +175,35 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/v2/function"
 )
 
 func main() {
-    add1 := func(v ...interface{}) interface{} {
-        return v[0].(int) + 1
-    }
-    add2 := func(v ...interface{}) interface{} {
-        return v[0].(int) + 2
-    }
+    add1 := func(v ...any) any {
+		return v[0].(int) + 1
+	}
+    add2 := func(v ...any) any {
+		return v[0].(int) + 2
+	}
 
     add3 := function.Compose(add1, add2)
-    result := add3(1)
+	result := add3(1)
 
     fmt.Println(result) //4
 }
 ```
 
+
+
 ### <span id="Debounced">Debounced</span>
 
-<p>Creates a debounced function that delays invoking fn until after wait duration have elapsed since the last time the debounced function was invoked. This function is deprecated. use Debounce instead.</p>
+<p>Creates a debounced function that delays invoking fn until after wait duration have elapsed since the last time the debounced function was invoked.</p>
 
 <b>Signature:</b>
 
 ```go
 func Debounced(fn func(), duration time.Duration) func()
 ```
-
 <b>Example:</b>
 
 ```go
@@ -216,76 +211,31 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/v2/function"
 )
 
 func main() {
     count := 0
-    add := func() {
-        count++
-    }
+	add := func() {
+		count++
+	}
 
-    debouncedAdd := function.Debounced(add, 50*time.Microsecond)
-    function.debouncedAdd()
-    function.debouncedAdd()
-    function.debouncedAdd()
-    function.debouncedAdd()
+	debouncedAdd := function.Debounced(add, 50*time.Microsecond)
+	function.debouncedAdd()
+	function.debouncedAdd()
+	function.debouncedAdd()
+	function.debouncedAdd()
 
-    time.Sleep(100 * time.Millisecond)
-    fmt.Println(count) //1
+	time.Sleep(100 * time.Millisecond)
+	fmt.Println(count) //1
 
-    function.debouncedAdd()
-    time.Sleep(100 * time.Millisecond)
-    fmt.Println(count) //2
+	function.debouncedAdd()
+	time.Sleep(100 * time.Millisecond)
+	fmt.Println(count) //2
 }
 ```
 
-### <span id="Debounce">Debounce</span>
 
-<p>Creates a debounced version of the provided function. The debounced function will only invoke the original function after the specified delay has passed since the last time it was invoked. It also supports canceling the debounce.</p>
-
-<b>Signature:</b>
-
-```go
-func Debounce(fn func(), delay time.Duration) (debouncedFn func(), cancelFn func())
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/function"
-)
-
-func main() {
-    callCount := 0
-    fn := func() {
-        callCount++
-    }
-
-    debouncedFn, _ := function.Debounce(fn, 500*time.Millisecond)
-
-    for i := 0; i < 10; i++ {
-        debouncedFn()
-        time.Sleep(50 * time.Millisecond)
-    }
-
-    time.Sleep(1 * time.Second)
-    fmt.Println(callCount)
-
-    debouncedFn()
-
-    time.Sleep(1 * time.Second)
-    fmt.Println(callCount)
-
-    // Output:
-    // 1
-    // 2
-}
-```
 
 ### <span id="Delay">Delay</span>
 
@@ -294,9 +244,8 @@ func main() {
 <b>Signature:</b>
 
 ```go
-func Delay(delay time.Duration, fn interface{}, args ...interface{})
+func Delay(delay time.Duration, fn any, args ...any)
 ```
-
 <b>Example:</b>
 
 ```go
@@ -304,58 +253,18 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/v2/function"
 )
 
 func main() {
-    var print = func(s string) {
-        fmt.Println(count) //test delay
-    }
-    function.Delay(2*time.Second, print, "test delay")
+	var print = func(s string) {
+		fmt.Println(count) //test delay
+	}
+	function.Delay(2*time.Second, print, "test delay")
 }
 ```
 
-### <span id="Throttle">Throttle</span>
 
-<p>Creates a throttled version of the provided function. The returned function guarantees that it will only be invoked at most once per interval.</p>
-
-<b>Signature:</b>
-
-```go
-func Throttle(fn func(), interval time.Duration) func()
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/function"
-)
-
-func main() {
-    callCount := 0
-
-    fn := func() {
-        callCount++
-    }
-
-    throttledFn := function.Throttle(fn, 1*time.Second)
-
-    for i := 0; i < 5; i++ {
-        throttledFn()
-    }
-
-    time.Sleep(1 * time.Second)
-
-    fmt.Println(callCount)
-
-    // Output:
-    // 1
-}
-```
 
 ### <span id="Schedule">Schedule</span>
 
@@ -364,9 +273,8 @@ func main() {
 <b>Signature:</b>
 
 ```go
-func Schedule(d time.Duration, fn interface{}, args ...interface{}) chan bool
+func Schedule(d time.Duration, fn any, args ...any) chan bool
 ```
-
 <b>Example:</b>
 
 ```go
@@ -374,65 +282,24 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/v2/function"
 )
 
 func main() {
     var res []string
-    appendStr := func(s string) {
-        res = append(res, s)
-    }
+	appendStr := func(s string) {
+		res = append(res, s)
+	}
 
-    stop := function.Schedule(1*time.Second, appendStr, "*")
-    time.Sleep(5 * time.Second)
-    close(stop)
+	stop := function.Schedule(1*time.Second, appendStr, "*")
+	time.Sleep(5 * time.Second)
+	close(stop)
 
-    fmt.Println(res) //[* * * * *]
+	fmt.Println(res) //[* * * * *]
 }
 ```
 
-### <span id="Pipeline">Pipeline</span>
 
-<p>Pipeline takes a list of functions and returns a function whose param will be passed into
-the functions one by one.</p>
-
-<b>Signature:</b>
-
-```go
-func Pipeline(funcs ...func(interface{}) interface{}) func(interface{}) interface{}
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/function"
-)
-
-func main() {
-    addOne := func(x interface{}) interface{} {
-        return x.(int) + 1
-    }
-    double := func(x interface{}) interface{} {
-        return 2 * x.(int)
-    }
-    square := func(x interface{}) interface{} {
-        return x.(int) * x.(int)
-    }
-
-    f := function.Pipeline(addOne, double, square)
-
-    result := fn(2)
-
-    fmt.Println(result)
-
-    // Output:
-    // 36
-}
-```
 
 ### <span id="Watcher">Watcher</span>
 
@@ -442,16 +309,15 @@ func main() {
 
 ```go
 type Watcher struct {
-    startTime int64
-    stopTime  int64
-    excuting  bool
+	startTime int64
+	stopTime  int64
+	excuting  bool
 }
 func (w *Watcher) Start() //start the watcher
 func (w *Watcher) Stop() //stop the watcher
 func (w *Watcher) Reset() //reset the watcher
 func (w *Watcher) GetElapsedTime() time.Duration //get the elapsed time of function execution
 ```
-
 <b>Example:</b>
 
 ```go
@@ -459,35 +325,38 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/v2/function"
 )
 
 func main() {
     w := &function.Watcher{}
-    w.Start()
+	w.Start()
 
-    longRunningTask()
+	longRunningTask()
 
-    fmt.Println(w.excuting) //true
+	fmt.Println(w.excuting) //true
 
-    w.Stop()
+	w.Stop()
 
-    eapsedTime := w.GetElapsedTime().Milliseconds()
-    fmt.Println(eapsedTime)
+	eapsedTime := w.GetElapsedTime().Milliseconds()
+	fmt.Println(eapsedTime)
 
-    w.Reset()
+	w.Reset()
 
-    fmt.Println(w.excuting) //false
+	fmt.Println(w.excuting) //false
 
-    fmt.Println(w.startTime) //0
-    fmt.Println(w.stopTime) //0
+	fmt.Println(w.startTime) //0
+	fmt.Println(w.stopTime) //0
 }
 
 func longRunningTask() {
-    var slice []int64
-    for i := 0; i < 10000000; i++ {
-        slice = append(slice, int64(i))
-    }
+	var slice []int64
+	for i := 0; i < 10000000; i++ {
+		slice = append(slice, int64(i))
+	}
 }
 
 ```
+
+
+

docs/function_zh-CN.md

@@ -1,54 +1,47 @@
 # Function
-
-function 函数包控制函数执行流程，包含部分函数式编程。
+function函数包控制函数执行流程，包含部分函数式编程。
 
 <div STYLE="page-break-after: always;"></div>
 
 ## 源码:
 
-[https://github.com/duke-git/lancet/blob/v1/function/function.go](https://github.com/duke-git/lancet/blob/v1/function/function.go)
-[https://github.com/duke-git/lancet/blob/v1/function/watcher.go](https://github.com/duke-git/lancet/blob/v1/function/watcher.go)
+- [https://github.com/duke-git/lancet/blob/main/function/function.go](https://github.com/duke-git/lancet/blob/main/function/function.go)
+- [https://github.com/duke-git/lancet/blob/main/function/watcher.go](https://github.com/duke-git/lancet/blob/main/function/watcher.go)
 
 <div STYLE="page-break-after: always;"></div>
 
 ## 用法:
-
 ```go
 import (
-    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/v2/function"
 )
 ```
 
 <div STYLE="page-break-after: always;"></div>
 
 ## 目录
-
--   [After](#After)
--   [Before](#Before)
--   [Curry](#Curry)
--   [Compose](#Compose)
--   [Debounce](#Debounce)
--   [Debounced<sup>deprecated</sup>](#Debounced)
--   [Throttle](#Throttle)
--   [Delay](#Delay)
--   [Pipeline](#Pipeline)
--   [Schedule](#Schedule)
--   [Watcher](#Watcher)
+- [After](#After)
+- [Before](#Before)
+- [Curry](#Curry)
+- [Compose](#Compose)
+- [Debounced](#Debounced)
+- [Delay](#Delay)
+- [Watcher](#Watcher)
 
 <div STYLE="page-break-after: always;"></div>
 
 ## 文档
 
-### <span id="After">After</span>
 
+
+### <span id="After">After</span>
 <p>创建一个函数，当他被调用n或更多次之后将马上触发fn</p>
 
 <b>函数签名:</b>
 
 ```go
-func After(n int, fn interface{}) func(args ...interface{}) []reflect.Value
+func After(n int, fn any) func(args ...any) []reflect.Value
 ```
-
 <b>例子:</b>
 
 ```go
@@ -56,35 +49,37 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/v2/function"
 )
 
 func main() {
-    arr := []string{"a", "b"}
-    f := function.After(len(arr), func(i int) int {
-        fmt.Println("last print")
-        return i
-    })
+	arr := []string{"a", "b"}
+	f := function.After(len(arr), func(i int) int {
+		fmt.Println("last print")
+		return i
+	})
 
-    type cb func(args ...interface{}) []reflect.Value
-    print := func(i int, s string, fn cb) {
-        fmt.Printf("arr[%d] is %s \n", i, s)
-        fn(i)
-    }
+	type cb func(args ...any) []reflect.Value
+	print := func(i int, s string, fn cb) {
+		fmt.Printf("arr[%d] is %s \n", i, s)
+		fn(i)
+	}
 
-    fmt.Println("arr is", arr)
-    for i := 0; i < len(arr); i++ {
-        print(i, arr[i], f)
-    }
+	fmt.Println("arr is", arr)
+	for i := 0; i < len(arr); i++ {
+		print(i, arr[i], f)
+	}
 
     //output:
     // arr is [a b]
-    // arr[0] is a
-    // arr[1] is b
+    // arr[0] is a 
+    // arr[1] is b 
     // last print
 }
 ```
 
+
+
 ### <span id="Before">Before</span>
 
 <p>创建一个函数，调用次数不超过n次，之后再调用这个函数，将返回一次最后调用fn的结果</p>
@@ -92,9 +87,8 @@ func main() {
 <b>函数签名:</b>
 
 ```go
-func Before(n int, fn interface{}) func(args ...interface{}) []reflect.Value
+func Before(n int, fn any) func(args ...any) []reflect.Value
 ```
-
 <b>例子:</b>
 
 ```go
@@ -102,34 +96,33 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/function"
-    "github.com/duke-git/lancet/internal"
+    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/v2/internal"
 )
 
 func main() {
-    assert := internal.NewAssert(t, "TestBefore")
+	arr := []string{"a", "b", "c", "d", "e"}
+	f := function.Before(3, func(i int) int {
+		return i
+	})
 
-    arr := []string{"a", "b", "c", "d", "e"}
-    f := function.Before(3, func(i int) int {
-        return i
-    })
+	var res []int64
+	type cb func(args ...any) []reflect.Value
+	appendStr := func(i int, s string, fn cb) {
+		v := fn(i)
+		res = append(res, v[0].Int())
+	}
 
-    var res []int64
-    type cb func(args ...interface{}) []reflect.Value
-    appendStr := func(i int, s string, fn cb) {
-        v := fn(i)
-        res = append(res, v[0].Int())
-    }
+	for i := 0; i < len(arr); i++ {
+		appendStr(i, arr[i], f)
+	}
 
-    for i := 0; i < len(arr); i++ {
-        appendStr(i, arr[i], f)
-    }
-
-    expected := []int64{0, 1, 2, 2, 2}
-    assert.Equal(expected, res)
+	fmt.Println(res) // 0, 1, 2, 2, 2
 }
 ```
 
+
+
 ### <span id="Curry">Curry</span>
 
 <p>创建一个柯里化的函数</p>
@@ -137,10 +130,9 @@ func main() {
 <b>函数签名:</b>
 
 ```go
-type Fn func(...interface{}) interface{}
-func (f Fn) Curry(i interface{}) func(...interface{}) interface{}
+type Fn func(...any) any
+func (f Fn) Curry(i any) func(...any) any
 ```
-
 <b>例子:</b>
 
 ```go
@@ -148,22 +140,24 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/v2/function"
 )
 
 func main() {
-    add := func(a, b int) int {
-        return a + b
-    }
-    var addCurry function.Fn = func(values ...interface{}) interface{} {
-        return add(values[0].(int), values[1].(int))
-    }
-    add1 := addCurry.Curry(1)
-    result := add1(2)
-    fmt.Println(result) //3
+	add := func(a, b int) int {
+		return a + b
+	}
+	var addCurry function.Fn = func(values ...any) any {
+		return add(values[0].(int), values[1].(int))
+	}
+	add1 := addCurry.Curry(1)
+	result := add1(2)
+	fmt.Println(result) //3
 }
 ```
 
+
+
 ### <span id="Compose">Compose</span>
 
 <p>从右至左组合函数列表fnList， 返回组合后的函数</p>
@@ -171,9 +165,8 @@ func main() {
 <b>函数签名:</b>
 
 ```go
-func Compose(fnList ...func(...interface{}) interface{}) func(...interface{}) interface{}
+func Compose(fnList ...func(...any) any) func(...any) any
 ```
-
 <b>例子:</b>
 
 ```go
@@ -181,70 +174,25 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/v2/function"
 )
 
 func main() {
-    add1 := func(v ...interface{}) interface{} {
-        return v[0].(int) + 1
-    }
-    add2 := func(v ...interface{}) interface{} {
-        return v[0].(int) + 2
-    }
+	add1 := func(v ...any) any {
+		return v[0].(int) + 1
+	}
+	add2 := func(v ...any) any {
+		return v[0].(int) + 2
+	}
 
-    add3 := function.Compose(add1, add2)
-    result := add3(1)
+	add3 := function.Compose(add1, add2)
+	result := add3(1)
 
-    fmt.Println(result) //4
+	fmt.Println(result) //4
 }
 ```
 
-### <span id="Debounce">Debounce</span>
 
-<p>创建一个函数的去抖动版本。该去抖动函数仅在上次调用后的指定延迟时间过去之后才会调用原始函数。支持取消去抖动。</p>
-
-<b>函数签名:</b>
-
-```go
-func Debounce(fn func(), delay time.Duration) (debouncedFn func(), cancelFn func())
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/function"
-)
-
-func main() {
-    callCount := 0
-    fn := func() {
-        callCount++
-    }
-
-    debouncedFn, _ := function.Debounce(fn, 500*time.Millisecond)
-
-    for i := 0; i < 10; i++ {
-        debouncedFn()
-        time.Sleep(50 * time.Millisecond)
-    }
-
-    time.Sleep(1 * time.Second)
-    fmt.Println(callCount)
-
-    debouncedFn()
-
-    time.Sleep(1 * time.Second)
-    fmt.Println(callCount)
-
-    // Output:
-    // 1
-    // 2
-}
-```
 
 ### <span id="Debounced">Debounced</span>
 
@@ -255,7 +203,6 @@ func main() {
 ```go
 func Debounced(fn func(), duration time.Duration) func()
 ```
-
 <b>例子:</b>
 
 ```go
@@ -263,71 +210,31 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/v2/function"
 )
 
 func main() {
-    count := 0
-    add := func() {
-        count++
-    }
+	count := 0
+	add := func() {
+		count++
+	}
 
-    debouncedAdd := function.Debounced(add, 50*time.Microsecond)
-    function.debouncedAdd()
-    function.debouncedAdd()
-    function.debouncedAdd()
-    function.debouncedAdd()
+	debouncedAdd := function.Debounced(add, 50*time.Microsecond)
+	function.debouncedAdd()
+	function.debouncedAdd()
+	function.debouncedAdd()
+	function.debouncedAdd()
 
-    time.Sleep(100 * time.Millisecond)
-    fmt.Println(count) //1
+	time.Sleep(100 * time.Millisecond)
+	fmt.Println(count) //1
 
-    function.debouncedAdd()
-    time.Sleep(100 * time.Millisecond)
-    fmt.Println(count) //2
+	function.debouncedAdd()
+	time.Sleep(100 * time.Millisecond)
+	fmt.Println(count) //2
 }
 ```
 
-### <span id="Throttle">Throttle</span>
 
-<p>创建一个函数的节流版本。返回的函数保证在每个时间间隔内最多只会被调用一次。</p>
-
-<b>函数签名:</b>
-
-```go
-func Throttle(fn func(), interval time.Duration) func()
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/function"
-)
-
-func main() {
-    callCount := 0
-
-    fn := func() {
-        callCount++
-    }
-
-    throttledFn := function.Throttle(fn, 1*time.Second)
-
-    for i := 0; i < 5; i++ {
-        throttledFn()
-    }
-
-    time.Sleep(1 * time.Second)
-
-    fmt.Println(callCount)
-
-    // Output:
-    // 1
-}
-```
 
 ### <span id="Delay">Delay</span>
 
@@ -336,9 +243,8 @@ func main() {
 <b>函数签名:</b>
 
 ```go
-func Delay(delay time.Duration, fn interface{}, args ...interface{})
+func Delay(delay time.Duration, fn any, args ...any)
 ```
-
 <b>例子:</b>
 
 ```go
@@ -346,17 +252,19 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/v2/function"
 )
 
 func main() {
-    var print = func(s string) {
-        fmt.Println(count) //test delay
-    }
-    function.Delay(2*time.Second, print, "test delay")
+	var print = func(s string) {
+		fmt.Println(count) //test delay
+	}
+	function.Delay(2*time.Second, print, "test delay")
 }
 ```
 
+
+
 ### <span id="Schedule">Schedule</span>
 
 <p>每次持续时间调用函数，直到关闭返回的 bool chan</p>
@@ -364,9 +272,8 @@ func main() {
 <b>函数签名:</b>
 
 ```go
-func Schedule(d time.Duration, fn interface{}, args ...interface{}) chan bool
+func Schedule(d time.Duration, fn any, args ...any) chan bool
 ```
-
 <b>例子:</b>
 
 ```go
@@ -374,64 +281,24 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/v2/function"
 )
 
 func main() {
     var res []string
-    appendStr := func(s string) {
-        res = append(res, s)
-    }
+	appendStr := func(s string) {
+		res = append(res, s)
+	}
 
-    stop := function.Schedule(1*time.Second, appendStr, "*")
-    time.Sleep(5 * time.Second)
-    close(stop)
+	stop := function.Schedule(1*time.Second, appendStr, "*")
+	time.Sleep(5 * time.Second)
+	close(stop)
 
-    fmt.Println(res) //[* * * * *]
+	fmt.Println(res) //[* * * * *]
 }
 ```
 
-### <span id="Pipeline">Pipeline</span>
 
-<p>管道执行多个函数</p>
-
-<b>函数签名:</b>
-
-```go
-func Pipeline(funcs ...func(interface{}) interface{}) func(interface{}) interface{}
-```
-
-<b>例子:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/function"
-)
-
-func main() {
-    addOne := func(x interface{}) interface{} {
-        return x.(int) + 1
-    }
-    double := func(x interface{}) interface{} {
-        return 2 * x.(int)
-    }
-    square := func(x interface{}) interface{} {
-        return x.(int) * x.(int)
-    }
-
-    f := function.Pipeline(addOne, double, square)
-
-    result := fn(2)
-
-    fmt.Println(result)
-
-    // Output:
-    // 36
-}
-```
 
 ### <span id="Watcher">Watcher</span>
 
@@ -441,16 +308,15 @@ func main() {
 
 ```go
 type Watcher struct {
-    startTime int64
-    stopTime  int64
-    excuting  bool
+	startTime int64
+	stopTime  int64
+	excuting  bool
 }
 func (w *Watcher) Start() //start the watcher
 func (w *Watcher) Stop() //stop the watcher
 func (w *Watcher) Reset() //reset the watcher
 func (w *Watcher) GetElapsedTime() time.Duration //get the elapsed time of function execution
 ```
-
 <b>例子:</b>
 
 ```go
@@ -458,35 +324,38 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/v2/function"
 )
 
 func main() {
     w := &function.Watcher{}
-    w.Start()
+	w.Start()
 
-    longRunningTask()
+	longRunningTask()
 
-    fmt.Println(w.excuting) //true
+	fmt.Println(w.excuting) //true
 
-    w.Stop()
+	w.Stop()
 
-    eapsedTime := w.GetElapsedTime().Milliseconds()
-    fmt.Println(eapsedTime)
+	eapsedTime := w.GetElapsedTime().Milliseconds()
+	fmt.Println(eapsedTime)
 
-    w.Reset()
+	w.Reset()
 
-    fmt.Println(w.excuting) //false
+	fmt.Println(w.excuting) //false
 
-    fmt.Println(w.startTime) //0
-    fmt.Println(w.stopTime) //0
+	fmt.Println(w.startTime) //0
+	fmt.Println(w.stopTime) //0
 }
 
 func longRunningTask() {
-    var slice []int64
-    for i := 0; i < 10000000; i++ {
-        slice = append(slice, int64(i))
-    }
+	var slice []int64
+	for i := 0; i < 10000000; i++ {
+		slice = append(slice, int64(i))
+	}
 }
 
 ```
+
+
+

docs/maputil.md

@@ -0,0 +1,352 @@
+# Maputil
+Package maputil includes some functions to manipulate map.
+
+<div STYLE="page-break-after: always;"></div>
+
+## Source:
+
+- [https://github.com/duke-git/lancet/blob/main/maputil/map.go](https://github.com/duke-git/lancet/blob/main/maputil/map.go)
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## Example:
+```go
+import (
+    "github.com/duke-git/lancet/v2/maputil"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## Index
+- [ForEach](#ForEach)
+- [Filter](#Filter)
+- [Intersect](#Intersect)
+- [Keys](#Keys)
+- [Merge](#Merge)
+- [Minus](#Minus)
+- [Values](#Values)
+- [IsDisjoint](#IsDisjoint)
+
+<div STYLE="page-break-after: always;"></div>
+
+## Documentation
+
+
+
+### <span id="ForEach">ForEach</span>
+<p>Executes iteratee funcation for every key and value pair in map.</p>
+
+<b>Signature:</b>
+
+```go
+func ForEach[K comparable, V any](m map[K]V, iteratee func(key K, value V))
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/maputil"
+)
+
+func main() {
+	m := map[string]int{
+		"a": 1,
+		"b": 2,
+		"c": 3,
+		"d": 4,
+	}
+
+	var sum int
+
+	maputil.ForEach(m, func(_ string, value int) {
+		sum += value
+	})
+	fmt.Println(sum) // 10
+}
+```
+
+
+
+
+### <span id="Filter">Filter</span>
+<p>Iterates over map, return a new map contains all key and value pairs pass the predicate function.</p>
+
+<b>Signature:</b>
+
+```go
+func Filter[K comparable, V any](m map[K]V, predicate func(key K, value V) bool) map[K]V
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/maputil"
+)
+
+func main() {
+	m := map[string]int{
+		"a": 1,
+		"b": 2,
+		"c": 3,
+		"d": 4,
+		"e": 5,
+	}
+	isEven := func(_ string, value int) bool {
+		return value%2 == 0
+	}
+
+	maputil.Filter(m, func(_ string, value int) {
+		sum += value
+	})
+	res := maputil.Filter(m, isEven)
+	fmt.Println(res) // map[string]int{"b": 2, "d": 4,}
+}
+```
+
+
+
+
+### <span id="Intersect">Intersect</span>
+<p>Iterates over maps, return a new map of key and value pairs in all given maps.</p>
+
+<b>Signature:</b>
+
+```go
+func Intersect[K comparable, V any](maps ...map[K]V) map[K]V
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/maputil"
+)
+
+func main() {
+	m1 := map[string]int{
+		"a": 1,
+		"b": 2,
+		"c": 3,
+	}
+
+	m2 := map[string]int{
+		"a": 1,
+		"b": 2,
+		"c": 6,
+		"d": 7,
+	}
+
+	m3 := map[string]int{
+		"a": 1,
+		"b": 9,
+		"e": 9,
+	}
+
+	fmt.Println(maputil.Intersect(m1)) // map[string]int{"a": 1, "b": 2, "c": 3}
+
+	fmt.Println(maputil.Intersect(m1, m2)) // map[string]int{"a": 1, "b": 2}
+
+	fmt.Println(maputil.Intersect(m1, m2, m3)) // map[string]int{"a": 1}
+}
+```
+
+
+
+
+### <span id="Keys">Keys</span>
+<p>Returns a slice of the map's keys.</p>
+
+<b>Signature:</b>
+
+```go
+func Keys[K comparable, V any](m map[K]V) []K
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/maputil"
+)
+
+func main() {
+	m := map[int]string{
+		1: "a",
+		2: "a",
+		3: "b",
+		4: "c",
+		5: "d",
+	}
+
+	keys := maputil.Keys(m)
+	sort.Ints(keys)
+	fmt.Println(keys) // []int{1, 2, 3, 4, 5}
+}
+```
+
+
+
+
+### <span id="Merge">Merge</span>
+<p>Merge maps, next key will overwrite previous key.</p>
+
+<b>Signature:</b>
+
+```go
+func Merge[K comparable, V any](maps ...map[K]V) map[K]V
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/maputil"
+)
+
+func main() {
+	m1 := map[int]string{
+		1: "a",
+		2: "b",
+	}
+	m2 := map[int]string{
+		1: "1",
+		3: "2",
+	}
+	fmt.Println(maputil.Merge(m1, m2)) // map[int]string{1:"1", 2:"b", 3:"2",}
+}
+```
+
+
+
+
+### <span id="Minus">Minus</span>
+<p>Creates an map of whose key in mapA but not in mapB.</p>
+
+<b>Signature:</b>
+
+```go
+func Minus[K comparable, V any](mapA, mapB map[K]V) map[K]V
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/maputil"
+)
+
+func main() {
+	m1 := map[string]int{
+		"a": 1,
+		"b": 2,
+		"c": 3,
+	}
+
+	m2 := map[string]int{
+		"a": 11,
+		"b": 22,
+		"d": 33,
+	}
+
+	fmt.Println(maputil.Minus(m1, m2)) //map[string]int{"c": 3}
+}
+```
+
+
+
+### <span id="Values">Values</span>
+<p>Returns a slice of the map's values.</p>
+
+<b>Signature:</b>
+
+```go
+func Values[K comparable, V any](m map[K]V) []V
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/maputil"
+)
+
+func main() {
+	m := map[int]string{
+		1: "a",
+		2: "a",
+		3: "b",
+		4: "c",
+		5: "d",
+	}
+
+	values := maputil.Values(m)
+	sort.Strings(values)
+
+	fmt.Println(values) // []string{"a", "a", "b", "c", "d"}
+}
+```
+
+### <span id="IsDisjoint">IsDisjoint</span>
+<p>Checks two maps are disjoint if they have no keys in common</p>
+
+<b>Signature:</b>
+
+```go
+func IsDisjoint[K comparable, V any](mapA, mapB map[K]V) bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/maputil"
+)
+
+func main() {
+	m1 := map[int]string{
+		1: "a",
+		2: "a",
+		3: "b",
+		4: "c",
+		5: "d",
+	}
+
+	m2 := map[int]string{
+		1: "a",
+		2: "a",
+		3: "b",
+		4: "c",
+		5: "d",
+	}
+
+	m3 := map[int]string{
+		6: "a",
+	}
+
+	ok := maputil.IsDisjoint(m2, m1)
+	fmt.Println(ok) // false
+
+	ok = maputil.IsDisjoint(m2, m3)
+	fmt.Println(ok) // true
+}
+```

docs/maputil_zh-CN.md

@@ -0,0 +1,352 @@
+# Maputil
+maputil包包括一些操作map的函数。
+
+<div STYLE="page-break-after: always;"></div>
+
+## 源码:
+
+- [https://github.com/duke-git/lancet/blob/main/maputil/map.go](https://github.com/duke-git/lancet/blob/main/maputil/map.go)
+
+
+<div STYLE="page-break-after: always;"></div>
+
+## 用法:
+```go
+import (
+    "github.com/duke-git/lancet/v2/maputil"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## 目录:
+- [ForEach](#ForEach)
+- [Filter](#Filter)
+- [Intersect](#Intersect)
+- [Keys](#Keys)
+- [Merge](#Merge)
+- [Minus](#Minus)
+- [Values](#Values)
+- [IsDisjoint](#IsDisjoint)
+
+<div STYLE="page-break-after: always;"></div>
+
+## API文档:
+
+
+
+### <span id="ForEach">ForEach</span>
+<p>对map中的每对key和value执行iteratee函数</p>
+
+<b>函数签名:</b>
+
+```go
+func ForEach[K comparable, V any](m map[K]V, iteratee func(key K, value V))
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/maputil"
+)
+
+func main() {
+	m := map[string]int{
+		"a": 1,
+		"b": 2,
+		"c": 3,
+		"d": 4,
+	}
+
+	var sum int
+
+	maputil.ForEach(m, func(_ string, value int) {
+		sum += value
+	})
+	fmt.Println(sum) // 10
+}
+```
+
+
+
+
+### <span id="Filter">Filter</span>
+<p>迭代map中的每对key和value, 返回符合predicate函数的key, value</p>
+
+<b>函数签名:</b>
+
+```go
+func Filter[K comparable, V any](m map[K]V, predicate func(key K, value V) bool) map[K]V
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/maputil"
+)
+
+func main() {
+	m := map[string]int{
+		"a": 1,
+		"b": 2,
+		"c": 3,
+		"d": 4,
+		"e": 5,
+	}
+	isEven := func(_ string, value int) bool {
+		return value%2 == 0
+	}
+
+	maputil.Filter(m, func(_ string, value int) {
+		sum += value
+	})
+	res := maputil.Filter(m, isEven)
+	fmt.Println(res) // map[string]int{"b": 2, "d": 4,}
+}
+```
+
+
+
+
+### <span id="Intersect">Intersect</span>
+<p>多个map的交集操作</p>
+
+<b>函数签名:</b>
+
+```go
+func Intersect[K comparable, V any](maps ...map[K]V) map[K]V
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/maputil"
+)
+
+func main() {
+	m1 := map[string]int{
+		"a": 1,
+		"b": 2,
+		"c": 3,
+	}
+
+	m2 := map[string]int{
+		"a": 1,
+		"b": 2,
+		"c": 6,
+		"d": 7,
+	}
+
+	m3 := map[string]int{
+		"a": 1,
+		"b": 9,
+		"e": 9,
+	}
+
+	fmt.Println(maputil.Intersect(m1)) // map[string]int{"a": 1, "b": 2, "c": 3}
+
+	fmt.Println(maputil.Intersect(m1, m2)) // map[string]int{"a": 1, "b": 2}
+
+	fmt.Println(maputil.Intersect(m1, m2, m3)) // map[string]int{"a": 1}
+}
+```
+
+
+
+
+### <span id="Keys">Keys</span>
+<p>返回map中所有key的切片</p>
+
+<b>函数签名:</b>
+
+```go
+func Keys[K comparable, V any](m map[K]V) []K
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/maputil"
+)
+
+func main() {
+	m := map[int]string{
+		1: "a",
+		2: "a",
+		3: "b",
+		4: "c",
+		5: "d",
+	}
+
+	keys := maputil.Keys(m)
+	sort.Ints(keys)
+	fmt.Println(keys) // []int{1, 2, 3, 4, 5}
+}
+```
+
+
+
+
+### <span id="Merge">Merge</span>
+<p>合并多个maps, 相同的key会被后来的key覆盖</p>
+
+<b>函数签名:</b>
+
+```go
+func Merge[K comparable, V any](maps ...map[K]V) map[K]V
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/maputil"
+)
+
+func main() {
+	m1 := map[int]string{
+		1: "a",
+		2: "b",
+	}
+	m2 := map[int]string{
+		1: "1",
+		3: "2",
+	}
+	fmt.Println(maputil.Merge(m1, m2)) // map[int]string{1:"1", 2:"b", 3:"2",}
+}
+```
+
+
+
+### <span id="Minus">Minus</span>
+<p>返回一个map，其中的key存在于mapA，不存在于mapB.</p>
+
+<b>函数签名:</b>
+
+```go
+func Minus[K comparable, V any](mapA, mapB map[K]V) map[K]V
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/maputil"
+)
+
+func main() {
+	m1 := map[string]int{
+		"a": 1,
+		"b": 2,
+		"c": 3,
+	}
+
+	m2 := map[string]int{
+		"a": 11,
+		"b": 22,
+		"d": 33,
+	}
+
+	fmt.Println(maputil.Minus(m1, m2)) //map[string]int{"c": 3}
+}
+```
+
+
+
+### <span id="Values">Values</span>
+<p>返回map中所有value的切片</p>
+
+<b>函数签名:</b>
+
+```go
+func Values[K comparable, V any](m map[K]V) []V
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/maputil"
+)
+
+func main() {
+	m := map[int]string{
+		1: "a",
+		2: "a",
+		3: "b",
+		4: "c",
+		5: "d",
+	}
+
+	values := maputil.Values(m)
+	sort.Strings(values)
+
+	fmt.Println(values) // []string{"a", "a", "b", "c", "d"}
+}
+```
+
+
+### <span id="IsDisjoint">IsDisjoint</span>
+<p>验证两个map是否具有不同的key</p>
+
+<b>函数签名:</b>
+
+```go
+func IsDisjoint[K comparable, V any](mapA, mapB map[K]V) bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/maputil"
+)
+
+func main() {
+	m1 := map[int]string{
+		1: "a",
+		2: "a",
+		3: "b",
+		4: "c",
+		5: "d",
+	}
+
+	m2 := map[int]string{
+		1: "a",
+		2: "a",
+		3: "b",
+		4: "c",
+		5: "d",
+	}
+
+	m3 := map[int]string{
+		6: "a",
+	}
+
+	ok := maputil.IsDisjoint(m2, m1)
+	fmt.Println(ok) // false
+
+	ok = maputil.IsDisjoint(m2, m3)
+	fmt.Println(ok) // true
+}
+```

docs/mathutil.md

@@ -1,54 +1,74 @@
 # Mathutil
-
 Package mathutil implements some functions for math calculation.
 
 <div STYLE="page-break-after: always;"></div>
 
 ## Source:
 
-[https://github.com/duke-git/lancet/blob/v1/mathutil/mathutil.go](https://github.com/duke-git/lancet/blob/v1/mathutil/mathutil.go)
+- [https://github.com/duke-git/lancet/blob/main/mathutil/mathutil.go](https://github.com/duke-git/lancet/blob/main/mathutil/mathutil.go)
+
 
 <div STYLE="page-break-after: always;"></div>
 
 ## Example:
-
 ```go
 import (
-    "github.com/duke-git/lancet/mathutil"
+    "github.com/duke-git/lancet/v2/mathutil"
 )
 ```
 
 <div STYLE="page-break-after: always;"></div>
 
 ## Index
+- [Average](#Average)
+- [Exponent](#Exponent)
+- [Fibonacci](#Fibonacci)
+- [Factorial](#Factorial)
+- [Max](#Max)
+- [MaxBy](#MaxBy)
+- [Min](#Min)
+- [MinBy](#MaxBy)
 
--   [Exponent](#Exponent)
--   [Fibonacci](#Fibonacci)
--   [Factorial](#Factorial)
--   [Percent](#Percent)
--   [RoundToFloat](#RoundToFloat)
--   [RoundToString](#RoundToString)
--   [TruncRound](#TruncRound)
--   [CeilToFloat](#CeilToFloat)
--   [CeilToString](#CeilToString)
--   [FloorToFloat](#FloorToFloat)
--   [FloorToString](#FloorToString)
--   [AngleToRadian](#AngleToRadian)
--   [RadianToAngle](#RadianToAngle)
--   [PointDistance](#PointDistance)
--   [IsPrime](#IsPrime)
--   [GCD](#GCD)
--   [LCM](#LCM)
--   [Cos](#Cos)
--   [Sin](#Sin)
--   [Log](#Log)
+- [Percent](#Percent)
+- [RoundToFloat](#RoundToFloat)
+- [RoundToString](#RoundToString)
+- [TruncRound](#TruncRound)
 
 <div STYLE="page-break-after: always;"></div>
 
 ## Documentation
 
-### <span id="Exponent">Exponent</span>
 
+
+### <span id="Average">Average</span>
+<p>Return average value of numbers. Maybe call RoundToFloat to round result.</p>
+
+<b>Signature:</b>
+
+```go
+func Average[T lancetconstraints.Number](numbers ...T) T
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/mathutil"
+)
+
+func main() {
+	fmt.Println(mathutil.Average(0, 0)) //0
+	fmt.Println(mathutil.Average(1, 1)) //1
+	avg := mathutil.Average(1.2, 1.4) //1.2999999998
+	roundAvg := mmathutil.RoundToFloat(avg, 1) // 1.3
+}
+```
+
+
+
+### <span id="Exponent">Exponent</span>
 <p>Calculate x to the nth power.</p>
 
 <b>Signature:</b>
@@ -56,7 +76,6 @@ import (
 ```go
 func Exponent(x, n int64) int64
 ```
-
 <b>Example:</b>
 
 ```go
@@ -64,18 +83,19 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/mathutil"
+    "github.com/duke-git/lancet/v2/mathutil"
 )
 
 func main() {
-    fmt.Println(mathutil.Exponent(10, 0)) //1
-    fmt.Println(mathutil.Exponent(10, 1)) //10
-    fmt.Println(mathutil.Exponent(10, 2)) //100
+	fmt.Println(mathutil.Exponent(10, 0)) //1
+	fmt.Println(mathutil.Exponent(10, 1)) //10
+	fmt.Println(mathutil.Exponent(10, 2)) //100
 }
 ```
 
-### <span id="Fibonacci">Fibonacci</span>
 
+
+### <span id="Fibonacci">Fibonacci</span>
 <p>Calculate the nth number of fibonacci sequence.</p>
 
 <b>Signature:</b>
@@ -83,7 +103,6 @@ func main() {
 ```go
 func Fibonacci(first, second, n int) int
 ```
-
 <b>Example:</b>
 
 ```go
@@ -91,20 +110,21 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/mathutil"
+    "github.com/duke-git/lancet/v2/mathutil"
 )
 
 func main() {
-    fmt.Println(mathutil.Fibonacci(1, 1, 1)) //1
-    fmt.Println(mathutil.Fibonacci(1, 1, 2)) //1
-    fmt.Println(mathutil.Fibonacci(1, 1, 3)) //2
-    fmt.Println(mathutil.Fibonacci(1, 1, 4)) //3
-    fmt.Println(mathutil.Fibonacci(1, 1, 5)) //5
+	fmt.Println(mathutil.Fibonacci(1, 1, 1)) //1
+	fmt.Println(mathutil.Fibonacci(1, 1, 2)) //1
+	fmt.Println(mathutil.Fibonacci(1, 1, 3)) //2
+	fmt.Println(mathutil.Fibonacci(1, 1, 4)) //3
+	fmt.Println(mathutil.Fibonacci(1, 1, 5)) //5
 }
 ```
 
-### <span id="Factorial">Factorial</span>
 
+
+### <span id="Factorial">Factorial</span>
 <p>Calculate the factorial of x.</p>
 
 <b>Signature:</b>
@@ -112,7 +132,6 @@ func main() {
 ```go
 func Factorial(x uint) uint
 ```
-
 <b>Example:</b>
 
 ```go
@@ -120,19 +139,152 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/mathutil"
+    "github.com/duke-git/lancet/v2/mathutil"
 )
 
 func main() {
-    fmt.Println(mathutil.Factorial(0)) //1
-    fmt.Println(mathutil.Factorial(1)) //1
-    fmt.Println(mathutil.Factorial(2)) //2
-    fmt.Println(mathutil.Factorial(3)) //6
+	fmt.Println(mathutil.Factorial(0)) //1
+	fmt.Println(mathutil.Factorial(1)) //1
+	fmt.Println(mathutil.Factorial(2)) //2
+	fmt.Println(mathutil.Factorial(3)) //6
 }
 ```
 
-### <span id="Percent">Percent</span>
 
+
+### <span id="Max">Max</span>
+<p>Return max value of numbers.</p>
+
+<b>Signature:</b>
+
+```go
+func Max[T lancetconstraints.Number](numbers ...T) T
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/mathutil"
+)
+
+func main() {
+	fmt.Println(mathutil.Max(0, 0)) //0
+	fmt.Println(mathutil.Max(1, 2, 3)) //3
+	fmt.Println(mathutil.Max(1.2, 1.4, 1.1, 1.4)) //1.4
+}
+```
+
+
+
+
+### <span id="MaxBy">MaxBy</span>
+<p>Return the maximum value of a slice using the given comparator function.</p>
+
+<b>Signature:</b>
+
+```go
+func MaxBy[T any](slice []T, comparator func(T, T) bool) T 
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/mathutil"
+)
+
+func main() {
+	res1 := mathutil.MaxBy([]string{"a", "ab", "abc"}, func(v1, v2 string) bool {
+		return len(v1) > len(v2)
+	})
+	fmt.Println(res1) //abc
+
+	res2 := mathutil.MaxBy([]string{"abd", "abc", "ab"}, func(v1, v2 string) bool {
+		return len(v1) > len(v2)
+	})
+	fmt.Println(res2) //abd
+
+	res3 := mathutil.MaxBy([]string{}, func(v1, v2 string) bool {
+		return len(v1) > len(v2)
+	})
+	fmt.Println(res3) //“”
+}
+```
+
+
+
+### <span id="Min">Min</span>
+<p>Return min value of numbers.</p>
+
+<b>Signature:</b>
+
+```go
+func Min[T lancetconstraints.Number](numbers ...T) T
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/mathutil"
+)
+
+func main() {
+	fmt.Println(mathutil.Min(0, 0)) //0
+	fmt.Println(mathutil.Min(1, 2, 3)) //1
+	fmt.Println(mathutil.Min(1.2, 1.4, 1.1, 1.4)) //1.1
+}
+```
+
+
+
+### <span id="MinBy">MinBy</span>
+<p>Return the minimum value of a slice using the given comparator function.</p>
+
+<b>Signature:</b>
+
+```go
+func MinBy[T any](slice []T, comparator func(T, T) bool) T 
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/mathutil"
+)
+
+func main() {
+	res1 := mathutil.MinBy([]string{"a", "ab", "abc"}, func(v1, v2 string) bool {
+		return len(v1) < len(v2)
+	})
+	fmt.Println(res1) //a
+
+	res2 := mathutil.MinBy([]string{"ab", "ac", "abc"}, func(v1, v2 string) bool {
+		return len(v1) < len(v2)
+	})
+	fmt.Println(res2) //ab
+
+	res3 := mathutil.MinBy([]string{}, func(v1, v2 string) bool {
+		return len(v1) < len(v2)
+	})
+	fmt.Println(res3) //“”
+}
+```
+
+
+
+
+### <span id="Percent">Percent</span>
 <p>calculate the percentage of val to total, retain n decimal places.</p>
 
 <b>Signature:</b>
@@ -140,7 +292,6 @@ func main() {
 ```go
 func Percent(val, total float64, n int) float64
 ```
-
 <b>Example:</b>
 
 ```go
@@ -148,17 +299,18 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/mathutil"
+    "github.com/duke-git/lancet/v2/mathutil"
 )
 
 func main() {
-    fmt.Println(mathutil.Percent(1, 2, 2)) //1
-    fmt.Println(mathutil.Percent(0.1, 0.3, 2)) //33.33
+	fmt.Println(mathutil.Percent(1, 2, 2)) //1
+	fmt.Println(mathutil.Percent(0.1, 0.3, 2)) //33.33
 }
 ```
 
-### <span id="RoundToFloat">RoundToFloat</span>
 
+
+### <span id="RoundToFloat">RoundToFloat</span>
 <p>Round float up to n decimal places.</p>
 
 <b>Signature:</b>
@@ -166,7 +318,6 @@ func main() {
 ```go
 func RoundToFloat(x float64, n int) float64
 ```
-
 <b>Example:</b>
 
 ```go
@@ -174,20 +325,22 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/mathutil"
+    "github.com/duke-git/lancet/v2/mathutil"
 )
 
 func main() {
-    fmt.Println(mathutil.RoundToFloat(0, 0)) //0
-    fmt.Println(mathutil.RoundToFloat(0, 1)) //0
-    fmt.Println(mathutil.RoundToFloat(0.124, 2)) //0.12
-    fmt.Println(mathutil.RoundToFloat(0.125, 2)) //0.13
-    fmt.Println(mathutil.RoundToFloat(0.125, 3)) //0.125
+	fmt.Println(mathutil.RoundToFloat(0, 0)) //0
+	fmt.Println(mathutil.RoundToFloat(0, 1)) //0
+	fmt.Println(mathutil.RoundToFloat(0.124, 2)) //0.12
+	fmt.Println(mathutil.RoundToFloat(0.125, 2)) //0.13
+	fmt.Println(mathutil.RoundToFloat(0.125, 3)) //0.125
 }
 ```
 
-### <span id="RoundToString">RoundToString</span>
 
+
+
+### <span id="RoundToString">RoundToString</span>
 <p>Round float up to n decimal places. will return string.</p>
 
 <b>Signature:</b>
@@ -195,7 +348,6 @@ func main() {
 ```go
 func RoundToString(x float64, n int) string
 ```
-
 <b>Example:</b>
 
 ```go
@@ -203,20 +355,21 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/mathutil"
+    "github.com/duke-git/lancet/v2/mathutil"
 )
 
 func main() {
-    fmt.Println(mathutil.RoundToString(0, 0)) //"0"
-    fmt.Println(mathutil.RoundToString(0, 1)) //"0.0:
-    fmt.Println(mathutil.RoundToString(0.124, 2)) //"0.12"
-    fmt.Println(mathutil.RoundToString(0.125, 2)) //"0.13"
-    fmt.Println(mathutil.RoundToString(0.125, 3)) //"0.125"
+	fmt.Println(mathutil.RoundToString(0, 0)) //"0"
+	fmt.Println(mathutil.RoundToString(0, 1)) //"0.0:
+	fmt.Println(mathutil.RoundToString(0.124, 2)) //"0.12"
+	fmt.Println(mathutil.RoundToString(0.125, 2)) //"0.13"
+	fmt.Println(mathutil.RoundToString(0.125, 3)) //"0.125"
 }
 ```
 
-### <span id="TruncRound">TruncRound</span>
 
+
+### <span id="TruncRound">TruncRound</span>
 <p>Round float off n decimal places.</p>
 
 <b>Signature:</b>
@@ -224,7 +377,6 @@ func main() {
 ```go
 func TruncRound(x float64, n int) float64
 ```
-
 <b>Example:</b>
 
 ```go
@@ -232,497 +384,17 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/mathutil"
+    "github.com/duke-git/lancet/v2/mathutil"
 )
 
 func main() {
-    fmt.Println(mathutil.TruncRound(0, 0)) //0
-    fmt.Println(mathutil.TruncRound(0, 1)) //0
-    fmt.Println(mathutil.TruncRound(0.124, 2)) //0.12
-    fmt.Println(mathutil.TruncRound(0.125, 2)) //0.12
-    fmt.Println(mathutil.TruncRound(0.125, 3)) //0.125
+	fmt.Println(mathutil.TruncRound(0, 0)) //0
+	fmt.Println(mathutil.TruncRound(0, 1)) //0
+	fmt.Println(mathutil.TruncRound(0.124, 2)) //0.12
+	fmt.Println(mathutil.TruncRound(0.125, 2)) //0.12
+	fmt.Println(mathutil.TruncRound(0.125, 3)) //0.125
 }
 ```
 
-### <span id="CeilToFloat">CeilToFloat</span>
 
-<p>Round float up n decimal places.</p>
 
-<b>Signature:</b>
-
-```go
-func CeilToFloat(x float64, n int) float64
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-	result1 := mathutil.CeilToFloat(3.14159, 1)
-	result2 := mathutil.CeilToFloat(3.14159, 2)
-	result3 := mathutil.CeilToFloat(5, 4)
-
-	fmt.Println(result1)
-	fmt.Println(result2)
-	fmt.Println(result3)
-
-	// Output:
-	// 3.2
-	// 3.15
-	// 5
-}
-```
-
-### <span id="CeilToString">CeilToString</span>
-
-<p>Round float up n decimal places.</p>
-
-<b>Signature:</b>
-
-```go
-func CeilToString(x float64, n int) string
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-	result1 := mathutil.CeilToString(3.14159, 1)
-	result2 := mathutil.CeilToString(3.14159, 2)
-	result3 := mathutil.CeilToString(5, 4)
-
-	fmt.Println(result1)
-	fmt.Println(result2)
-	fmt.Println(result3)
-
-	// Output:
-	// 3.2
-	// 3.15
-	// 5.0000
-}
-```
-
-### <span id="FloorToFloat">FloorToFloat</span>
-
-<p>Round float down n decimal places.</p>
-
-<b>Signature:</b>
-
-```go
-func CeilToString(x float64, n int) string
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-	result1 := mathutil.FloorToFloat(3.14159, 1)
-	result2 := mathutil.FloorToFloat(3.14159, 2)
-	result3 := mathutil.FloorToFloat(5, 4)
-
-	fmt.Println(result1)
-	fmt.Println(result2)
-	fmt.Println(result3)
-
-	// Output:
-	// 3.1
-	// 3.14
-	// 5
-}
-```
-
-### <span id="FloorToString">FloorToString</span>
-
-<p>Round float down n decimal places.</p>
-
-<b>Signature:</b>
-
-```go
-func CeilToString(x float64, n int) string
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-	result1 := mathutil.FloorToString(3.14159, 1)
-	result2 := mathutil.FloorToString(3.14159, 2)
-	result3 := mathutil.FloorToString(5, 4)
-
-	fmt.Println(result1)
-	fmt.Println(result2)
-	fmt.Println(result3)
-
-	// Output:
-	// 3.1
-	// 3.14
-	// 5.0000
-}
-```
-
-### <span id="AngleToRadian">AngleToRadian</span>
-
-<p>Converts angle value to radian value.</p>
-
-<b>Signature:</b>
-
-```go
-func AngleToRadian(angle float64) float64
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.AngleToRadian(45)
-    result2 := mathutil.AngleToRadian(90)
-    result3 := mathutil.AngleToRadian(180)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-
-    // Output:
-    // 0.7853981633974483
-    // 1.5707963267948966
-    // 3.141592653589793
-}
-```
-
-### <span id="RadianToAngle">RadianToAngle</span>
-
-<p>Converts radian value to angle value.</p>
-
-<b>Signature:</b>
-
-```go
-func RadianToAngle(radian float64) float64
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.RadianToAngle(math.Pi)
-    result2 := mathutil.RadianToAngle(math.Pi / 2)
-    result3 := mathutil.RadianToAngle(math.Pi / 4)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-
-    // Output:
-    // 180
-    // 90
-    // 45
-}
-```
-
-### <span id="PointDistance">PointDistance</span>
-
-<p>Caculates two points distance.</p>
-
-<b>Signature:</b>
-
-```go
-func PointDistance(x1, y1, x2, y2 float64) float64
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.PointDistance(1, 1, 4, 5)
-
-    fmt.Println(result1)
-
-    // Output:
-    // 5
-}
-```
-
-### <span id="IsPrime">IsPrime</span>
-
-<p>Checks if number is prime number.</p>
-
-<b>Signature:</b>
-
-```go
-func IsPrime(n int) bool
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.IsPrime(-1)
-    result2 := mathutil.IsPrime(0)
-    result3 := mathutil.IsPrime(1)
-    result4 := mathutil.IsPrime(2)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-
-    // Output:
-    // false
-    // false
-    // false
-    // true
-}
-```
-
-### <span id="GCD">GCD</span>
-
-<p>Return greatest common divisor (GCD) of integers.</p>
-
-<b>Signature:</b>
-
-```go
-func GCD(integers ...int) int
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.GCD(1, 1)
-    result2 := mathutil.GCD(1, -1)
-    result3 := mathutil.GCD(-1, 1)
-    result4 := mathutil.GCD(-1, -1)
-    result5 := mathutil.GCD(3, 6, 9)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-    fmt.Println(result5)
-
-    // Output:
-    // 1
-    // 1
-    // -1
-    // -1
-    // 3
-}
-```
-
-### <span id="LCM">LCM</span>
-
-<p>Return Least Common Multiple (LCM) of integers.</p>
-
-<b>Signature:</b>
-
-```go
-func LCM(integers ...int) int
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.LCM(1, 1)
-    result2 := mathutil.LCM(1, 2)
-    result3 := mathutil.LCM(3, 6, 9)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-
-    // Output:
-    // 1
-    // 2
-    // 18
-}
-```
-
-### <span id="Cos">Cos</span>
-
-<p>Returns the cosine of the radian argument.</p>
-
-<b>Signature:</b>
-
-```go
-func Cos(radian float64, precision ...int) float64
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.Cos(0)
-    result2 := mathutil.Cos(90)
-    result3 := mathutil.Cos(180)
-    result4 := mathutil.Cos(math.Pi)
-    result5 := mathutil.Cos(math.Pi / 2)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-    fmt.Println(result5)
-
-    // Output:
-    // 1
-    // -0.447
-    // -0.598
-    // -1
-    // 0
-}
-```
-
-### <span id="Sin">Sin</span>
-
-<p>Returns the sine of the radian argument.</p>
-
-<b>Signature:</b>
-
-```go
-func Sin(radian float64, precision ...int) float64
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.Sin(0)
-    result2 := mathutil.Sin(90)
-    result3 := mathutil.Sin(180)
-    result4 := mathutil.Sin(math.Pi)
-    result5 := mathutil.Sin(math.Pi / 2)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-    fmt.Println(result5)
-
-    // Output:
-    // 0
-    // 0.894
-    // -0.801
-    // 0
-    // 1
-}
-```
-
-### <span id="Log">Log</span>
-
-<p>Returns the logarithm of base n.</p>
-
-<b>Signature:</b>
-
-```go
-func Log(n, base float64) float64
-```
-
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.Log(8, 2)
-    result2 := mathutil.TruncRound(mathutil.Log(5, 2), 2)
-    result3 := mathutil.TruncRound(mathutil.Log(27, 3), 0)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-
-    // Output:
-    // 3
-    // 2.32
-    // 3
-}
-```

docs/mathutil_zh-CN.md

@@ -1,54 +1,72 @@
 # Mathutil
-
-mathutil 包实现了一些数学计算的函数.
+mathutil包实现了一些数学计算的函数.
 
 <div STYLE="page-break-after: always;"></div>
 
 ## 源码:
 
-[https://github.com/duke-git/lancet/blob/v1/mathutil/mathutil.go](https://github.com/duke-git/lancet/blob/v1/mathutil/mathutil.go)
+- [https://github.com/duke-git/lancet/blob/main/mathutil/mathutil.go](https://github.com/duke-git/lancet/blob/main/mathutil/mathutil.go)
+
 
 <div STYLE="page-break-after: always;"></div>
 
 ## 用法:
-
 ```go
 import (
-    "github.com/duke-git/lancet/mathutil"
+    "github.com/duke-git/lancet/v2/mathutil"
 )
 ```
 
 <div STYLE="page-break-after: always;"></div>
 
 ## 目录
-
--   [Exponent](#Exponent)
--   [Fibonacci](#Fibonacci)
--   [Factorial](#Factorial)
--   [Percent](#Percent)
--   [RoundToFloat](#RoundToFloat)
--   [RoundToString](#RoundToString)
--   [TruncRound](#TruncRound)
--   [CeilToFloat](#CeilToFloat)
--   [CeilToString](#CeilToString)
--   [FloorToFloat](#FloorToFloat)
--   [FloorToString](#FloorToString)
--   [AngleToRadian](#AngleToRadian)
--   [RadianToAngle](#RadianToAngle)
--   [PointDistance](#PointDistance)
--   [IsPrime](#IsPrime)
--   [GCD](#GCD)
--   [LCM](#LCM)
--   [Cos](#Cos)
--   [Sin](#Sin)
--   [Log](#Log)
+- [Average](#Average)
+- [Exponent](#Exponent)
+- [Fibonacci](#Fibonacci)
+- [Factorial](#Factorial)
+- [Max](#Max)
+- [MaxBy](#MaxBy)
+- [Min](#Min)
+- [MinBy](#MaxBy)
+  
+- [Percent](#Percent)
+- [RoundToFloat](#RoundToFloat)
+- [RoundToString](#RoundToString)
+- [TruncRound](#TruncRound)
 
 <div STYLE="page-break-after: always;"></div>
 
 ## Documentation
 
-### <span id="Exponent">Exponent</span>
 
+### <span id="Average">Average</span>
+<p>计算平均数. 可能需要对结果调用RoundToFloat方法四舍五入</p>
+
+<b>函数签名:</b>
+
+```go
+func Average[T lancetconstraints.Number](numbers ...T) T
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/mathutil"
+)
+
+func main() {
+	fmt.Println(mathutil.Average(0, 0)) //0
+	fmt.Println(mathutil.Average(1, 1)) //1
+	avg := mathutil.Average(1.2, 1.4) //1.2999999998
+	roundAvg := mmathutil.RoundToFloat(avg, 1) // 1.3
+}
+```
+
+
+### <span id="Exponent">Exponent</span>
 <p>指数计算（x的n次方）</p>
 
 <b>函数签名:</b>
@@ -56,7 +74,6 @@ import (
 ```go
 func Exponent(x, n int64) int64
 ```
-
 <b>例子:</b>
 
 ```go
@@ -64,18 +81,19 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/mathutil"
+    "github.com/duke-git/lancet/v2/mathutil"
 )
 
 func main() {
-    fmt.Println(mathutil.Exponent(10, 0)) //1
-    fmt.Println(mathutil.Exponent(10, 1)) //10
-    fmt.Println(mathutil.Exponent(10, 2)) //100
+	fmt.Println(mathutil.Exponent(10, 0)) //1
+	fmt.Println(mathutil.Exponent(10, 1)) //10
+	fmt.Println(mathutil.Exponent(10, 2)) //100
 }
 ```
 
-### <span id="Fibonacci">Fibonacci</span>
 
+
+### <span id="Fibonacci">Fibonacci</span>
 <p>计算斐波那契数列的第n个数</p>
 
 <b>函数签名:</b>
@@ -83,7 +101,6 @@ func main() {
 ```go
 func Fibonacci(first, second, n int) int
 ```
-
 <b>例子:</b>
 
 ```go
@@ -91,20 +108,21 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/mathutil"
+    "github.com/duke-git/lancet/v2/mathutil"
 )
 
 func main() {
-    fmt.Println(mathutil.Fibonacci(1, 1, 1)) //1
-    fmt.Println(mathutil.Fibonacci(1, 1, 2)) //1
-    fmt.Println(mathutil.Fibonacci(1, 1, 3)) //2
-    fmt.Println(mathutil.Fibonacci(1, 1, 4)) //3
-    fmt.Println(mathutil.Fibonacci(1, 1, 5)) //5
+	fmt.Println(mathutil.Fibonacci(1, 1, 1)) //1
+	fmt.Println(mathutil.Fibonacci(1, 1, 2)) //1
+	fmt.Println(mathutil.Fibonacci(1, 1, 3)) //2
+	fmt.Println(mathutil.Fibonacci(1, 1, 4)) //3
+	fmt.Println(mathutil.Fibonacci(1, 1, 5)) //5
 }
 ```
 
-### <span id="Factorial">Factorial</span>
 
+
+### <span id="Factorial">Factorial</span>
 <p>计算阶乘</p>
 
 <b>函数签名:</b>
@@ -112,7 +130,6 @@ func main() {
 ```go
 func Factorial(x uint) uint
 ```
-
 <b>例子:</b>
 
 ```go
@@ -120,19 +137,151 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/mathutil"
+    "github.com/duke-git/lancet/v2/mathutil"
 )
 
 func main() {
-    fmt.Println(mathutil.Factorial(0)) //1
-    fmt.Println(mathutil.Factorial(1)) //1
-    fmt.Println(mathutil.Factorial(2)) //2
-    fmt.Println(mathutil.Factorial(3)) //6
+	fmt.Println(mathutil.Factorial(0)) //1
+	fmt.Println(mathutil.Factorial(1)) //1
+	fmt.Println(mathutil.Factorial(2)) //2
+	fmt.Println(mathutil.Factorial(3)) //6
 }
 ```
 
-### <span id="Percent">Percent</span>
 
+### <span id="Max">Max</span>
+<p>返回参数中的最大数</p>
+
+<b>函数签名:</b>
+
+```go
+func Max[T lancetconstraints.Number](numbers ...T) T
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/mathutil"
+)
+
+func main() {
+	fmt.Println(mathutil.Max(0, 0)) //0
+	fmt.Println(mathutil.Max(1, 2, 3)) //3
+	fmt.Println(mathutil.Max(1.2, 1.4, 1.1, 1.4)) //1.4
+}
+```
+
+
+
+### <span id="MaxBy">MaxBy</span>
+<p>使用给定的比较器函数返回切片的最大值</p>
+
+<b>函数签名:</b>
+
+```go
+func MaxBy[T any](slice []T, comparator func(T, T) bool) T 
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/mathutil"
+)
+
+func main() {
+	res1 := mathutil.MaxBy([]string{"a", "ab", "abc"}, func(v1, v2 string) bool {
+		return len(v1) > len(v2)
+	})
+	fmt.Println(res1) //abc
+
+	res2 := mathutil.MaxBy([]string{"abd", "abc", "ab"}, func(v1, v2 string) bool {
+		return len(v1) > len(v2)
+	})
+	fmt.Println(res2) //abd
+
+	res3 := mathutil.MaxBy([]string{}, func(v1, v2 string) bool {
+		return len(v1) > len(v2)
+	})
+	fmt.Println(res3) //“”
+}
+```
+
+
+
+
+### <span id="Min">Min</span>
+<p>返回参数中的最小数</p>
+
+<b>函数签名:</b>
+
+```go
+func Min[T lancetconstraints.Number](numbers ...T) T
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/mathutil"
+)
+
+func main() {
+	fmt.Println(mathutil.Min(0, 0)) //0
+	fmt.Println(mathutil.Min(1, 2, 3)) //1
+	fmt.Println(mathutil.Min(1.2, 1.4, 1.1, 1.4)) //1.1
+}
+```
+
+
+
+### <span id="MinBy">MinBy</span>
+<p>使用给定的比较器函数返回切片的最小值</p>
+
+<b>函数签名:</b>
+
+```go
+func MinBy[T any](slice []T, comparator func(T, T) bool) T 
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/mathutil"
+)
+
+func main() {
+	res1 := mathutil.MinBy([]string{"a", "ab", "abc"}, func(v1, v2 string) bool {
+		return len(v1) < len(v2)
+	})
+	fmt.Println(res1) //a
+
+	res2 := mathutil.MinBy([]string{"ab", "ac", "abc"}, func(v1, v2 string) bool {
+		return len(v1) < len(v2)
+	})
+	fmt.Println(res2) //ab
+
+	res3 := mathutil.MinBy([]string{}, func(v1, v2 string) bool {
+		return len(v1) < len(v2)
+	})
+	fmt.Println(res3) //“”
+}
+```
+
+
+
+
+### <span id="Percent">Percent</span>
 <p>计算百分比，保留n位小数</p>
 
 <b>函数签名:</b>
@@ -140,7 +289,6 @@ func main() {
 ```go
 func Percent(val, total float64, n int) float64
 ```
-
 <b>例子:</b>
 
 ```go
@@ -148,17 +296,18 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/mathutil"
+    "github.com/duke-git/lancet/v2/mathutil"
 )
 
 func main() {
-    fmt.Println(mathutil.Percent(1, 2, 2)) //1
-    fmt.Println(mathutil.Percent(0.1, 0.3, 2)) //33.33
+	fmt.Println(mathutil.Percent(1, 2, 2)) //1
+	fmt.Println(mathutil.Percent(0.1, 0.3, 2)) //33.33
 }
 ```
 
-### <span id="RoundToFloat">RoundToFloat</span>
 
+
+### <span id="RoundToFloat">RoundToFloat</span>
 <p>四舍五入，保留n位小数</p>
 
 <b>函数签名:</b>
@@ -166,7 +315,6 @@ func main() {
 ```go
 func RoundToFloat(x float64, n int) float64
 ```
-
 <b>例子:</b>
 
 ```go
@@ -174,20 +322,22 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/mathutil"
+    "github.com/duke-git/lancet/v2/mathutil"
 )
 
 func main() {
-    fmt.Println(mathutil.RoundToFloat(0, 0)) //0
-    fmt.Println(mathutil.RoundToFloat(0, 1)) //0
-    fmt.Println(mathutil.RoundToFloat(0.124, 2)) //0.12
-    fmt.Println(mathutil.RoundToFloat(0.125, 2)) //0.13
-    fmt.Println(mathutil.RoundToFloat(0.125, 3)) //0.125
+	fmt.Println(mathutil.RoundToFloat(0, 0)) //0
+	fmt.Println(mathutil.RoundToFloat(0, 1)) //0
+	fmt.Println(mathutil.RoundToFloat(0.124, 2)) //0.12
+	fmt.Println(mathutil.RoundToFloat(0.125, 2)) //0.13
+	fmt.Println(mathutil.RoundToFloat(0.125, 3)) //0.125
 }
 ```
 
-### <span id="RoundToString">RoundToString</span>
 
+
+
+### <span id="RoundToString">RoundToString</span>
 <p>四舍五入，保留n位小数，返回字符串</p>
 
 <b>函数签名:</b>
@@ -195,7 +345,6 @@ func main() {
 ```go
 func RoundToString(x float64, n int) string
 ```
-
 <b>例子:</b>
 
 ```go
@@ -203,20 +352,21 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/mathutil"
+    "github.com/duke-git/lancet/v2/mathutil"
 )
 
 func main() {
-    fmt.Println(mathutil.RoundToString(0, 0)) //"0"
-    fmt.Println(mathutil.RoundToString(0, 1)) //"0.0:
-    fmt.Println(mathutil.RoundToString(0.124, 2)) //"0.12"
-    fmt.Println(mathutil.RoundToString(0.125, 2)) //"0.13"
-    fmt.Println(mathutil.RoundToString(0.125, 3)) //"0.125"
+	fmt.Println(mathutil.RoundToString(0, 0)) //"0"
+	fmt.Println(mathutil.RoundToString(0, 1)) //"0.0:
+	fmt.Println(mathutil.RoundToString(0.124, 2)) //"0.12"
+	fmt.Println(mathutil.RoundToString(0.125, 2)) //"0.13"
+	fmt.Println(mathutil.RoundToString(0.125, 3)) //"0.125"
 }
 ```
 
-### <span id="TruncRound">TruncRound</span>
 
+
+### <span id="TruncRound">TruncRound</span>
 <p>截短n位小数（不进行四舍五入）</p>
 
 <b>函数签名:</b>
@@ -224,7 +374,6 @@ func main() {
 ```go
 func TruncRound(x float64, n int) float64
 ```
-
 <b>例子:</b>
 
 ```go
@@ -232,501 +381,17 @@ package main
 
 import (
     "fmt"
-    "github.com/duke-git/lancet/mathutil"
+    "github.com/duke-git/lancet/v2/mathutil"
 )
 
 func main() {
-    fmt.Println(mathutil.TruncRound(0, 0)) //0
-    fmt.Println(mathutil.TruncRound(0, 1)) //0
-    fmt.Println(mathutil.TruncRound(0.124, 2)) //0.12
-    fmt.Println(mathutil.TruncRound(0.125, 2)) //0.12
-    fmt.Println(mathutil.TruncRound(0.125, 3)) //0.125
-}
-```
-
-### <span id="CeilToFloat">CeilToFloat</span>
-
-<p>向上舍入（进一法），保留n位小数。</p>
-
-<b>函数签名:</b>
-
-```go
-func CeilToFloat(x float64, n int) float64
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.CeilToFloat(3.14159, 1)
-    result2 := mathutil.CeilToFloat(3.14159, 2)
-    result3 := mathutil.CeilToFloat(5, 4)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-
-    // Output:
-    // 3.2
-    // 3.15
-    // 5
-}
-```
-
-### <span id="CeilToString">CeilToString</span>
-
-<p>向上舍入（进一法），保留n位小数，返回字符串。</p>
-
-<b>函数签名:</b>
-
-```go
-func CeilToString(x float64, n int) string
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.CeilToString(3.14159, 1)
-    result2 := mathutil.CeilToString(3.14159, 2)
-    result3 := mathutil.CeilToString(5, 4)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-
-    // Output:
-    // 3.2
-    // 3.15
-    // 5.0000
-}
-```
-
-### <span id="FloorToFloat">FloorToFloat</span>
-
-<p>向下舍入（去尾法），保留n位小数。</p>
-
-<b>函数签名:</b>
-
-```go
-func CeilToString(x float64, n int) string
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.FloorToFloat(3.14159, 1)
-    result2 := mathutil.FloorToFloat(3.14159, 2)
-    result3 := mathutil.FloorToFloat(5, 4)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-
-    // Output:
-    // 3.1
-    // 3.14
-    // 5
-}
-```
-
-### <span id="FloorToString">FloorToString</span>
-
-<p>向下舍入（去尾法），保留n位小数，返回字符串。</p>
-
-<b>函数签名:</b>
-
-```go
-func CeilToString(x float64, n int) string
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.FloorToString(3.14159, 1)
-    result2 := mathutil.FloorToString(3.14159, 2)
-    result3 := mathutil.FloorToString(5, 4)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-
-    // Output:
-    // 3.1
-    // 3.14
-    // 5.0000
+	fmt.Println(mathutil.TruncRound(0, 0)) //0
+	fmt.Println(mathutil.TruncRound(0, 1)) //0
+	fmt.Println(mathutil.TruncRound(0.124, 2)) //0.12
+	fmt.Println(mathutil.TruncRound(0.125, 2)) //0.12
+	fmt.Println(mathutil.TruncRound(0.125, 3)) //0.125
 }
 ```
 
 
-### <span id="AngleToRadian">AngleToRadian</span>
 
-<p>将角度值转为弧度值</p>
-
-<b>函数签名:</b>
-
-```go
-func AngleToRadian(angle float64) float64
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.AngleToRadian(45)
-    result2 := mathutil.AngleToRadian(90)
-    result3 := mathutil.AngleToRadian(180)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-
-    // Output:
-    // 0.7853981633974483
-    // 1.5707963267948966
-    // 3.141592653589793
-}
-```
-
-### <span id="RadianToAngle">RadianToAngle</span>
-
-<p>将弧度值转为角度值</p>
-
-<b>函数签名:</b>
-
-```go
-func RadianToAngle(radian float64) float64
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.RadianToAngle(math.Pi)
-    result2 := mathutil.RadianToAngle(math.Pi / 2)
-    result3 := mathutil.RadianToAngle(math.Pi / 4)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-
-    // Output:
-    // 180
-    // 90
-    // 45
-}
-```
-
-### <span id="PointDistance">PointDistance</span>
-
-<p>计算两个坐标点的距离</p>
-
-<b>函数签名:</b>
-
-```go
-func PointDistance(x1, y1, x2, y2 float64) float64
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.PointDistance(1, 1, 4, 5)
-
-    fmt.Println(result1)
-
-    // Output:
-    // 5
-}
-```
-
-### <span id="IsPrime">IsPrime</span>
-
-<p>判断质数。</p>
-
-<b>函数签名:</b>
-
-```go
-func IsPrime(n int) bool
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.IsPrime(-1)
-    result2 := mathutil.IsPrime(0)
-    result3 := mathutil.IsPrime(1)
-    result4 := mathutil.IsPrime(2)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-
-    // Output:
-    // false
-    // false
-    // false
-    // true
-}
-```
-
-
-### <span id="GCD">GCD</span>
-
-<p>计算整数最大公约数。</p>
-
-<b>函数签名:</b>
-
-```go
-func GCD(integers ...int) int
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.GCD(1, 1)
-    result2 := mathutil.GCD(1, -1)
-    result3 := mathutil.GCD(-1, 1)
-    result4 := mathutil.GCD(-1, -1)
-    result5 := mathutil.GCD(3, 6, 9)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-    fmt.Println(result5)
-
-    // Output:
-    // 1
-    // 1
-    // -1
-    // -1
-    // 3
-}
-```
-
-### <span id="LCM">LCM</span>
-
-<p>计算整数最小公倍数。</p>
-
-<b>函数签名:</b>
-
-```go
-func LCM(integers ...int) int
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.LCM(1, 1)
-    result2 := mathutil.LCM(1, 2)
-    result3 := mathutil.LCM(3, 6, 9)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-
-    // Output:
-    // 1
-    // 2
-    // 18
-}
-```
-
-
-### <span id="Cos">Cos</span>
-
-<p>计算弧度的余弦值。</p>
-
-<b>函数签名:</b>
-
-```go
-func Cos(radian float64, precision ...int) float64
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.Cos(0)
-    result2 := mathutil.Cos(90)
-    result3 := mathutil.Cos(180)
-    result4 := mathutil.Cos(math.Pi)
-    result5 := mathutil.Cos(math.Pi / 2)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-    fmt.Println(result5)
-
-    // Output:
-    // 1
-    // -0.447
-    // -0.598
-    // -1
-    // 0
-}
-```
-
-
-### <span id="Sin">Sin</span>
-
-<p>计算弧度的正弦值。</p>
-
-<b>函数签名:</b>
-
-```go
-func Sin(radian float64, precision ...int) float64
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.Sin(0)
-    result2 := mathutil.Sin(90)
-    result3 := mathutil.Sin(180)
-    result4 := mathutil.Sin(math.Pi)
-    result5 := mathutil.Sin(math.Pi / 2)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-    fmt.Println(result4)
-    fmt.Println(result5)
-
-    // Output:
-    // 0
-    // 0.894
-    // -0.801
-    // 0
-    // 1
-}
-```
-
-### <span id="Log">Log</span>
-
-<p>计算以base为底n的对数。</p>
-
-<b>函数签名:</b>
-
-```go
-func Log(n, base float64) float64
-```
-
-<b>示例:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/mathutil"
-)
-
-func main() {
-    result1 := mathutil.Log(8, 2)
-    result2 := mathutil.TruncRound(mathutil.Log(5, 2), 2)
-    result3 := mathutil.TruncRound(mathutil.Log(27, 3), 0)
-
-    fmt.Println(result1)
-    fmt.Println(result2)
-    fmt.Println(result3)
-
-    // Output:
-    // 3
-    // 2.32
-    // 3
-}
-```