release v1.3.1

doc: update document for system package
doc: update slice document
2026-02-05 13:22:26 +08:00 · 2022-08-02 17:52:18 +08:00 · 2022-07-29 13:33:23 +08:00 · 2022-07-29 13:31:04 +08:00 · 2022-07-29 13:28:25 +08:00 · 2022-07-29 13:23:30 +08:00
106 changed files with 3440 additions and 6367 deletions
--- a/.github/workflows/codecov.yml
+++ b/.github/workflows/codecov.yml
@@ -17,7 +17,7 @@ jobs:
          fetch-depth: 2
      - uses: actions/setup-go@v2
        with:
-          go-version: "1.18"
+          go-version: "1.16"
      - name: Run coverage
        run: go test -v ./... -coverprofile=coverage.txt -covermode=atomic
      - name: Upload coverage to Codecov
--- a/.gitignore
+++ b/.gitignore
@@ -6,4 +6,5 @@ fileutil/*.txt
 fileutil/*.zip
 fileutil/*.link
 fileutil/unzip/*
+slice/testdata/*
 cryptor/*.pem
--- a/README.md
+++ b/README.md
@@ -3,10 +3,10 @@

 <br/>

-![Go version](https://img.shields.io/badge/go-%3E%3D1.16<recommend>-9cf)
-[![Release](https://img.shields.io/badge/release-2.0.0-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)
+![Go version](https://img.shields.io/badge/go-v1.16-9cf)
+[![Release](https://img.shields.io/badge/release-1.3.1-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)
 [![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/main/LICENSE)
@@ -24,21 +24,14 @@ English | [简体中文](./README_zh-CN.md)
 ## Feature

 - 👏 Comprehensive, efficient and reusable.
- 💪 250+ go util functions, support string, slice, datetime, net, crypt...
+- 💪 200+ 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/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 v1.2.6. </b>
-```go
-go get github.com/duke-git/lancet@v1.2.6 // below go1.18, install latest version of v1.x.x
+go get github.com/duke-git/lancet
 ```

 ## Usage
@@ -46,7 +39,7 @@ go get github.com/duke-git/lancet@v1.2.6 // below go1.18, install latest version
 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/v2/strutil"
+import "github.com/duke-git/lancet/strutil"
 ```

 ## Example
@@ -69,31 +62,10 @@ func main() {
 ```

 ## API Documentation
-
-### Algorithm package implements some basic algorithm. eg. sort, search.
+### 1. Convertor package contains some functions for data convertion.

 ```go
-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)
-
-
-### Convertor package contains some functions for data convertion.
-
-```go
-import "github.com/duke-git/lancet/v2/convertor"
+import "github.com/duke-git/lancet/convertor"
 ```
 #### Function list:
 - [ColorHexToRGB](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ColorHexToRGB)
@@ -101,15 +73,16 @@ import "github.com/duke-git/lancet/v2/convertor"
 - [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)
 - [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)
 - [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)
  
-### Cryptor package is for data encryption and decryption.
+### 2. Cryptor package is for data encryption and decryption.

 ```go
-import "github.com/duke-git/lancet/v2/cryptor"
+import "github.com/duke-git/lancet/cryptor"
 ```

 #### Function list:
@@ -146,11 +119,11 @@ import "github.com/duke-git/lancet/v2/cryptor"
 - [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)

-### Datetime package supports date and time format and compare.
+### 3. Datetime package supports date and time format and compare.


 ```go
-import "github.com/duke-git/lancet/v2/datetime"
+import "github.com/duke-git/lancet/datetime"
 ```
 #### Function list:
 - [AddDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#AddDay)
@@ -175,17 +148,26 @@ import "github.com/duke-git/lancet/v2/datetime"
 - [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)

-### Fileutil package implements some basic functions for file operations.
+### 4. Fileutil package implements some basic functions for file operations.

 ```go
-import "github.com/duke-git/lancet/v2/fileutil"
+import "github.com/duke-git/lancet/fileutil"
 ```

 #### Function list：

 - [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)
@@ -199,10 +181,10 @@ import "github.com/duke-git/lancet/v2/fileutil"
 - [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)

-### Formatter contains some functions for data formatting.
+### 5. Formatter contains some functions for data formatting.

 ```go
-import "github.com/duke-git/lancet/v2/formatter"
+import "github.com/duke-git/lancet/formatter"
 ```
 #### Function list:
 - [Comma](https://github.com/duke-git/lancet/blob/main/docs/formatter.md#Comma)
@@ -210,7 +192,7 @@ import "github.com/duke-git/lancet/v2/formatter"
 ### Function package can control the flow of function execution and support part of functional programming

 ```go
-import "github.com/duke-git/lancet/v2/function"
+import "github.com/duke-git/lancet/function"
 ```

 #### Function list:
@@ -223,10 +205,10 @@ import "github.com/duke-git/lancet/v2/function"
 - [Watcher](https://github.com/duke-git/lancet/blob/main/docs/function.md#Watcher)


-### Mathutil package implements some functions for math calculation.
+### 6. Mathutil package implements some functions for math calculation.

 ```go
-import "github.com/duke-git/lancet/v2/mathutil"
+import "github.com/duke-git/lancet/mathutil"
 ```

 #### Function list:
@@ -239,19 +221,22 @@ import "github.com/duke-git/lancet/v2/mathutil"
 - [TruncRound](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#TruncRound)


-### Netutil package contains functions to get net information and send http request.
+### 7. Netutil package contains functions to get net information and send http request.

 ```go
-import "github.com/duke-git/lancet/v2/netutil"
+import "github.com/duke-git/lancet/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.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.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)
@@ -259,10 +244,10 @@ import "github.com/duke-git/lancet/v2/netutil"
 - [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)

-### Random package implements some basic functions to generate random int and string.
+### 8. Random package implements some basic functions to generate random int and string.

 ```go
-import "github.com/duke-git/lancet/v2/random"
+import "github.com/duke-git/lancet/random"
 ```

 #### Function list:
@@ -271,10 +256,10 @@ import "github.com/duke-git/lancet/v2/random"
 - [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)

-### Retry package is for executing a function repeatedly until it was successful or canceled by the context.
+### 9. 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"
+import "github.com/duke-git/lancet/retry"
 ```

 #### Function list:
@@ -284,13 +269,14 @@ import "github.com/duke-git/lancet/v2/retry"
 - [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)

-### Slice contains some functions to manipulate slice.
+### 10. Slice contains some functions to manipulate slice.

 ```go
-import "github.com/duke-git/lancet/v2/slice"
+import "github.com/duke-git/lancet/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)
@@ -299,35 +285,42 @@ import "github.com/duke-git/lancet/v2/slice"
 - [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)
+- [DeleteByIndex](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DeleteByIndex)
 - [Drop](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Drop)
 - [Every](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Every)
+- [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)
 - [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)
- [FlattenDeep](#FlattenDeep)
+- [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)
 - [IntSlice](https://github.com/duke-git/lancet/blob/main/docs/slice.md#IntSlice)
+- [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)
 - [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)
+- [InsertByIndex](https://github.com/duke-git/lancet/blob/main/docs/slice.md#InsertByIndex)
 - [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)
+- [ReverseSlice](https://github.com/duke-git/lancet/blob/main/docs/slice.md#ReverseSlice)
 - [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)
+- [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#ToSlice)
 - [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)
+- [UpdateByIndex](https://github.com/duke-git/lancet/blob/main/docs/slice.md#UpdateByIndex)
 - [Without](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Without)

-### Strutil package contains some functions to manipulate string.
+### 11. Strutil package contains some functions to manipulate string.
+
 ```go
-import "github.com/duke-git/lancet/v2/strutil"
+import "github.com/duke-git/lancet/strutil"
 ```

 #### Function list:
@@ -346,14 +339,16 @@ import "github.com/duke-git/lancet/v2/strutil"
 - [PadStart](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#PadStart)
 - [ReverseStr](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#ReverseStr)
 - [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)
  
-### System package contain some functions about os, runtime, shell command.
+### 12. System package contain some functions about os, runtime, shell command.

 ```go
-import "github.com/duke-git/lancet/v2/system"
+import "github.com/duke-git/lancet/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)
@@ -363,13 +358,13 @@ import "github.com/duke-git/lancet/v2/system"
 - [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)

-### Validator package contains some functions for data validation.
+### 13. Validator package contains some functions for data validation.

 ```go
-import "github.com/duke-git/lancet/v2/validator"
+import "github.com/duke-git/lancet/validator"
 ```
-
 #### Function list:

 - [ContainChinese](https://github.com/duke-git/lancet/blob/main/docs/validator.md#ContainChinese)
@@ -398,13 +393,6 @@ import "github.com/duke-git/lancet/v2/validator"
 - [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)
-### xerror package implements helpers for errors.
-
-```go
-import "github.com/duke-git/lancet/v2/xerror"
-```
-#### Function list:
- [Unwrap](https://github.com/duke-git/lancet/blob/main/docs/xerror.md#Unwrap)
  

 ## How to Contribute
@@ -415,4 +403,4 @@ I really appreciate any code commits which make lancet lib powerful. Please foll
 2. Create your feature branch.
 3. Commit your changes.
 4. Push to the branch
-5. Create new pull request.
+5. Create new pull request.
--- a/README_zh-CN.md
+++ b/README_zh-CN.md
@@ -3,10 +3,10 @@

 <br/>

-![Go version](https://img.shields.io/badge/go-%3E%3D1.16<recommend>-9cf)
-[![Release](https://img.shields.io/badge/release-2.0.0-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)
+![Go version](https://img.shields.io/badge/go-v1.16-9cf)
+[![Release](https://img.shields.io/badge/release-1.3.1-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)
 [![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/main/LICENSE)
@@ -24,21 +24,14 @@
 ## 特性

 - 👏 全面、高效、可复用
- 💪 250+常用go工具函数，支持string、slice、datetime、net、crypt...
+- 💪 200+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/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v1.2.6。</b>
-```go
-go get github.com/duke-git/lancet@v1.2.6 // 使用go1.18以下版本, 必须安装v1.x.x版本
+go get github.com/duke-git/lancet
 ```

 ## 用法
@@ -46,7 +39,7 @@ go get github.com/duke-git/lancet@v1.2.6 // 使用go1.18以下版本, 必须安
 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/v2/strutil"
+import "github.com/duke-git/lancet/strutil"
 ```

 ## 例子
@@ -69,30 +62,10 @@ func main() {
 ```

 ## API文档
-
-### algorithm算法包实现一些基本算法。eg. sort, search.
+### 1. 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/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)
-
-### 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"
+import "github.com/duke-git/lancet/convertor"
 ```
 #### 函数列表:
 - [ColorHexToRGB](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ColorHexToRGB)
@@ -100,15 +73,16 @@ import "github.com/duke-git/lancet/v2/convertor"
 - [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)
 - [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)
 - [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)
  
-### 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。
+### 2. 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"
+import "github.com/duke-git/lancet/cryptor"
 ```

 #### 函数列表:
@@ -145,11 +119,11 @@ import "github.com/duke-git/lancet/v2/cryptor"
 - [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)

-### datetime日期时间处理包，格式化日期，比较日期。
+### 3. datetime日期时间处理包，格式化日期，比较日期。


 ```go
-import "github.com/duke-git/lancet/v2/datetime"
+import "github.com/duke-git/lancet/datetime"
 ```
 #### 函数列表:
 - [AddDay](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#AddDay)
@@ -174,17 +148,25 @@ import "github.com/duke-git/lancet/v2/datetime"
 - [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)
-
-### fileutil包支持文件基本操作。
+- [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. fileutil包支持文件基本操作。

 ```go
-import "github.com/duke-git/lancet/v2/fileutil"
+import "github.com/duke-git/lancet/fileutil"
 ```

 #### 函数列表：

 - [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)
@@ -198,10 +180,10 @@ import "github.com/duke-git/lancet/v2/fileutil"
 - [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)

-### formatter格式化器包含一些数据格式化处理方法。
+### 5. 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/v2/formatter"
+import "github.com/duke-git/lancet/formatter"
 ```
 #### 函数列表:
 - [Comma](https://github.com/duke-git/lancet/blob/main/docs/formatter_zh-CN.md#Comma)
@@ -210,7 +192,7 @@ import "github.com/duke-git/lancet/v2/formatter"
 ### 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"
+import "github.com/duke-git/lancet/function"
 ```

 #### 函数列表:
@@ -222,10 +204,10 @@ import "github.com/duke-git/lancet/v2/function"
 - [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)

-### mathutil包实现了一些数学计算的函数。
+### 6. mathutil包实现了一些数学计算的函数。

 ```go
-import "github.com/duke-git/lancet/v2/mathutil"
+import "github.com/duke-git/lancet/mathutil"
 ```

 #### Function list:
@@ -237,19 +219,22 @@ import "github.com/duke-git/lancet/v2/mathutil"
 - [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)

-### netutil网络包支持获取ip地址，发送http请求。
+### 7. netutil网络包支持获取ip地址，发送http请求。

 ```go
-import "github.com/duke-git/lancet/v2/netutil"
+import "github.com/duke-git/lancet/netutil"
 ```

 #### 函数列表:
 - [ConvertMapToQueryString](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.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_zh-CN.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_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)
@@ -257,10 +242,10 @@ import "github.com/duke-git/lancet/v2/netutil"
 - [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)

-### random随机数生成器包，可以生成随机[]bytes, int, string。
+### 8. 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"
+import "github.com/duke-git/lancet/random"
 ```

 #### 函数列表:
@@ -268,10 +253,10 @@ import "github.com/duke-git/lancet/v2/random"
 - [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)
-### retry重试执行函数直到函数运行成功或被context cancel。
+### 9. 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"
+import "github.com/duke-git/lancet/retry"
 ```

 #### 函数列表:
@@ -282,13 +267,14 @@ import "github.com/duke-git/lancet/v2/retry"
 - [RetryTimes](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#RetryTimes)


-### slice包包含操作切片的方法集合。
+### 10. slice包包含操作切片的方法集合。

 ```go
-import "github.com/duke-git/lancet/v2/slice"
+import "github.com/duke-git/lancet/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)
@@ -297,37 +283,43 @@ import "github.com/duke-git/lancet/v2/slice"
 - [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)
+- [DeleteByIndex](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#DeleteByIndex)
 - [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)
+- [Equal](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Equal)
+- [EqualWith](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#EqualWith)
 - [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)
- [FlattenDeep](#FlattenDeep)
+- [FlattenDeep](https://github.com/duke-git/lancet/blob/main/docs/slice.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)
 - [IntSlice](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#IntSlice)
+- [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)
 - [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)
+- [InsertByIndex](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#InsertByIndex)
 - [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)
+- [ReverseSlice](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#ReverseSlice)
 - [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)
+- [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#ToSlice)
 - [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)
+- [UpdateByIndex](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#UpdateByIndex)
 - [Without](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Without)


-### strutil包含处理字符串的相关函数。
+### 12. strutil包含处理字符串的相关函数。

 ```go
-import "github.com/duke-git/lancet/v2/strutil"
+import "github.com/duke-git/lancet/strutil"
 ```

 #### 函数列表:
@@ -346,14 +338,15 @@ import "github.com/duke-git/lancet/v2/strutil"
 - [PadStart](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#PadStart)
 - [ReverseStr](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#ReverseStr)
 - [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)
  

-### system包含os, runtime, shell command相关函数。
+### 13. system包含os, runtime, shell command相关函数。

 ```go
-import "github.com/duke-git/lancet/v2/system"
+import "github.com/duke-git/lancet/system"
 ```

 #### 函数列表:
@@ -365,11 +358,12 @@ import "github.com/duke-git/lancet/v2/system"
 - [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)

-### validator验证器包，包含常用字符串格式验证函数。
+### 14. 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/v2/validator"
+import "github.com/duke-git/lancet/validator"
 ```
 #### 函数列表:

@@ -400,14 +394,6 @@ import "github.com/duke-git/lancet/v2/validator"
 - [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)

-validator.md#IsWeakPassword)
-### xerror包实现一些错误处理函数
-
-```go
-import "github.com/duke-git/lancet/v2/xerror"
-```
-#### 函数列表:
- [Unwrap](https://github.com/duke-git/lancet/blob/main/docs/xerror_zh-CN.md#Unwrap)

 ## 如何贡献代码

@@ -417,4 +403,4 @@ import "github.com/duke-git/lancet/v2/xerror"
 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。
+5. 创建新的pull request。
--- a/algorithm/lru_cache.go
+++ b/algorithm/lru_cache.go
@@ -1,102 +0,0 @@
-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)
-}
--- a/algorithm/lru_cache_test.go
+++ b/algorithm/lru_cache_test.go
@@ -1,36 +0,0 @@
-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)
-}
--- a/algorithm/search.go
+++ b/algorithm/search.go
@@ -1,63 +0,0 @@
-// 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
-}
--- a/algorithm/search_test.go
+++ b/algorithm/search_test.go
@@ -1,33 +0,0 @@
-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))
-}
--- a/algorithm/sorter.go
+++ b/algorithm/sorter.go
@@ -1,208 +0,0 @@
-// 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) []T {
-	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)
-			}
-		}
-	}
-	return slice
-}
-
-// InsertionSort use insertion to sort slice.
-func InsertionSort[T any](slice []T, comparator lancetconstraints.Comparator) []T {
-	size := len(slice)
-	if size <= 1 {
-		return slice
-	}
-
-	for i := 1; i < size; i++ {
-		currentItem := slice[i]
-		preIndex := i - 1
-		preItem := slice[preIndex]
-
-		isPreLessThanCurrent := comparator.Compare(preItem, currentItem) == -1
-		for preIndex >= 0 && isPreLessThanCurrent {
-			slice[preIndex+1] = slice[preIndex]
-			preIndex--
-		}
-
-		slice[preIndex+1] = preItem
-	}
-
-	return slice
-}
-
-// SelectionSort use selection to sort slice.
-func SelectionSort[T any](slice []T, comparator lancetconstraints.Comparator) []T {
-	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)
-	}
-	return slice
-}
-
-// ShellSort shell sort slice.
-func ShellSort[T any](slice []T, comparator lancetconstraints.Comparator) []T {
-	size := len(slice)
-	if size <= 1 {
-		return 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 /= 3
-	}
-
-	return slice
-}
-
-// QuickSort quick sorting for slice, lowIndex is 0 and highIndex is len(slice)-1
-func QuickSort[T any](slice []T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) []T {
-	if lowIndex < highIndex {
-		p := partition(slice, lowIndex, highIndex, comparator)
-		QuickSort(slice, lowIndex, p-1, comparator)
-		QuickSort(slice, p+1, highIndex, comparator)
-	}
-
-	return slice
-}
-
-// 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) []T {
-	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)
-	}
-
-	return slice
-}
-
-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, lowIndex, highIndex int, comparator lancetconstraints.Comparator) []T {
-	if lowIndex < highIndex {
-		mid := (lowIndex + highIndex) / 2
-		MergeSort(slice, lowIndex, mid, comparator)
-		MergeSort(slice, mid+1, highIndex, comparator)
-		merge(slice, lowIndex, mid, highIndex, comparator)
-	}
-
-	return slice
-}
-
-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]
-}
--- a/algorithm/sorter_test.go
+++ b/algorithm/sorter_test.go
@@ -1,177 +0,0 @@
-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
-
-	//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},
-}
-
-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 intSlice = []int{2, 1, 5, 3, 6, 4}
-
-func TestBubbleSortForStructSlice(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestBubbleSortForStructSlice")
-
-	comparator := &peopleAgeComparator{}
-	sortedPeopleByAge := BubbleSort(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)
-}
-
-func TestBubbleSortForIntSlice(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestBubbleSortForIntSlice")
-
-	comparator := &intComparator{}
-	sortedInt := BubbleSort(intSlice, comparator)
-	expected := []int{1, 2, 3, 4, 5, 6}
-
-	asssert.Equal(expected, sortedInt)
-}
-
-func TestInsertionSort(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestInsertionSort")
-
-	comparator := &peopleAgeComparator{}
-	sortedPeopleByAge := SelectionSort(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)
-}
-
-func TestSelectionSort(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestSelectionSort")
-
-	comparator := &peopleAgeComparator{}
-	sortedPeopleByAge := SelectionSort(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)
-}
-
-func TestShellSort(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestShellSort")
-
-	comparator := &peopleAgeComparator{}
-	sortedPeopleByAge := ShellSort(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)
-}
-
-func TestQuickSort(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestQuickSort")
-
-	comparator := &peopleAgeComparator{}
-	sortedPeopleByAge := QuickSort(peoples, 0, len(peoples)-1, comparator)
-	t.Log(sortedPeopleByAge)
-
-	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
-	actual := fmt.Sprintf("%v", sortedPeopleByAge)
-
-	asssert.Equal(expected, actual)
-}
-
-func TestHeapSort(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestHeapSort")
-
-	comparator := &peopleAgeComparator{}
-	sortedPeopleByAge := HeapSort(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)
-}
-
-func TestMergeSort(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestMergeSort")
-
-	comparator := &peopleAgeComparator{}
-	sortedPeopleByAge := MergeSort(peoples, 0, len(peoples)-1, comparator)
-	t.Log(sortedPeopleByAge)
-
-	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
-	actual := fmt.Sprintf("%v", sortedPeopleByAge)
-
-	asssert.Equal(expected, actual)
-}
-
-func TestCountSort(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestCountSort")
-
-	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)
-}
--- a/convertor/convertor.go
+++ b/convertor/convertor.go
@@ -6,9 +6,10 @@ package convertor

 import (
 	"bytes"
-	"encoding/gob"
+	"encoding/binary"
 	"encoding/json"
 	"fmt"
+	"math"
 	"reflect"
 	"regexp"
 	"strconv"
@@ -21,14 +22,44 @@ func ToBool(s string) (bool, error) {
 }

 // ToBytes convert interface to bytes
-func ToBytes(data any) ([]byte, error) {
-	var buf bytes.Buffer
-	enc := gob.NewEncoder(&buf)
-	err := enc.Encode(data)
-	if err != nil {
-		return nil, err
+func ToBytes(value interface{}) ([]byte, error) {
+	v := reflect.ValueOf(value)
+
+	switch value.(type) {
+	case int, int8, int16, int32, int64:
+		number := v.Int()
+		buf := bytes.NewBuffer([]byte{})
+		buf.Reset()
+		err := binary.Write(buf, binary.BigEndian, number)
+		return buf.Bytes(), err
+	case uint, uint8, uint16, uint32, uint64:
+		number := v.Uint()
+		buf := bytes.NewBuffer([]byte{})
+		buf.Reset()
+		err := binary.Write(buf, binary.BigEndian, number)
+		return buf.Bytes(), err
+	case float32:
+		number := float32(v.Float())
+		bits := math.Float32bits(number)
+		bytes := make([]byte, 4)
+		binary.BigEndian.PutUint32(bytes, bits)
+		return bytes, nil
+	case float64:
+		number := v.Float()
+		bits := math.Float64bits(number)
+		bytes := make([]byte, 8)
+		binary.BigEndian.PutUint64(bytes, bits)
+		return bytes, nil
+	case bool:
+		return strconv.AppendBool([]byte{}, v.Bool()), nil
+	case string:
+		return []byte(v.String()), nil
+	case []byte:
+		return v.Bytes(), nil
+	default:
+		newValue, err := json.Marshal(value)
+		return newValue, err
 	}
-	return buf.Bytes(), nil
 }

 // ToChar convert string to char slice
@@ -44,7 +75,7 @@ func ToChar(s string) []string {
 }

 // ToString convert value to string
-func ToString(value any) string {
+func ToString(value interface{}) string {
 	res := ""
 	if value == nil {
 		return res
@@ -76,7 +107,7 @@ func ToString(value any) string {
 }

 // ToJson convert value to a valid json string
-func ToJson(value any) (string, error) {
+func ToJson(value interface{}) (string, error) {
 	res, err := json.Marshal(value)
 	if err != nil {
 		return "", err
@@ -86,7 +117,7 @@ func ToJson(value any) (string, error) {
 }

 // ToFloat convert value to a float64, if input is not a float return 0.0 and error
-func ToFloat(value any) (float64, error) {
+func ToFloat(value interface{}) (float64, error) {
 	v := reflect.ValueOf(value)

 	res := 0.0
@@ -113,7 +144,7 @@ func ToFloat(value any) (float64, error) {
 }

 // ToInt convert value to a int64, if input is not a numeric format return 0 and error
-func ToInt(value any) (int64, error) {
+func ToInt(value interface{}) (int64, error) {
 	v := reflect.ValueOf(value)

 	var res int64
@@ -141,7 +172,7 @@ func ToInt(value any) (int64, error) {

 // StructToMap convert struct to map, only convert exported struct field
 // map key is specified same as struct field tag `json` value
-func StructToMap(value any) (map[string]any, error) {
+func StructToMap(value interface{}) (map[string]interface{}, error) {
 	v := reflect.ValueOf(value)
 	t := reflect.TypeOf(value)

@@ -152,7 +183,7 @@ func StructToMap(value any) (map[string]any, error) {
 		return nil, fmt.Errorf("data type %T not support, shuld be struct or pointer to struct", value)
 	}

-	res := make(map[string]any)
+	res := make(map[string]interface{})

 	fieldNum := t.NumField()
 	pattern := `^[A-Z]`
@@ -198,3 +229,17 @@ 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
+}
--- a/convertor/convertor_test.go
+++ b/convertor/convertor_test.go
@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"testing"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestToChar(t *testing.T) {
@@ -36,26 +36,33 @@ func TestToBool(t *testing.T) {
 func TestToBytes(t *testing.T) {
 	assert := internal.NewAssert(t, "TestToBytes")

-	cases := []any{
+	cases := []interface{}{
 		0,
 		false,
 		"1",
 	}
 	expected := [][]byte{
-		{3, 4, 0, 0},
-		{3, 2, 0, 0},
-		{4, 12, 0, 1, 49},
+		{0, 0, 0, 0, 0, 0, 0, 0},
+		{102, 97, 108, 115, 101},
+		{49},
 	}
 	for i := 0; i < len(cases); i++ {
 		actual, _ := ToBytes(cases[i])
 		assert.Equal(expected[i], actual)
 	}
+
+	bytesData, err := ToBytes("abc")
+	if err != nil {
+		t.Error(err)
+		t.Fail()
+	}
+	assert.Equal("abc", ToString(bytesData))
 }

 func TestToInt(t *testing.T) {
 	assert := internal.NewAssert(t, "TestToInt")

-	cases := []any{"123", "-123", 123,
+	cases := []interface{}{"123", "-123", 123,
 		uint(123), uint8(123), uint16(123), uint32(123), uint64(123),
 		float32(12.3), float64(12.3),
 		"abc", false, "111111111111111111111111111111111111111"}
@@ -71,7 +78,7 @@ func TestToInt(t *testing.T) {
 func TestToFloat(t *testing.T) {
 	assert := internal.NewAssert(t, "TestToFloat")

-	cases := []any{
+	cases := []interface{}{
 		"", "-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),
@@ -99,7 +106,7 @@ func TestToString(t *testing.T) {
 	}
 	aStruct := TestStruct{Name: "TestStruct"}

-	cases := []any{
+	cases := []interface{}{
 		"", nil,
 		int(0), int8(1), int16(-1), int32(123), int64(123),
 		uint(123), uint8(123), uint16(123), uint32(123), uint64(123),
@@ -147,7 +154,7 @@ func TestStructToMap(t *testing.T) {
 		100,
 	}
 	pm, _ := StructToMap(p)
-	var expected = map[string]any{"name": "test"}
+	var expected = map[string]interface{}{"name": "test"}
 	assert.Equal(expected, pm)
 }

@@ -171,3 +178,20 @@ func TestColorRGBToHex(t *testing.T) {
 	assert := internal.NewAssert(t, "TestColorRGBToHex")
 	assert.Equal(expected, colorHex)
 }
+
+func TestToChannel(t *testing.T) {
+	assert := internal.NewAssert(t, "TestToChannel")
+
+	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)
+}
--- a/cryptor/aes.go
+++ b/cryptor/aes.go
@@ -54,14 +54,18 @@ func AesEcbDecrypt(encrypted, key []byte) []byte {
 // AesCbcEncrypt encrypt data with key use AES CBC algorithm
 // len(key) should be 16, 24 or 32
 func AesCbcEncrypt(data, key []byte) []byte {
-	// len(key) should be 16, 24 or 32
 	block, _ := aes.NewCipher(key)
-	blockSize := block.BlockSize()
-	data = pkcs7Padding(data, blockSize)
-	blockMode := cipher.NewCBCEncrypter(block, key[:blockSize])
+	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)

-	encrypted := make([]byte, len(data))
-	blockMode.CryptBlocks(encrypted, data)
 	return encrypted
 }

@@ -69,12 +73,14 @@ func AesCbcEncrypt(data, key []byte) []byte {
 // len(key) should be 16, 24 or 32
 func AesCbcDecrypt(encrypted, key []byte) []byte {
 	block, _ := aes.NewCipher(key)
-	blockSize := block.BlockSize()
-	blockMode := cipher.NewCBCDecrypter(block, key[:blockSize])

-	decrypted := make([]byte, len(encrypted))
-	blockMode.CryptBlocks(decrypted, encrypted)
-	decrypted = pkcs7UnPadding(decrypted)
+	iv := encrypted[:aes.BlockSize]
+	encrypted = encrypted[aes.BlockSize:]
+
+	mode := cipher.NewCBCDecrypter(block, iv)
+	mode.CryptBlocks(encrypted, encrypted)
+
+	decrypted := pkcs7UnPadding(encrypted)
 	return decrypted
 }

--- a/cryptor/aes_test.go
+++ b/cryptor/aes_test.go
@@ -3,7 +3,7 @@ package cryptor
 import (
 	"testing"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestAesEcbEncrypt(t *testing.T) {
--- a/cryptor/basic_test.go
+++ b/cryptor/basic_test.go
@@ -3,7 +3,7 @@ package cryptor
 import (
 	"testing"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestBase64StdEncode(t *testing.T) {
--- a/cryptor/des.go
+++ b/cryptor/des.go
@@ -55,12 +55,16 @@ func DesEcbDecrypt(encrypted, key []byte) []byte {
 // len(key) should be 8
 func DesCbcEncrypt(data, key []byte) []byte {
 	block, _ := des.NewCipher(key)
-	blockSize := block.BlockSize()
-	data = pkcs7Padding(data, blockSize)
-	blockMode := cipher.NewCBCEncrypter(block, key[:blockSize])
+	data = pkcs7Padding(data, block.BlockSize())

-	encrypted := make([]byte, len(data))
-	blockMode.CryptBlocks(encrypted, data)
+	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
 }
@@ -69,13 +73,14 @@ func DesCbcEncrypt(data, key []byte) []byte {
 // len(key) should be 8
 func DesCbcDecrypt(encrypted, key []byte) []byte {
 	block, _ := des.NewCipher(key)
-	blockSize := block.BlockSize()
-	blockMode := cipher.NewCBCDecrypter(block, key[:blockSize])

-	decrypted := make([]byte, len(encrypted))
-	blockMode.CryptBlocks(decrypted, encrypted)
-	decrypted = pkcs7UnPadding(decrypted)
+	iv := encrypted[:des.BlockSize]
+	encrypted = encrypted[des.BlockSize:]

+	mode := cipher.NewCBCDecrypter(block, iv)
+	mode.CryptBlocks(encrypted, encrypted)
+
+	decrypted := pkcs7UnPadding(encrypted)
 	return decrypted
 }

--- a/cryptor/des_test.go
+++ b/cryptor/des_test.go
@@ -3,7 +3,7 @@ package cryptor
 import (
 	"testing"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestDesEcbEncrypt(t *testing.T) {
--- a/cryptor/rsa_test.go
+++ b/cryptor/rsa_test.go
@@ -3,7 +3,7 @@ package cryptor
 import (
 	"testing"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestRsaEncrypt(t *testing.T) {
--- a/datastructure/link/doublylink.go
+++ b/datastructure/link/doublylink.go
@@ -1,241 +0,0 @@
-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 {
-	res := []T{}
-	current := link.Head
-	for current != nil {
-		res = append(res, current.Value)
-		current = current.Next
-	}
-	return res
-}
-
-// 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 checks if link is empty or not
-func (link *DoublyLink[T]) Clear() {
-	link.Head = nil
-	link.length = 0
-}
--- a/datastructure/link/doublylink_test.go
+++ b/datastructure/link/doublylink_test.go
@@ -1,182 +0,0 @@
-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)
-
-	err = link.InsertAt(0, 1)
-	err = link.InsertAt(1, 2)
-	err = link.InsertAt(2, 4)
-	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 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())
-}
--- a/datastructure/link/singlylink.go
+++ b/datastructure/link/singlylink.go
@@ -1,224 +0,0 @@
-package datastructure
-
-import (
-	"errors"
-	"fmt"
-
-	"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")
-}
-
-// 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 {
-	res := []T{}
-	current := link.Head
-	for current != nil {
-		res = append(res, current.Value)
-		current = current.Next
-	}
-	return res
-}
-
-// IsEmpty checks if link is empty or not
-func (link *SinglyLink[T]) IsEmpty() bool {
-	return link.length == 0
-}
-
-// Clear checks if link is empty or not
-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)
-}
--- a/datastructure/link/singlylink_test.go
+++ b/datastructure/link/singlylink_test.go
@@ -1,182 +0,0 @@
-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)
-	err = link.InsertAt(1, 2)
-	err = link.InsertAt(2, 4)
-	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_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())
-}
--- a/datastructure/list/list.go
+++ b/datastructure/list/list.go
@@ -1,245 +0,0 @@
-// 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 reture 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
-}
-
-// 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
-}
-
-// 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:]...)...)
-}
-
-// Equtal compare list to other list, use reflect.DeepEqual
-func (l *List[T]) Equtal(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)
-}
-
-// 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] {
-	res := NewList([]T{})
-
-	res.data = append(res.data, l.data...)
-	res.data = append(res.data, other.data...)
-	res.Unique()
-
-	return res
-}
-
-// 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] {
-	res := NewList(make([]T, 0, 0))
-
-	for _, v := range l.data {
-		if other.Contain(v) {
-			res.data = append(res.data, v)
-		}
-	}
-
-	return res
-}
--- a/datastructure/list/list_test.go
+++ b/datastructure/list/list_test.go
@@ -1,272 +0,0 @@
-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 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{})
-	v, 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{})
-	v, 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 TestEqutal(t *testing.T) {
-	assert := internal.NewAssert(t, "TestEqutal")
-
-	list1 := NewList([]int{1, 2, 3, 4})
-	list2 := NewList([]int{1, 2, 3, 4})
-	list3 := NewList([]int{1, 2, 3})
-
-	assert.Equal(true, list1.Equtal(list2))
-	assert.Equal(false, list1.Equtal(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.Equtal(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.Equtal(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 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.Equtal(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.Equtal(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.Equtal(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.Equtal(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.Equtal(list3))
-}
--- a/datastructure/node.go
+++ b/datastructure/node.go
@@ -1,47 +0,0 @@
-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 {
-	Data  T
-	Left  *TreeNode[T]
-	Right *TreeNode[T]
-}
-
-// NewTreeNode return a TreeNode pointer
-func NewTreeNode[T any](data T) *TreeNode[T] {
-	return &TreeNode[T]{data, nil, nil}
-}
--- a/datastructure/queue/arrayqueue.go
+++ b/datastructure/queue/arrayqueue.go
@@ -1,92 +0,0 @@
-package datastructure
-
-import (
-	"errors"
-	"fmt"
-	"reflect"
-)
-
-// ArrayQueue implements queue with slice
-type ArrayQueue[T any] struct {
-	data   []T
-	length int
-}
-
-// NewArrayQueue return a empty ArrayQueue pointer
-func NewArrayQueue[T any](values ...T) *ArrayQueue[T] {
-	data := make([]T, len(values))
-	for i, v := range values {
-		data[i] = v
-	}
-	return &ArrayQueue[T]{data: data, length: len(values)}
-}
-
-// Data return queue data
-func (q *ArrayQueue[T]) Data() []T {
-	return q.data
-}
-
-// Size return length of queue data
-func (q *ArrayQueue[T]) Size() int {
-	return q.length
-}
-
-// IsEmpty checks if queue is empty or not
-func (q *ArrayQueue[T]) IsEmpty() bool {
-	return q.length == 0
-}
-
-// Front return front value of queue
-func (q *ArrayQueue[T]) Front() T {
-	return q.data[0]
-}
-
-// Back return back value of queue
-func (q *ArrayQueue[T]) Back() T {
-	return q.data[q.length-1]
-}
-
-// EnQueue put element into queue
-func (q *ArrayQueue[T]) EnQueue(value T) {
-	q.data = append(q.data, value)
-	q.length++
-}
-
-// DeQueue remove head element of queue and return it, if queue is empty, return nil and error
-func (q *ArrayQueue[T]) DeQueue() (*T, error) {
-	if q.IsEmpty() {
-		return nil, errors.New("queue is empty")
-	}
-
-	headItem := q.data[0]
-	q.data = q.data[1:]
-	q.length--
-
-	return &headItem, nil
-}
-
-// Clear the queue data
-func (q *ArrayQueue[T]) Clear() {
-	q.data = []T{}
-	q.length = 0
-}
-
-// Contain checks if the value is in queue or not
-func (q *ArrayQueue[T]) Contain(value T) bool {
-	for _, v := range q.data {
-		if reflect.DeepEqual(v, value) {
-			return true
-		}
-	}
-	return false
-}
-
-// Print queue data
-func (q *ArrayQueue[T]) Print() {
-	info := "["
-	for _, v := range q.data {
-		info += fmt.Sprintf("%+v, ", v)
-	}
-	info += "]"
-	fmt.Println(info)
-}
--- a/datastructure/queue/arrayqueue_test.go
+++ b/datastructure/queue/arrayqueue_test.go
@@ -1,90 +0,0 @@
-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]()
-	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(1, 2, 3)
-
-	val, err := queue.DeQueue()
-	if err != nil {
-		t.Fail()
-	}
-
-	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(1, 2, 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(1, 2, 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(1, 2, 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]()
-	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())
-}
--- a/datastructure/queue/circularqueue.go
+++ b/datastructure/queue/circularqueue.go
@@ -1,118 +0,0 @@
-package datastructure
-
-import (
-	"errors"
-	"fmt"
-	"reflect"
-)
-
-// CircularQueue implements circular queue with slice,
-// last index of CircularQueue don't contain value, so acturl capacity is size - 1
-type CircularQueue[T any] struct {
-	data  []T
-	front int
-	rear  int
-	size  int
-}
-
-// NewCircularQueue return a empty CircularQueue pointer
-func NewCircularQueue[T any](size int) *CircularQueue[T] {
-	data := make([]T, size)
-	return &CircularQueue[T]{data: data, front: 0, rear: 0, size: size}
-}
-
-// Data return 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
-}
-
-// Length return current data length of queue
-func (q *CircularQueue[T]) Length() int {
-	if q.size == 0 {
-		return 0
-	}
-	return (q.rear - q.front + q.size) % q.size
-}
-
-// 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.size == 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.size-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.size
-
-	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.size
-
-	return &headItem, nil
-}
-
-// Clear the queue data
-func (q *CircularQueue[T]) Clear() {
-	q.data = []T{}
-	q.front = 0
-	q.rear = 0
-	q.size = 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)
-}
--- a/datastructure/queue/circularqueue_test.go
+++ b/datastructure/queue/circularqueue_test.go
@@ -1,148 +0,0 @@
-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.Length())
-
-	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.Length())
-}
-
-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.Length())
-
-	queue.EnQueue(1)
-	assert.Equal(false, queue.IsEmpty())
-	assert.Equal(1, queue.Length())
-
-	queue.Clear()
-	assert.Equal(true, queue.IsEmpty())
-	assert.Equal(0, queue.Length())
-}
-
-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())
-
-}
--- a/datastructure/queue/linkedqueue.go
+++ b/datastructure/queue/linkedqueue.go
@@ -1,104 +0,0 @@
-package datastructure
-
-import (
-	"errors"
-	"fmt"
-
-	"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 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 add 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)
-}
--- a/datastructure/queue/linkedqueue_test.go
+++ b/datastructure/queue/linkedqueue_test.go
@@ -1,84 +0,0 @@
-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]()
-	val, 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]()
-	val, 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())
-}
--- a/datastructure/set/set.go
+++ b/datastructure/set/set.go
@@ -1,105 +0,0 @@
-package datastructure
-
-// Set is a data container, like slice, but element of set is not duplicate
-type Set[T comparable] map[T]bool
-
-// 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] = true
-	}
-}
-
-// Contain checks if set contains value or not
-func (s Set[T]) Contain(value T) bool {
-	_, ok := s[value]
-	return ok
-}
-
-// Contain 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
-}
--- a/datastructure/set/set_test.go
+++ b/datastructure/set/set_test.go
@@ -1,129 +0,0 @@
-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)
-}
--- a/datastructure/stack/arraystack.go
+++ b/datastructure/stack/arraystack.go
@@ -1,62 +0,0 @@
-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 then return it
-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
-}
--- a/datastructure/stack/arraystack_test.go
+++ b/datastructure/stack/arraystack_test.go
@@ -1,77 +0,0 @@
-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]()
-	topItem, 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]()
-	topItem, 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())
-}
--- a/datastructure/stack/linkedstack.go
+++ b/datastructure/stack/linkedstack.go
@@ -1,94 +0,0 @@
-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)
-}
--- a/datastructure/stack/linkedstack_test.go
+++ b/datastructure/stack/linkedstack_test.go
@@ -1,80 +0,0 @@
-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]()
-	topItem, 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]()
-	topItem, 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())
-}
--- a/datastructure/tree/bstree.go
+++ b/datastructure/tree/bstree.go
@@ -1,83 +0,0 @@
-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]
-}
-
-// NewBSTree create a BSTree pointer
-func NewBSTree[T any](rootData T) *BSTree[T] {
-	root := datastructure.NewTreeNode(rootData)
-	return &BSTree[T]{root}
-}
-
-// InsertNode insert data into BSTree
-func (t *BSTree[T]) InsertNode(data T, comparator lancetconstraints.Comparator) {
-	root := t.root
-	newNode := datastructure.NewTreeNode(data)
-	if root == nil {
-		t.root = newNode
-	} else {
-		insertTreeNode(root, newNode, comparator)
-	}
-}
-
-// DeletetNode delete data into BSTree
-func (t *BSTree[T]) DeletetNode(data T, comparator lancetconstraints.Comparator) {
-	deleteTreeNode(t.root, data, 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)
-}
-
-// Print the bstree structure
-func (t *BSTree[T]) Print() {
-	maxLevel := t.NodeLevel(t.root)
-	nodes := []*datastructure.TreeNode[T]{t.root}
-	printTreeNodes(nodes, 1, maxLevel)
-}
--- a/datastructure/tree/bstree_test.go
+++ b/datastructure/tree/bstree_test.go
@@ -1,142 +0,0 @@
-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_InsertNode(t *testing.T) {
-	bstree := NewBSTree(6)
-
-	comparator := &intComparator{}
-	bstree.InsertNode(7, comparator)
-	bstree.InsertNode(5, comparator)
-	bstree.InsertNode(2, comparator)
-	bstree.InsertNode(4, comparator)
-
-	bstree.Print()
-}
-
-func TestBSTree_PreOrderTraverse(t *testing.T) {
-	assert := internal.NewAssert(t, "TestBSTree_PreOrderTraverse")
-
-	bstree := NewBSTree(6)
-
-	comparator := &intComparator{}
-	bstree.InsertNode(7, comparator)
-	bstree.InsertNode(5, comparator)
-	bstree.InsertNode(2, comparator)
-	bstree.InsertNode(4, comparator)
-
-	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)
-
-	comparator := &intComparator{}
-	bstree.InsertNode(7, comparator)
-	bstree.InsertNode(5, comparator)
-	bstree.InsertNode(2, comparator)
-	bstree.InsertNode(4, comparator)
-
-	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)
-
-	comparator := &intComparator{}
-	bstree.InsertNode(7, comparator)
-	bstree.InsertNode(5, comparator)
-	bstree.InsertNode(2, comparator)
-	bstree.InsertNode(4, comparator)
-
-	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)
-
-	comparator := &intComparator{}
-	bstree.InsertNode(7, comparator)
-	bstree.InsertNode(5, comparator)
-	bstree.InsertNode(2, comparator)
-	bstree.InsertNode(4, comparator)
-
-	bstree.Print()
-
-	acturl := bstree.LevelOrderTraverse()
-	t.Log(acturl)
-	assert.Equal([]int{6, 5, 7, 2, 4}, acturl)
-}
-
-func TestBSTree_DeletetNode(t *testing.T) {
-	assert := internal.NewAssert(t, "TestBSTree_DeletetNode")
-
-	bstree := NewBSTree(6)
-
-	comparator := &intComparator{}
-	bstree.InsertNode(7, comparator)
-	bstree.InsertNode(5, comparator)
-	bstree.InsertNode(2, comparator)
-	bstree.InsertNode(4, comparator)
-
-	bstree.Print()
-
-	bstree.DeletetNode(4, comparator)
-	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)
-
-	comparator := &intComparator{}
-	bstree.InsertNode(7, comparator)
-	bstree.InsertNode(5, comparator)
-	bstree.InsertNode(2, comparator)
-	bstree.InsertNode(4, comparator)
-
-	bstree.Print()
-
-	assert.Equal(bstree.Depth(), 4)
-}
--- a/datastructure/tree/tree_internal.go
+++ b/datastructure/tree/tree_internal.go
@@ -1,224 +0,0 @@
-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.Data)
-		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.Data)
-	}
-	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.Data)
-		data = append(data, inOrderTraverse(node.Right)...)
-	}
-	return data
-}
-
-func preOrderPrint[T any](node *datastructure.TreeNode[T]) {
-	if node == nil {
-		return
-	}
-
-	fmt.Printf("%v, ", node.Data)
-	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.Data)
-}
-
-func inOrderPrint[T any](node *datastructure.TreeNode[T]) {
-	if node == nil {
-		return
-	}
-
-	inOrderPrint(node.Left)
-	fmt.Printf("%v, ", node.Data)
-	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.Data)
-		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.Data, rootNode.Data) == -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.Data) == -1 {
-		node.Left = deleteTreeNode(node.Left, data, comparator)
-	} else if comparator.Compare(data, node.Data) == 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.Data)
-			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 max(a, b int) int {
-	if a > b {
-		return a
-	}
-	return b
-}
--- a/datetime/conversion.go
+++ b/datetime/conversion.go
@@ -0,0 +1,60 @@
+// Copyright 2021 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license.
+
+package datetime
+
+import "time"
+
+type theTime struct {
+	unix int64
+}
+
+// NewUnixNow return unix timestamp of current time
+func NewUnixNow() *theTime {
+	return &theTime{unix: time.Now().Unix()}
+}
+
+// NewUnix return unix timestamp of specified time
+func NewUnix(unix int64) *theTime {
+	return &theTime{unix: unix}
+}
+
+// NewFormat return unix timestamp of specified time string, t should be "yyyy-mm-dd hh:mm:ss"
+func NewFormat(t string) (*theTime, error) {
+	timeLayout := "2006-01-02 15:04:05"
+	loc := time.FixedZone("CST", 8*3600)
+	tt, err := time.ParseInLocation(timeLayout, t, loc)
+	if err != nil {
+		return nil, err
+	}
+	return &theTime{unix: tt.Unix()}, nil
+}
+
+// NewISO8601 return unix timestamp of specified iso8601 time string
+func NewISO8601(iso8601 string) (*theTime, error) {
+	t, err := time.ParseInLocation(time.RFC3339, iso8601, time.UTC)
+	if err != nil {
+		return nil, err
+	}
+	return &theTime{unix: t.Unix()}, nil
+}
+
+// ToUnix return unix timestamp
+func (t *theTime) ToUnix() int64 {
+	return t.unix
+}
+
+// ToFormat return the time string 'yyyy-mm-dd hh:mm:ss' of unix time
+func (t *theTime) ToFormat() string {
+	return time.Unix(t.unix, 0).Format("2006-01-02 15:04:05")
+}
+
+// ToFormatForTpl return the time string which format is specified tpl
+func (t *theTime) ToFormatForTpl(tpl string) string {
+	return time.Unix(t.unix, 0).Format(tpl)
+}
+
+// ToFormatForTpl return iso8601 time string
+func (t *theTime) ToIso8601() string {
+	return time.Unix(t.unix, 0).Format(time.RFC3339)
+}
--- a/datetime/conversion_test.go
+++ b/datetime/conversion_test.go
@@ -0,0 +1,54 @@
+package datetime
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/internal"
+)
+
+func TestToUnix(t *testing.T) {
+	assert := internal.NewAssert(t, "TestToUnix")
+
+	tm1 := NewUnixNow()
+	unixTimestamp := tm1.ToUnix()
+	tm2 := NewUnix(unixTimestamp)
+
+	assert.Equal(tm1, tm2)
+}
+
+func TestToFormat(t *testing.T) {
+	assert := internal.NewAssert(t, "TestToFormat")
+
+	tm, err := NewFormat("2022/03/18 17:04:05")
+	assert.IsNotNil(err)
+
+	tm, err = NewFormat("2022-03-18 17:04:05")
+	assert.IsNil(err)
+
+	t.Log("ToFormat -> ", tm.ToFormat())
+}
+
+func TestToFormatForTpl(t *testing.T) {
+	assert := internal.NewAssert(t, "TestToFormatForTpl")
+
+	tm, err := NewFormat("2022/03/18 17:04:05")
+	assert.IsNotNil(err)
+
+	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")
+	assert.IsNotNil(err)
+
+	tm, err = NewISO8601("2006-01-02T15:04:05.999Z")
+	assert.IsNil(err)
+
+	t.Log("ToIso8601 -> ", tm.ToIso8601())
+}
--- a/datetime/datetime_test.go
+++ b/datetime/datetime_test.go
@@ -4,7 +4,7 @@ import (
 	"testing"
 	"time"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestAddDay(t *testing.T) {
--- a/docs/algorithm.md
+++ b/docs/algorithm.md
@@ -1,593 +0,0 @@
-# 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/sorter.go](https://github.com/duke-git/lancet/blob/main/algorithm/sorter.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)
- [CountSort](#CountSort)
- [HeapSort](#HeapSort)
- [InsertionSort](#InsertionSort)
- [MergeSort](#MergeSort)
- [QuickSort](#QuickSort)
- [SelectionSort](#SelectionSort)
- [ShellSort](#ShellSort)
- [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) []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.BubbleSort(intSlice, comparator)
-
-    fmt.Println(sortedSlice) //[]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) []T
-```
-<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{}
-    sortedPeople := algorithm.InsertionSort(peoples, comparator)
-
-    fmt.Println(sortedSlice) //[{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) []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.SelectionSort(intSlice, comparator)
-
-    fmt.Println(sortedSlice) //[]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) []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.ShellSort(intSlice, comparator)
-
-    fmt.Println(sortedSlice) //[]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, lowIndex, highIndex int, 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.QuickSort(intSlice, 0, len(intSlice)-1, comparator)
-
-    fmt.Println(sortedSlice) //[]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) []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.HeapSort(intSlice, comparator)
-
-    fmt.Println(sortedSlice) //[]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, lowIndex, highIndex int, 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.MergeSort(intSlice, 0, len(intSlice)-1, comparator)
-
-    fmt.Println(sortedSlice) //[]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
-
-}
-```
--- a/docs/algorithm_zh-CN.md
+++ b/docs/algorithm_zh-CN.md
@@ -1,593 +0,0 @@
-# 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/sorter.go](https://github.com/duke-git/lancet/blob/main/algorithm/sorter.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)
- [CountSort](#CountSort)
- [HeapSort](#HeapSort)
- [InsertionSort](#InsertionSort)
- [MergeSort](#MergeSort)
- [QuickSort](#QuickSort)
- [SelectionSort](#SelectionSort)
- [ShellSort](#ShellSort)
- [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) []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.BubbleSort(intSlice, comparator)
-
-    fmt.Println(sortedSlice) //[]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) []T
-```
-<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{}
-    sortedPeople := algorithm.InsertionSort(peoples, comparator)
-
-    fmt.Println(sortedSlice) //[{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) []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.SelectionSort(intSlice, comparator)
-
-    fmt.Println(sortedSlice) //[]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) []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.ShellSort(intSlice, comparator)
-
-    fmt.Println(sortedSlice) //[]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, lowIndex, highIndex int, 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.QuickSort(intSlice, 0, len(intSlice)-1, comparator)
-
-    fmt.Println(sortedSlice) //[]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{}
-    sortedSlice := algorithm.HeapSort(intSlice, comparator)
-
-    fmt.Println(sortedSlice) //[]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, lowIndex, highIndex int, 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.MergeSort(intSlice, 0, len(intSlice)-1, comparator)
-
-    fmt.Println(sortedSlice) //[]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
-
-}
-```
--- a/docs/convertor.md
+++ b/docs/convertor.md
@@ -5,14 +5,14 @@ Package convertor contains some functions for data type convertion.

 ## Source:

- [https://github.com/duke-git/lancet/blob/main/convertor/convertor.go](https://github.com/duke-git/lancet/blob/main/convertor/convertor.go)
+[https://github.com/duke-git/lancet/blob/v1/convertor/convertor.go](https://github.com/duke-git/lancet/blob/v1/convertor/convertor.go)

 <div STYLE="page-break-after: always;"></div>

 ## Usage:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )
 ```

@@ -24,6 +24,7 @@ import (
 - [ToBool](#ToBool)
 - [ToBytes](#ToBytes)
 - [ToChar](#ToChar)
+- [ToChannel](#ToChannel)
 - [ToInt](#ToInt)
 - [ToJson](#ToJson)
 - [ToString](#ToString)
@@ -50,12 +51,12 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
    colorHex := "#003366"
-    r, g, b := convertor.ColorHexToRGB(colorHex)
+    r, g, b := ColorHexToRGB(colorHex)
    fmt.Println(r, g, b) //0,51,102
 }
 ```
@@ -78,14 +79,14 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
    r := 0
    g := 51
    b := 102
-    colorHex := convertor.ColorRGBToHex(r, g, b)
+    colorHex := ColorRGBToHex(r, g, b)

    fmt.Println(colorHex) //#003366
 }
@@ -109,7 +110,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
@@ -136,7 +137,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func ToBytes(data any) ([]byte, error)
+func ToBytes(data interface{}) ([]byte, error)
 ```
 <b>Example:</b>

@@ -145,7 +146,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
@@ -175,7 +176,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
@@ -191,15 +192,14 @@ func main() {
 ```


+### <span id="ToChannel">ToChannel</span>

-### <span id="ToFloat">ToFloat</span>
-
-<p>Convert interface to a float64 value. If param is a invalid floatable, will return 0 and error. </p>
+<p>Convert a collection of elements to a read-only channels.</p>

 <b>Signature:</b>

 ```go
-func ToFloat(value any) (float64, error)
+func ToChannel(array []interface{}) <-chan interface{}
 ```
 <b>Example:</b>

@@ -208,7 +208,45 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
+)
+
+func main() {
+    ch := convertor.ToChannel([]int{1, 2, 3})
+
+    val1, _ := <-ch
+    fmt.Println(val1) //1
+
+    val2, _ := <-ch
+    fmt.Println(val2) //2
+
+    val3, _ := <-ch
+    fmt.Println(val3) //3
+
+    _, ok := <-ch
+    fmt.Println(ok) //false
+}
+```
+
+
+
+### <span id="ToFloat">ToFloat</span>
+
+<p>Convert interface to a float64 value. If param is a invalid floatable, will return 0 and error. </p>
+
+<b>Signature:</b>
+
+```go
+func ToFloat(value interface{}) (float64, error)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
@@ -232,7 +270,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func ToInt(value any) (int64, error)
+func ToInt(value interface{}) (int64, error)
 ```
 <b>Example:</b>

@@ -241,7 +279,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
@@ -265,7 +303,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func ToJson(value any) (string, error)
+func ToJson(value interface{}) (string, error)
 ```
 <b>Example:</b>

@@ -274,7 +312,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
@@ -293,7 +331,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func ToString(value any) string
+func ToString(value interface{}) string
 ```
 <b>Example:</b>

@@ -302,7 +340,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
@@ -321,7 +359,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func StructToMap(value any) (map[string]any, error)
+func StructToMap(value interface{}) (map[string]interface{}, error)
 ```
 <b>Example:</b>

@@ -330,7 +368,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
--- a/docs/convertor_zh-CN.md
+++ b/docs/convertor_zh-CN.md
@@ -5,7 +5,7 @@ convertor转换器包支持一些常见的数据类型转换

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/convertor/convertor.go](https://github.com/duke-git/lancet/blob/main/convertor/convertor.go)
+[https://github.com/duke-git/lancet/blob/v1/convertor/convertor.go](https://github.com/duke-git/lancet/blob/v1/convertor/convertor.go)

 <div STYLE="page-break-after: always;"></div>

@@ -13,7 +13,7 @@ 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"
+    "github.com/duke-git/lancet/convertor"
 )
 ```

@@ -26,6 +26,7 @@ import (
 - [ToBool](#ToBool)
 - [ToBytes](#ToBytes)
 - [ToChar](#ToChar)
+- [ToChannel](#ToChannel)
 - [ToInt](#ToInt)
 - [ToJson](#ToJson)
 - [ToString](#ToString)
@@ -52,12 +53,12 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
    colorHex := "#003366"
-    r, g, b := convertor.ColorHexToRGB(colorHex)
+    r, g, b := ColorHexToRGB(colorHex)
    fmt.Println(r, g, b) //0,51,102
 }
 ```
@@ -80,14 +81,14 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
    r := 0
    g := 51
    b := 102
-    colorHex := convertor.ColorRGBToHex(r, g, b)
+    colorHex := ColorRGBToHex(r, g, b)

    fmt.Println(colorHex) //#003366
 }
@@ -111,7 +112,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
@@ -138,7 +139,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func ToBytes(data any) ([]byte, error)
+func ToBytes(data interface{}) ([]byte, error)
 ```
 <b>列子:</b>

@@ -147,7 +148,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
@@ -177,7 +178,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
@@ -194,6 +195,44 @@ func main() {



+### <span id="ToChannel">ToChannel</span>
+
+<p>将切片转为只读channel</p>
+
+<b>函数签名:</b>
+
+```go
+func ToChannel(array []interface{}) <-chan interface{}
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/convertor"
+)
+
+func main() {
+    ch := convertor.ToChannel([]int{1, 2, 3})
+
+    val1, _ := <-ch
+    fmt.Println(val1) //1
+
+    val2, _ := <-ch
+    fmt.Println(val2) //2
+
+    val3, _ := <-ch
+    fmt.Println(val3) //3
+
+    _, ok := <-ch
+    fmt.Println(ok) //false
+}
+```
+
+
+
 ### <span id="ToFloat">ToFloat</span>

 <p>将interface转成float64类型，如果参数无法转换，会返回0和error</p>
@@ -201,7 +240,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func ToFloat(value any) (float64, error)
+func ToFloat(value interface{}) (float64, error)
 ```
 <b>列子:</b>

@@ -210,7 +249,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
@@ -234,7 +273,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func ToInt(value any) (int64, error)
+func ToInt(value interface{}) (int64, error)
 ```
 <b>例子:</b>

@@ -243,7 +282,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
@@ -267,7 +306,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func ToJson(value any) (string, error)
+func ToJson(value interface{}) (string, error)
 ```
 <b>列子:</b>

@@ -276,7 +315,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
@@ -295,7 +334,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func ToString(value any) string
+func ToString(value interface{}) string
 ```
 <b>例子:</b>

@@ -304,7 +343,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
@@ -323,7 +362,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func StructToMap(value any) (map[string]any, error)
+func StructToMap(value interface{}) (map[string]interface{}, error)
 ```
 <b>列子:</b>

@@ -332,7 +371,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/convertor"
+    "github.com/duke-git/lancet/convertor"
 )

 func main() {
--- a/docs/cryptor.md
+++ b/docs/cryptor.md
@@ -5,17 +5,17 @@ Package cryptor contains some functions for data encryption and decryption. Supp

 ## Source:

- [https://github.com/duke-git/lancet/blob/main/cryptor/aes.go](https://github.com/duke-git/lancet/blob/main/cryptor/aes.go)
- [https://github.com/duke-git/lancet/blob/main/cryptor/des.go](https://github.com/duke-git/lancet/blob/main/cryptor/des.go)
- [https://github.com/duke-git/lancet/blob/main/cryptor/basic.go](https://github.com/duke-git/lancet/blob/main/cryptor/basic.go)
- [https://github.com/duke-git/lancet/blob/main/cryptor/rsa.go](https://github.com/duke-git/lancet/blob/main/cryptor/rsa.go)
+- [https://github.com/duke-git/lancet/blob/v1/cryptor/aes.go](https://github.com/duke-git/lancet/blob/v1/cryptor/aes.go)
+- [https://github.com/duke-git/lancet/blob/v1/cryptor/des.go](https://github.com/duke-git/lancet/blob/v1/cryptor/des.go)
+- [https://github.com/duke-git/lancet/blob/v1/cryptor/basic.go](https://github.com/duke-git/lancet/blob/v1/cryptor/basic.go)
+- [https://github.com/duke-git/lancet/blob/v1/cryptor/rsa.go](https://github.com/duke-git/lancet/blob/v1/cryptor/rsa.go)

 <div STYLE="page-break-after: always;"></div>

 ## Usage:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )
 ```

@@ -80,7 +80,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -110,7 +110,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -140,7 +140,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -171,7 +171,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -202,7 +202,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -234,7 +234,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -264,7 +264,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -295,7 +295,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -325,7 +325,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -356,7 +356,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -384,7 +384,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -412,7 +412,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -443,7 +443,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -475,7 +475,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -506,7 +506,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -538,7 +538,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -570,7 +570,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -600,7 +600,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -631,7 +631,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -661,7 +661,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -693,7 +693,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -721,7 +721,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -749,7 +749,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -777,7 +777,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -806,7 +806,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -834,7 +834,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -862,7 +862,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -890,7 +890,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -918,7 +918,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -946,7 +946,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -976,7 +976,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -1012,7 +1012,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
--- a/docs/cryptor_zh-CN.md
+++ b/docs/cryptor_zh-CN.md
@@ -5,17 +5,17 @@ cryptor加密包支持数据加密和解密，获取md5，hash值。支持base64

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/cryptor/aes.go](https://github.com/duke-git/lancet/blob/main/cryptor/aes.go)
- [https://github.com/duke-git/lancet/blob/main/cryptor/des.go](https://github.com/duke-git/lancet/blob/main/cryptor/des.go)
- [https://github.com/duke-git/lancet/blob/main/cryptor/basic.go](https://github.com/duke-git/lancet/blob/main/cryptor/basic.go)
- [https://github.com/duke-git/lancet/blob/main/cryptor/rsa.go](https://github.com/duke-git/lancet/blob/main/cryptor/rsa.go)
+- [https://github.com/duke-git/lancet/blob/v1/cryptor/aes.go](https://github.com/duke-git/lancet/blob/v1/cryptor/aes.go)
+- [https://github.com/duke-git/lancet/blob/v1/cryptor/des.go](https://github.com/duke-git/lancet/blob/v1/cryptor/des.go)
+- [https://github.com/duke-git/lancet/blob/v1/cryptor/basic.go](https://github.com/duke-git/lancet/blob/v1/cryptor/basic.go)
+- [https://github.com/duke-git/lancet/blob/v1/cryptor/rsa.go](https://github.com/duke-git/lancet/blob/v1/cryptor/rsa.go)

 <div STYLE="page-break-after: always;"></div>

 ## 用法:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )
 ```

@@ -80,7 +80,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -110,7 +110,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -140,7 +140,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -171,7 +171,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -203,7 +203,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -235,7 +235,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -265,7 +265,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -296,7 +296,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -326,7 +326,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -356,7 +356,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -384,7 +384,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -412,7 +412,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -443,7 +443,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -475,7 +475,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -506,7 +506,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -538,7 +538,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -570,7 +570,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -600,7 +600,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -631,7 +631,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -661,7 +661,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -692,7 +692,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -720,7 +720,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -748,7 +748,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -776,7 +776,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -805,7 +805,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -833,7 +833,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -861,7 +861,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -889,7 +889,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -917,7 +917,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -945,7 +945,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -975,7 +975,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
@@ -1009,7 +1009,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/cryptor"
+    "github.com/duke-git/lancet/cryptor"
 )

 func main() {
--- a/docs/datetime.md
+++ b/docs/datetime.md
@@ -5,14 +5,14 @@ Package datetime supports date and time format and compare.

 ## Source:

- [https://github.com/duke-git/lancet/blob/main/datetime/datetime.go](https://github.com/duke-git/lancet/blob/main/datetime/datetime.go)
+[https://github.com/duke-git/lancet/blob/v1/datetime/datetime.go](https://github.com/duke-git/lancet/blob/v1/datetime/datetime.go)

 <div STYLE="page-break-after: always;"></div>

 ## Usage:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )
 ```

@@ -43,6 +43,14 @@ import (
 - [FormatTimeToStr](#FormatTimeToStr)

 - [FormatStrToTime](#FormatStrToTime)
+- [NewUnixNow](#NewUnixNow)
+- [NewUnix](#NewUnix)
+- [NewFormat](#NewFormat)
+- [NewISO8601](#NewISO8601)
+- [ToUnix](#ToUnix)
+- [ToFormat](#ToFormat)
+- [ToFormatForTpl](#ToFormatForTpl)
+- [ToIso8601](#ToIso8601)

 <div STYLE="page-break-after: always;"></div>

@@ -86,7 +94,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -115,7 +123,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -143,7 +151,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -171,7 +179,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -197,7 +205,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -223,7 +231,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -251,7 +259,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -279,7 +287,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -306,7 +314,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -334,7 +342,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -360,7 +368,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -386,7 +394,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -414,7 +422,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -442,7 +450,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -469,7 +477,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -496,7 +504,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -523,7 +531,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -550,7 +558,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -577,7 +585,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -604,7 +612,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -630,7 +638,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -656,7 +664,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -667,3 +675,221 @@ func main() {



+### <span id="NewUnixNow">NewUnixNow</span>
+<p>Return unix timestamp of current time</p>
+
+<b>Signature:</b>
+
+```go
+type theTime struct {
+	unix int64
+}
+func NewUnixNow() *theTime
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    tm := datetime.NewUnixNow()
+    fmt.Println(tm) //&{1647597438}
+}
+```
+
+
+### <span id="NewUnix">NewUnix</span>
+<p>Return unix timestamp of specified int64 value.</p>
+
+<b>Signature:</b>
+
+```go
+type theTime struct {
+	unix int64
+}
+func NewUnix(unix int64) *theTime
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    tm := datetime.NewUnix(1647597438)
+    fmt.Println(tm) //&{1647597438}
+}
+```
+
+
+
+### <span id="NewFormat">NewFormat</span>
+<p>Return unix timestamp of specified time string, t should be "yyyy-mm-dd hh:mm:ss".</p>
+
+<b>Signature:</b>
+
+```go
+type theTime struct {
+	unix int64
+}
+func NewFormat(t string) (*theTime, error)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    tm, err := datetime.NewFormat("2022-03-18 17:04:05")
+    fmt.Println(tm) //&{1647594245}
+}
+```
+
+
+
+
+### <span id="NewISO8601">NewISO8601</span>
+<p>Return unix timestamp of specified iso8601 time string.</p>
+
+<b>Signature:</b>
+
+```go
+type theTime struct {
+	unix int64
+}
+func NewISO8601(iso8601 string) (*theTime, error)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    tm, err := datetime.NewISO8601("2006-01-02T15:04:05.999Z")
+    fmt.Println(tm) //&{1136214245}
+}
+```
+
+
+
+### <span id="ToUnix">ToUnix</span>
+<p>Return unix timestamp.</p>
+
+<b>Signature:</b>
+
+```go
+func (t *theTime) ToUnix() int64
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    tm := datetime.NewUnixNow()
+    fmt.Println(tm.ToUnix()) //1647597438
+}
+```
+
+
+
+### <span id="ToFormat">ToFormat</span>
+<p>Return time string 'yyyy-mm-dd hh:mm:ss'.</p>
+
+<b>Signature:</b>
+
+```go
+func (t *theTime) ToFormat() string
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    tm, _ := datetime.NewFormat("2022-03-18 17:04:05")
+    fmt.Println(tm.ToFormat()) //"2022-03-18 17:04:05"
+}
+```
+
+
+
+### <span id="ToFormatForTpl">ToFormatForTpl</span>
+<p>Return the time string which format is specified tpl.</p>
+
+<b>Signature:</b>
+
+```go
+func (t *theTime) ToFormatForTpl(tpl string) string
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    tm, _ := datetime.NewFormat("2022-03-18 17:04:05")
+    ts := tm.ToFormatForTpl("2006/01/02 15:04:05")
+    fmt.Println(ts) //"2022/03/18 17:04:05"
+}
+```
+
+
+### <span id="ToIso8601">ToIso8601</span>
+<p>Return iso8601 time string.</p>
+
+<b>Signature:</b>
+
+```go
+func (t *theTime) ToIso8601() string
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    tm, _ := datetime.NewISO8601("2006-01-02T15:04:05.999Z")
+    ts := tm.ToIso8601()
+    fmt.Println(ts) //"2006-01-02T23:04:05+08:00"
+}
+```
--- a/docs/datetime_zh-CN.md
+++ b/docs/datetime_zh-CN.md
@@ -5,14 +5,14 @@ datetime日期时间处理包，格式化日期，比较日期。

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/datetime/datetime.go](https://github.com/duke-git/lancet/blob/main/datetime/datetime.go)
+[https://github.com/duke-git/lancet/blob/v1/datetime/datetime.go](https://github.com/duke-git/lancet/blob/v1/datetime/datetime.go)

 <div STYLE="page-break-after: always;"></div>

 ## 用法:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )
 ```

@@ -42,6 +42,14 @@ import (
 - [GetNightTimestamp](#GetNightTimestamp)
 - [FormatTimeToStr](#FormatTimeToStr)
 - [FormatStrToTime](#FormatStrToTime)
+- [NewUnixNow](#NewUnixNow)
+- [NewUnix](#NewUnix)
+- [NewFormat](#NewFormat)
+- [NewISO8601](#NewISO8601)
+- [ToUnix](#ToUnix)
+- [ToFormat](#ToFormat)
+- [ToFormatForTpl](#ToFormatForTpl)
+- [ToIso8601](#ToIso8601)

 <div STYLE="page-break-after: always;"></div>

@@ -85,7 +93,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -114,7 +122,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -142,7 +150,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -170,7 +178,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -196,7 +204,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -222,7 +230,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -250,7 +258,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -278,7 +286,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -305,7 +313,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -333,7 +341,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -359,7 +367,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -385,7 +393,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -413,7 +421,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -441,7 +449,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -468,7 +476,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -495,7 +503,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -522,7 +530,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -549,7 +557,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -576,7 +584,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -603,7 +611,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -629,7 +637,7 @@ package main
 import (
    "fmt"
    "time"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -655,7 +663,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/datetime"
+    "github.com/duke-git/lancet/datetime"
 )

 func main() {
@@ -666,3 +674,222 @@ func main() {



+### <span id="NewUnixNow">NewUnixNow</span>
+<p>创建一个当前时间的unix时间戳</p>
+
+<b>函数签名:</b>
+
+```go
+type theTime struct {
+	unix int64
+}
+func NewUnixNow() *theTime
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    tm := datetime.NewUnixNow()
+    fmt.Println(tm) //&{1647597438}
+}
+```
+
+
+### <span id="NewUnix">NewUnix</span>
+<p>创建一个unix时间戳</p>
+
+<b>函数签名:</b>
+
+```go
+type theTime struct {
+	unix int64
+}
+func NewUnix(unix int64) *theTime
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    tm := datetime.NewUnix(1647597438)
+    fmt.Println(tm) //&{1647597438}
+}
+```
+
+
+
+### <span id="NewFormat">NewFormat</span>
+<p>创建一个yyyy-mm-dd hh:mm:ss格式时间字符串的unix时间戳</p>
+
+<b>函数签名:</b>
+
+```go
+type theTime struct {
+	unix int64
+}
+func NewFormat(t string) (*theTime, error)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    tm, err := datetime.NewFormat("2022-03-18 17:04:05")
+    fmt.Println(tm) //&{1647594245}
+}
+```
+
+
+
+
+### <span id="NewISO8601">NewISO8601</span>
+<p>创建一个iso8601格式时间字符串的unix时间戳</p>
+
+<b>函数签名:</b>
+
+```go
+type theTime struct {
+	unix int64
+}
+func NewISO8601(iso8601 string) (*theTime, error)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    tm, err := datetime.NewISO8601("2006-01-02T15:04:05.999Z")
+    fmt.Println(tm) //&{1136214245}
+}
+```
+
+
+
+### <span id="ToUnix">ToUnix</span>
+<p>返回unix时间戳</p>
+
+<b>函数签名:</b>
+
+```go
+func (t *theTime) ToUnix() int64
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    tm := datetime.NewUnixNow()
+    fmt.Println(tm.ToUnix()) //1647597438
+}
+```
+
+
+
+### <span id="ToFormat">ToFormat</span>
+<p>返回格式'yyyy-mm-dd hh:mm:ss'的日期字符串</p>
+
+<b>函数签名:</b>
+
+```go
+func (t *theTime) ToFormat() string
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    tm, _ := datetime.NewFormat("2022-03-18 17:04:05")
+    fmt.Println(tm.ToFormat()) //"2022-03-18 17:04:05"
+}
+```
+
+
+
+### <span id="ToFormatForTpl">ToFormatForTpl</span>
+<p>返回tpl格式指定的日期字符串</p>
+
+<b>函数签名:</b>
+
+```go
+func (t *theTime) ToFormatForTpl(tpl string) string
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    tm, _ := datetime.NewFormat("2022-03-18 17:04:05")
+    ts := tm.ToFormatForTpl("2006/01/02 15:04:05")
+    fmt.Println(ts) //"2022/03/18 17:04:05"
+}
+```
+
+
+### <span id="ToIso8601">ToIso8601</span>
+<p>返回iso8601日期字符串</p>
+
+<b>函数签名:</b>
+
+```go
+func (t *theTime) ToIso8601() string
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    tm, _ := datetime.NewISO8601("2006-01-02T15:04:05.999Z")
+    ts := tm.ToIso8601()
+    fmt.Println(ts) //"2006-01-02T23:04:05+08:00"
+}
+```
+
--- a/docs/fileutil.md
+++ b/docs/fileutil.md
@@ -5,14 +5,14 @@ Package fileutil implements some basic functions for file operations.

 ## Source:

- [https://github.com/duke-git/lancet/blob/main/fileutil/file.go](https://github.com/duke-git/lancet/blob/main/fileutil/file.go)
+[https://github.com/duke-git/lancet/blob/v1/fileutil/file.go](https://github.com/duke-git/lancet/blob/v1/fileutil/file.go)

 <div STYLE="page-break-after: always;"></div>

 ## Usage:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )
 ```

@@ -21,6 +21,8 @@ import (
 ## Index
 - [ClearFile](#ClearFile)
 - [CreateFile](#CreateFile)
+  
+- [CreateDir](#CreateDir)
 - [CopyFile](#CopyFile)
 - [FileMode](#FileMode)
 - [MiMeType](#MiMeType)
@@ -32,7 +34,6 @@ import (
 - [ReadFileToString](#ReadFileToString)
 - [ReadFileByLine](#ReadFileByLine)
 - [Zip](#Zip)
-
 - [UnZip](#UnZip)

 <div STYLE="page-break-after: always;"></div>
@@ -56,7 +57,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -67,6 +68,34 @@ 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>

@@ -82,7 +111,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -107,7 +136,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -135,7 +164,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -155,7 +184,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func MiMeType(file any) string
+func MiMeType(file interface{}) string
 ```
 <b>Example:</b>

@@ -165,7 +194,7 @@ package main
 import (
    "fmt"
    "os"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -196,7 +225,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -223,7 +252,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -249,7 +278,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -278,7 +307,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -304,7 +333,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -332,7 +361,7 @@ package main
 import (
    "fmt"
    "os"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -365,7 +394,7 @@ package main
 import (
    "fmt"
    "os"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -398,7 +427,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -427,7 +456,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
--- a/docs/fileutil_zh-CN.md
+++ b/docs/fileutil_zh-CN.md
@@ -5,14 +5,14 @@ fileutil包支持文件基本操作。

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/fileutil/file.go](https://github.com/duke-git/lancet/blob/main/fileutil/file.go)
+[https://github.com/duke-git/lancet/blob/v1/fileutil/file.go](https://github.com/duke-git/lancet/blob/v1/fileutil/file.go)

 <div STYLE="page-break-after: always;"></div>

 ## 用法:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )
 ```

@@ -21,6 +21,7 @@ import (
 ## 目录
 - [ClearFile](#ClearFile)
 - [CreateFile](#CreateFile)
+- [CreateDir](#CreateDir)
 - [CopyFile](#CopyFile)
 - [FileMode](#FileMode)
 - [MiMeType](#MiMeType)
@@ -56,7 +57,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -67,6 +68,33 @@ 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>

@@ -82,7 +110,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -107,7 +135,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -135,7 +163,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -155,7 +183,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func MiMeType(file any) string
+func MiMeType(file interface{}) string
 ```
 <b>例子:</b>

@@ -165,7 +193,7 @@ package main
 import (
    "fmt"
    "os"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -196,7 +224,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -223,7 +251,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -249,7 +277,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -278,7 +306,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -304,7 +332,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -332,7 +360,7 @@ package main
 import (
    "fmt"
    "os"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -365,7 +393,7 @@ package main
 import (
    "fmt"
    "os"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -398,7 +426,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -427,7 +455,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
--- a/docs/formatter.md
+++ b/docs/formatter.md
@@ -5,14 +5,14 @@ formatter contains some functions for data formatting.

 ## Source:

- [https://github.com/duke-git/lancet/blob/main/formatter/formatter.go](https://github.com/duke-git/lancet/blob/main/formatter/formatter.go)
+[https://github.com/duke-git/lancet/blob/v1/formatter/formatter.go](https://github.com/duke-git/lancet/blob/v1/formatter/formatter.go)

 <div STYLE="page-break-after: always;"></div>

 ## Usage:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/formatter"
+    "github.com/duke-git/lancet/formatter"
 )
 ```

@@ -34,7 +34,7 @@ Param should be number or numberic string.</p>
 <b>Signature:</b>

 ```go
-func Comma(v any, symbol string) string
+func Comma(v interface{}, symbol string) string
 ```
 <b>Example:</b>

@@ -43,7 +43,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/formatter"
+    "github.com/duke-git/lancet/formatter"
 )

 func main() {
--- a/docs/formatter_zh-CN.md
+++ b/docs/formatter_zh-CN.md
@@ -5,14 +5,14 @@ formatter格式化器包含一些数据格式化处理方法。

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/formatter/formatter.go](https://github.com/duke-git/lancet/blob/main/formatter/formatter.go)
+[https://github.com/duke-git/lancet/blob/v1/formatter/formatter.go](https://github.com/duke-git/lancet/blob/v1/formatter/formatter.go)

 <div STYLE="page-break-after: always;"></div>

 ## 用法:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/formatter"
+    "github.com/duke-git/lancet/formatter"
 )
 ```

@@ -33,7 +33,7 @@ import (
 <b>函数签名:</b>

 ```go
-func Comma(v any, symbol string) string
+func Comma(v interface{}, symbol string) string
 ```
 <b>例子:</b>

@@ -42,7 +42,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/formatter"
+    "github.com/duke-git/lancet/formatter"
 )

 func main() {
--- a/docs/function.md
+++ b/docs/function.md
@@ -5,15 +5,15 @@ Package function can control the flow of function execution and support part of

 ## Source:

- [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)
+[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)

 <div STYLE="page-break-after: always;"></div>

 ## Usage:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )
 ```

@@ -40,7 +40,7 @@ import (
 <b>Signature:</b>

 ```go
-func After(n int, fn any) func(args ...any) []reflect.Value
+func After(n int, fn interface{}) func(args ...interface{}) []reflect.Value
 ```
 <b>Example:</b>

@@ -49,7 +49,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
@@ -59,7 +59,7 @@ func main() {
 		return i
 	})

-	type cb func(args ...any) []reflect.Value
+	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)
@@ -87,7 +87,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func Before(n int, fn any) func(args ...any) []reflect.Value
+func Before(n int, fn interface{}) func(args ...interface{}) []reflect.Value
 ```
 <b>Example:</b>

@@ -96,8 +96,8 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
-    "github.com/duke-git/lancet/v2/internal"
+    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/internal"
 )

 func main() {
@@ -109,7 +109,7 @@ func main() {
 	})

 	var res []int64
-	type cb func(args ...any) []reflect.Value
+	type cb func(args ...interface{}) []reflect.Value
 	appendStr := func(i int, s string, fn cb) {
 		v := fn(i)
 		res = append(res, v[0].Int())
@@ -133,8 +133,8 @@ func main() {
 <b>Signature:</b>

 ```go
-type Fn func(...any) any
-func (f Fn) Curry(i any) func(...any) any
+type Fn func(...interface{}) interface{}
+func (f Fn) Curry(i interface{}) func(...interface{}) interface{}
 ```
 <b>Example:</b>

@@ -143,14 +143,14 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
    add := func(a, b int) int {
 		return a + b
 	}
-	var addCurry function.Fn = func(values ...any) any {
+	var addCurry function.Fn = func(values ...interface{}) interface{} {
 		return add(values[0].(int), values[1].(int))
 	}
 	add1 := addCurry.Curry(1)
@@ -168,7 +168,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func Compose(fnList ...func(...any) any) func(...any) any
+func Compose(fnList ...func(...interface{}) interface{}) func(...interface{}) interface{}
 ```
 <b>Example:</b>

@@ -177,14 +177,14 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
-    add1 := func(v ...any) any {
+    add1 := func(v ...interface{}) interface{} {
 		return v[0].(int) + 1
 	}
-    add2 := func(v ...any) any {
+    add2 := func(v ...interface{}) interface{} {
 		return v[0].(int) + 2
 	}

@@ -213,7 +213,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
@@ -246,7 +246,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func Delay(delay time.Duration, fn any, args ...any)
+func Delay(delay time.Duration, fn interface{}, args ...interface{})
 ```
 <b>Example:</b>

@@ -255,7 +255,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
@@ -275,7 +275,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func Schedule(d time.Duration, fn any, args ...any) chan bool
+func Schedule(d time.Duration, fn interface{}, args ...interface{}) chan bool
 ```
 <b>Example:</b>

@@ -284,7 +284,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
@@ -327,7 +327,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
--- a/docs/function_zh-CN.md
+++ b/docs/function_zh-CN.md
@@ -5,15 +5,15 @@ function函数包控制函数执行流程，包含部分函数式编程。

 ## 源码:

- [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)
+[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)

 <div STYLE="page-break-after: always;"></div>

 ## 用法:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )
 ```

@@ -40,7 +40,7 @@ import (
 <b>函数签名:</b>

 ```go
-func After(n int, fn any) func(args ...any) []reflect.Value
+func After(n int, fn interface{}) func(args ...interface{}) []reflect.Value
 ```
 <b>例子:</b>

@@ -49,7 +49,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
@@ -59,7 +59,7 @@ func main() {
 		return i
 	})

-	type cb func(args ...any) []reflect.Value
+	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)
@@ -87,7 +87,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func Before(n int, fn any) func(args ...any) []reflect.Value
+func Before(n int, fn interface{}) func(args ...interface{}) []reflect.Value
 ```
 <b>例子:</b>

@@ -96,8 +96,8 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
-    "github.com/duke-git/lancet/v2/internal"
+    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/internal"
 )

 func main() {
@@ -109,7 +109,7 @@ func main() {
 	})

 	var res []int64
-	type cb func(args ...any) []reflect.Value
+	type cb func(args ...interface{}) []reflect.Value
 	appendStr := func(i int, s string, fn cb) {
 		v := fn(i)
 		res = append(res, v[0].Int())
@@ -133,8 +133,8 @@ func main() {
 <b>函数签名:</b>

 ```go
-type Fn func(...any) any
-func (f Fn) Curry(i any) func(...any) any
+type Fn func(...interface{}) interface{}
+func (f Fn) Curry(i interface{}) func(...interface{}) interface{}
 ```
 <b>例子:</b>

@@ -143,14 +143,14 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
 	add := func(a, b int) int {
 		return a + b
 	}
-	var addCurry function.Fn = func(values ...any) any {
+	var addCurry function.Fn = func(values ...interface{}) interface{} {
 		return add(values[0].(int), values[1].(int))
 	}
 	add1 := addCurry.Curry(1)
@@ -168,7 +168,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func Compose(fnList ...func(...any) any) func(...any) any
+func Compose(fnList ...func(...interface{}) interface{}) func(...interface{}) interface{}
 ```
 <b>例子:</b>

@@ -177,14 +177,14 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
-	add1 := func(v ...any) any {
+	add1 := func(v ...interface{}) interface{} {
 		return v[0].(int) + 1
 	}
-	add2 := func(v ...any) any {
+	add2 := func(v ...interface{}) interface{} {
 		return v[0].(int) + 2
 	}

@@ -213,7 +213,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
@@ -246,7 +246,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func Delay(delay time.Duration, fn any, args ...any)
+func Delay(delay time.Duration, fn interface{}, args ...interface{})
 ```
 <b>例子:</b>

@@ -255,7 +255,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
@@ -275,7 +275,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func Schedule(d time.Duration, fn any, args ...any) chan bool
+func Schedule(d time.Duration, fn interface{}, args ...interface{}) chan bool
 ```
 <b>例子:</b>

@@ -284,7 +284,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
@@ -327,7 +327,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
--- a/docs/mathutil.md
+++ b/docs/mathutil.md
@@ -5,7 +5,7 @@ Package mathutil implements some functions for math calculation.

 ## Source:

- [https://github.com/duke-git/lancet/blob/main/mathutil/mathutil.go](https://github.com/duke-git/lancet/blob/main/mathutil/mathutil.go)
+[https://github.com/duke-git/lancet/blob/v1/mathutil/mathutil.go](https://github.com/duke-git/lancet/blob/v1/mathutil/mathutil.go)


 <div STYLE="page-break-after: always;"></div>
@@ -13,7 +13,7 @@ Package mathutil implements some functions for math calculation.
 ## Example:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )
 ```

@@ -48,7 +48,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
@@ -75,7 +75,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
@@ -104,7 +104,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
@@ -132,7 +132,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
@@ -158,7 +158,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
@@ -188,7 +188,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
@@ -217,7 +217,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
--- a/docs/mathutil_zh-CN.md
+++ b/docs/mathutil_zh-CN.md
@@ -5,7 +5,7 @@ mathutil包实现了一些数学计算的函数.

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/mathutil/mathutil.go](https://github.com/duke-git/lancet/blob/main/mathutil/mathutil.go)
+[https://github.com/duke-git/lancet/blob/v1/mathutil/mathutil.go](https://github.com/duke-git/lancet/blob/v1/mathutil/mathutil.go)


 <div STYLE="page-break-after: always;"></div>
@@ -13,7 +13,7 @@ mathutil包实现了一些数学计算的函数.
 ## 用法:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )
 ```

@@ -49,7 +49,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
@@ -76,7 +76,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
@@ -105,7 +105,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
@@ -133,7 +133,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
@@ -159,7 +159,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
@@ -189,7 +189,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
@@ -218,7 +218,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
--- a/docs/netutil.md
+++ b/docs/netutil.md
@@ -5,16 +5,16 @@ Package netutil contains functions to get net information and send http request.

 ## Source:

- [https://github.com/duke-git/lancet/blob/main/netutil/net.go](https://github.com/duke-git/lancet/blob/main/netutil/net.go)
+[https://github.com/duke-git/lancet/blob/v1/netutil/net.go](https://github.com/duke-git/lancet/blob/v1/netutil/net.go)

- [https://github.com/duke-git/lancet/blob/main/netutil/http.go](https://github.com/duke-git/lancet/blob/main/netutil/http.go)
+[https://github.com/duke-git/lancet/blob/v1/netutil/http.go](https://github.com/duke-git/lancet/blob/v1/netutil/http.go)

 <div STYLE="page-break-after: always;"></div>

 ## Usage:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )
 ```

@@ -22,16 +22,19 @@ import (

 ## Index
 - [ConvertMapToQueryString](#ConvertMapToQueryString)
+- [EncodeUrl](#EncodeUrl)
 - [GetInternalIp](#GetInternalIp)
 - [GetIps](#GetIps)
 - [GetMacAddrs](#GetMacAddrs)
 - [GetPublicIpInfo](#GetPublicIpInfo)
+- [GetRequestPublicIp](#GetRequestPublicIp)
 - [IsPublicIP](#IsPublicIP)
+
+- [IsInternalIP](#IsInternalIP)
 - [HttpGet](#HttpGet)
 - [HttpDelete](#HttpDelete)
 - [HttpPost](#HttpPost)
 - [HttpPut](#HttpPut)
-
 - [HttpPatch](#HttpPatch)
 - [ParseHttpResponse](#ParseHttpResponse)

@@ -46,7 +49,7 @@ import (
 <b>Signature:</b>

 ```go
-func ConvertMapToQueryString(param map[string]any) string
+func ConvertMapToQueryString(param map[string]interface{}) string
 ```
 <b>Example:</b>

@@ -55,11 +58,11 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
-	var m = map[string]any{
+	var m = map[string]interface{}{
 		"c": 3,
 		"a": 1,
 		"b": 2,
@@ -72,6 +75,35 @@ func main() {



+### <span id="EncodeUrl">EncodeUrl</span>
+<p>Encode url query string values.</p>
+
+<b>Signature:</b>
+
+```go
+func EncodeUrl(urlStr string) (string, error)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/netutil"
+)
+
+func main() {
+	urlAddr := "http://www.lancet.com?a=1&b=[2]"
+	encodedUrl, err := netutil.EncodeUrl(urlAddr)
+	if err != nil {
+		fmt.Println(err)
+	}
+	fmt.Println(encodedUrl) //http://www.lancet.com?a=1&b=%5B2%5D
+}
+```
+
+
 ### <span id="GetInternalIp">GetInternalIp</span>
 <p>Get internal ip information.</p>

@@ -88,7 +120,7 @@ package main
 import (
    "fmt"
 	"net"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -117,7 +149,7 @@ package main
 import (
    "fmt"
 	"net"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -144,7 +176,7 @@ package main
 import (
    "fmt"
 	"net"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -184,7 +216,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -198,6 +230,48 @@ func main() {
 ```


+### <span id="GetRequestPublicIp">GetRequestPublicIp</span>
+<p>Get http request public ip.</p>
+
+<b>Signature:</b>
+
+```go
+func GetRequestPublicIp(req *http.Request) string
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/netutil"
+)
+
+func main() {
+	ip := "36.112.24.10"
+
+	request1 := http.Request{
+		Method: "GET",
+		Header: http.Header{
+			"X-Forwarded-For": {ip},
+		},
+	}
+	publicIp1 := netutil.GetRequestPublicIp(&request1)
+	fmt.Println(publicIp1) //36.112.24.10
+
+	request2 := http.Request{
+		Method: "GET",
+		Header: http.Header{
+			"X-Real-Ip": {ip},
+		},
+	}
+	publicIp2 := netutil.GetRequestPublicIp(&request2)
+	fmt.Println(publicIp2) //36.112.24.10
+}
+```
+
+

 ### <span id="IsPublicIP">IsPublicIP</span>
 <p>Checks if a ip is public or not.</p>
@@ -215,7 +289,7 @@ package main
 import (
    "fmt"
 	"net"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -229,6 +303,36 @@ func main() {



+### <span id="IsInternalIP">IsInternalIP</span>
+<p>Checks if an ip is intranet or not.</p>
+
+<b>Signature:</b>
+
+```go
+func IsInternalIP(IP net.IP) bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+	"net"
+    "github.com/duke-git/lancet/v2/netutil"
+)
+
+func main() {
+	ip1 := net.ParseIP("127.0.0.1")
+	ip2 := net.ParseIP("36.112.24.10")
+
+	fmt.Println(netutil.IsInternalIP(ip1)) //true
+	fmt.Println(netutil.IsInternalIP(ip2)) //false
+}
+```
+
+
+

 ### <span id="HttpGet">HttpGet</span>
 <p>Send http get request.</p>
@@ -237,10 +341,10 @@ func main() {

 ```go
 // params[0] is header which type should be http.Header or map[string]string,
-// params[1] is query param which type should be url.Values or map[string]any,
+// params[1] is query param which type should be url.Values or map[string]interface{},
 // params[2] is post body which type should be []byte.
 // params[3] is http client which type should be http.Client.
-func HttpGet(url string, params ...any) (*http.Response, error)
+func HttpGet(url string, params ...interface{}) (*http.Response, error)
 ```
 <b>Example:</b>

@@ -251,7 +355,7 @@ import (
    "fmt"
 	"io/ioutil"
 	"log"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -279,10 +383,10 @@ func main() {

 ```go
 // params[0] is header which type should be http.Header or map[string]string,
-// params[1] is query param which type should be url.Values or map[string]any,
+// params[1] is query param which type should be url.Values or map[string]interface{},
 // params[2] is post body which type should be []byte.
 // params[3] is http client which type should be http.Client.
-func HttpPost(url string, params ...any) (*http.Response, error)
+func HttpPost(url string, params ...interface{}) (*http.Response, error)
 ```
 <b>Example:</b>

@@ -294,7 +398,7 @@ import (
    "fmt"
 	"io/ioutil"
 	"log"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -328,10 +432,10 @@ func main() {

 ```go
 // params[0] is header which type should be http.Header or map[string]string,
-// params[1] is query param which type should be url.Values or map[string]any,
+// params[1] is query param which type should be url.Values or map[string]interface{},
 // params[2] is post body which type should be []byte.
 // params[3] is http client which type should be http.Client.
-func HttpPut(url string, params ...any) (*http.Response, error)
+func HttpPut(url string, params ...interface{}) (*http.Response, error)
 ```
 <b>Example:</b>

@@ -343,7 +447,7 @@ import (
    "fmt"
 	"io/ioutil"
 	"log"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -378,10 +482,10 @@ func main() {

 ```go
 // params[0] is header which type should be http.Header or map[string]string,
-// params[1] is query param which type should be url.Values or map[string]any,
+// params[1] is query param which type should be url.Values or map[string]interface{},
 // params[2] is post body which type should be []byte.
 // params[3] is http client which type should be http.Client.
-func HttpDelete(url string, params ...any) (*http.Response, error)
+func HttpDelete(url string, params ...interface{}) (*http.Response, error)
 ```
 <b>Example:</b>

@@ -393,7 +497,7 @@ import (
    "fmt"
 	"io/ioutil"
 	"log"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -417,10 +521,10 @@ func main() {

 ```go
 // params[0] is header which type should be http.Header or map[string]string,
-// params[1] is query param which type should be url.Values or map[string]any,
+// params[1] is query param which type should be url.Values or map[string]interface{},
 // params[2] is post body which type should be []byte.
 // params[3] is http client which type should be http.Client.
-func HttpPatch(url string, params ...any) (*http.Response, error)
+func HttpPatch(url string, params ...interface{}) (*http.Response, error)
 ```
 <b>Example:</b>

@@ -432,7 +536,7 @@ import (
    "fmt"
 	"io/ioutil"
 	"log"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -466,7 +570,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func ParseHttpResponse(resp *http.Response, obj any) error
+func ParseHttpResponse(resp *http.Response, obj interface{}) error
 ```
 <b>Example:</b>

@@ -478,7 +582,7 @@ import (
    "fmt"
 	"io/ioutil"
 	"log"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
--- a/docs/netutil_zh-CN.md
+++ b/docs/netutil_zh-CN.md
@@ -5,15 +5,16 @@ netutil网络包支持获取ip地址，发送http请求。

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/netutil/net.go](https://github.com/duke-git/lancet/blob/main/netutil/net.go)
- [https://github.com/duke-git/lancet/blob/main/netutil/http.go](https://github.com/duke-git/lancet/blob/main/netutil/http.go)
+[https://github.com/duke-git/lancet/blob/v1/netutil/net.go](https://github.com/duke-git/lancet/blob/v1/netutil/net.go)
+
+[https://github.com/duke-git/lancet/blob/v1/netutil/http.go](https://github.com/duke-git/lancet/blob/v1/netutil/http.go)

 <div STYLE="page-break-after: always;"></div>

 ## 用法:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )
 ```

@@ -21,16 +22,19 @@ import (

 ## 目录
 - [ConvertMapToQueryString](#ConvertMapToQueryString)
+- [EncodeUrl](#EncodeUrl)
 - [GetInternalIp](#GetInternalIp)
 - [GetIps](#GetIps)
 - [GetMacAddrs](#GetMacAddrs)
 - [GetPublicIpInfo](#GetPublicIpInfo)
+- [GetRequestPublicIp](#GetRequestPublicIp)
+
 - [IsPublicIP](#IsPublicIP)
+- [IsInternalIP](#IsInternalIP)
 - [HttpGet](#HttpGet)
 - [HttpDelete](#HttpDelete)
 - [HttpPost](#HttpPost)
 - [HttpPut](#HttpPut)
-
 - [HttpPatch](#HttpPatch)
 - [ParseHttpResponse](#ParseHttpResponse)

@@ -45,7 +49,7 @@ import (
 <b>函数签名:</b>

 ```go
-func ConvertMapToQueryString(param map[string]any) string
+func ConvertMapToQueryString(param map[string]interface{}) string
 ```
 <b>例子:</b>

@@ -54,11 +58,11 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
-	var m = map[string]any{
+	var m = map[string]interface{}{
 		"c": 3,
 		"a": 1,
 		"b": 2,
@@ -71,6 +75,36 @@ func main() {



+### <span id="EncodeUrl">EncodeUrl</span>
+<p>编码url query string的值</p>
+
+<b>函数签名:</b>
+
+```go
+func EncodeUrl(urlStr string) (string, error)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/netutil"
+)
+
+func main() {
+	urlAddr := "http://www.lancet.com?a=1&b=[2]"
+	encodedUrl, err := netutil.EncodeUrl(urlAddr)
+	if err != nil {
+		fmt.Println(err)
+	}
+	fmt.Println(encodedUrl) //http://www.lancet.com?a=1&b=%5B2%5D
+}
+```
+
+
+
 ### <span id="GetInternalIp">GetInternalIp</span>
 <p>获取内部ip</p>

@@ -87,7 +121,7 @@ package main
 import (
    "fmt"
 	"net"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -115,7 +149,7 @@ package main
 import (
    "fmt"
 	"net"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -142,7 +176,7 @@ package main
 import (
    "fmt"
 	"net"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -182,7 +216,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -197,6 +231,49 @@ func main() {



+### <span id="GetRequestPublicIp">GetRequestPublicIp</span>
+<p>获取http请求ip</p>
+
+<b>函数签名:</b>
+
+```go
+func GetRequestPublicIp(req *http.Request) string
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/netutil"
+)
+
+func main() {
+	ip := "36.112.24.10"
+
+	request1 := http.Request{
+		Method: "GET",
+		Header: http.Header{
+			"X-Forwarded-For": {ip},
+		},
+	}
+	publicIp1 := netutil.GetRequestPublicIp(&request1)
+	fmt.Println(publicIp1) //36.112.24.10
+
+	request2 := http.Request{
+		Method: "GET",
+		Header: http.Header{
+			"X-Real-Ip": {ip},
+		},
+	}
+	publicIp2 := netutil.GetRequestPublicIp(&request2)
+	fmt.Println(publicIp2) //36.112.24.10
+}
+```
+
+
+
 ### <span id="IsPublicIP">IsPublicIP</span>
 <p>判断ip是否是公共ip</p>

@@ -213,7 +290,7 @@ package main
 import (
    "fmt"
 	"net"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -227,6 +304,35 @@ func main() {



+### <span id="IsInternalIP">IsInternalIP</span>
+<p>判断ip是否是局域网ip.</p>
+
+<b>函数签名:</b>
+
+```go
+func IsInternalIP(IP net.IP) bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+	"net"
+    "github.com/duke-git/lancet/netutil"
+)
+
+func main() {
+	ip1 := net.ParseIP("127.0.0.1")
+	ip2 := net.ParseIP("36.112.24.10")
+
+	fmt.Println(netutil.IsInternalIP(ip1)) //true
+	fmt.Println(netutil.IsInternalIP(ip2)) //false
+}
+```
+
+

 ### <span id="HttpGet">HttpGet</span>
 <p>发送http get请求</p>
@@ -235,10 +341,10 @@ func main() {

 ```go
 // params[0] http请求header，类型必须是http.Header或者map[string]string
-// params[1] http查询字符串，类型必须是url.Values或者map[string]any
+// params[1] http查询字符串，类型必须是url.Values或者map[string]interface{}
 // params[2] post请求体，类型必须是[]byte
 // params[3] http client，类型必须是http.Client
-func HttpGet(url string, params ...any) (*http.Response, error)
+func HttpGet(url string, params ...interface{}) (*http.Response, error)
 ```
 <b>例子:</b>

@@ -249,7 +355,7 @@ import (
    "fmt"
 	"io/ioutil"
 	"log"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -277,10 +383,10 @@ func main() {

 ```go
 // params[0] http请求header，类型必须是http.Header或者map[string]string
-// params[1] http查询字符串，类型必须是url.Values或者map[string]any
+// params[1] http查询字符串，类型必须是url.Values或者map[string]interface{}
 // params[2] post请求体，类型必须是[]byte
 // params[3] http client，类型必须是http.Client
-func HttpPost(url string, params ...any) (*http.Response, error)
+func HttpPost(url string, params ...interface{}) (*http.Response, error)
 ```
 <b>例子:</b>

@@ -292,7 +398,7 @@ import (
    "fmt"
 	"io/ioutil"
 	"log"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -326,10 +432,10 @@ func main() {

 ```go
 // params[0] http请求header，类型必须是http.Header或者map[string]string
-// params[1] http查询字符串，类型必须是url.Values或者map[string]any
+// params[1] http查询字符串，类型必须是url.Values或者map[string]interface{}
 // params[2] post请求体，类型必须是[]byte
 // params[3] http client，类型必须是http.Client
-func HttpPut(url string, params ...any) (*http.Response, error)
+func HttpPut(url string, params ...interface{}) (*http.Response, error)
 ```
 <b>Example:</b>

@@ -341,7 +447,7 @@ import (
    "fmt"
 	"io/ioutil"
 	"log"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -376,10 +482,10 @@ func main() {

 ```go
 // params[0] http请求header，类型必须是http.Header或者map[string]string
-// params[1] http查询字符串，类型必须是url.Values或者map[string]any
+// params[1] http查询字符串，类型必须是url.Values或者map[string]interface{}
 // params[2] post请求体，类型必须是[]byte
 // params[3] http client，类型必须是http.Client
-func HttpDelete(url string, params ...any) (*http.Response, error)
+func HttpDelete(url string, params ...interface{}) (*http.Response, error)
 ```
 <b>例子:</b>

@@ -391,7 +497,7 @@ import (
    "fmt"
 	"io/ioutil"
 	"log"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -415,10 +521,10 @@ func main() {

 ```go
 // params[0] http请求header，类型必须是http.Header或者map[string]string
-// params[1] http查询字符串，类型必须是url.Values或者map[string]any
+// params[1] http查询字符串，类型必须是url.Values或者map[string]interface{}
 // params[2] post请求体，类型必须是[]byte
 // params[3] http client，类型必须是http.Client
-func HttpPatch(url string, params ...any) (*http.Response, error)
+func HttpPatch(url string, params ...interface{}) (*http.Response, error)
 ```
 <b>例子:</b>

@@ -430,7 +536,7 @@ import (
    "fmt"
 	"io/ioutil"
 	"log"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
@@ -464,7 +570,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func ParseHttpResponse(resp *http.Response, obj any) error
+func ParseHttpResponse(resp *http.Response, obj interface{}) error
 ```
 <b>例子:</b>

@@ -476,7 +582,7 @@ import (
    "fmt"
 	"io/ioutil"
 	"log"
-    "github.com/duke-git/lancet/v2/netutil"
+    "github.com/duke-git/lancet/netutil"
 )

 func main() {
--- a/docs/random.md
+++ b/docs/random.md
@@ -5,7 +5,7 @@ Package random implements some basic functions to generate random int and string

 ## Source:

- [https://github.com/duke-git/lancet/blob/main/random/random.go](https://github.com/duke-git/lancet/blob/main/random/random.go)
+[https://github.com/duke-git/lancet/blob/v1/random/random.go](https://github.com/duke-git/lancet/blob/v1/random/random.go)


 <div STYLE="page-break-after: always;"></div>
@@ -13,7 +13,7 @@ Package random implements some basic functions to generate random int and string
 ## Usage:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )
 ```

@@ -45,7 +45,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )

 func main() {
@@ -70,7 +70,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )

 func main() {
@@ -96,7 +96,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )

 func main() {
@@ -123,7 +123,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )

 func main() {
--- a/docs/random_zh-CN.md
+++ b/docs/random_zh-CN.md
@@ -5,7 +5,7 @@ random随机数生成器包，可以生成随机[]bytes, int, string。

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/random/random.go](https://github.com/duke-git/lancet/blob/main/random/random.go)
+[https://github.com/duke-git/lancet/blob/v1/random/random.go](https://github.com/duke-git/lancet/blob/v1/random/random.go)


 <div STYLE="page-break-after: always;"></div>
@@ -13,7 +13,7 @@ random随机数生成器包，可以生成随机[]bytes, int, string。
 ## 用法:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )
 ```

@@ -46,7 +46,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )

 func main() {
@@ -71,7 +71,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )

 func main() {
@@ -97,7 +97,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )

 func main() {
@@ -123,7 +123,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )

 func main() {
--- a/docs/retry.md
+++ b/docs/retry.md
@@ -5,7 +5,7 @@ Package retry is for executing a function repeatedly until it was successful or

 ## Source:

- [https://github.com/duke-git/lancet/blob/main/retry/retry.go](https://github.com/duke-git/lancet/blob/main/retry/retry.go)
+[https://github.com/duke-git/lancet/blob/v1/retry/retry.go](https://github.com/duke-git/lancet/blob/v1/retry/retry.go)


 <div STYLE="page-break-after: always;"></div>
@@ -13,7 +13,7 @@ Package retry is for executing a function repeatedly until it was successful or
 ## Usage:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )
 ```

@@ -46,7 +46,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"github.com/duke-git/lancet/v2/retry"
+	"github.com/duke-git/lancet/retry"
 	"time"
 )

@@ -92,7 +92,7 @@ import (
    "fmt"
    "errors"
    "log"
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )

 func main() {
@@ -134,7 +134,7 @@ import (
    "fmt"
    "errors"
    "log"
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )

 func main() {
@@ -173,7 +173,7 @@ import (
    "fmt"
    "errors"
    "log"
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )

 func main() {
@@ -213,7 +213,7 @@ import (
    "fmt"
    "errors"
    "log"
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )

 func main() {
--- a/docs/retry_zh-CN.md
+++ b/docs/retry_zh-CN.md
@@ -5,7 +5,7 @@ retry重试执行函数直到函数运行成功或被context cancel。

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/retry/retry.go](https://github.com/duke-git/lancet/blob/main/retry/retry.go)
+[https://github.com/duke-git/lancet/blob/v1/retry/retry.go](https://github.com/duke-git/lancet/blob/v1/retry/retry.go)


 <div STYLE="page-break-after: always;"></div>
@@ -13,7 +13,7 @@ retry重试执行函数直到函数运行成功或被context cancel。
 ## 用法:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )
 ```

@@ -94,7 +94,7 @@ import (
    "fmt"
    "errors"
    "log"
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )

 func main() {
@@ -136,7 +136,7 @@ import (
    "fmt"
    "errors"
    "log"
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )

 func main() {
@@ -175,7 +175,7 @@ import (
    "fmt"
    "errors"
    "log"
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )

 func main() {
@@ -215,7 +215,7 @@ import (
    "fmt"
    "errors"
    "log"
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )

 func main() {
--- a/docs/slice.md
+++ b/docs/slice.md
--- a/docs/slice_zh-CN.md
+++ b/docs/slice_zh-CN.md
@@ -5,7 +5,7 @@ slice包包含操作切片的方法集合。

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/slice/slice.go](https://github.com/duke-git/lancet/blob/main/slice/slice.go)
+[https://github.com/duke-git/lancet/blob/v1/slice/slice.go](https://github.com/duke-git/lancet/blob/v1/slice/slice.go)


 <div STYLE="page-break-after: always;"></div>
@@ -13,13 +13,14 @@ slice包包含操作切片的方法集合。
 ## 用法:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/slice"
+    "github.com/duke-git/lancet/slice"
 )
 ```

 <div STYLE="page-break-after: always;"></div>

 ## 目录
+- [AppendIfAbsent](#AppendIfAbsent)
 - [Contain](#Contain)
 - [ContainSubSlice](#ContainSubSlice)
 - [Chunk](#Chunk)
@@ -28,9 +29,10 @@ import (
 - [Count](#Count)
 - [Difference](#Difference)
 - [DifferenceBy](#DifferenceBy)
- [DifferenceWith](#DifferenceWith)
- [DeleteAt](#DeleteAt)
+- [DeleteByIndex](#DeleteByIndex)
 - [Drop](#Drop)
+- [Equal](#Equal)
+- [EqualWith](#EqualWith)
 - [Every](#Every)
 - [Filter](#Filter)
 - [Find](#Find)
@@ -42,37 +44,70 @@ import (
 - [IntSlice](#IntSlice)
 - [InterfaceSlice](#InterfaceSlice)
 - [Intersection](#Intersection)
- [InsertAt](#InsertAt)
+- [InsertByIndex](#InsertByIndex)
+- [IndexOf](#IndexOf)
+- [LastIndexOf](#LastIndexOf)
 - [Map](#Map)
- [Reverse](#Reverse)
+- [ReverseSlice](#ReverseSlice)
 - [Reduce](#Reduce)
 - [Shuffle](#Shuffle)
 - [SortByField](#SortByField)
 - [Some](#Some)
 - [StringSlice](#StringSlice)
+- [ToSlice](#ToSlice)
+- [ToSlicePointer](#ToSlicePointer)
 - [Unique](#Unique)
+- [UniqueBy](#UniqueBy)
 - [Union](#Union)
- [UpdateAt](#UpdateAt)
+- [UpdateByIndex](#UpdateByIndex)
 - [Without](#Without)

 <div STYLE="page-break-after: always;"></div>

 ## 文档

+### <span id="AppendIfAbsent">AppendIfAbsent</span>
+<p>当前切片中不包含值时，将该值追加到切片中</p>
+
+<b>函数签名:</b>
+
+```go
+func AppendIfAbsent(slice interface{}, value interface{}) interface{}
+```
+<b>例子:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/slice"
+)
+
+func main() {
+	strs := []string{"a", "b"}
+	res1 := slice.AppendIfAbsent(strs, "a")
+	fmt.Println(res1) //[]string{"a", "b"}
+
+	res2 := slice.AppendIfAbsent(strs, "cannot")
+	fmt.Println(res2"}
+}
+```
+
+
+
 ### <span id="Contain">Contain</span>
 <p>判断slice是否包含value</p>

 <b>函数签名:</b>

 ```go
-func Contain[T any](slice []T, value T) bool
+func Contain(iterableType interface{}, value interface{}) bool
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -88,14 +123,14 @@ func main() {
 <b>函数签名:</b>

 ```go
-func ContainSubSlice[T any](slice, subslice []T) bool
+func ContainSubSlice(slice interface{}, subslice interface{}) bool
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -113,20 +148,20 @@ func main() {
 <b>函数签名:</b>

 ```go
-func Chunk[T any](slice []T, size int) [][]T
+func Chunk(slice []interface{}, size int) [][]interface{}
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
 	arr := []string{"a", "b", "c", "d", "e"}
 	res := slice.Chunk(InterfaceSlice(arr), 3)
-	fmt.Println(res) //[][]any{{"a", "b", "c"}, {"d", "e"}}
+	fmt.Println(res) //[][]interface{}{{"a", "b", "c"}, {"d", "e"}}
 }
 ```

@@ -138,14 +173,14 @@ func main() {
 <b>函数签名:</b>

 ```go
-func Compact[T any](slice []T) []T
+func Compact(slice interface{}) interface{}
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -161,14 +196,14 @@ func main() {
 <b>函数签名:</b>

 ```go
-func Concat[T any](slice []T, values ...[]T) []T
+func Concat(slice interface{}, values ...interface{}) interface{}
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -183,19 +218,19 @@ func main() {


 ### <span id="Count">Count</span>
-<p>遍历切片，对每个元素执行函数function. 返回符合函数返回值为true的元素的个数</p>
+<p>遍历切片，对每个元素执行函数function. 返回符合函数返回值为true的元素的个数，函数签名必须是func(index int, value interface{}) bool</p>

 <b>函数签名:</b>

 ```go
-func Count[T any](slice []T, predicate func(index int, t T) bool) int
+func Count(slice, function interface{}) int
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -218,14 +253,14 @@ func main() {
 <b>函数签名:</b>

 ```go
-func Difference[T comparable](slice, comparedSlice []T) []T
+func Difference(slice1, slice2 interface{}) interface{}
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -246,14 +281,14 @@ func main() {
 <b>函数签名:</b>

 ```go
-func DifferenceBy[T any](slice []T, comparedSlice []T, iteratee func(index int, t T) T) []T
+func DifferenceBy(slice interface{}, comparedSlice interface{}, iterateeFn interface{}) interface{}
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -270,56 +305,28 @@ func main() {



-### <span id="DifferenceWith">DifferenceWith</span>
-<p>DifferenceWith 接受比较器，该比较器被调用以将切片的元素与值进行比较。 结果值的顺序和引用由第一个切片确定</p>

-<b>函数签名:</b>
-
-```go
-func DifferenceWith[T any](slice []T, comparedSlice []T, comparator func(value, otherValue T) bool) []T
-```
-<b>例子:</b>
-
-```go
-import (
-	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
-)
-
-func main() {
-	s1 := []int{1, 2, 3, 4, 5}
-	s2 := []int{4, 5, 6, 7, 8}
-	isDouble := func(v1, v2 int) bool {
-		return v2 == 2*v1
-	}
-
-	res := slice.DifferenceWith(s1, s2, isDouble)
-	fmt.Println(res) //[]int{1, 5}
-}
-```
-
-
-### <span id="DeleteAt">DeleteAt</span>
+### <span id="DeleteByIndex">DeleteByIndex</span>
 <p>删除切片中从开始索引到结束索引-1的元素</p>

 <b>函数签名:</b>

 ```go
-func DeleteAt[T any](slice []T, start int, end ...int)
+func DeleteByIndex(slice interface{}, start int, end ...int) (interface{}, error)
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
-	res1 := slice.DeleteAt([]string{"a", "b", "c", "d", "e"}, 3)
+	res1 := slice.DeleteByIndex([]string{"a", "b", "c", "d", "e"}, 3)
 	fmt.Println(res1) //[]string{"a", "b", "c", "e"}

-	res2 := slice.DeleteAt([]string{"a", "b", "c", "d", "e"}, 0, 2)
+	res2 := slice.DeleteByIndex([]string{"a", "b", "c", "d", "e"}, 0, 2)
 	fmt.Println(res2) //[]string{"c", "d", "e"}

 }
@@ -334,14 +341,14 @@ func main() {
 <b>函数签名:</b>

 ```go
-func Drop[T any](slice []T, n int) []T
+func Drop(slice interface{}, n int) interface{}
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -358,21 +365,83 @@ func main() {



-
-### <span id="Every">Every</span>
-<p>如果切片中的所有值都通过谓词函数，则返回true。 函数签名应该是func(index int, value any) bool</p>
+### <span id="Equal">Equal</span>
+<p>检查两个切片是否相等，相等条件：切片长度相同，元素顺序和值都相同</p>

 <b>函数签名:</b>

 ```go
-func Every[T any](slice []T, predicate func(index int, t T) bool) bool
+func Equal(slice1, slice2 interface{}) bool
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
+)
+
+func main() {
+	slice1 := []int{1, 2, 3}
+	slice2 := []int{1, 2, 3}
+	slice3 := []int{3, 2, 1}
+
+	res1 := slice.Equal(slice1, slice2)
+	res2 := slice.Equal(slice1, slice3)
+
+	fmt.Println(res1) //true
+	fmt.Println(res2) //false
+}
+```
+
+
+
+### <span id="EqualWith">EqualWith</span>
+<p>检查两个切片是否相等，相等条件：对两个切片的元素调用比较函数comparator，返回true。 comparator函数签名: func(a interface{}, b interface{}) bool</p>
+
+<b>函数签名:</b>
+
+```go
+func EqualWith(slice1, slice2 interface{}, comparator interface{}) bool
+```
+<b>例子:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/slice"
+)
+
+func main() {
+	slice1 := []int{1, 2, 3}
+	slice2 := []int{2, 4, 6}
+
+	isDouble := func(a, b int) bool {
+		return b == a*2
+	}
+
+	res := slice.EqualWith(slice1, slice2, isDouble)
+
+	fmt.Println(res) //true
+}
+```
+
+
+
+### <span id="Every">Every</span>
+<p>如果切片中的所有值都通过谓词函数，则返回true。 函数签名应该是func(index int, value interface{}) bool</p>
+
+<b>函数签名:</b>
+
+```go
+func Every(slice, function interface{}) bool
+```
+<b>例子:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -390,19 +459,19 @@ func main() {


 ### <span id="Filter">Filter</span>
-<p>返回与函数匹配的所有元素。 函数签名应该是 func(index int, value any) bool</p>
+<p>返回与函数匹配的所有元素。 函数签名应该是 func(index int, value interface{}) bool</p>

 <b>函数签名:</b>

 ```go
-func Filter[T any](slice []T, predicate func(index int, t T) bool) []T
+func Filter(slice, function interface{}) interface{}
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -419,19 +488,19 @@ func main() {


 ### <span id="Find">Find</span>
-<p>遍历slice的元素，返回第一个通过function真值测试的元素</p>
+<p>遍历slice的元素，返回第一个通过function真值测试的元素。函数签名应该是 func(index int, value interface{}) bool</p>

 <b>函数签名:</b>

 ```go
-func Find[T any](slice []T, predicate func(index int, t T) bool) (*T, bool)
+func Find(slice, function interface{}) (interface{}, bool)
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -450,19 +519,19 @@ func main() {


 ### <span id="FindLast">FindLast</span>
-<p>从头到尾遍历 slice 的元素，返回最后一个通过函数真值测试的元素。</p>
+<p>从头到尾遍历 slice 的元素，返回最后一个通过函数真值测试的元素。 函数签名应该是 func(index int, value interface{}) bool。</p>

 <b>函数签名:</b>

 ```go
-func FindLast[T any](slice []T, predicate func(index int, t T) bool) (*T, bool)
+func FindLast(slice, function interface{}) (interface{}, bool)
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -485,14 +554,14 @@ func main() {
 <b>函数签名:</b>

 ```go
-func FlattenDeep(slice any) any
+func FlattenDeep(slice interface{}) interface{}
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -507,19 +576,19 @@ func main() {


 ### <span id="ForEach">ForEach</span>
-<p>遍历slice的元素并为每个元素调用函数</p>
+<p>遍历slice的元素并为每个元素调用函数，函数签名应该是func(index int, value interface{})</p>

 <b>函数签名:</b>

 ```go
-func ForEach[T any](slice []T, iteratee func(index int, t T))
+func ForEach(slice, function interface{})
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -536,19 +605,19 @@ func main() {


 ### <span id="GroupBy">GroupBy</span>
-<p>迭代切片的元素，每个元素将按条件分组，返回两个切片</p>
+<p>迭代切片的元素，每个元素将按条件分组，返回两个切片。 函数签名应该是func(index int, value interface{}) bool</p>

 <b>函数签名:</b>

 ```go
-func GroupBy[T any](slice []T, groupFn func(index int, t T) bool) ([]T, []T)
+func GroupBy(slice, function interface{}) (interface{}, interface{})
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -572,18 +641,18 @@ func main() {
 <b>函数签名:</b>

 ```go
-func IntSlice(slice any) []int
+func IntSlice(slice interface{}) []int
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
-	var nums = []any{1, 2, 3}
+	var nums = []interface{}{1, 2, 3}
 	res := slice.IntSlice(nums)
 	fmt.Println(res) //[]int{1, 2, 3}
 }
@@ -598,20 +667,20 @@ func main() {
 <b>函数签名:</b>

 ```go
-func InterfaceSlice(slice any) []any
+func InterfaceSlice(slice interface{}) []interface{}
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
 	var nums = []int{}{1, 2, 3}
 	res := slice.InterfaceSlice(nums)
-	fmt.Println(res) //[]any{1, 2, 3}
+	fmt.Println(res) //[]interface{}{1, 2, 3}
 }
 ```

@@ -624,14 +693,14 @@ func main() {
 <b>函数签名:</b>

 ```go
-func Intersection[T any](slices ...[]T) []T
+func Intersection(slices ...interface{}) interface{}
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -645,30 +714,85 @@ func main() {



-
-### <span id="InsertAt">InsertAt</span>
-<p>将元素插入到索引处的切片中</p>
+### <span id="IndexOf">IndexOf</span>
+<p>返回在切片中找到值的第一个匹配项的索引，如果找不到值，则返回-1</p>

 <b>函数签名:</b>

 ```go
-func InsertAt[T any](slice []T, index int, value any) []T
+func IndexOf(slice, value interface{}) int
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
+)
+
+func main() {
+	arr := []string{"a", "a", "b", "c"}
+	res1 := slice.IndexOf(arr, "a")
+	fmt.Println(res1) //0
+
+	res2 := slice.IndexOf(arr, "d")
+	fmt.Println(res2) //-1
+}
+```
+
+
+
+### <span id="LastIndexOf">LastIndexOf</span>
+<p>返回在切片中找到最后一个值的索引，如果找不到该值，则返回-1</p>
+
+<b>函数签名:</b>
+
+```go
+func LastIndexOf(slice, value interface{}) int
+```
+<b>例子:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/slice"
+)
+
+func main() {
+	arr := []string{"a", "a", "b", "c"}
+	res1 := slice.LastIndexOf(arr, "a")
+	fmt.Println(res1) //1
+
+	res2 := slice.LastIndexOf(arr, "d")
+	fmt.Println(res2) //-1
+}
+```
+
+
+
+### <span id="InsertByIndex">InsertByIndex</span>
+<p>将元素插入到索引处的切片中</p>
+
+<b>函数签名:</b>
+
+```go
+func InsertByIndex(slice interface{}, index int, value interface{}) (interface{}, error)
+```
+<b>例子:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
 	s := []string{"a", "b", "c"}
 	
-	res1, _ := slice.InsertAt(s, 0, "1")
+	res1, _ := slice.InsertByIndex(s, 0, "1")
 	fmt.Println(res1) //[]string{"1", "a", "b", "c"}

-	res2, _ := slice.InsertAt(s, 3, []string{"1", "2", "3"})
+	res2, _ := slice.InsertByIndex(s, 3, []string{"1", "2", "3"})
 	fmt.Println(res2) //[]string{"a", "b", "c", "1", "2", "3"}
 }
 ```
@@ -677,19 +801,19 @@ func main() {


 ### <span id="Map">Map</span>
-<p>通过运行函数slice中的每个元素来创建一个新切片</p>
+<p>通过运行函数slice中的每个元素来创建一个值切片，函数签名应该是func(index int, value interface{}) interface{}。</p>

 <b>函数签名:</b>

 ```go
-func Map[T any, U any](slice []T, iteratee func(index int, t T) U) []U
+func Map(slice, function interface{}) interface{}
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -705,25 +829,25 @@ func main() {



-### <span id="Reverse">Reverse</span>
+### <span id="ReverseSlice">ReverseSlice</span>
 <p>反转切片中的元素顺序</p>

 <b>函数签名:</b>

 ```go
-func Reverse[T any](slice []T)
+func ReverseSlice(slice interface{})
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
 	nums := []int{1, 2, 3, 4}
-	slice.Reverse(nums)
+	slice.ReverseSlice(nums)
 	fmt.Println(res) //[]int{4, 3, 2, 1}
 }
 ```
@@ -731,19 +855,19 @@ func main() {


 ### <span id="Reduce">Reduce</span>
-<p>将slice中的元素依次运行函数，返回运行结果</p>
+<p>将slice中的元素运行函数，返回运行结果。函数签名应该是func(index int, value1, value2 interface{}) interface{}。</p>

 <b>函数签名:</b>

 ```go
-func Reduce[T any](slice []T, iteratee func(index int, t1, t2 T) T, initial T) T
+func Reduce(slice, function, zero interface{}) interface{}
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -765,14 +889,14 @@ func main() {
 <b>函数签名:</b>

 ```go
-func Shuffle[T any](slice []T) []T
+func Shuffle(slice interface{}) interface{}
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -790,14 +914,14 @@ func main() {
 <b>函数签名:</b>

 ```go
-func SortByField(slice any, field string, sortType ...string) error
+func SortByField(slice interface{}, field string, sortType ...string) error
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -828,19 +952,19 @@ func main() {


 ### <span id="Some">Some</span>
-<p>如果列表中的任何值通过谓词函数，则返回true</p>
+<p>如果列表中的任何值通过谓词函数，则返回true，函数签名应该是func(index int, value interface{}) bool .</p>

 <b>函数签名:</b>

 ```go
-func Some[T any](slice []T, predicate func(index int, t T) bool) bool
+func Some(slice, function interface{}) bool
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -862,7 +986,32 @@ func main() {
 <b>函数签名:</b>

 ```go
-func StringSlice(slice any) []string
+func StringSlice(slice interface{}) []string
+```
+<b>例子:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/slice"
+)
+
+func main() {
+	var s = []interface{}{"a", "b", "c"}
+	res := slice.StringSlice(s)
+	fmt.Println(res) //[]string{"a", "b", "c"}
+}
+```
+
+
+
+### <span id="ToSlice">ToSlice</span>
+<p>将可变参数转为切片</p>
+
+<b>函数签名:</b>
+
+```go
+func ToSlice(value ...interface{}) interface{}
 ```
 <b>例子:</b>

@@ -873,14 +1022,38 @@ import (
 )

 func main() {
-	var s = []any{"a", "b", "c"}
-	res := slice.StringSlice(s)
-	fmt.Println(res) //[]string{"a", "b", "c"}
+	res := slice.ToSlice("a", "b")
+	fmt.Println(res) //{"a", "b"}
 }
 ```



+### <span id="ToSlicePointer">ToSlicePointer</span>
+<p>将可变参数转为指针切片</p>
+
+<b>函数签名:</b>
+
+```go
+func ToSlicePointer(value ...interface{}) []*interface{}
+```
+<b>例子:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/v2/slice"
+)
+
+func main() {
+	str1 := "a"
+	str2 := "b"
+	res := slice.ToSlicePointer(str1, str2)
+	fmt.Println(res) // res -> []*string{&str1, &str2}
+}
+```
+
+

 ### <span id="Unique">Unique</span>
 <p>删除切片中的重复元素</p>
@@ -888,14 +1061,14 @@ func main() {
 <b>函数签名:</b>

 ```go
-func Unique[T any](slice []T) []T
+func Unique(slice interface{}) interface{}
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -906,20 +1079,45 @@ func main() {



-### <span id="Union">Unique</span>
-<p>从所有给定的切片按顺序创建一个唯一值切片。 使用 == 进行相等比较。</p>
+### <span id="UniqueBy">UniqueBy</span>
+<p>对切片的每个项目调用iteratee函数，然后删除重复的</p>

 <b>函数签名:</b>

 ```go
-func Union[T any](slices ...[]T) []T
+func UniqueBy(slice, iteratee interface{}) interface{}
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
+)
+
+func main() {
+	res := slice.UniqueBy([]int{1, 2, 3, 4, 5, 6}, func(val int) int {
+		return val % 4
+	})
+	fmt.Println(res) //[]int{1, 2, 3, 0}
+}
+```
+
+
+### <span id="Union">Union</span>
+<p>从所有给定的切片按顺序创建一个唯一值切片。 使用 == 进行相等比较。</p>
+
+<b>函数签名:</b>
+
+```go
+func Union(slices ...interface{}) interface{}
+```
+<b>例子:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
@@ -933,26 +1131,26 @@ func main() {



-### <span id="UpdateAt">UpdateAt</span>
+### <span id="UpdateByIndex">UpdateByIndex</span>
 <p>更新索引处的切片元素。 如果 param index < 0 或 index >= len(slice)，将返回错误</p>

 <b>函数签名:</b>

 ```go
-func UpdateAt[T any](slice []T, index int, value T) []T
+func UpdateByIndex(slice interface{}, index int, value interface{}) (interface{}, error)
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
 	s := []string{"a", "b", "c"}
 	
-	res1, _ := slice.UpdateAt(s, 0, "1")
+	res1, _ := slice.UpdateByIndex(s, 0, "1")
 	fmt.Println(res1) //[]string{"1", "b", "c"}
 }
 ```
@@ -966,14 +1164,14 @@ func main() {
 <b>函数签名:</b>

 ```go
-func Without[T any](slice []T, values ...T) []T
+func Without(slice interface{}, values ...interface{}) interface{}
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/slice"
+	"github.com/duke-git/lancet/slice"
 )

 func main() {
--- a/docs/strutil.md
+++ b/docs/strutil.md
@@ -5,7 +5,7 @@ Package strutil contains some functions to manipulate string.

 ## Source:

- [https://github.com/duke-git/lancet/blob/main/strutil/string.go](https://github.com/duke-git/lancet/blob/main/strutil/string.go)
+[https://github.com/duke-git/lancet/blob/v1/strutil/string.go](https://github.com/duke-git/lancet/blob/v1/strutil/string.go)


 <div STYLE="page-break-after: always;"></div>
@@ -13,7 +13,7 @@ Package strutil contains some functions to manipulate string.
 ## Usage:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/strutil"
+    "github.com/duke-git/lancet/strutil"
 )
 ```

@@ -35,8 +35,9 @@ import (
 - [ReverseStr](#ReverseStr)
 - [SnakeCase](#SnakeCase)
 - [Wrap](#Wrap)
-  
+
 - [Unwrap](#Unwrap)
+- [SplitEx](#SplitEx)
  

 <div STYLE="page-break-after: always;"></div>
@@ -57,7 +58,7 @@ func After(s, char string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -87,7 +88,7 @@ func AfterLast(s, char string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -118,7 +119,7 @@ func Before(s, char string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -149,7 +150,7 @@ func BeforeLast(s, char string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -180,7 +181,7 @@ func CamelCase(s string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -214,7 +215,7 @@ func Capitalize(s string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -237,14 +238,14 @@ func main() {
 <b>Signature:</b>

 ```go
-func IsString(v any) bool
+func IsString(v interface{}) bool
 ```
 <b>Example:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -272,7 +273,7 @@ func KebabCase(s string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -306,7 +307,7 @@ func LowerFirst(s string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -340,7 +341,7 @@ func UpperFirst(s string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -374,7 +375,7 @@ func PadEnd(source string, size int, padStr string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -408,7 +409,7 @@ func PadStart(source string, size int, padStr string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -442,7 +443,7 @@ func ReverseStr(s string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -469,7 +470,7 @@ func SnakeCase(s string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -506,7 +507,7 @@ func Wrap(str string, wrapWith string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -543,7 +544,7 @@ func Unwrap(str string, wrapToken string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -566,7 +567,39 @@ func main() {



-
+### <span id="SplitEx">SplitEx</span>
+<p>Split a given string whether the result contains empty string.</p>
+
+<b>Signature:</b>
+
+```go
+func SplitEx(s, sep string, removeEmptyString bool) []string
+```
+<b>Example:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/strutil"
+)
+
+func main() {
+	arr1 := strutil.SplitEx(" a b c ", "", true)
+	fmt.Println(arr1) //[]string{}
+
+	arr2 := strutil.SplitEx(" a b c ", " ", false)
+	fmt.Println(arr2) //[]string{"", "a", "b", "c", ""}
+
+	arr3 := strutil.SplitEx(" a b c ", " ", true)
+	fmt.Println(arr3) //[]string{"a", "b", "c"}
+
+	arr4 := strutil.SplitEx(" a = b = c = ", " = ", false)
+	fmt.Println(arr4) //[]string{" a", "b", "c", ""}
+
+	arr5 := strutil.SplitEx(" a = b = c = ", " = ", true)
+	fmt.Println(arr5) //[]string{" a", "b", "c"}
+}
+```



--- a/docs/strutil_zh-CN.md
+++ b/docs/strutil_zh-CN.md
@@ -5,7 +5,7 @@ strutil包含处理字符串的相关函数。

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/strutil/string.go](https://github.com/duke-git/lancet/blob/main/strutil/string.go)
+[https://github.com/duke-git/lancet/blob/v1/strutil/string.go](https://github.com/duke-git/lancet/blob/v1/strutil/string.go)


 <div STYLE="page-break-after: always;"></div>
@@ -13,7 +13,7 @@ strutil包含处理字符串的相关函数。
 ## 用法:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/strutil"
+    "github.com/duke-git/lancet/strutil"
 )
 ```

@@ -37,6 +37,7 @@ import (
 - [Wrap](#Wrap)
  
 - [Unwrap](#Unwrap)
+- [SplitEx](#SplitEx)
  

 <div STYLE="page-break-after: always;"></div>
@@ -58,7 +59,7 @@ func After(s, char string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -88,7 +89,7 @@ func AfterLast(s, char string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -119,7 +120,7 @@ func Before(s, char string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -150,7 +151,7 @@ func BeforeLast(s, char string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -181,7 +182,7 @@ func CamelCase(s string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -215,7 +216,7 @@ func Capitalize(s string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -238,14 +239,14 @@ func main() {
 <b>函数签名:</b>

 ```go
-func IsString(v any) bool
+func IsString(v interface{}) bool
 ```
 <b>例子:</b>

 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -273,7 +274,7 @@ func KebabCase(s string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -307,7 +308,7 @@ func LowerFirst(s string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -341,7 +342,7 @@ func UpperFirst(s string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -375,7 +376,7 @@ func PadEnd(source string, size int, padStr string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -409,7 +410,7 @@ func PadStart(source string, size int, padStr string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -443,7 +444,7 @@ func ReverseStr(s string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -470,7 +471,7 @@ func SnakeCase(s string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -507,7 +508,7 @@ func Wrap(str string, wrapWith string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -544,7 +545,7 @@ func Unwrap(str string, wrapToken string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/strutil"
+	"github.com/duke-git/lancet/strutil"
 )

 func main() {
@@ -567,6 +568,39 @@ func main() {



+### <span id="SplitEx">SplitEx</span>
+<p>分割字符串为切片，removeEmptyString参数指定是否去除空字符串</p>
+
+<b>函数签名:</b>
+
+```go
+func SplitEx(s, sep string, removeEmptyString bool) []string
+```
+<b>例子:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/strutil"
+)
+
+func main() {
+	arr1 := strutil.SplitEx(" a b c ", "", true)
+	fmt.Println(arr1) //[]string{}
+
+	arr2 := strutil.SplitEx(" a b c ", " ", false)
+	fmt.Println(arr2) //[]string{"", "a", "b", "c", ""}
+
+	arr3 := strutil.SplitEx(" a b c ", " ", true)
+	fmt.Println(arr3) //[]string{"a", "b", "c"}
+
+	arr4 := strutil.SplitEx(" a = b = c = ", " = ", false)
+	fmt.Println(arr4) //[]string{" a", "b", "c", ""}
+
+	arr5 := strutil.SplitEx(" a = b = c = ", " = ", true)
+	fmt.Println(arr5) //[]string{" a", "b", "c"}
+}
+```



--- a/docs/system.md
+++ b/docs/system.md
@@ -5,7 +5,7 @@ Package system contains some functions about os, runtime, shell command.

 ## Source:

- [https://github.com/duke-git/lancet/blob/main/system/os.go](https://github.com/duke-git/lancet/blob/main/system/os.go)
+[https://github.com/duke-git/lancet/blob/v1/system/os.go](https://github.com/duke-git/lancet/blob/v1/system/os.go)


 <div STYLE="page-break-after: always;"></div>
@@ -13,7 +13,7 @@ Package system contains some functions about os, runtime, shell command.
 ## Usage:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/system"
+    "github.com/duke-git/lancet/system"
 )
 ```

@@ -28,6 +28,7 @@ import (
 - [RemoveOsEnv](#RemoveOsEnv)
 - [CompareOsEnv](#CompareOsEnv)
 - [ExecCommand](#ExecCommand)
+- [GetOsBits](#GetOsBits)
  

 <div STYLE="page-break-after: always;"></div>
@@ -48,7 +49,7 @@ func IsWindows() bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+	"github.com/duke-git/lancet/system"
 )

 func main() {
@@ -73,7 +74,7 @@ func IsLinux() bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+	"github.com/duke-git/lancet/system"
 )

 func main() {
@@ -97,7 +98,7 @@ func IsMac() bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+	"github.com/duke-git/lancet/system"
 )

 func main() {
@@ -121,7 +122,7 @@ func GetOsEnv(key string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+	"github.com/duke-git/lancet/system"
 )

 func main() {
@@ -145,7 +146,7 @@ func SetOsEnv(key, value string) error
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+	"github.com/duke-git/lancet/system"
 )

 func main() {
@@ -170,7 +171,7 @@ func RemoveOsEnv(key string) error
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+	"github.com/duke-git/lancet/system"
 )

 func main() {
@@ -196,7 +197,7 @@ func CompareOsEnv(key, comparedEnv string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+	"github.com/duke-git/lancet/system"
 )

 func main() {
@@ -222,7 +223,7 @@ func ExecCommand(command string) (stdout, stderr string, err error)
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+	"github.com/duke-git/lancet/system"
 )

 func main() {
@@ -235,7 +236,27 @@ func main() {



-
+### <span id="GetOsBits">GetOsBits</span>
+<p>获取当前操作系统位数，返回32或64</p>
+
+<b>函数签名:</b>
+
+```go
+func GetOsBits() int
+```
+<b>例子:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/system"
+)
+
+func main() {
+	osBit := system.GetOsBits()
+	fmt.Println(osBit) 
+}
+```



--- a/docs/system_zh-CN.md
+++ b/docs/system_zh-CN.md
@@ -5,7 +5,7 @@ system包含os, runtime, shell command相关函数。

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/system/os.go](https://github.com/duke-git/lancet/blob/main/system/os.go)
+[https://github.com/duke-git/lancet/blob/v1/system/os.go](https://github.com/duke-git/lancet/blob/v1/system/os.go)


 <div STYLE="page-break-after: always;"></div>
@@ -13,7 +13,7 @@ system包含os, runtime, shell command相关函数。
 ## 用法:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/system"
+    "github.com/duke-git/lancet/system"
 )
 ```

@@ -28,6 +28,7 @@ import (
 - [RemoveOsEnv](#RemoveOsEnv)
 - [CompareOsEnv](#CompareOsEnv)
 - [ExecCommand](#ExecCommand)
+- [GetOsBits](#GetOsBits)
  

 <div STYLE="page-break-after: always;"></div>
@@ -48,7 +49,7 @@ func IsWindows() bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+	"github.com/duke-git/lancet/system"
 )

 func main() {
@@ -73,7 +74,7 @@ func IsLinux() bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+	"github.com/duke-git/lancet/system"
 )

 func main() {
@@ -97,7 +98,7 @@ func IsMac() bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+	"github.com/duke-git/lancet/system"
 )

 func main() {
@@ -121,7 +122,7 @@ func GetOsEnv(key string) string
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+	"github.com/duke-git/lancet/system"
 )

 func main() {
@@ -145,7 +146,7 @@ func SetOsEnv(key, value string) error
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+	"github.com/duke-git/lancet/system"
 )

 func main() {
@@ -170,7 +171,7 @@ func RemoveOsEnv(key string) error
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+	"github.com/duke-git/lancet/system"
 )

 func main() {
@@ -196,7 +197,7 @@ func CompareOsEnv(key, comparedEnv string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+	"github.com/duke-git/lancet/system"
 )

 func main() {
@@ -222,7 +223,7 @@ func ExecCommand(command string) (stdout, stderr string, err error)
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+	"github.com/duke-git/lancet/system"
 )

 func main() {
@@ -235,7 +236,27 @@ func main() {



-
+### <span id="GetOsBits">GetOsBits</span>
+<p>Get current os bits, 32bit or 64bit. return 32 or 64</p>
+
+<b>Signature:</b>
+
+```go
+func GetOsBits() int
+```
+<b>Example:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/system"
+)
+
+func main() {
+	osBit := system.GetOsBits()
+	fmt.Println(osBit) 
+}
+```



--- a/docs/validator.md
+++ b/docs/validator.md
@@ -5,7 +5,7 @@ Package validator contains some functions for data validation.

 ## Source:

- [https://github.com/duke-git/lancet/blob/main/validator/validator.go](https://github.com/duke-git/lancet/blob/main/validator/validator.go)
+[https://github.com/duke-git/lancet/blob/v1/validator/validator.go](https://github.com/duke-git/lancet/blob/v1/validator/validator.go)


 <div STYLE="page-break-after: always;"></div>
@@ -13,7 +13,7 @@ Package validator contains some functions for data validation.
 ## Usage:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/validator"
+    "github.com/duke-git/lancet/validator"
 )
 ```

@@ -67,7 +67,7 @@ func ContainChinese(s string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -97,7 +97,7 @@ func ContainLetter(str string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -128,7 +128,7 @@ func ContainLower(str string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -159,7 +159,7 @@ func ContainUpper(str string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -190,7 +190,7 @@ func IsAlpha(s string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -218,7 +218,7 @@ func IsAllUpper(str string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -246,7 +246,7 @@ func IsAllLower(str string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -274,7 +274,7 @@ func IsBase64(base64 string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -302,7 +302,7 @@ func IsChineseMobile(mobileNum string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -329,7 +329,7 @@ func IsChineseIdNum(id string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -357,7 +357,7 @@ func IsChinesePhone(phone string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -385,7 +385,7 @@ func IsCreditCard(creditCart string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -413,7 +413,7 @@ func IsDns(dns string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -444,7 +444,7 @@ func IsEmail(email string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -473,7 +473,7 @@ func IsEmptyString(s string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -501,7 +501,7 @@ func IsFloatStr(s string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -530,7 +530,7 @@ func IsNumberStr(s string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -559,7 +559,7 @@ func IsJSON(str string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -588,7 +588,7 @@ func IsRegexMatch(s, regex string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -614,7 +614,7 @@ func IsIntStr(s string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -641,7 +641,7 @@ func IsIp(ipstr string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -668,7 +668,7 @@ func IsIpV4(ipstr string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -695,7 +695,7 @@ func IsIpV6(ipstr string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -722,7 +722,7 @@ func IsStrongPassword(password string, length int) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -750,7 +750,7 @@ func IsUrl(str string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -778,7 +778,7 @@ func IsWeakPassword(password string, length int) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
--- a/docs/validator_zh-CN.md
+++ b/docs/validator_zh-CN.md
@@ -5,7 +5,7 @@ validator验证器包，包含常用字符串格式验证函数。

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/validator/validator.go](https://github.com/duke-git/lancet/blob/main/validator/validator.go)
+[https://github.com/duke-git/lancet/blob/v1/validator/validator.go](https://github.com/duke-git/lancet/blob/v1/validator/validator.go)


 <div STYLE="page-break-after: always;"></div>
@@ -13,7 +13,7 @@ validator验证器包，包含常用字符串格式验证函数。
 ## 用法:
 ```go
 import (
-    "github.com/duke-git/lancet/v2/validator"
+    "github.com/duke-git/lancet/validator"
 )
 ```

@@ -67,7 +67,7 @@ func ContainChinese(s string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -97,7 +97,7 @@ func ContainLetter(str string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -128,7 +128,7 @@ func ContainLower(str string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -159,7 +159,7 @@ func ContainUpper(str string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -190,7 +190,7 @@ func IsAlpha(s string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -218,7 +218,7 @@ func IsAllUpper(str string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -246,7 +246,7 @@ func IsAllLower(str string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -274,7 +274,7 @@ func IsBase64(base64 string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -302,7 +302,7 @@ func IsChineseMobile(mobileNum string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -329,7 +329,7 @@ func IsChineseIdNum(id string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -357,7 +357,7 @@ func IsChinesePhone(phone string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -385,7 +385,7 @@ func IsCreditCard(creditCart string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -413,7 +413,7 @@ func IsDns(dns string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -444,7 +444,7 @@ func IsEmail(email string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -473,7 +473,7 @@ func IsEmptyString(s string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -501,7 +501,7 @@ func IsFloatStr(s string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -530,7 +530,7 @@ func IsNumberStr(s string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -559,7 +559,7 @@ func IsJSON(str string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -588,7 +588,7 @@ func IsRegexMatch(s, regex string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -614,7 +614,7 @@ func IsIntStr(s string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -641,7 +641,7 @@ func IsIp(ipstr string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -668,7 +668,7 @@ func IsIpV4(ipstr string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -695,7 +695,7 @@ func IsIpV6(ipstr string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -722,7 +722,7 @@ func IsStrongPassword(password string, length int) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -750,7 +750,7 @@ func IsUrl(str string) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
@@ -778,7 +778,7 @@ func IsWeakPassword(password string, length int) bool
 ```go
 import (
 	"fmt"
-	"github.com/duke-git/lancet/v2/validator"
+	"github.com/duke-git/lancet/validator"
 )

 func main() {
--- a/docs/xerror.md
+++ b/docs/xerror.md
@@ -1,57 +0,0 @@
-# Xerror
-Package xerror implements helpers for errors.
-
-<div STYLE="page-break-after: always;"></div>
-
-## Source:
-
- [https://github.com/duke-git/lancet/blob/main/xerror/xerror.go](https://github.com/duke-git/lancet/blob/main/xerror/xerror.go)
-
-<div STYLE="page-break-after: always;"></div>
-
-## Usage:
-```go
-import (
-    "github.com/duke-git/lancet/v2/xerror"
-)
-```
-
-<div STYLE="page-break-after: always;"></div>
-
-## Index
- [Unwrap](#Unwrap)
-
-<div STYLE="page-break-after: always;"></div>
-
-## Documentation
-
-
-
-### <span id="Unwrap">Unwrap</span>
-<p>Unwrap if err is nil then it returns a valid value. If err is not nil, Unwrap panics with err.</p>
-
-<b>Signature:</b>
-
-```go
-func Unwrap[T any](val T, err error) T
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/xerror"
-)
-
-func main() {
-    _, err := strconv.Atoi("4o2")
-	defer func() {
-		v := recover()
-		fmt.Println(err.Error()) // err.Error() == v.(*strconv.NumError).Error()
-	}()
-
-	xerror.Unwrap(strconv.Atoi("4o2"))
-}
-```
--- a/docs/xerror_zh-CN.md
+++ b/docs/xerror_zh-CN.md
@@ -1,57 +0,0 @@
-# Xerror
-xerror错误处理逻辑封装
-
-<div STYLE="page-break-after: always;"></div>
-
-## 源码:
-
- [https://github.com/duke-git/lancet/blob/main/xerror/xerror.go](https://github.com/duke-git/lancet/blob/main/xerror/xerror.go)
-
-<div STYLE="page-break-after: always;"></div>
-
-## 用法:
-```go
-import (
-    "github.com/duke-git/lancet/v2/xerror"
-)
-```
-
-<div STYLE="page-break-after: always;"></div>
-
-## 目录
- [Unwrap](#Unwrap)
-
-<div STYLE="page-break-after: always;"></div>
-
-## 文档
-
-
-
-### <span id="Unwrap">Unwrap</span>
-<p>如果err为nil则展开，则它返回一个有效值。 如果err不是nil则Unwrap使用err发生恐慌。</p>
-
-<b>函数签名:</b>
-
-```go
-func Unwrap[T any](val T, err error) T
-```
-<b>例子:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/xerror"
-)
-
-func main() {
-    _, err := strconv.Atoi("4o2")
-	defer func() {
-		v := recover()
-		fmt.Println(err.Error()) // err.Error() == v.(*strconv.NumError).Error()
-	}()
-
-	xerror.Unwrap(strconv.Atoi("4o2"))
-}
-```
--- a/fileutil/file.go
+++ b/fileutil/file.go
@@ -13,6 +13,7 @@ import (
 	"io/ioutil"
 	"net/http"
 	"os"
+	"path"
 	"path/filepath"
 	"strings"
 )
@@ -40,6 +41,11 @@ func CreateFile(path string) bool {
 	return true
 }

+// CreateDir create directory in absolute path. param `absPath` like /a/, /a/b/
+func CreateDir(absPath string) error {
+	return os.MkdirAll(path.Dir(absPath), os.ModePerm)
+}
+
 // IsDir checks if the path is directory or not
 func IsDir(path string) bool {
 	file, err := os.Stat(path)
@@ -263,7 +269,7 @@ func FileMode(path string) (fs.FileMode, error) {

 // MiMeType return file mime type
 // param `file` should be string(file path) or *os.File
-func MiMeType(file any) string {
+func MiMeType(file interface{}) string {
 	var mediatype string

 	readBuffer := func(f *os.File) ([]byte, error) {
--- a/fileutil/file_test.go
+++ b/fileutil/file_test.go
@@ -4,7 +4,7 @@ import (
 	"os"
 	"testing"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestIsExist(t *testing.T) {
@@ -33,6 +33,27 @@ func TestCreateFile(t *testing.T) {
 	os.Remove(f)
 }

+func TestCreateDir(t *testing.T) {
+	assert := internal.NewAssert(t, "TestCreateDir")
+
+	pwd, err := os.Getwd()
+	if err != nil {
+		t.Error(err)
+		t.FailNow()
+	}
+
+	dirPath := pwd + "/a/"
+	err = CreateDir(dirPath)
+	if err != nil {
+		t.Error(err)
+		t.FailNow()
+	}
+
+	assert.Equal(true, IsExist(dirPath))
+	os.Remove(dirPath)
+	assert.Equal(false, IsExist(dirPath))
+}
+
 func TestIsDir(t *testing.T) {
 	assert := internal.NewAssert(t, "TestIsDir")

@@ -79,7 +100,7 @@ func TestListFileNames(t *testing.T) {
 	filesInPath, err := ListFileNames("../datetime/")
 	assert.IsNil(err)

-	expected := []string{"datetime.go", "datetime_test.go"}
+	expected := []string{"conversion.go", "conversion_test.go", "datetime.go", "datetime_test.go"}
 	assert.Equal(expected, filesInPath)
 }

--- a/formatter/formatter.go
+++ b/formatter/formatter.go
@@ -7,7 +7,7 @@ package formatter
 import "strings"

 // Comma add comma to number by every 3 numbers from right. ahead by symbol char
-func Comma(v any, symbol string) string {
+func Comma(v interface{}, symbol string) string {
 	s := numString(v)
 	dotIndex := strings.Index(s, ".")
 	if dotIndex != -1 {
--- a/formatter/formatter_internal.go
+++ b/formatter/formatter_internal.go
@@ -14,7 +14,7 @@ func commaString(s string) string {
 	return commaString(s[:len(s)-3]) + "," + commaString(s[len(s)-3:])
 }

-func numString(value any) string {
+func numString(value interface{}) string {
 	switch reflect.TypeOf(value).Kind() {
 	case reflect.Int, reflect.Int64, reflect.Float32, reflect.Float64:
 		return fmt.Sprintf("%v", value)
--- a/formatter/formatter_test.go
+++ b/formatter/formatter_test.go
@@ -3,7 +3,7 @@ package formatter
 import (
 	"testing"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestComma(t *testing.T) {
--- a/function/function.go
+++ b/function/function.go
@@ -10,11 +10,11 @@ import (
 )

 // After creates a function that invokes func once it's called n or more times
-func After(n int, fn any) func(args ...any) []reflect.Value {
+func After(n int, fn interface{}) func(args ...interface{}) []reflect.Value {
 	// Catch programming error while constructing the closure
 	mustBeFunction(fn)

-	return func(args ...any) []reflect.Value {
+	return func(args ...interface{}) []reflect.Value {
 		n--
 		if n < 1 {
 			return unsafeInvokeFunc(fn, args...)
@@ -24,11 +24,11 @@ func After(n int, fn any) func(args ...any) []reflect.Value {
 }

 // Before creates a function that invokes func once it's called less than n times
-func Before(n int, fn any) func(args ...any) []reflect.Value {
+func Before(n int, fn interface{}) func(args ...interface{}) []reflect.Value {
 	// Catch programming error while constructing the closure
 	mustBeFunction(fn)
 	var res []reflect.Value
-	return func(args ...any) []reflect.Value {
+	return func(args ...interface{}) []reflect.Value {
 		if n > 0 {
 			res = unsafeInvokeFunc(fn, args...)
 		}
@@ -40,20 +40,20 @@ func Before(n int, fn any) func(args ...any) []reflect.Value {
 	}
 }

-// Fn is for curry function which is func(...any) any
-type Fn func(...any) any
+// Fn is for curry function which is func(...interface{}) interface{}
+type Fn func(...interface{}) interface{}

 // Curry make a curry function
-func (f Fn) Curry(i any) func(...any) any {
-	return func(values ...any) any {
-		v := append([]any{i}, values...)
+func (f Fn) Curry(i interface{}) func(...interface{}) interface{} {
+	return func(values ...interface{}) interface{} {
+		v := append([]interface{}{i}, values...)
 		return f(v...)
 	}
 }

 // Compose compose the functions from right to left
-func Compose(fnList ...func(...any) any) func(...any) any {
-	return func(s ...any) any {
+func Compose(fnList ...func(...interface{}) interface{}) func(...interface{}) interface{} {
+	return func(s ...interface{}) interface{} {
 		f := fnList[0]
 		restFn := fnList[1:]

@@ -66,7 +66,7 @@ func Compose(fnList ...func(...any) any) func(...any) any {
 }

 // Delay make the function execution after delayed time
-func Delay(delay time.Duration, fn any, args ...any) {
+func Delay(delay time.Duration, fn interface{}, args ...interface{}) {
 	// Catch programming error while constructing the closure
 	mustBeFunction(fn)

@@ -95,7 +95,7 @@ func Debounced(fn func(), duration time.Duration) func() {
 }

 // Schedule invoke function every duration time, util close the returned bool chan
-func Schedule(d time.Duration, fn any, args ...any) chan bool {
+func Schedule(d time.Duration, fn interface{}, args ...interface{}) chan bool {
 	// Catch programming error while constructing the closure
 	mustBeFunction(fn)

--- a/function/function_internal.go
+++ b/function/function_internal.go
@@ -5,7 +5,7 @@ import (
 	"reflect"
 )

-func invokeFunc(fn any, args ...any) []reflect.Value {
+func invokeFunc(fn interface{}, args ...interface{}) []reflect.Value {
 	fv := functionValue(fn)
 	params := make([]reflect.Value, len(args))
 	for i, item := range args {
@@ -14,7 +14,7 @@ func invokeFunc(fn any, args ...any) []reflect.Value {
 	return fv.Call(params)
 }

-func unsafeInvokeFunc(fn any, args ...any) []reflect.Value {
+func unsafeInvokeFunc(fn interface{}, args ...interface{}) []reflect.Value {
 	fv := reflect.ValueOf(fn)
 	params := make([]reflect.Value, len(args))
 	for i, item := range args {
@@ -23,7 +23,7 @@ func unsafeInvokeFunc(fn any, args ...any) []reflect.Value {
 	return fv.Call(params)
 }

-func functionValue(function any) reflect.Value {
+func functionValue(function interface{}) reflect.Value {
 	v := reflect.ValueOf(function)
 	if v.Kind() != reflect.Func {
 		panic(fmt.Sprintf("Invalid function type, value of type %T", function))
@@ -31,7 +31,7 @@ func functionValue(function any) reflect.Value {
 	return v
 }

-func mustBeFunction(function any) {
+func mustBeFunction(function interface{}) {
 	v := reflect.ValueOf(function)
 	if v.Kind() != reflect.Func {
 		panic(fmt.Sprintf("Invalid function type, value of type %T", function))
--- a/function/function_test.go
+++ b/function/function_test.go
@@ -7,7 +7,7 @@ import (
 	"testing"
 	"time"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestAfter(t *testing.T) {
@@ -16,7 +16,7 @@ func TestAfter(t *testing.T) {
 		fmt.Println("print done")
 		return i
 	})
-	type cb func(args ...any) []reflect.Value
+	type cb func(args ...interface{}) []reflect.Value
 	print := func(i int, s string, fn cb) {
 		fmt.Printf("print: arr[%d] is %s \n", i, s)
 		v := fn(i)
@@ -42,7 +42,7 @@ func TestBefore(t *testing.T) {
 	})

 	var res []int64
-	type cb func(args ...any) []reflect.Value
+	type cb func(args ...interface{}) []reflect.Value
 	appendStr := func(i int, s string, fn cb) {
 		v := fn(i)
 		res = append(res, v[0].Int())
@@ -62,7 +62,7 @@ func TestCurry(t *testing.T) {
 	add := func(a, b int) int {
 		return a + b
 	}
-	var addCurry Fn = func(values ...any) any {
+	var addCurry Fn = func(values ...interface{}) interface{} {
 		return add(values[0].(int), values[1].(int))
 	}
 	add1 := addCurry.Curry(1)
@@ -72,10 +72,10 @@ func TestCurry(t *testing.T) {
 func TestCompose(t *testing.T) {
 	assert := internal.NewAssert(t, "TestCompose")

-	toUpper := func(a ...any) any {
+	toUpper := func(a ...interface{}) interface{} {
 		return strings.ToUpper(a[0].(string))
 	}
-	toLower := func(a ...any) any {
+	toLower := func(a ...interface{}) interface{} {
 		return strings.ToLower(a[0].(string))
 	}

--- a/function/watcher_test.go
+++ b/function/watcher_test.go
@@ -3,7 +3,7 @@ package function
 import (
 	"testing"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestWatcher(t *testing.T) {
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
-module github.com/duke-git/lancet/v2
+module github.com/duke-git/lancet

-go 1.18
+go 1.16
--- a/internal/assert.go
+++ b/internal/assert.go
@@ -30,14 +30,14 @@ func NewAssert(t *testing.T, caseName string) *Assert {
 }

 // Equal check if expected is equal with actual
-func (a *Assert) Equal(expected, actual any) {
+func (a *Assert) Equal(expected, actual interface{}) {
 	if compare(expected, actual) != compareEqual {
 		makeTestFailed(a.T, a.CaseName, expected, actual)
 	}
 }

 // NotEqual check if expected is not equal with actual
-func (a *Assert) NotEqual(expected, actual any) {
+func (a *Assert) NotEqual(expected, actual interface{}) {
 	if compare(expected, actual) == compareEqual {
 		expectedInfo := fmt.Sprintf("not %v", expected)
 		makeTestFailed(a.T, a.CaseName, expectedInfo, actual)
@@ -45,7 +45,7 @@ func (a *Assert) NotEqual(expected, actual any) {
 }

 // Greater check if expected is greate than actual
-func (a *Assert) Greater(expected, actual any) {
+func (a *Assert) Greater(expected, actual interface{}) {
 	if compare(expected, actual) != compareGreater {
 		expectedInfo := fmt.Sprintf("> %v", expected)
 		makeTestFailed(a.T, a.CaseName, expectedInfo, actual)
@@ -53,7 +53,7 @@ func (a *Assert) Greater(expected, actual any) {
 }

 // GreaterOrEqual check if expected is greate than or equal with actual
-func (a *Assert) GreaterOrEqual(expected, actual any) {
+func (a *Assert) GreaterOrEqual(expected, actual interface{}) {
 	isGreatOrEqual := compare(expected, actual) == compareGreater || compare(expected, actual) == compareEqual
 	if !isGreatOrEqual {
 		expectedInfo := fmt.Sprintf(">= %v", expected)
@@ -62,7 +62,7 @@ func (a *Assert) GreaterOrEqual(expected, actual any) {
 }

 // Less check if expected is less than actual
-func (a *Assert) Less(expected, actual any) {
+func (a *Assert) Less(expected, actual interface{}) {
 	if compare(expected, actual) != compareLess {
 		expectedInfo := fmt.Sprintf("< %v", expected)
 		makeTestFailed(a.T, a.CaseName, expectedInfo, actual)
@@ -70,7 +70,7 @@ func (a *Assert) Less(expected, actual any) {
 }

 // LessOrEqual check if expected is less than or equal with actual
-func (a *Assert) LessOrEqual(expected, actual any) {
+func (a *Assert) LessOrEqual(expected, actual interface{}) {
 	isLessOrEqual := compare(expected, actual) == compareLess || compare(expected, actual) == compareEqual
 	if !isLessOrEqual {
 		expectedInfo := fmt.Sprintf("<= %v", expected)
@@ -79,14 +79,14 @@ func (a *Assert) LessOrEqual(expected, actual any) {
 }

 // IsNil check if value is nil
-func (a *Assert) IsNil(value any) {
+func (a *Assert) IsNil(value interface{}) {
 	if value != nil {
 		makeTestFailed(a.T, a.CaseName, nil, value)
 	}
 }

 // IsNotNil check if value is not nil
-func (a *Assert) IsNotNil(value any) {
+func (a *Assert) IsNotNil(value interface{}) {
 	if value == nil {
 		makeTestFailed(a.T, a.CaseName, "not nil", value)
 	}
@@ -94,7 +94,7 @@ func (a *Assert) IsNotNil(value any) {

 // compare x and y return :
 // x > y -> 1, x < y -> -1, x == y -> 0, x != y -> -2
-func compare(x, y any) int {
+func compare(x, y interface{}) int {
 	vx := reflect.ValueOf(x)
 	vy := reflect.ValueOf(y)

@@ -163,7 +163,7 @@ func compare(x, y any) int {
 }

 // logFailedInfo make test failed and log error info
-func makeTestFailed(t *testing.T, caseName string, expected, actual any) {
+func makeTestFailed(t *testing.T, caseName string, expected, actual interface{}) {
 	_, file, line, _ := runtime.Caller(2)
 	errInfo := fmt.Sprintf("Case %v failed. file: %v, line: %v, expected: %v, actual: %v.", caseName, file, line, expected, actual)
 	t.Error(errInfo)
--- a/lancetconstraints/constraints.go
+++ b/lancetconstraints/constraints.go
@@ -1,13 +0,0 @@
-// Copyright 2021 dudaodong@gmail.com. All rights reserved.
-// Use of this source code is governed by MIT license
-
-// Package lancetconstraints contain some comstomer constraints.
-package lancetconstraints
-
-// Comparator is for comparing two values
-type Comparator interface {
-	// Compare v1 and v2
-	// Ascending order: should return 1 -> v1 > v2, 0 -> v1 = v2, -1 -> v1 < v2
-	// Descending order: should return 1 -> v1 < v2, 0 -> v1 = v2, -1 -> v1 > v2
-	Compare(v1, v2 any) int
-}
--- a/mathutil/mathutil_test.go
+++ b/mathutil/mathutil_test.go
@@ -3,7 +3,7 @@ package mathutil
 import (
 	"testing"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestExponent(t *testing.T) {
--- a/netutil/http.go
+++ b/netutil/http.go
@@ -6,7 +6,8 @@
 // HttpGet, HttpPost, HttpDelete, HttpPut, HttpPatch, function param `url` is required.
 // HttpGet, HttpPost, HttpDelete, HttpPut, HttpPatch, function param `params` is variable, the order is:
 // params[0] is header which type should be http.Header or map[string]string,
-// params[1] is query param which type should be url.Values or map[string]any,
+// params[1] is query string param which type should be url.Values or map[string]string, when content-type header is
+// multipart/form-data or application/x-www-form-urlencoded
 // params[2] is post body which type should be []byte.
 // params[3] is http client which type should be http.Client.
 package netutil
@@ -21,32 +22,32 @@ import (
 )

 //HttpGet send get http request
-func HttpGet(url string, params ...any) (*http.Response, error) {
+func HttpGet(url string, params ...interface{}) (*http.Response, error) {
 	return doHttpRequest(http.MethodGet, url, params...)
 }

 //HttpPost send post http request
-func HttpPost(url string, params ...any) (*http.Response, error) {
+func HttpPost(url string, params ...interface{}) (*http.Response, error) {
 	return doHttpRequest(http.MethodPost, url, params...)
 }

 //HttpPut send put http request
-func HttpPut(url string, params ...any) (*http.Response, error) {
+func HttpPut(url string, params ...interface{}) (*http.Response, error) {
 	return doHttpRequest(http.MethodPut, url, params...)
 }

 //HttpDelete send delete http request
-func HttpDelete(url string, params ...any) (*http.Response, error) {
+func HttpDelete(url string, params ...interface{}) (*http.Response, error) {
 	return doHttpRequest(http.MethodDelete, url, params...)
 }

 // HttpPatch send patch http request
-func HttpPatch(url string, params ...any) (*http.Response, error) {
+func HttpPatch(url string, params ...interface{}) (*http.Response, error) {
 	return doHttpRequest(http.MethodPatch, url, params...)
 }

 // ParseHttpResponse decode http response to specified interface
-func ParseHttpResponse(resp *http.Response, obj any) error {
+func ParseHttpResponse(resp *http.Response, obj interface{}) error {
 	if resp == nil {
 		return errors.New("InvalidResp")
 	}
@@ -55,7 +56,7 @@ func ParseHttpResponse(resp *http.Response, obj any) error {
 }

 // ConvertMapToQueryString convert map to sorted url query string
-func ConvertMapToQueryString(param map[string]any) string {
+func ConvertMapToQueryString(param map[string]interface{}) string {
 	if param == nil {
 		return ""
 	}
--- a/netutil/http_test.go
+++ b/netutil/http_test.go
@@ -4,9 +4,10 @@ import (
 	"encoding/json"
 	"io/ioutil"
 	"log"
+	"net/url"
 	"testing"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestHttpGet(t *testing.T) {
@@ -46,6 +47,29 @@ func TestHttpPost(t *testing.T) {
 	t.Log("response: ", resp.StatusCode, string(body))
 }

+func TestHttpPostFormData(t *testing.T) {
+	apiUrl := "https://jsonplaceholder.typicode.com/todos"
+	header := map[string]string{
+		// "Content-Type": "application/x-www-form-urlencoded",
+		"Content-Type": "multipart/form-data",
+	}
+	type Todo struct {
+		UserId int    `json:"userId"`
+		Title  string `json:"title"`
+	}
+	postData := url.Values{}
+	postData.Add("userId", "1")
+	postData.Add("title", "TestAddToDo")
+
+	resp, err := HttpPost(apiUrl, header, postData, nil)
+	if err != nil {
+		log.Fatal(err)
+		t.FailNow()
+	}
+	body, _ := ioutil.ReadAll(resp.Body)
+	t.Log("response: ", resp.StatusCode, string(body))
+}
+
 func TestHttpPut(t *testing.T) {
 	url := "https://jsonplaceholder.typicode.com/todos/1"
 	header := map[string]string{
@@ -104,7 +128,7 @@ func TestHttpDelete(t *testing.T) {
 func TestConvertMapToQueryString(t *testing.T) {
 	assert := internal.NewAssert(t, "TestConvertMapToQueryString")

-	var m = map[string]any{
+	var m = map[string]interface{}{
 		"c": 3,
 		"a": 1,
 		"b": 2,
--- a/netutil/net.go
+++ b/netutil/net.go
@@ -5,6 +5,8 @@ import (
 	"io/ioutil"
 	"net"
 	"net/http"
+	"net/url"
+	"strings"
 )

 // GetInternalIp return internal ipv4
@@ -47,6 +49,26 @@ func GetPublicIpInfo() (*PublicIpInfo, error) {
 	return &ip, nil
 }

+// GetRequestPublicIp return the requested public ip
+func GetRequestPublicIp(req *http.Request) string {
+	var ip string
+	for _, ip = range strings.Split(req.Header.Get("X-Forwarded-For"), ",") {
+		if ip = strings.TrimSpace(ip); ip != "" && !IsInternalIP(net.ParseIP(ip)) {
+			return ip
+		}
+	}
+
+	if ip = strings.TrimSpace(req.Header.Get("X-Real-Ip")); ip != "" && !IsInternalIP(net.ParseIP(ip)) {
+		return ip
+	}
+
+	if ip, _, _ = net.SplitHostPort(req.RemoteAddr); !IsInternalIP(net.ParseIP(ip)) {
+		return ip
+	}
+
+	return ip
+}
+
 // GetIps return all ipv4 of system
 func GetIps() []string {
 	var ips []string
@@ -122,3 +144,29 @@ func IsPublicIP(IP net.IP) bool {
 	}
 	return false
 }
+
+// IsInternalIP verify an ip is intranet or not
+func IsInternalIP(IP net.IP) bool {
+	if IP.IsLoopback() {
+		return true
+	}
+	if ip4 := IP.To4(); ip4 != nil {
+		return ip4[0] == 10 ||
+			(ip4[0] == 172 && ip4[1] >= 16 && ip4[1] <= 31) ||
+			(ip4[0] == 169 && ip4[1] == 254) ||
+			(ip4[0] == 192 && ip4[1] == 168)
+	}
+	return false
+}
+
+// EncodeUrl encode url
+func EncodeUrl(urlStr string) (string, error) {
+	URL, err := url.Parse(urlStr)
+	if err != nil {
+		return "", err
+	}
+
+	URL.RawQuery = URL.Query().Encode()
+
+	return URL.String(), nil
+}
--- a/netutil/net_internal.go
+++ b/netutil/net_internal.go
@@ -10,7 +10,7 @@ import (
 	"strings"
 )

-func doHttpRequest(method, reqUrl string, params ...any) (*http.Response, error) {
+func doHttpRequest(method, reqUrl string, params ...interface{}) (*http.Response, error) {
 	if len(reqUrl) == 0 {
 		return nil, errors.New("url should be specified")
 	}
@@ -41,6 +41,7 @@ func doHttpRequest(method, reqUrl string, params ...any) (*http.Response, error)
 			return nil, err
 		}
 	case 3:
+
 		err := setHeaderAndQueryAndBody(req, reqUrl, params[0], params[1], params[2])
 		if err != nil {
 			return nil, err
@@ -60,7 +61,7 @@ func doHttpRequest(method, reqUrl string, params ...any) (*http.Response, error)
 	return resp, e
 }

-func setHeaderAndQueryParam(req *http.Request, reqUrl string, header, queryParam any) error {
+func setHeaderAndQueryParam(req *http.Request, reqUrl string, header, queryParam interface{}) error {
 	err := setHeader(req, header)
 	if err != nil {
 		return err
@@ -72,7 +73,7 @@ func setHeaderAndQueryParam(req *http.Request, reqUrl string, header, queryParam
 	return nil
 }

-func setHeaderAndQueryAndBody(req *http.Request, reqUrl string, header, queryParam, body any) error {
+func setHeaderAndQueryAndBody(req *http.Request, reqUrl string, header, queryParam, body interface{}) error {
 	err := setHeader(req, header)
 	if err != nil {
 		return err
@@ -81,14 +82,28 @@ func setHeaderAndQueryAndBody(req *http.Request, reqUrl string, header, queryPar
 	if err != nil {
 		return err
 	}
-	err = setBodyByte(req, body)
+	if strings.Contains(req.Header.Get("Content-Type"), "multipart/form-data") || req.Header.Get("Content-Type") == "application/x-www-form-urlencoded" {
+		if formData, ok := queryParam.(url.Values); ok {
+			err = setBodyByte(req, []byte(formData.Encode()))
+		}
+		if formData, ok := queryParam.(map[string]string); ok {
+			postData := url.Values{}
+			for k, v := range formData {
+				postData.Set(k, v)
+			}
+			err = setBodyByte(req, []byte(postData.Encode()))
+		}
+
+	} else {
+		err = setBodyByte(req, body)
+	}
 	if err != nil {
 		return err
 	}
 	return nil
 }

-func setHeader(req *http.Request, header any) error {
+func setHeader(req *http.Request, header interface{}) error {
 	if header != nil {
 		switch v := header.(type) {
 		case map[string]string:
@@ -122,11 +137,11 @@ func setUrl(req *http.Request, reqUrl string) error {
 	return nil
 }

-func setQueryParam(req *http.Request, reqUrl string, queryParam any) error {
+func setQueryParam(req *http.Request, reqUrl string, queryParam interface{}) error {
 	var values url.Values
 	if queryParam != nil {
 		switch v := queryParam.(type) {
-		case map[string]any:
+		case map[string]interface{}:
 			values = url.Values{}
 			for k := range v {
 				values.Set(k, fmt.Sprintf("%v", v[k]))
@@ -134,7 +149,7 @@ func setQueryParam(req *http.Request, reqUrl string, queryParam any) error {
 		case url.Values:
 			values = v
 		default:
-			return errors.New("query params type should be url.Values or map[string]any")
+			return errors.New("query params type should be url.Values or map[string]interface{}")
 		}
 	}

@@ -155,7 +170,7 @@ func setQueryParam(req *http.Request, reqUrl string, queryParam any) error {
 	return nil
 }

-func setBodyByte(req *http.Request, body any) error {
+func setBodyByte(req *http.Request, body interface{}) error {
 	if body != nil {
 		switch b := body.(type) {
 		case []byte:
@@ -168,7 +183,7 @@ func setBodyByte(req *http.Request, body any) error {
 	return nil
 }

-func getClient(client any) (*http.Client, error) {
+func getClient(client interface{}) (*http.Client, error) {
 	c := http.Client{}
 	if client != nil {
 		switch v := client.(type) {
--- a/netutil/net_test.go
+++ b/netutil/net_test.go
@@ -4,7 +4,7 @@ import (
 	"net"
 	"testing"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestGetInternalIp(t *testing.T) {
--- a/random/random_test.go
+++ b/random/random_test.go
@@ -5,7 +5,7 @@ import (
 	"regexp"
 	"testing"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestRandString(t *testing.T) {
--- a/retry/retry_test.go
+++ b/retry/retry_test.go
@@ -6,7 +6,7 @@ import (
 	"testing"
 	"time"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestRetryFailed(t *testing.T) {
--- a/slice/slice.go
+++ b/slice/slice.go
--- a/slice/slice_internal.go
+++ b/slice/slice_internal.go
@@ -6,7 +6,7 @@ import (
 )

 // sliceValue return the reflect value of a slice
-func sliceValue(slice any) reflect.Value {
+func sliceValue(slice interface{}) reflect.Value {
 	v := reflect.ValueOf(slice)
 	if v.Kind() != reflect.Slice {
 		panic(fmt.Sprintf("Invalid slice type, value of type %T", slice))
@@ -15,7 +15,7 @@ func sliceValue(slice any) reflect.Value {
 }

 // functionValue return the reflect value of a function
-func functionValue(function any) reflect.Value {
+func functionValue(function interface{}) reflect.Value {
 	v := reflect.ValueOf(function)
 	if v.Kind() != reflect.Func {
 		panic(fmt.Sprintf("Invalid function type, value of type %T", function))
--- a/slice/slice_test.go
+++ b/slice/slice_test.go
@@ -1,9 +1,10 @@
 package slice

 import (
+	"reflect"
 	"testing"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestContain(t *testing.T) {
@@ -14,36 +15,41 @@ func TestContain(t *testing.T) {
 	assert.Equal(true, Contain([]string{""}, ""))
 	assert.Equal(false, Contain([]string{}, ""))

-	assert.Equal(true, Contain([]int{1, 2, 3}, 1))
+	var m = map[string]int{"a": 1}
+	assert.Equal(true, Contain(m, "a"))
+	assert.Equal(false, Contain(m, "b"))
+
+	assert.Equal(true, Contain("abc", "a"))
+	assert.Equal(false, Contain("abc", "d"))
 }

 func TestContainSubSlice(t *testing.T) {
 	assert := internal.NewAssert(t, "TestContainSubSlice")
 	assert.Equal(true, ContainSubSlice([]string{"a", "a", "b", "c"}, []string{"a", "a"}))
 	assert.Equal(false, ContainSubSlice([]string{"a", "a", "b", "c"}, []string{"a", "d"}))
-	assert.Equal(true, ContainSubSlice([]int{1, 2, 3}, []int{1, 2}))
-	assert.Equal(false, ContainSubSlice([]int{1, 2, 3}, []int{0, 1}))
+
+	assert.Equal(true, ContainSubSlice([]int{1, 2, 3}, []int{1}))
+	assert.Equal(false, ContainSubSlice([]int{1, 2, 3}, []string{"a"}))
 }

 func TestChunk(t *testing.T) {
 	assert := internal.NewAssert(t, "TestChunk")

 	arr := []string{"a", "b", "c", "d", "e"}
+	r1 := [][]interface{}{{"a"}, {"b"}, {"c"}, {"d"}, {"e"}}
+	assert.Equal(r1, Chunk(InterfaceSlice(arr), 1))

-	r1 := [][]string{{"a"}, {"b"}, {"c"}, {"d"}, {"e"}}
-	assert.Equal(r1, Chunk(arr, 1))
+	r2 := [][]interface{}{{"a", "b"}, {"c", "d"}, {"e"}}
+	assert.Equal(r2, Chunk(InterfaceSlice(arr), 2))

-	r2 := [][]string{{"a", "b"}, {"c", "d"}, {"e"}}
-	assert.Equal(r2, Chunk(arr, 2))
+	r3 := [][]interface{}{{"a", "b", "c"}, {"d", "e"}}
+	assert.Equal(r3, Chunk(InterfaceSlice(arr), 3))

-	r3 := [][]string{{"a", "b", "c"}, {"d", "e"}}
-	assert.Equal(r3, Chunk(arr, 3))
+	r4 := [][]interface{}{{"a", "b", "c", "d"}, {"e"}}
+	assert.Equal(r4, Chunk(InterfaceSlice(arr), 4))

-	r4 := [][]string{{"a", "b", "c", "d"}, {"e"}}
-	assert.Equal(r4, Chunk(arr, 4))
-
-	r5 := [][]string{{"a"}, {"b"}, {"c"}, {"d"}, {"e"}}
-	assert.Equal(r5, Chunk(arr, 5))
+	r5 := [][]interface{}{{"a"}, {"b"}, {"c"}, {"d"}, {"e"}}
+	assert.Equal(r5, Chunk(InterfaceSlice(arr), 5))
 }

 func TestCompact(t *testing.T) {
@@ -60,11 +66,35 @@ func TestCompact(t *testing.T) {
 func TestConcat(t *testing.T) {
 	assert := internal.NewAssert(t, "Concat")

-	// assert.Equal([]int{0}, Concat([]int{}, 0))
-	// assert.Equal([]int{1, 2, 3, 4, 5}, Concat([]int{1, 2, 3}, 4, 5))
+	assert.Equal([]int{0}, Concat([]int{}, 0))
+	assert.Equal([]int{1, 2, 3, 4, 5}, Concat([]int{1, 2, 3}, 4, 5))
 	assert.Equal([]int{1, 2, 3, 4, 5}, Concat([]int{1, 2, 3}, []int{4, 5}))
 	assert.Equal([]int{1, 2, 3, 4, 5}, Concat([]int{1, 2, 3}, []int{4}, []int{5}))
-	// assert.Equal([]int{1, 2, 3, 4, 5}, Concat([]int{1, 2, 3}, []int{4}, 5))
+	assert.Equal([]int{1, 2, 3, 4, 5}, Concat([]int{1, 2, 3}, []int{4}, 5))
+}
+
+func TestEqual(t *testing.T) {
+	assert := internal.NewAssert(t, "TestEqual")
+
+	slice1 := []int{1, 2, 3}
+	slice2 := []int{1, 2, 3}
+	slice3 := []int{3, 2, 1}
+
+	assert.Equal(true, Equal(slice1, slice2))
+	assert.Equal(false, Equal(slice1, slice3))
+}
+
+func TestEqualWith(t *testing.T) {
+	assert := internal.NewAssert(t, "TestEqualWith")
+
+	slice1 := []int{1, 2, 3}
+	slice2 := []int{2, 4, 6}
+
+	isDouble := func(a, b int) bool {
+		return b == a*2
+	}
+
+	assert.Equal(true, EqualWith(slice1, slice2, isDouble))
 }

 func TestEvery(t *testing.T) {
@@ -163,7 +193,7 @@ func TestFind(t *testing.T) {
 	}

 	assert := internal.NewAssert(t, "TestFind")
-	assert.Equal(2, *res)
+	assert.Equal(2, res)
 }

 func TestFindLast(t *testing.T) {
@@ -177,7 +207,7 @@ func TestFindLast(t *testing.T) {
 	}

 	assert := internal.NewAssert(t, "TestFindLast")
-	assert.Equal(4, *res)
+	assert.Equal(4, res)
 }

 func TestFindFoundNothing(t *testing.T) {
@@ -206,11 +236,9 @@ func TestForEach(t *testing.T) {
 	expected := []int{3, 4, 5, 6, 7}

 	var numbersAddTwo []int
-	addTwo := func(index int, value int) {
+	ForEach(numbers, func(index int, value int) {
 		numbersAddTwo = append(numbersAddTwo, value+2)
-	}
-
-	ForEach(numbers, addTwo)
+	})

 	assert := internal.NewAssert(t, "TestForEach")
 	assert.Equal(expected, numbersAddTwo)
@@ -268,7 +296,7 @@ func TestReduce(t *testing.T) {
 }

 func TestIntSlice(t *testing.T) {
-	var nums []any
+	var nums []interface{}
 	nums = append(nums, 1, 2, 3)

 	assert := internal.NewAssert(t, "TestIntSlice")
@@ -276,7 +304,7 @@ func TestIntSlice(t *testing.T) {
 }

 func TestStringSlice(t *testing.T) {
-	var strs []any
+	var strs []interface{}
 	strs = append(strs, "a", "b", "c")

 	assert := internal.NewAssert(t, "TestStringSlice")
@@ -285,27 +313,41 @@ func TestStringSlice(t *testing.T) {

 func TestInterfaceSlice(t *testing.T) {
 	strs := []string{"a", "b", "c"}
-	expect := []any{"a", "b", "c"}
+	expect := []interface{}{"a", "b", "c"}

 	assert := internal.NewAssert(t, "TestInterfaceSlice")
 	assert.Equal(expect, InterfaceSlice(strs))
 }

-func TestDeleteAt(t *testing.T) {
-	assert := internal.NewAssert(t, "TestDeleteAt")
+func TestDeleteByIndex(t *testing.T) {
+	assert := internal.NewAssert(t, "TestDeleteByIndex")

-	assert.Equal([]string{"a", "b", "c"}, DeleteAt([]string{"a", "b", "c"}, -1))
-	assert.Equal([]string{"a", "b", "c"}, DeleteAt([]string{"a", "b", "c"}, 3))
-	assert.Equal([]string{"b", "c"}, DeleteAt([]string{"a", "b", "c"}, 0))
-	assert.Equal([]string{"a", "c"}, DeleteAt([]string{"a", "b", "c"}, 1))
-	assert.Equal([]string{"a", "b"}, DeleteAt([]string{"a", "b", "c"}, 2))
+	t1 := []string{"a", "b", "c", "d", "e"}
+	r1 := []string{"b", "c", "d", "e"}
+	a1, _ := DeleteByIndex(t1, 0)
+	assert.Equal(r1, a1)

-	assert.Equal([]string{"b", "c"}, DeleteAt([]string{"a", "b", "c"}, 0, 1))
-	assert.Equal([]string{"c"}, DeleteAt([]string{"a", "b", "c"}, 0, 2))
-	assert.Equal([]string{}, DeleteAt([]string{"a", "b", "c"}, 0, 3))
-	assert.Equal([]string{}, DeleteAt([]string{"a", "b", "c"}, 0, 4))
-	assert.Equal([]string{"a"}, DeleteAt([]string{"a", "b", "c"}, 1, 3))
-	assert.Equal([]string{"a"}, DeleteAt([]string{"a", "b", "c"}, 1, 4))
+	t2 := []string{"a", "b", "c", "d", "e"}
+	r2 := []string{"a", "b", "c", "e"}
+	a2, _ := DeleteByIndex(t2, 3)
+	assert.Equal(r2, a2)
+
+	t3 := []string{"a", "b", "c", "d", "e"}
+	r3 := []string{"c", "d", "e"}
+	a3, _ := DeleteByIndex(t3, 0, 2)
+	assert.Equal(r3, a3)
+
+	t4 := []string{"a", "b", "c", "d", "e"}
+	r4 := []string{}
+	a4, _ := DeleteByIndex(t4, 0, 5)
+	assert.Equal(r4, a4)
+
+	t5 := []string{"a", "b", "c", "d", "e"}
+	_, err := DeleteByIndex(t5, 1, 1)
+	assert.IsNotNil(err)
+
+	_, err = DeleteByIndex(t5, 0, 6)
+	assert.IsNotNil(err)
 }

 func TestDrop(t *testing.T) {
@@ -325,28 +367,48 @@ func TestDrop(t *testing.T) {
 	assert.Equal([]int{}, Drop([]int{1, 2, 3, 4, 5}, -6))
 }

-func TestInsertAt(t *testing.T) {
-	assert := internal.NewAssert(t, "TestInsertAt")
+func TestInsertByIndex(t *testing.T) {
+	assert := internal.NewAssert(t, "TestInsertByIndex")

-	strs := []string{"a", "b", "c"}
-	assert.Equal([]string{"a", "b", "c"}, InsertAt(strs, -1, "1"))
-	assert.Equal([]string{"a", "b", "c"}, InsertAt(strs, 4, "1"))
-	assert.Equal([]string{"1", "a", "b", "c"}, InsertAt(strs, 0, "1"))
-	assert.Equal([]string{"a", "1", "b", "c"}, InsertAt(strs, 1, "1"))
-	assert.Equal([]string{"a", "b", "1", "c"}, InsertAt(strs, 2, "1"))
-	assert.Equal([]string{"a", "b", "c", "1"}, InsertAt(strs, 3, "1"))
-	assert.Equal([]string{"1", "2", "3", "a", "b", "c"}, InsertAt(strs, 0, []string{"1", "2", "3"}))
-	assert.Equal([]string{"a", "b", "c", "1", "2", "3"}, InsertAt(strs, 3, []string{"1", "2", "3"}))
-	t.Log(strs)
+	t1 := []string{"a", "b", "c"}
+	r1, _ := InsertByIndex(t1, 0, "1")
+	assert.Equal([]string{"1", "a", "b", "c"}, r1)
+
+	r2, _ := InsertByIndex(t1, 1, "1")
+	assert.Equal([]string{"a", "1", "b", "c"}, r2)
+
+	r3, _ := InsertByIndex(t1, 3, "1")
+	assert.Equal([]string{"a", "b", "c", "1"}, r3)
+
+	r4, _ := InsertByIndex(t1, 0, []string{"1", "2", "3"})
+	assert.Equal([]string{"1", "2", "3", "a", "b", "c"}, r4)
+
+	r5, _ := InsertByIndex(t1, 3, []string{"1", "2", "3"})
+	assert.Equal([]string{"a", "b", "c", "1", "2", "3"}, r5)
+
+	_, err := InsertByIndex(t1, 4, "1")
+	assert.IsNotNil(err)
+
+	_, err = InsertByIndex(t1, 0, 1)
+	assert.IsNotNil(err)
 }

-func TestUpdateAt(t *testing.T) {
-	assert := internal.NewAssert(t, "TestUpdateAt")
+func TestUpdateByIndex(t *testing.T) {
+	assert := internal.NewAssert(t, "TestUpdateByIndex")

-	assert.Equal([]string{"a", "b", "c"}, UpdateAt([]string{"a", "b", "c"}, -1, "1"))
-	assert.Equal([]string{"1", "b", "c"}, UpdateAt([]string{"a", "b", "c"}, 0, "1"))
-	assert.Equal([]string{"a", "b", "2"}, UpdateAt([]string{"a", "b", "c"}, 2, "2"))
-	assert.Equal([]string{"a", "b", "c"}, UpdateAt([]string{"a", "b", "c"}, 3, "2"))
+	t1 := []string{"a", "b", "c"}
+	r1, _ := UpdateByIndex(t1, 0, "1")
+	assert.Equal([]string{"1", "b", "c"}, r1)
+
+	t2 := []string{"a", "b", "c"}
+	r2, _ := UpdateByIndex(t2, 1, "1")
+	assert.Equal([]string{"a", "1", "c"}, r2)
+
+	_, err := UpdateByIndex([]string{"a", "b", "c"}, 4, "1")
+	assert.IsNotNil(err)
+
+	_, err = UpdateByIndex([]string{"a", "b", "c"}, 0, 1)
+	assert.IsNotNil(err)
 }

 func TestUnique(t *testing.T) {
@@ -356,6 +418,15 @@ func TestUnique(t *testing.T) {
 	assert.Equal([]string{"a", "b", "c"}, Unique([]string{"a", "a", "b", "c"}))
 }

+func TestUniqueBy(t *testing.T) {
+	assert := internal.NewAssert(t, "TestUniqueBy")
+
+	actual := UniqueBy([]int{1, 2, 3, 4, 5, 6}, func(val int) int {
+		return val % 4
+	})
+	assert.Equal([]int{1, 2, 3, 0}, actual)
+}
+
 func TestUnion(t *testing.T) {
 	assert := internal.NewAssert(t, "TestUnion")

@@ -380,7 +451,7 @@ func TestIntersection(t *testing.T) {
 		{1, 2, 3},
 		{},
 	}
-	res := []any{
+	res := []interface{}{
 		Intersection(s1, s2, s3),
 		Intersection(s1, s2),
 		Intersection(s1),
@@ -390,20 +461,20 @@ func TestIntersection(t *testing.T) {
 	assert := internal.NewAssert(t, "TestIntersection")

 	for i := 0; i < len(res); i++ {
-		assert.Equal(expected[i], res[i])
+		assert.Equal(res[i], expected[i])
 	}
-	// assert.IsNil(Intersection())
+	assert.IsNil(Intersection())
 }

-func TestReverse(t *testing.T) {
-	assert := internal.NewAssert(t, "TestReverse")
+func TestReverseSlice(t *testing.T) {
+	assert := internal.NewAssert(t, "TestIntersection")

 	s1 := []int{1, 2, 3, 4, 5}
-	Reverse(s1)
+	ReverseSlice(s1)
 	assert.Equal([]int{5, 4, 3, 2, 1}, s1)

 	s2 := []string{"a", "b", "c", "d", "e"}
-	Reverse(s2)
+	ReverseSlice(s2)
 	assert.Equal([]string{"e", "d", "c", "b", "a"}, s2)
 }

@@ -415,17 +486,6 @@ func TestDifference(t *testing.T) {
 	assert.Equal([]int{1, 2, 3}, Difference(s1, s2))
 }

-func TestDifferenceWith(t *testing.T) {
-	assert := internal.NewAssert(t, "TestDifferenceWith")
-
-	s1 := []int{1, 2, 3, 4, 5}
-	s2 := []int{4, 5, 6, 7, 8}
-	isDouble := func(v1, v2 int) bool {
-		return v2 == 2*v1
-	}
-	assert.Equal([]int{1, 5}, DifferenceWith(s1, s2, isDouble))
-}
-
 func TestDifferenceBy(t *testing.T) {
 	assert := internal.NewAssert(t, "TestDifferenceBy")

@@ -502,5 +562,65 @@ func TestShuffle(t *testing.T) {
 	res := Shuffle(s)
 	t.Log("Shuffle result: ", res)

-	assert.Equal(5, len(res))
+	assert.Equal(reflect.TypeOf(s), reflect.TypeOf(res))
+
+	rv := reflect.ValueOf(res)
+	assert.Equal(5, rv.Len())
+
+	assert.Equal(true, rv.Kind() == reflect.Slice)
+	assert.Equal(true, rv.Type().Elem().Kind() == reflect.Int)
+
+	assert.Equal(true, Contain(res, 1))
+	assert.Equal(true, Contain(res, 2))
+	assert.Equal(true, Contain(res, 3))
+	assert.Equal(true, Contain(res, 4))
+	assert.Equal(true, Contain(res, 5))
+}
+
+func TestIndexOf(t *testing.T) {
+	assert := internal.NewAssert(t, "TestIndexOf")
+
+	arr := []string{"a", "a", "b", "c"}
+	assert.Equal(0, IndexOf(arr, "a"))
+	assert.Equal(-1, IndexOf(arr, "d"))
+}
+
+func TestLastIndexOf(t *testing.T) {
+	assert := internal.NewAssert(t, "TestLastIndexOf")
+
+	arr := []string{"a", "a", "b", "c"}
+	assert.Equal(1, LastIndexOf(arr, "a"))
+	assert.Equal(-1, LastIndexOf(arr, "d"))
+}
+
+func TestToSlice(t *testing.T) {
+	assert := internal.NewAssert(t, "TestToSlice")
+
+	str1 := "a"
+	str2 := "b"
+	out1 := ToSlice(str1)
+	out2 := ToSlice(str1, str2)
+
+	assert.Equal([]string{"a"}, StringSlice(out1))
+	assert.Equal([]string{"a", "b"}, StringSlice(out2))
+}
+
+func TestToSlicePointer(t *testing.T) {
+	assert := internal.NewAssert(t, "TestToSlicePointer")
+
+	var str1 interface{}
+	str1 = "a"
+	var str2 interface{}
+	str2 = "b"
+
+	assert.Equal([]*interface{}{&str1}, ToSlicePointer(str1))
+	assert.Equal([]*interface{}{&str1, &str2}, ToSlicePointer(str1, str2))
+}
+
+func TestAppendIfAbsent(t *testing.T) {
+	assert := internal.NewAssert(t, "TestToAppendIfAbsent")
+
+	str1 := []string{"a", "b"}
+	assert.Equal([]string{"a", "b"}, AppendIfAbsent(str1, "a"))
+	assert.Equal([]string{"a", "b", "c"}, AppendIfAbsent(str1, "c"))
 }
--- a/strutil/string.go
+++ b/strutil/string.go
@@ -1,3 +1,4 @@
+// Copyright 2021 dudaodong@gmail.com. All rights reserved.
 // Use of this source code is governed by MIT license

 // Package strutil implements some functions to manipulate string.
@@ -196,7 +197,7 @@ func AfterLast(s, char string) string {
 }

 // IsString check if the value data type is string or not.
-func IsString(v any) bool {
+func IsString(v interface{}) bool {
 	if v == nil {
 		return false
 	}
@@ -247,3 +248,52 @@ func Unwrap(str string, wrapToken string) string {

 	return str
 }
+
+// SplitEx split a given string whether the result contains empty string
+func SplitEx(s, sep string, removeEmptyString bool) []string {
+	if sep == "" {
+		return []string{}
+	}
+
+	n := strings.Count(s, sep) + 1
+	a := make([]string, n)
+	n--
+	i := 0
+	sepSave := 0
+	ignore := false
+
+	for i < n {
+		m := strings.Index(s, sep)
+		if m < 0 {
+			break
+		}
+		ignore = false
+		if removeEmptyString {
+			if s[:m+sepSave] == "" {
+				ignore = true
+			}
+		}
+		if !ignore {
+			a[i] = s[:m+sepSave]
+			s = s[m+len(sep):]
+			i++
+		} else {
+			s = s[m+len(sep):]
+		}
+	}
+
+	var ret []string
+	if removeEmptyString {
+		if s != "" {
+			a[i] = s
+			ret = a[:i+1]
+		} else {
+			ret = a[:i]
+		}
+	} else {
+		a[i] = s
+		ret = a[:i+1]
+	}
+
+	return ret
+}
--- a/strutil/string_test.go
+++ b/strutil/string_test.go
@@ -3,7 +3,7 @@ package strutil
 import (
 	"testing"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestCamelCase(t *testing.T) {
@@ -177,3 +177,15 @@ func TestUnwrap(t *testing.T) {
 	assert.Equal("***", Unwrap("***", "**"))
 	assert.Equal("**", Unwrap("**", "**"))
 }
+
+func TestSplitEx(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSplitEx")
+
+	assert.Equal([]string{}, SplitEx(" a b c ", "", true))
+
+	assert.Equal([]string{"", "a", "b", "c", ""}, SplitEx(" a b c ", " ", false))
+	assert.Equal([]string{"a", "b", "c"}, SplitEx(" a b c ", " ", true))
+
+	assert.Equal([]string{" a", "b", "c", ""}, SplitEx(" a = b = c = ", " = ", false))
+	assert.Equal([]string{" a", "b", "c"}, SplitEx(" a = b = c = ", " = ", true))
+}
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
dudaodong	b6815224fd	release v1.3.1	2022-08-02 17:52:18 +08:00
dudaodong	5931b882ee	doc: update document for system package	2022-07-29 13:33:23 +08:00
dudaodong	f8096e3585	doc: update slice document	2022-07-29 13:31:04 +08:00
dudaodong	979381bfb7	doc: update convertor document	2022-07-29 13:28:25 +08:00
dudaodong	3e2c25f827	doc: update netutil document	2022-07-29 13:23:30 +08:00
dudaodong	2c7bcc9fbb	doc: update slice document	2022-07-29 13:17:05 +08:00
dudaodong	3a944ab12f	test: update slice unit test	2022-07-27 15:31:12 +08:00
dudaodong	387079d034	feat: os.go, add GetOsBits	2022-07-27 15:27:39 +08:00
dudaodong	33e3631b72	fix: fix aes/des cbc crypto iv bug	2022-07-27 15:26:45 +08:00
dudaodong	b3149ea619	feat: convertor.go, add ToChannel	2022-07-27 15:22:43 +08:00
dudaodong	116ff284c3	feat: net.go, add IsInternalIP, GetRequestPublicIp, EncodeUrl	2022-07-27 15:18:20 +08:00
dudaodong	0cb251f7b8	feat: add ToSlice and ToSlicePointer and AppendIfAbsent	2022-07-27 15:12:14 +08:00
dudaodong	683def2242	docs: update go version badge	2022-06-24 09:41:46 +08:00
dudaodong	d4a90f2869	release v1.3.0	2022-06-22 16:30:45 +08:00
dudaodong	be67de3b40	release v1.3.0	2022-06-22 15:58:41 +08:00
dudaodong	6898ed413e	docs: add doc for UniqueBy function	2022-06-22 15:47:48 +08:00
dudaodong	5dbdbcd651	docs: add doc for UniqueBy function	2022-06-22 15:45:29 +08:00
dudaodong	ae0facd32d	refactor: clean code for slice/slice.go	2022-06-22 14:21:45 +08:00
dudaodong	2d7e19fb87	feat: add UniqueBy function in slice.go	2022-06-22 12:00:01 +08:00
dudaodong	24d4a03227	update .gitignore file	2022-06-22 11:27:31 +08:00
dudaodong	93fb089f6e	docs: add CreateDir function for fileutil	2022-06-17 17:25:16 +08:00
dudaodong	2fe272f2ef	docs: add CreateDir function for fileutil	2022-06-17 17:22:08 +08:00
dudaodong	77859ffa15	docs: add doc for SplitEx function	2022-06-17 17:19:59 +08:00
dudaodong	f83f47df3a	feat: add SplitEx function	2022-06-17 17:13:58 +08:00
dudaodong	885c08847d	docs: add doc for function IndexOf and LastIndexOf	2022-06-17 17:11:09 +08:00
dudaodong	cc4a20751f	test: add unit test for funcation IndexOf and LastIndexOf	2022-06-17 17:02:44 +08:00
dudaodong	b0d1d39452	feat: add IndexOf and LastIndexOf function in slice.go	2022-06-17 17:01:37 +08:00
dudaodong	02fa7bc8be	docs: add doc for function Equal and EqualWithFunc	2022-06-17 16:57:42 +08:00
dudaodong	433eb63b86	feat: add EqualWith function for slice	2022-06-17 15:47:36 +08:00
dudaodong	a2541dac03	feat: add Equal function for slice	2022-06-17 15:37:36 +08:00
dudaodong	690e746811	update readme file	2022-04-29 14:50:29 +08:00
dudaodong	7cb97a26c5	release v1.2.9	2022-04-14 11:41:46 +08:00
dudaodong	39d373d37b	fix: fix http post to support multipart/form-data header	2022-04-14 11:39:21 +08:00
dudaodong	1aefd6aa12	release v1.2.8	2022-04-13 11:46:14 +08:00
dudaodong	c7aa44b8a4	fix: fix http post fucntion	2022-04-13 11:38:45 +08:00
dudaodong	0e3dc68de5	release v1.2.7	2022-03-29 10:52:55 +08:00
dudaodong	4083e75ed4	fix: fix ToBytes bug	2022-03-26 21:09:28 +08:00
dudaodong	1327eff62f	docs: add doc for unix time	2022-03-24 16:09:19 +08:00
dudaodong	eb24c37143	docs: add doc for unix time	2022-03-24 16:07:17 +08:00
dudaodong	b7a6c91064	feat: add unix date conversion	2022-03-24 16:03:57 +08:00
dudaodong	555e185871	feat: add unix date conversion	2022-03-24 16:01:41 +08:00
dudaodong	cb0efc5cc7	docs: replace path '/main' with '/v1'	2022-03-16 16:18:28 +08:00