release v2.1.12

update readme file
2026-02-05 13:22:26 +08:00 · 2022-12-15 16:55:20 +08:00 · 2022-12-15 16:44:30 +08:00 · 2022-12-15 16:42:22 +08:00 · 2022-12-15 16:38:50 +08:00 · 2022-12-15 15:22:01 +08:00
104 changed files with 6626 additions and 2046 deletions
--- a/README.md
+++ b/README.md
@@ -1,15 +1,16 @@
 <div align=center>
-<img src="./logo.png" width="200" height="200"/>
+<a href="https://uvdream.github.io/lancet-docs/en/"><img src="./logo.png" width="200" height="200"/></a>

 <br/>

 ![Go version](https://img.shields.io/badge/go-%3E%3Dv1.18-9cf)
-[![Release](https://img.shields.io/badge/release-2.1.5-green.svg)](https://github.com/duke-git/lancet/releases)
+[![Release](https://img.shields.io/badge/release-2.1.12-green.svg)](https://github.com/duke-git/lancet/releases)
 [![GoDoc](https://godoc.org/github.com/duke-git/lancet/v2?status.svg)](https://pkg.go.dev/github.com/duke-git/lancet/v2)
 [![Go Report Card](https://goreportcard.com/badge/github.com/duke-git/lancet/v2)](https://goreportcard.com/report/github.com/duke-git/lancet/v2)
 [![test](https://github.com/duke-git/lancet/actions/workflows/codecov.yml/badge.svg?branch=main&event=push)](https://github.com/duke-git/lancet/actions/workflows/codecov.yml)
 [![codecov](https://codecov.io/gh/duke-git/lancet/branch/main/graph/badge.svg?token=FC48T1F078)](https://codecov.io/gh/duke-git/lancet)
 [![License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/duke-git/lancet/blob/main/LICENSE)
+
 </div>

 <div STYLE="page-break-after: always;"></div>
@@ -22,22 +23,25 @@ English | [简体中文](./README_zh-CN.md)

 ## Feature

- 👏 Comprehensive, efficient and reusable.
- 💪 300+ go util functions, support string, slice, datetime, net, crypt...
- 💅 Only depend on the go standard library.
- 🌍 Unit test for every exported function.
+-   👏 Comprehensive, efficient and reusable.
+-   💪 300+ go util functions, support string, slice, datetime, net, crypt...
+-   💅 Only depend on the go standard library.
+-   🌍 Unit test for every exported function.

 ## Installation
+
 ### Note:

 1. <b>For users who use go1.18 and above, it is recommended to install lancet v2.x.x. Cause v2.x.x rewrite all functions with generics of go1.18.</b>
+
 ```go
 go get github.com/duke-git/lancet/v2 // will install latest version of v2.x.x
 ```

-2. <b>For users who use version below go1.18, you should install v1.x.x. now latest v1 is v1.3.1. </b>
+2. <b>For users who use version below go1.18, you should install v1.x.x. now latest v1 is v1.3.5. </b>
+
 ```go
-go get github.com/duke-git/lancet@v1.3.1 // below go1.18, install latest version of v1.x.x
+go get github.com/duke-git/lancet@v1.3.5 // below go1.18, install latest version of v1.x.x
 ```

 ## Usage
@@ -69,147 +73,170 @@ func main() {

 ## API Documentation

+## [lancet API doc](https://uvdream.github.io/lancet-docs/) Thanks [@UvDream](https://github.com/UvDream) for contributing.
+
 ### 1. Algorithm package implements some basic algorithm. eg. sort, search.

 ```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)
-

+-   [BubbleSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#BubbleSort)
+-   [CountSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#CountSort)
+-   [HeapSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#HeapSort)
+-   [InsertionSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#InsertionSort)
+-   [MergeSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#MergeSort)
+-   [QuickSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#QuickSort)
+-   [SelectionSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#SelectionSort)
+-   [ShellSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#ShellSort)
+-   [BinarySearch](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#BinarySearch)
+-   [BinaryIterativeSearch](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#BinaryIterativeSearch)
+-   [LinearSearch](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#LinearSearch)
+-   [LRUCache](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#LRUCache)

 ### 2. Concurrency package contain some functions to support concurrent programming. eg, goroutine, channel, async.

 ```go
 import "github.com/duke-git/lancet/v2/concurrency"
 ```
-#### Function list:
- [NewChannel](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#NewChannel)
- [Bridge](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#Bridge)
- [FanIn](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#FanIn)
- [Generate](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#Generate)
- [Or](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#Or)
- [OrDone](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#OrDone)
- [Repeat](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#Repeat)
- [RepeatFn](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#RepeatFn)
- [Take](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#Take)
- [Tee](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#Tee)

-### 3. Convertor package contains some functions for data convertion.
+#### Function list:
+
+-   [NewChannel](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#NewChannel)
+-   [Bridge](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#Bridge)
+-   [FanIn](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#FanIn)
+-   [Generate](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#Generate)
+-   [Or](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#Or)
+-   [OrDone](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#OrDone)
+-   [Repeat](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#Repeat)
+-   [RepeatFn](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#RepeatFn)
+-   [Take](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#Take)
+-   [Tee](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#Tee)
+
+### 3. Condition package contains some functions for conditional judgment. eg. And, Or, TernaryOperator...
+
+```go
+import "github.com/duke-git/lancet/v2/condition"
+```
+
+#### Function list:
+
+-   [Bool](https://github.com/duke-git/lancet/blob/main/docs/condition.md#Bool)
+-   [And](https://github.com/duke-git/lancet/blob/main/docs/condition.md#And)
+-   [Or](https://github.com/duke-git/lancet/blob/main/docs/condition.md#Or)
+-   [Xor](https://github.com/duke-git/lancet/blob/main/docs/condition.md#Xor)
+-   [Nor](https://github.com/duke-git/lancet/blob/main/docs/condition.md#Nor)
+-   [Nand](https://github.com/duke-git/lancet/blob/main/docs/condition.md#Nand)
+-   [TernaryOperator](https://github.com/duke-git/lancet/blob/main/docs/condition.md#TernaryOperator)
+
+### 4. Convertor package contains some functions for data convertion.

 ```go
 import "github.com/duke-git/lancet/v2/convertor"
 ```
+
 #### Function list:
- [ColorHexToRGB](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ColorHexToRGB)
- [ColorRGBToHex](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ColorRGBToHex)
- [ToBool](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToBool)
- [ToBytes](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToBytes)
- [ToChar](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToChar)
- [ToChannel](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToChannel)
- [ToFloat](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToFloat)
- [ToInt](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToInt)
- [ToJson](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToJson)
- [ToMap](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToMap)
- [ToPointer](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToPointer)
- [ToString](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToString)
- [StructToMap](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#StructToMap)
- [MapToSlice](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#MapToSlice)
-  
-### 4. Cryptor package is for data encryption and decryption.
+
+-   [ColorHexToRGB](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ColorHexToRGB)
+-   [ColorRGBToHex](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ColorRGBToHex)
+-   [ToBool](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToBool)
+-   [ToBytes](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToBytes)
+-   [ToChar](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToChar)
+-   [ToChannel](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToChannel)
+-   [ToFloat](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToFloat)
+-   [ToInt](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToInt)
+-   [ToJson](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToJson)
+-   [ToMap](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToMap)
+-   [ToPointer](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToPointer)
+-   [ToString](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToString)
+-   [StructToMap](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#StructToMap)
+-   [MapToSlice](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#MapToSlice)
+-   [EncodeByte](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#EncodeByte)
+-   [DecodeByte](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#DecodeByte)
+
+### 5. Cryptor package is for data encryption and decryption.

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

 #### Function list:
- [AesEcbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesEcbEncrypt)
- [AesEcbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesEcbDecrypt)
- [AesCbcEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCbcEncrypt)
- [AesCbcDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCbcDecrypt)
- [AesCtrCrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCtrCrypt)
- [AesCfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCfbEncrypt)
- [AesCfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCfbDecrypt)
- [AesOfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesOfbEncrypt)
- [AesOfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesOfbDecrypt)
- [Base64StdEncode](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Base64StdEncode)
- [Base64StdDecode](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Base64StdDecode)
- [DesEcbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesEcbEncrypt)
- [DesEcbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesEcbDecrypt)
- [DesCbcEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCbcEncrypt)
- [DesCbcDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCbcDecrypt)
- [DesCtrCrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCtrCrypt)
- [DesCfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCfbEncrypt)
- [DesCfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCfbDecrypt)
- [DesOfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesOfbEncrypt)
- [DesOfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesOfbDecrypt)
- [HmacMd5](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#HmacMd5)
- [HmacSha1](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#HmacSha1)
- [HmacSha256](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#HmacSha256)
- [HmacSha512](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#HmacSha512)
- [Md5String](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Md5String)
- [Md5File](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Md5File)
- [Sha1](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Sha1)
- [Sha256](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Sha256)
- [Sha512](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Sha512)
- [GenerateRsaKey](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#GenerateRsaKey)
- [RsaEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#RsaEncrypt)
- [RsaDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#RsaDecrypt)

-### 5. Datetime package supports date and time format and compare.
+-   [AesEcbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesEcbEncrypt)
+-   [AesEcbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesEcbDecrypt)
+-   [AesCbcEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCbcEncrypt)
+-   [AesCbcDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCbcDecrypt)
+-   [AesCtrCrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCtrCrypt)
+-   [AesCfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCfbEncrypt)
+-   [AesCfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCfbDecrypt)
+-   [AesOfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesOfbEncrypt)
+-   [AesOfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesOfbDecrypt)
+-   [Base64StdEncode](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Base64StdEncode)
+-   [Base64StdDecode](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Base64StdDecode)
+-   [DesEcbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesEcbEncrypt)
+-   [DesEcbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesEcbDecrypt)
+-   [DesCbcEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCbcEncrypt)
+-   [DesCbcDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCbcDecrypt)
+-   [DesCtrCrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCtrCrypt)
+-   [DesCfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCfbEncrypt)
+-   [DesCfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCfbDecrypt)
+-   [DesOfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesOfbEncrypt)
+-   [DesOfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesOfbDecrypt)
+-   [HmacMd5](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#HmacMd5)
+-   [HmacSha1](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#HmacSha1)
+-   [HmacSha256](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#HmacSha256)
+-   [HmacSha512](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#HmacSha512)
+-   [Md5String](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Md5String)
+-   [Md5File](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Md5File)
+-   [Sha1](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Sha1)
+-   [Sha256](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Sha256)
+-   [Sha512](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Sha512)
+-   [GenerateRsaKey](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#GenerateRsaKey)
+-   [RsaEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#RsaEncrypt)
+-   [RsaDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#RsaDecrypt)

+### 6. Datetime package supports date and time format and compare.

 ```go
 import "github.com/duke-git/lancet/v2/datetime"
 ```
+
 #### Function list:
- [AddDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#AddDay)
- [AddHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#AddHour)
- [AddMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#AddMinute)
- [BeginOfMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfMinute)
- [BeginOfHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfHour)
- [BeginOfDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfDay)
- [BeginOfWeek](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfWeek)
- [BeginOfMonth](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfMonth)
- [BeginOfYear](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfYear)
- [EndOfMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfMinute)
- [EndOfHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfHour)
- [EndOfDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfDay)
- [EndOfWeek](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfWeek)
- [EndOfMonth](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfMonth)
- [EndOfYear](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfYear)
- [GetNowDate](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetNowDate)
- [GetNowTime](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetNowTime)
- [GetNowDateTime](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetNowDateTime)
- [GetZeroHourTimestamp](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetZeroHourTimestamp)
- [GetNightTimestamp](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetNightTimestamp)
- [FormatTimeToStr](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#FormatTimeToStr)
- [FormatStrToTime](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#FormatStrToTime)
- [NewUnix](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#NewUnix)
- [NewUnixNow](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#NewUnixNow)
- [NewFormat](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#NewFormat)
- [NewISO8601](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#NewISO8601)
- [ToUnix](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#ToUnix)
- [ToFormat](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#ToFormat)
- [ToFormatForTpl](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#ToFormatForTpl)
- [ToIso8601](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#ToIso8601)

+-   [AddDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#AddDay)
+-   [AddHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#AddHour)
+-   [AddMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#AddMinute)
+-   [BeginOfMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfMinute)
+-   [BeginOfHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfHour)
+-   [BeginOfDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfDay)
+-   [BeginOfWeek](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfWeek)
+-   [BeginOfMonth](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfMonth)
+-   [BeginOfYear](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfYear)
+-   [EndOfMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfMinute)
+-   [EndOfHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfHour)
+-   [EndOfDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfDay)
+-   [EndOfWeek](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfWeek)
+-   [EndOfMonth](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfMonth)
+-   [EndOfYear](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfYear)
+-   [GetNowDate](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetNowDate)
+-   [GetNowTime](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetNowTime)
+-   [GetNowDateTime](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetNowDateTime)
+-   [GetZeroHourTimestamp](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetZeroHourTimestamp)
+-   [GetNightTimestamp](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetNightTimestamp)
+-   [FormatTimeToStr](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#FormatTimeToStr)
+-   [FormatStrToTime](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#FormatStrToTime)
+-   [NewUnix](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#NewUnix)
+-   [NewUnixNow](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#NewUnixNow)
+-   [NewFormat](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#NewFormat)
+-   [NewISO8601](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#NewISO8601)
+-   [ToUnix](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#ToUnix)
+-   [ToFormat](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#ToFormat)
+-   [ToFormatForTpl](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#ToFormatForTpl)
+-   [ToIso8601](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#ToIso8601)

-
-### 6. Datastructure package constains some common data structure. eg. list, linklist, stack, queue, set, tree, graph.
-
+### 7. Datastructure package constains some common data structure. eg. list, linklist, stack, queue, set, tree, graph.

 ```go
 import list "github.com/duke-git/lancet/v2/datastructure/list"
@@ -219,18 +246,21 @@ import queue "github.com/duke-git/lancet/v2/datastructure/queue"
 import set "github.com/duke-git/lancet/v2/datastructure/set"
 import tree "github.com/duke-git/lancet/v2/datastructure/tree"
 import heap "github.com/duke-git/lancet/v2/datastructure/heap"
+import hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
 ```
+
 #### Function list:
- [List](https://github.com/duke-git/lancet/blob/main/docs/datastructure/list.md)
- [Linklist](https://github.com/duke-git/lancet/blob/main/docs/datastructure/linklist.md)
- [Stack](https://github.com/duke-git/lancet/blob/main/docs/datastructure/stack.md)
- [Queue](https://github.com/duke-git/lancet/blob/main/docs/datastructure/queue.md)
- [Set](https://github.com/duke-git/lancet/blob/main/docs/datastructure/set.md)
- [Tree](https://github.com/duke-git/lancet/blob/main/docs/datastructure/tree.md)
- [Heap](https://github.com/duke-git/lancet/blob/main/docs/datastructure/heap.md)

+-   [List](https://github.com/duke-git/lancet/blob/main/docs/datastructure/list.md)
+-   [Linklist](https://github.com/duke-git/lancet/blob/main/docs/datastructure/linklist.md)
+-   [Stack](https://github.com/duke-git/lancet/blob/main/docs/datastructure/stack.md)
+-   [Queue](https://github.com/duke-git/lancet/blob/main/docs/datastructure/queue.md)
+-   [Set](https://github.com/duke-git/lancet/blob/main/docs/datastructure/set.md)
+-   [Tree](https://github.com/duke-git/lancet/blob/main/docs/datastructure/tree.md)
+-   [Heap](https://github.com/duke-git/lancet/blob/main/docs/datastructure/heap.md)
+-   [HashMap](https://github.com/duke-git/lancet/blob/main/docs/datastructure/hashmap.md)

-### 7. Fileutil package implements some basic functions for file operations.
+### 8. Fileutil package implements some basic functions for file operations.

 ```go
 import "github.com/duke-git/lancet/v2/fileutil"
@@ -238,226 +268,256 @@ import "github.com/duke-git/lancet/v2/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)
- [IsExist](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#IsExist)
- [IsLink](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#IsLink)
- [IsDir](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#IsDir)
- [ListFileNames](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#ListFileNames)
- [RemoveFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#RemoveFile)
- [ReadFileToString](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#ReadFileToString)
- [ReadFileByLine](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#ReadFileByLine)
- [Zip](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#Zip)
- [UnZip](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#UnZip)
+-   [ClearFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#ClearFile)
+-   [CreateFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#CreateFile)
+-   [CreateDir](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#CreateDir)
+-   [CopyFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#CopyFile)
+-   [FileMode](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#FileMode)
+-   [MiMeType](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#MiMeType)
+-   [IsExist](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#IsExist)
+-   [IsLink](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#IsLink)
+-   [IsDir](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#IsDir)
+-   [ListFileNames](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#ListFileNames)
+-   [RemoveFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#RemoveFile)
+-   [ReadFileToString](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#ReadFileToString)
+-   [ReadFileByLine](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#ReadFileByLine)
+-   [Zip](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#Zip)
+-   [UnZip](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#UnZip)

-### 8. Formatter contains some functions for data formatting.
+### 9. Formatter contains some functions for data formatting.

 ```go
 import "github.com/duke-git/lancet/v2/formatter"
 ```
-#### Function list:
- [Comma](https://github.com/duke-git/lancet/blob/main/docs/formatter.md#Comma)

-### 9. Function package can control the flow of function execution and support part of functional programming
+#### Function list:
+
+-   [Comma](https://github.com/duke-git/lancet/blob/main/docs/formatter.md#Comma)
+
+### 10. Function package can control the flow of function execution and support part of functional programming

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

 #### Function list:
- [After](https://github.com/duke-git/lancet/blob/main/docs/function.md#After)
- [Before](https://github.com/duke-git/lancet/blob/main/docs/function.md#Before)
- [Curry](https://github.com/duke-git/lancet/blob/main/docs/function.md#Curry)
- [Compose](https://github.com/duke-git/lancet/blob/main/docs/function.md#Compose)
- [Debounced](https://github.com/duke-git/lancet/blob/main/docs/function.md#Debounced)
- [Delay](https://github.com/duke-git/lancet/blob/main/docs/function.md#Delay)
- [Watcher](https://github.com/duke-git/lancet/blob/main/docs/function.md#Watcher)

+-   [After](https://github.com/duke-git/lancet/blob/main/docs/function.md#After)
+-   [Before](https://github.com/duke-git/lancet/blob/main/docs/function.md#Before)
+-   [Curry](https://github.com/duke-git/lancet/blob/main/docs/function.md#Curry)
+-   [Compose](https://github.com/duke-git/lancet/blob/main/docs/function.md#Compose)
+-   [Debounced](https://github.com/duke-git/lancet/blob/main/docs/function.md#Debounced)
+-   [Delay](https://github.com/duke-git/lancet/blob/main/docs/function.md#Delay)
+-   [Pipeline](https://github.com/duke-git/lancet/blob/main/docs/function.md#Pipeline)
+-   [Watcher](https://github.com/duke-git/lancet/blob/main/docs/function.md#Watcher)

-### 10. Maputil package includes some functions to manipulate map.
+### 11. Maputil package includes some functions to manipulate map.

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

 #### Function list:
- [ForEach](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#ForEach)
- [Filter](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#Filter)
- [Intersect](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#Intersect)
- [Keys](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#Keys)
- [Merge](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#Merge)
- [Minus](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#Minus)
- [Values](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#Values)
- [IsDisjoint](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#IsDisjoint)

+-   [ForEach](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#ForEach)
+-   [Filter](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#Filter)
+-   [Intersect](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#Intersect)
+-   [Keys](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#Keys)
+-   [Merge](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#Merge)
+-   [Minus](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#Minus)
+-   [Values](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#Values)
+-   [IsDisjoint](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#IsDisjoint)

-### 11. Mathutil package implements some functions for math calculation.
+### 12. Mathutil package implements some functions for math calculation.

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

 #### Function list:
- [Average](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Average)
- [Exponent](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Exponent)
- [Fibonacci](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Fibonacci)
- [Factorial](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Factorial)
- [Max](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Max)
- [MaxBy](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#MaxBy)
- [Min](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Min)
- [MinBy](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#MinBy)
- [Percent](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Percent)
- [RoundToFloat](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#RoundToFloat)
- [RoundToString](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#RoundToString)
- [TruncRound](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#TruncRound)

+-   [Average](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Average)
+-   [Exponent](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Exponent)
+-   [Fibonacci](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Fibonacci)
+-   [Factorial](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Factorial)
+-   [Max](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Max)
+-   [MaxBy](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#MaxBy)
+-   [Min](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Min)
+-   [MinBy](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#MinBy)
+-   [Percent](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Percent)
+-   [RoundToFloat](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#RoundToFloat)
+-   [RoundToString](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#RoundToString)
+-   [TruncRound](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#TruncRound)

-### 12. Netutil package contains functions to get net information and send http request.
+### 13. Netutil package contains functions to get net information and send http request.

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

 #### Function list:
- [ConvertMapToQueryString](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#ConvertMapToQueryString)
- [EncodeUrl](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#EncodeUrl)
- [GetInternalIp](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetInternalIp)
- [GetIps](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetIps)
- [GetMacAddrs](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetMacAddrs)
- [GetPublicIpInfo](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetPublicIpInfo)
- [GetRequestPublicIp](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetRequestPublicIp)
- [IsPublicIP](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#IsPublicIP)
- [IsInternalIP](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#IsInternalIP)
- [HttpGet](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpGet)
- [HttpDelete](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpDelete)
- [HttpPost](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpPost)
- [HttpPut](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpPut)
- [HttpPatch](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpPatch)
- [ParseHttpResponse](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#ParseHttpResponse)

-### 13. Random package implements some basic functions to generate random int and string.
+-   [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)
+-   [HttpRequest](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpRequest)
+-   [HttpClient](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpClient)
+-   [SendRequest](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#SendRequest)
+-   [DecodeResponse](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#DecodeResponse)
+-   [StructToUrlValues](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#StructToUrlValues)
+-   [HttpGet<sup>deprecated</sup>](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpGet)
+-   [HttpDelete<sup>deprecated</sup>](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpDelete)
+-   [HttpPost<sup>deprecated</sup>](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpPost)
+-   [HttpPut<sup>deprecated</sup>](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpPut)
+-   [HttpPatch<sup>deprecated</sup>](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)
+
+### 14. Random package implements some basic functions to generate random int and string.

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

 #### Function list:
- [RandBytes](https://github.com/duke-git/lancet/blob/main/docs/random.md#RandBytes)
- [RandInt](https://github.com/duke-git/lancet/blob/main/docs/random.md#RandInt)
- [RandString](https://github.com/duke-git/lancet/blob/main/docs/random.md#RandString)
- [UUIdV4](https://github.com/duke-git/lancet/blob/main/docs/random.md#UUIdV4)

-### 14. Retry package is for executing a function repeatedly until it was successful or canceled by the context.
+-   [RandBytes](https://github.com/duke-git/lancet/blob/main/docs/random.md#RandBytes)
+-   [RandInt](https://github.com/duke-git/lancet/blob/main/docs/random.md#RandInt)
+-   [RandString](https://github.com/duke-git/lancet/blob/main/docs/random.md#RandString)
+-   [RandUpper](https://github.com/duke-git/lancet/blob/main/docs/random.md#RandUpper)
+-   [RandLower](https://github.com/duke-git/lancet/blob/main/docs/random.md#RandLower)
+-   [RandNumeral](https://github.com/duke-git/lancet/blob/main/docs/random.md#RandNumeral)
+-   [RandNumeralOrLetter](https://github.com/duke-git/lancet/blob/main/docs/random.md#RandNumeralOrLetter)
+-   [UUIdV4](https://github.com/duke-git/lancet/blob/main/docs/random.md#UUIdV4)
+
+### 15. Retry package is for executing a function repeatedly until it was successful or canceled by the context.

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

 #### Function list:
- [Context](https://github.com/duke-git/lancet/blob/main/docs/retry.md#Context)
- [Retry](https://github.com/duke-git/lancet/blob/main/docs/retry.md#Retry)
- [RetryFunc](https://github.com/duke-git/lancet/blob/main/docs/retry.md#RetryFunc)
- [RetryDuration](https://github.com/duke-git/lancet/blob/main/docs/retry.md#RetryDuration)
- [RetryTimes](https://github.com/duke-git/lancet/blob/main/docs/retry.md#RetryTimes)

-### 15. Slice contains some functions to manipulate slice.
+-   [Context](https://github.com/duke-git/lancet/blob/main/docs/retry.md#Context)
+-   [Retry](https://github.com/duke-git/lancet/blob/main/docs/retry.md#Retry)
+-   [RetryFunc](https://github.com/duke-git/lancet/blob/main/docs/retry.md#RetryFunc)
+-   [RetryDuration](https://github.com/duke-git/lancet/blob/main/docs/retry.md#RetryDuration)
+-   [RetryTimes](https://github.com/duke-git/lancet/blob/main/docs/retry.md#RetryTimes)
+
+### 16. Slice contains some functions to manipulate slice.

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

 #### Function list:
- [AppendIfAbsent](https://github.com/duke-git/lancet/blob/main/docs/slice.md#AppendIfAbsent)
- [Contain](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Contain)
- [ContainSubSlice](https://github.com/duke-git/lancet/blob/main/docs/slice.md#ContainSubSlice)
- [Chunk](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Chunk)
- [Compact](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Compact)
- [Concat](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Concat)
- [Count](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Count)
- [Difference](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Difference)
- [DifferenceBy](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DifferenceBy)
- [DifferenceWith](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DifferenceWith)
- [DeleteAt](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DeleteAt)
- [Drop](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Drop)
- [Equal](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Equal)
- [EqualWith](https://github.com/duke-git/lancet/blob/main/docs/slice.md#EqualWith)
- [Every](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Every)
- [Filter](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Filter)
- [Find](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Find)
- [FindLast](https://github.com/duke-git/lancet/blob/main/docs/slice.md#FindLast)
- [Flatten](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Flatten)
- [FlattenDeep](https://github.com/duke-git/lancet/blob/main/docs/slice.md#FlattenDeep)
- [ForEach](https://github.com/duke-git/lancet/blob/main/docs/slice.md#ForEach)
- [GroupBy](https://github.com/duke-git/lancet/blob/main/docs/slice.md#GroupBy)
- [GroupWith](https://github.com/duke-git/lancet/blob/main/docs/slice.md#GroupWith)
- [IntSlice](https://github.com/duke-git/lancet/blob/main/docs/slice.md#IntSlice)
- [InterfaceSlice](https://github.com/duke-git/lancet/blob/main/docs/slice.md#InterfaceSlice)
- [Intersection](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Intersection)
- [InsertAt](https://github.com/duke-git/lancet/blob/main/docs/slice.md#InsertAt)
- [IndexOf](https://github.com/duke-git/lancet/blob/main/docs/slice.md#IndexOf)
- [LastIndexOf](https://github.com/duke-git/lancet/blob/main/docs/slice.md#LastIndexOf)
- [Map](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Map)
- [Reverse](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Reverse)
- [Reduce](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Reduce)
- [Shuffle](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Shuffle)
- [SortByField](https://github.com/duke-git/lancet/blob/main/docs/slice.md#SortByField)
- [Some](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Some)
- [StringSlice](https://github.com/duke-git/lancet/blob/main/docs/slice.md#StringSlice)
- [SymmetricDifference](https://github.com/duke-git/lancet/blob/main/docs/slice.md#SymmetricDifference)
- [ToSlice](https://github.com/duke-git/lancet/blob/main/docs/slice.md#ToSlice)
- [ToSlicePointer](https://github.com/duke-git/lancet/blob/main/docs/slice.md#ToSlicePointer)
- [Unique](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Unique)
- [UniqueBy](https://github.com/duke-git/lancet/blob/main/docs/slice.md#UniqueBy)
- [Union](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Union)
- [UpdateAt](https://github.com/duke-git/lancet/blob/main/docs/slice.md#UpdateAt)
- [Without](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Without)

-### 16. Strutil package contains some functions to manipulate string.
+-   [AppendIfAbsent](https://github.com/duke-git/lancet/blob/main/docs/slice.md#AppendIfAbsent)
+-   [Contain](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Contain)
+-   [ContainSubSlice](https://github.com/duke-git/lancet/blob/main/docs/slice.md#ContainSubSlice)
+-   [Chunk](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Chunk)
+-   [Compact](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Compact)
+-   [Concat](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Concat)
+-   [Count](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Count)
+-   [CountBy](https://github.com/duke-git/lancet/blob/main/docs/slice.md#CountBy)
+-   [Difference](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Difference)
+-   [DifferenceBy](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DifferenceBy)
+-   [DifferenceWith](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DifferenceWith)
+-   [DeleteAt](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DeleteAt)
+-   [Drop](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Drop)
+-   [Equal](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Equal)
+-   [EqualWith](https://github.com/duke-git/lancet/blob/main/docs/slice.md#EqualWith)
+-   [Every](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Every)
+-   [Filter](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Filter)
+-   [Find](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Find)
+-   [FindLast](https://github.com/duke-git/lancet/blob/main/docs/slice.md#FindLast)
+-   [Flatten](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Flatten)
+-   [FlattenDeep](https://github.com/duke-git/lancet/blob/main/docs/slice.md#FlattenDeep)
+-   [ForEach](https://github.com/duke-git/lancet/blob/main/docs/slice.md#ForEach)
+-   [GroupBy](https://github.com/duke-git/lancet/blob/main/docs/slice.md#GroupBy)
+-   [GroupWith](https://github.com/duke-git/lancet/blob/main/docs/slice.md#GroupWith)
+-   [IntSlice<sup>deprecated</sup>](https://github.com/duke-git/lancet/blob/main/docs/slice.md#IntSlice)
+-   [InterfaceSlice<sup>deprecated</sup>](https://github.com/duke-git/lancet/blob/main/docs/slice.md#InterfaceSlice)
+-   [Intersection](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Intersection)
+-   [InsertAt](https://github.com/duke-git/lancet/blob/main/docs/slice.md#InsertAt)
+-   [IndexOf](https://github.com/duke-git/lancet/blob/main/docs/slice.md#IndexOf)
+-   [LastIndexOf](https://github.com/duke-git/lancet/blob/main/docs/slice.md#LastIndexOf)
+-   [Map](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Map)
+-   [Merge](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Merge)
+-   [Reverse](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Reverse)
+-   [Reduce](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Reduce)
+-   [Replace](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Replace)
+-   [ReplaceAll](https://github.com/duke-git/lancet/blob/main/docs/slice.md#ReplaceAll)
+-   [Repeat](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Repeat)
+-   [Shuffle](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Shuffle)
+-   [Sort](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Sort)
+-   [SortBy](https://github.com/duke-git/lancet/blob/main/docs/slice.md#SortBy)
+-   [SortByField<sup>deprecated</sup>](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<sup>deprecated</sup>](https://github.com/duke-git/lancet/blob/main/docs/slice.md#StringSlice)
+-   [SymmetricDifference](https://github.com/duke-git/lancet/blob/main/docs/slice.md#SymmetricDifference)
+-   [ToSlice](https://github.com/duke-git/lancet/blob/main/docs/slice.md#ToSlice)
+-   [ToSlicePointer](https://github.com/duke-git/lancet/blob/main/docs/slice.md#ToSlicePointer)
+-   [Unique](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Unique)
+-   [UniqueBy](https://github.com/duke-git/lancet/blob/main/docs/slice.md#UniqueBy)
+-   [Union](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Union)
+-   [UnionBy](https://github.com/duke-git/lancet/blob/main/docs/slice.md#UnionBy)
+-   [UpdateAt](https://github.com/duke-git/lancet/blob/main/docs/slice.md#UpdateAt)
+-   [Without](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Without)
+-   [KeyBy](https://github.com/duke-git/lancet/blob/main/docs/slice.md#KeyBy)
+
+### 17. Strutil package contains some functions to manipulate string.
+
 ```go
 import "github.com/duke-git/lancet/v2/strutil"
 ```

 #### Function list:

- [After](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#After)
- [AfterLast](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#AfterLast)
- [Before](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#Before)
- [BeforeLast](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#BeforeLast)
- [CamelCase](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#CamelCase)
- [Capitalize](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#Capitalize)
- [IsString](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#IsString)
- [KebabCase](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#KebabCase)
- [LowerFirst](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#LowerFirst)
- [UpperFirst](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#UpperFirst)
- [PadEnd](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#PadEnd)
- [PadStart](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#PadStart)
- [Reverse](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#Reverse)
- [SnakeCase](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#SnakeCase)
- [SplitEx](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#SplitEx)
- [Wrap](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#Wrap)
- [Unwrap](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#Unwrap)
-  
-### 17. System package contain some functions about os, runtime, shell command.
+-   [After](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#After)
+-   [AfterLast](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#AfterLast)
+-   [Before](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#Before)
+-   [BeforeLast](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#BeforeLast)
+-   [CamelCase](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#CamelCase)
+-   [Capitalize](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#Capitalize)
+-   [IsString](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#IsString)
+-   [KebabCase](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#KebabCase)
+-   [UpperKebabCase](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#UpperKebabCase)
+-   [LowerFirst](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#LowerFirst)
+-   [UpperFirst](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#UpperFirst)
+-   [PadEnd](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#PadEnd)
+-   [PadStart](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#PadStart)
+-   [Reverse](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#Reverse)
+-   [SnakeCase](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#SnakeCase)
+-   [UpperSnakeCase](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#UpperSnakeCase)
+-   [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)
+
+### 19. System package contain some functions about os, runtime, shell command.

 ```go
 import "github.com/duke-git/lancet/v2/system"
 ```
-#### Function list:
- [IsWindows](https://github.com/duke-git/lancet/blob/main/docs/system.md#IsWindows)
- [IsLinux](https://github.com/duke-git/lancet/blob/main/docs/system.md#IsLinux)
- [IsMac](https://github.com/duke-git/lancet/blob/main/docs/system.md#IsMac)
- [GetOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system.md#GetOsEnv)
- [SetOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system.md#SetOsEnv)
- [RemoveOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system.md#RemoveOsEnv)
- [CompareOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system.md#CompareOsEnv)
- [ExecCommand](https://github.com/duke-git/lancet/blob/main/docs/system.md#ExecCommand)
- [GetOsBits](https://github.com/duke-git/lancet/blob/main/docs/system.md#GetOsBits)

-### 18. Validator package contains some functions for data validation.
+#### Function list:
+
+-   [IsWindows](https://github.com/duke-git/lancet/blob/main/docs/system.md#IsWindows)
+-   [IsLinux](https://github.com/duke-git/lancet/blob/main/docs/system.md#IsLinux)
+-   [IsMac](https://github.com/duke-git/lancet/blob/main/docs/system.md#IsMac)
+-   [GetOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system.md#GetOsEnv)
+-   [SetOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system.md#SetOsEnv)
+-   [RemoveOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system.md#RemoveOsEnv)
+-   [CompareOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system.md#CompareOsEnv)
+-   [ExecCommand](https://github.com/duke-git/lancet/blob/main/docs/system.md#ExecCommand)
+-   [GetOsBits](https://github.com/duke-git/lancet/blob/main/docs/system.md#GetOsBits)
+
+### 19. Validator package contains some functions for data validation.

 ```go
 import "github.com/duke-git/lancet/v2/validator"
@@ -465,40 +525,44 @@ import "github.com/duke-git/lancet/v2/validator"

 #### Function list:

- [ContainChinese](https://github.com/duke-git/lancet/blob/main/docs/validator.md#ContainChinese)
- [ContainLetter](https://github.com/duke-git/lancet/blob/main/docs/validator.md#ContainLetter)
- [ContainLower](https://github.com/duke-git/lancet/blob/main/docs/validator.md#ContainLower)
- [ContainUpper](https://github.com/duke-git/lancet/blob/main/docs/validator.md#ContainUpper)
- [IsAlpha](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsAlpha)
- [IsAllUpper](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsAllUpper)
- [IsAllLower](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsAllLower)
- [IsBase64](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsBase64)
- [IsChineseMobile](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsChineseMobile)
- [IsChineseIdNum](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsChineseIdNum)
- [IsChinesePhone](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsChinesePhone)
- [IsCreditCard](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsCreditCard)
- [IsDns](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsDns)
- [IsEmail](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsEmail)
- [IsEmptyString](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsEmptyString)
- [IsFloatStr](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsFloatStr)
- [IsNumberStr](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsNumberStr)
- [IsJSON](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsJSON)
- [IsRegexMatch](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsRegexMatch)
- [IsIntStr](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsIntStr)
- [IsIp](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsIp)
- [IsIpV4](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsIpV4)
- [IsIpV6](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsIpV6)
- [IsStrongPassword](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsStrongPassword)
- [IsUrl](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsUrl)
- [IsWeakPassword](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsWeakPassword)
-### 19. xerror package implements helpers for errors.
+-   [ContainChinese](https://github.com/duke-git/lancet/blob/main/docs/validator.md#ContainChinese)
+-   [ContainLetter](https://github.com/duke-git/lancet/blob/main/docs/validator.md#ContainLetter)
+-   [ContainLower](https://github.com/duke-git/lancet/blob/main/docs/validator.md#ContainLower)
+-   [ContainUpper](https://github.com/duke-git/lancet/blob/main/docs/validator.md#ContainUpper)
+-   [IsAlpha](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsAlpha)
+-   [IsAllUpper](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsAllUpper)
+-   [IsAllLower](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsAllLower)
+-   [IsBase64](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsBase64)
+-   [IsChineseMobile](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsChineseMobile)
+-   [IsChineseIdNum](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsChineseIdNum)
+-   [IsChinesePhone](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsChinesePhone)
+-   [IsCreditCard](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsCreditCard)
+-   [IsDns](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsDns)
+-   [IsEmail](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsEmail)
+-   [IsEmptyString](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsEmptyString)
+-   [IsFloatStr](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsFloatStr)
+-   [IsNumberStr](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsNumberStr)
+-   [IsJSON](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsJSON)
+-   [IsRegexMatch](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsRegexMatch)
+-   [IsIntStr](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsIntStr)
+-   [IsIp](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsIp)
+-   [IsIpV4](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsIpV4)
+-   [IsIpV6](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsIpV6)
+-   [IsStrongPassword](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsStrongPassword)
+-   [IsUrl](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsUrl)
+-   [IsWeakPassword](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsWeakPassword)
+-   [IsZeroValue](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsZeroValue)
+-   [IsGBK](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsGBK)
+
+### 20. 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)
-  
+
+-   [Unwrap](https://github.com/duke-git/lancet/blob/main/docs/xerror.md#Unwrap)

 ## How to Contribute

--- a/README_zh-CN.md
+++ b/README_zh-CN.md
@@ -1,15 +1,16 @@
 <div align=center>
-<img src="./logo.png" width="200" height="200"/>
+<a href="https://uvdream.github.io/lancet-docs/"><img src="./logo.png" width="200" height="200"/><a/>

 <br/>

 ![Go version](https://img.shields.io/badge/go-%3E%3Dv1.18-9cf)
-[![Release](https://img.shields.io/badge/release-2.1.5-green.svg)](https://github.com/duke-git/lancet/releases)
+[![Release](https://img.shields.io/badge/release-2.1.12-green.svg)](https://github.com/duke-git/lancet/releases)
 [![GoDoc](https://godoc.org/github.com/duke-git/lancet/v2?status.svg)](https://pkg.go.dev/github.com/duke-git/lancet/v2)
 [![Go Report Card](https://goreportcard.com/badge/github.com/duke-git/lancet/v2)](https://goreportcard.com/report/github.com/duke-git/lancet/v2)
 [![test](https://github.com/duke-git/lancet/actions/workflows/codecov.yml/badge.svg?branch=main&event=push)](https://github.com/duke-git/lancet/actions/workflows/codecov.yml)
 [![codecov](https://codecov.io/gh/duke-git/lancet/branch/main/graph/badge.svg?token=FC48T1F078)](https://codecov.io/gh/duke-git/lancet)
 [![License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/duke-git/lancet/blob/main/LICENSE)
+
 </div>

 <div STYLE="page-break-after: always;"></div>
@@ -19,30 +20,32 @@

 简体中文 | [English](./README.md)

-
 ## 特性

- 👏 全面、高效、可复用
- 💪 300+常用go工具函数，支持string、slice、datetime、net、crypt...
- 💅 只依赖go标准库
- 🌍 所有导出函数单元测试覆盖率100%
+-   👏 全面、高效、可复用
+-   💪 300+常用 go 工具函数，支持 string、slice、datetime、net、crypt...
+-   💅 只依赖 go 标准库
+-   🌍 所有导出函数单元测试覆盖率 100%

 ## 安装
-### Note: 
-1. <b>对于使用go1.18及以上的用户，建议安装v2.x.x。 因为v2.x.x用go1.18的泛型重写了大部分函数。</b>
+
+### 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v1.3.1。</b>
+2. <b>使用 go1.18 以下版本的用户，必须安装 v1.x.x。目前最新的 v1 版本是 v1.3.5。</b>
+
 ```go
-go get github.com/duke-git/lancet@v1.3.1 // 使用go1.18以下版本, 必须安装v1.x.x版本
+go get github.com/duke-git/lancet@v1.3.5 // 使用go1.18以下版本, 必须安装v1.x.x版本
 ```

 ## 用法

-lancet是以包的结构组织代码的，使用时需要导入相应的包名。例如：如果使用字符串相关函数，需要导入strutil包:
+lancet 是以包的结构组织代码的，使用时需要导入相应的包名。例如：如果使用字符串相关函数，需要导入 strutil 包:

 ```go
 import "github.com/duke-git/lancet/v2/strutil"
@@ -50,7 +53,7 @@ import "github.com/duke-git/lancet/v2/strutil"

 ## 例子

-此处以字符串工具函数Reverse（逆序字符串）为例，需要导入strutil包:
+此处以字符串工具函数 Reverse（逆序字符串）为例，需要导入 strutil 包:

 ```go
 package main
@@ -67,146 +70,172 @@ func main() {
 }
 ```

-## API文档
+## API 文档

-### 1. algorithm算法包实现一些基本算法。eg. sort, search.
+## [lancet API doc](https://uvdream.github.io/lancet-docs/) 感谢[@UvDream](https://github.com/UvDream)整理
+
+### 1. algorithm 算法包实现一些基本算法。eg. sort, search.

 ```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)

+-   [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)

-### 2. 并发包包含一些支持并发编程的功能。例如：goroutine, channel, async等。
+### 2. concurrency 并发包包含一些支持并发编程的功能。例如：goroutine, channel, async 等。

 ```go
 import "github.com/duke-git/lancet/v2/concurrency"
 ```
+
 #### Function list:
- [NewChannel](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#NewChannel)
- [Bridge](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#Bridge)
- [FanIn](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#FanIn)
- [Generate](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#Generate)
- [Or](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#Or)
- [OrDone](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#OrDone)
- [Repeat](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#Repeat)
- [RepeatFn](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#RepeatFn)
- [Take](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#Take)
- [Tee](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#Tee)
-  
-### 3. convertor转换器包支持一些常见的数据类型转换。
+
+-   [NewChannel](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#NewChannel)
+-   [Bridge](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#Bridge)
+-   [FanIn](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#FanIn)
+-   [Generate](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#Generate)
+-   [Or](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#Or)
+-   [OrDone](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#OrDone)
+-   [Repeat](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#Repeat)
+-   [RepeatFn](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#RepeatFn)
+-   [Take](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#Take)
+-   [Tee](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#Tee)
+
+### 3. condition 条件包含一些用于条件判断的函数。eg. And, Or, TernaryOperator...
+
+```go
+import "github.com/duke-git/lancet/v2/condition"
+```
+
+#### Function list:
+
+-   [Bool](https://github.com/duke-git/lancet/blob/main/docs/condition_zh-CN.md#Bool)
+-   [And](https://github.com/duke-git/lancet/blob/main/docs/condition_zh-CN.md#And)
+-   [Or](https://github.com/duke-git/lancet/blob/main/docs/condition_zh-CN.md#Or)
+-   [Xor](https://github.com/duke-git/lancet/blob/main/docs/condition_zh-CN.md#Xor)
+-   [Nor](https://github.com/duke-git/lancet/blob/main/docs/condition_zh-CN.md#Nor)
+-   [Nand](https://github.com/duke-git/lancet/blob/main/docs/condition_zh-CN.md#Nand)
+-   [TernaryOperator](https://github.com/duke-git/lancet/blob/main/docs/condition_zh-CN.md#TernaryOperator)
+
+### 4. convertor 转换器包支持一些常见的数据类型转换。

 ```go
 import "github.com/duke-git/lancet/v2/convertor"
 ```
+
 #### 函数列表:
- [ColorHexToRGB](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ColorHexToRGB)
- [ColorRGBToHex](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ColorRGBToHex)
- [ToBool](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToBool)
- [ToBytes](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToBytes)
- [ToChar](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToChar)
- [ToChannel](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToChannel)
- [ToFloat](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToFloat)
- [ToInt](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToInt)
- [ToJson](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToJson)
- [ToMap](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToMap)
- [ToPointer](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToPointer)
- [ToString](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToString)
- [StructToMap](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#StructToMap)
- [MapToSlice](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#MapToSlice)
-### 4. cryptor加密包支持数据加密和解密，获取md5，hash值。支持base64, md5, hmac, aes, des, rsa。
+
+-   [ColorHexToRGB](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ColorHexToRGB)
+-   [ColorRGBToHex](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ColorRGBToHex)
+-   [ToBool](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToBool)
+-   [ToBytes](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToBytes)
+-   [ToChar](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToChar)
+-   [ToChannel](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToChannel)
+-   [ToFloat](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToFloat)
+-   [ToInt](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToInt)
+-   [ToJson](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToJson)
+-   [ToMap](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToMap)
+-   [ToPointer](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToPointer)
+-   [ToString](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToString)
+-   [StructToMap](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#StructToMap)
+-   [MapToSlice](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#MapToSlice)
+-   [EncodeByte](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#EncodeByte)
+-   [DecodeByte](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#DecodeByte)
+
+### 5. cryptor 加密包支持数据加密和解密，获取 md5，hash 值。支持 base64, md5, hmac, aes, des, rsa。

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

 #### 函数列表:
- [AesEcbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesEcbEncrypt)
- [AesEcbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesEcbDecrypt)
- [AesCbcEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCbcEncrypt)
- [AesCbcDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCbcDecrypt)
- [AesCtrCrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCtrCrypt)
- [AesCfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCfbEncrypt)
- [AesCfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCfbDecrypt)
- [AesOfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesOfbEncrypt)
- [AesOfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesOfbDecrypt)
- [Base64StdEncode](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Base64StdEncode)
- [Base64StdDecode](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Base64StdDecode)
- [DesEcbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesEcbEncrypt)
- [DesEcbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesEcbDecrypt)
- [DesCbcEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCbcEncrypt)
- [DesCbcDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCbcDecrypt)
- [DesCtrCrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCtrCrypt)
- [DesCfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCfbEncrypt)
- [DesCfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCfbDecrypt)
- [DesOfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesOfbEncrypt)
- [DesOfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesOfbDecrypt)
- [HmacMd5](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#HmacMd5)
- [HmacSha1](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#HmacSha1)
- [HmacSha256](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#HmacSha256)
- [HmacSha512](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#HmacSha512)
- [Md5String](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Md5String)
- [Md5File](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Md5File)
- [Sha1](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Sha1)
- [Sha256](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Sha256)
- [Sha512](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Sha512)
- [GenerateRsaKey](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#GenerateRsaKey)
- [RsaEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#RsaEncrypt)
- [RsaDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#RsaDecrypt)

-### 5. datetime日期时间处理包，格式化日期，比较日期。
+-   [AesEcbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesEcbEncrypt)
+-   [AesEcbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesEcbDecrypt)
+-   [AesCbcEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCbcEncrypt)
+-   [AesCbcDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCbcDecrypt)
+-   [AesCtrCrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCtrCrypt)
+-   [AesCfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCfbEncrypt)
+-   [AesCfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCfbDecrypt)
+-   [AesOfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesOfbEncrypt)
+-   [AesOfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesOfbDecrypt)
+-   [Base64StdEncode](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Base64StdEncode)
+-   [Base64StdDecode](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Base64StdDecode)
+-   [DesEcbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesEcbEncrypt)
+-   [DesEcbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesEcbDecrypt)
+-   [DesCbcEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCbcEncrypt)
+-   [DesCbcDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCbcDecrypt)
+-   [DesCtrCrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCtrCrypt)
+-   [DesCfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCfbEncrypt)
+-   [DesCfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCfbDecrypt)
+-   [DesOfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesOfbEncrypt)
+-   [DesOfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesOfbDecrypt)
+-   [HmacMd5](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#HmacMd5)
+-   [HmacSha1](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#HmacSha1)
+-   [HmacSha256](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#HmacSha256)
+-   [HmacSha512](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#HmacSha512)
+-   [Md5String](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Md5String)
+-   [Md5File](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Md5File)
+-   [Sha1](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Sha1)
+-   [Sha256](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Sha256)
+-   [Sha512](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Sha512)
+-   [GenerateRsaKey](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#GenerateRsaKey)
+-   [RsaEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#RsaEncrypt)
+-   [RsaDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#RsaDecrypt)

+### 6. 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"
 ```
+
 #### 函数列表:
- [AddDay](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#AddDay)
- [AddHour](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#AddHour)
- [AddMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#AddMinute)
- [BeginOfMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfMinute)
- [BeginOfHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfHour)
- [BeginOfDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfDay)
- [BeginOfWeek](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfWeek)
- [BeginOfMonth](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfMonth)
- [BeginOfYear](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfYear)
- [EndOfMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfMinute)
- [EndOfHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfHour)
- [EndOfDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfDay)
- [EndOfWeek](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfWeek)
- [EndOfMonth](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfMonth)
- [EndOfYear](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfYear)
- [GetNowDate](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetNowDate)
- [GetNowTime](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetNowTime)
- [GetNowDateTime](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetNowDateTime)
- [GetZeroHourTimestamp](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetZeroHourTimestamp)
- [GetNightTimestamp](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetNightTimestamp)
- [FormatTimeToStr](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#FormatTimeToStr)
- [FormatStrToTime](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#FormatStrToTime)
- [NewUnix](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#NewUnix)
- [NewUnixNow](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#NewUnixNow)
- [NewFormat](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#NewFormat)
- [NewISO8601](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#NewISO8601)
- [ToUnix](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#ToUnix)
- [ToFormat](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#ToFormat)
- [ToFormatForTpl](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#ToFormatForTpl)
- [ToIso8601](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#ToIso8601)

+-   [AddDay](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#AddDay)
+-   [AddHour](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#AddHour)
+-   [AddMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#AddMinute)
+-   [BeginOfMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfMinute)
+-   [BeginOfHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfHour)
+-   [BeginOfDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfDay)
+-   [BeginOfWeek](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfWeek)
+-   [BeginOfMonth](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfMonth)
+-   [BeginOfYear](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfYear)
+-   [EndOfMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfMinute)
+-   [EndOfHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfHour)
+-   [EndOfDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfDay)
+-   [EndOfWeek](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfWeek)
+-   [EndOfMonth](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfMonth)
+-   [EndOfYear](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfYear)
+-   [GetNowDate](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetNowDate)
+-   [GetNowTime](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetNowTime)
+-   [GetNowDateTime](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetNowDateTime)
+-   [GetZeroHourTimestamp](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetZeroHourTimestamp)
+-   [GetNightTimestamp](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetNightTimestamp)
+-   [FormatTimeToStr](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#FormatTimeToStr)
+-   [FormatStrToTime](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#FormatStrToTime)
+-   [NewUnix](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#NewUnix)
+-   [NewUnixNow](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#NewUnixNow)
+-   [NewFormat](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#NewFormat)
+-   [NewISO8601](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#NewISO8601)
+-   [ToUnix](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#ToUnix)
+-   [ToFormat](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#ToFormat)
+-   [ToFormatForTpl](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#ToFormatForTpl)
+-   [ToIso8601](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#ToIso8601)

-### 6. datastructure包含一些普通的数据结构实现。例如：list, linklist, stack, queue, set, tree, graph.
-
+### 7. datastructure 包含一些普通的数据结构实现。例如：list, linklist, stack, queue, set, tree, graph.

 ```go
 import list "github.com/duke-git/lancet/v2/datastructure/list"
@@ -216,18 +245,21 @@ import queue "github.com/duke-git/lancet/v2/datastructure/queue"
 import set "github.com/duke-git/lancet/v2/datastructure/set"
 import tree "github.com/duke-git/lancet/v2/datastructure/tree"
 import heap "github.com/duke-git/lancet/v2/datastructure/heap"
+import hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
 ```
+
 #### Function list:
- [List](https://github.com/duke-git/lancet/blob/main/docs/datastructure/list_zh-CN.md)
- [Linklist](https://github.com/duke-git/lancet/blob/main/docs/datastructure/linklist_zh-CN.md)
- [Stack](https://github.com/duke-git/lancet/blob/main/docs/datastructure/stack_zh-CN.md)
- [Queue](https://github.com/duke-git/lancet/blob/main/docs/datastructure/queue_zh-CN.md)
- [Set](https://github.com/duke-git/lancet/blob/main/docs/datastructure/set_zh-CN.md)
- [Tree](https://github.com/duke-git/lancet/blob/main/docs/datastructure/tree_zh-CN.md)
- [Heap](https://github.com/duke-git/lancet/blob/main/docs/datastructure/heap.md)

+-   [List](https://github.com/duke-git/lancet/blob/main/docs/datastructure/list_zh-CN.md)
+-   [Linklist](https://github.com/duke-git/lancet/blob/main/docs/datastructure/linklist_zh-CN.md)
+-   [Stack](https://github.com/duke-git/lancet/blob/main/docs/datastructure/stack_zh-CN.md)
+-   [Queue](https://github.com/duke-git/lancet/blob/main/docs/datastructure/queue_zh-CN.md)
+-   [Set](https://github.com/duke-git/lancet/blob/main/docs/datastructure/set_zh-CN.md)
+-   [Tree](https://github.com/duke-git/lancet/blob/main/docs/datastructure/tree_zh-CN.md)
+-   [Heap](https://github.com/duke-git/lancet/blob/main/docs/datastructure/heap.md)
+-   [HashMap](https://github.com/duke-git/lancet/blob/main/docs/datastructure/hashmap.md)

-### 7. fileutil包支持文件基本操作。
+### 8. fileutil 包支持文件基本操作。

 ```go
 import "github.com/duke-git/lancet/v2/fileutil"
@@ -235,183 +267,208 @@ import "github.com/duke-git/lancet/v2/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)
- [IsExist](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#IsExist)
- [IsLink](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#IsLink)
- [IsDir](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#IsDir)
- [ListFileNames](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#ListFileNames)
- [RemoveFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#RemoveFile)
- [ReadFileToString](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#ReadFileToString)
- [ReadFileByLine](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#ReadFileByLine)
- [Zip](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#Zip)
- [UnZip](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#UnZip)
+-   [ClearFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#ClearFile)
+-   [CreateFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#CreateFile)
+-   [CreateDir](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#CreateDir)
+-   [CopyFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#CopyFile)
+-   [FileMode](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#FileMode)
+-   [MiMeType](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#MiMeType)
+-   [IsExist](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#IsExist)
+-   [IsLink](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#IsLink)
+-   [IsDir](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#IsDir)
+-   [ListFileNames](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#ListFileNames)
+-   [RemoveFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#RemoveFile)
+-   [ReadFileToString](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#ReadFileToString)
+-   [ReadFileByLine](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#ReadFileByLine)
+-   [Zip](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#Zip)
+-   [UnZip](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#UnZip)

-### 8. formatter格式化器包含一些数据格式化处理方法。
+### 9. 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"
 ```
+
 #### 函数列表:
- [Comma](https://github.com/duke-git/lancet/blob/main/docs/formatter_zh-CN.md#Comma)

+-   [Comma](https://github.com/duke-git/lancet/blob/main/docs/formatter_zh-CN.md#Comma)

-### 9. function函数包控制函数执行流程，包含部分函数式编程。
+### 10. function 函数包控制函数执行流程，包含部分函数式编程。

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

 #### 函数列表:
- [After](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#After)
- [Before](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Before)
- [Curry](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Curry)
- [Compose](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Compose)
- [Debounced](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Debounced)
- [Delay](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Delay)
- [Watcher](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Watcher)

+-   [After](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#After)
+-   [Before](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Before)
+-   [Curry](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Curry)
+-   [Compose](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Compose)
+-   [Debounced](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Debounced)
+-   [Delay](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Delay)
+-   [Pipeline](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Pipeline)
+-   [Watcher](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Watcher)

-### 10. maputil包包括一些操作map的函数.
+### 11. maputil 包包括一些操作 map 的函数.

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

 #### 函数列表:
- [ForEach](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#ForEach)
- [Filter](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#Filter)
- [Intersect](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#Intersect)
- [Keys](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#Keys)
- [Merge](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#Merge)
- [Minus](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#Minus)
- [Values](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#Values)
- [IsDisjoint](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#IsDisjoint)

-### 11. mathutil包实现了一些数学计算的函数。
+-   [ForEach](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#ForEach)
+-   [Filter](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#Filter)
+-   [Intersect](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#Intersect)
+-   [Keys](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#Keys)
+-   [Merge](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#Merge)
+-   [Minus](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#Minus)
+-   [Values](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#Values)
+-   [IsDisjoint](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#IsDisjoint)
+
+### 12. mathutil 包实现了一些数学计算的函数。

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

 #### Function list:
- [Average](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Average)
- [Exponent](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Exponent)
- [Fibonacci](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Fibonacci)
- [Factorial](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Factorial)
- [Max](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Max)
- [MaxBy](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#MaxBy)
- [Min](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Min)
- [MinBy](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#MinBy)
- [Percent](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Percent)
- [RoundToFloat](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#RoundToFloat)
- [RoundToString](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#RoundToString)
- [TruncRound](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#TruncRound)

-### 12. netutil网络包支持获取ip地址，发送http请求。
+-   [Average](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Average)
+-   [Exponent](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Exponent)
+-   [Fibonacci](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Fibonacci)
+-   [Factorial](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Factorial)
+-   [Max](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Max)
+-   [MaxBy](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#MaxBy)
+-   [Min](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Min)
+-   [MinBy](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#MinBy)
+-   [Percent](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Percent)
+-   [RoundToFloat](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#RoundToFloat)
+-   [RoundToString](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#RoundToString)
+-   [TruncRound](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#TruncRound)
+
+### 13. 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"
 ```

 #### 函数列表:
- [ConvertMapToQueryString](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#ConvertMapToQueryString)
- [GetInternalIp](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#GetInternalIp)
- [EncodeUrl](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#EncodeUrl)
- [GetIps](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetIps)
- [GetMacAddrs](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetMacAddrs)
- [GetPublicIpInfo](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#GetPublicIpInfo)
- [GetRequestPublicIp](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#GetRequestPublicIp)
- [IsPublicIP](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#IsPublicIP)
- [IsInternalIP](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#IsInternalIP)
- [HttpGet](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpGet)
- [HttpDelete](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpDelete)
- [HttpPost](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpPost)
- [HttpPut](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpPut)
- [HttpPatch](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpPatch)
- [ParseHttpResponse](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#ParseHttpResponse)

-### 13. random随机数生成器包，可以生成随机[]bytes, int, string。
+-   [ConvertMapToQueryString](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#ConvertMapToQueryString)
+-   [GetInternalIp](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#GetInternalIp)
+-   [EncodeUrl](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#EncodeUrl)
+-   [GetIps](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetIps)
+-   [GetMacAddrs](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetMacAddrs)
+-   [GetPublicIpInfo](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#GetPublicIpInfo)
+-   [GetRequestPublicIp](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#GetRequestPublicIp)
+-   [IsPublicIP](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#IsPublicIP)
+-   [IsInternalIP](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#IsInternalIP)
+-   [HttpRequest](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpRequest)
+-   [HttpClient](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpClient)
+-   [SendRequest](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#SendRequest)
+-   [DecodeResponse](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#DecodeResponse)
+-   [StructToUrlValues](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#StructToUrlValues)
+-   [HttpGet<sup>deprecated</sup>](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpGet)
+-   [HttpDelete<sup>deprecated</sup>](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpDelete)
+-   [HttpPost<sup>deprecated</sup>](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpPost)
+-   [HttpPut<sup>deprecated</sup>](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpPut)
+-   [HttpPatch<sup>deprecated</sup>](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)
+
+### 14. random 随机数生成器包，可以生成随机[]bytes, int, string。

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

 #### 函数列表:
- [RandBytes](https://github.com/duke-git/lancet/blob/main/docs/random_zh-CN.md#RandBytes)
- [RandInt](https://github.com/duke-git/lancet/blob/main/docs/random_zh-CN.md#RandInt)
- [RandString](https://github.com/duke-git/lancet/blob/main/docs/random_zh-CN.md#RandString)
- [UUIdV4](https://github.com/duke-git/lancet/blob/main/docs/random.md#UUIdV4)
-### 14. retry重试执行函数直到函数运行成功或被context cancel。
+
+-   [RandBytes](https://github.com/duke-git/lancet/blob/main/docs/random_zh-CN.md#RandBytes)
+-   [RandInt](https://github.com/duke-git/lancet/blob/main/docs/random_zh-CN.md#RandInt)
+-   [RandString](https://github.com/duke-git/lancet/blob/main/docs/random_zh-CN.md#RandString)
+-   [RandUpper](https://github.com/duke-git/lancet/blob/main/docs/random_zh-CN.md#RandUpper)
+-   [RandLower](https://github.com/duke-git/lancet/blob/main/docs/random_zh-CN.md#RandLower)
+-   [RandNumeral](https://github.com/duke-git/lancet/blob/main/docs/random_zh-CN.md#RandNumeral)
+-   [RandNumeralOrLetter](https://github.com/duke-git/lancet/blob/main/docs/random_zh-CN.md#RandNumeralOrLetter)
+-   [UUIdV4](https://github.com/duke-git/lancet/blob/main/docs/random.md#UUIdV4)
+
+### 15. retry 重试执行函数直到函数运行成功或被 context cancel。

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

 #### 函数列表:
- [Context](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#Context)
- [Retry](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#Retry)
- [RetryFunc](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#RetryFunc)
- [RetryDuration](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#RetryDuration)
- [RetryTimes](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#RetryTimes)

+-   [Context](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#Context)
+-   [Retry](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#Retry)
+-   [RetryFunc](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#RetryFunc)
+-   [RetryDuration](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#RetryDuration)
+-   [RetryTimes](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#RetryTimes)

-### 15. slice包包含操作切片的方法集合。
+### 16. slice 包包含操作切片的方法集合。

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

 #### 函数列表:
- [AppendIfAbsent](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#AppendIfAbsent)
- [Contain](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Contain)
- [ContainSubSlice](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#ContainSubSlice)
- [Chunk](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Chunk)
- [Compact](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Compact)
- [Concat](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Concat)
- [Count](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Count)
- [Difference](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Difference)
- [DifferenceBy](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#DifferenceBy)
- [DifferenceWith](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DifferenceWith)
- [DeleteAt](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#DeleteAt)
- [Drop](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Drop)
- [Every](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Every)
- [Filter](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Filter)
- [Find](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Find)
- [FindLast](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#FindLast)
- [Flatten](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Flatten)
- [FlattenDeep](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#FlattenDeep)
- [ForEach](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#ForEach)
- [GroupBy](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#GroupBy)
- [GroupWith](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#GroupWith)
- [IntSlice](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#IntSlice)
- [InterfaceSlice](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#InterfaceSlice)
- [Intersection](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Intersection)
- [InsertAt](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#InsertAt)
- [IndexOf](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#IndexOf)
- [LastIndexOf](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#LastIndexOf)
- [Map](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Map)
- [Reverse](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Reverse)
- [Reduce](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Reduce)
- [Shuffle](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Shuffle)
- [SortByField](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#SortByField)
- [Some](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Some)
- [StringSlice](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#StringSlice)
- [SymmetricDifference](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#SymmetricDifference)
- [ToSlice](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#ToSlice)
- [ToSlicePointer](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#ToSlicePointer)
- [Unique](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Unique)
- [UniqueBy](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#UniqueBy)
- [Union](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Union)
- [UpdateAt](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#UpdateAt)
- [Without](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Without)

+-   [AppendIfAbsent](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#AppendIfAbsent)
+-   [Contain](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Contain)
+-   [ContainSubSlice](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#ContainSubSlice)
+-   [Chunk](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Chunk)
+-   [Compact](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Compact)
+-   [Concat](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Concat)
+-   [Count](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Count)
+-   [CountBy](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#CountBy)
+-   [Difference](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Difference)
+-   [DifferenceBy](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#DifferenceBy)
+-   [DifferenceWith](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DifferenceWith)
+-   [DeleteAt](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#DeleteAt)
+-   [Drop](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Drop)
+-   [Every](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Every)
+-   [Filter](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Filter)
+-   [Find](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Find)
+-   [FindLast](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#FindLast)
+-   [Flatten](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Flatten)
+-   [FlattenDeep](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#FlattenDeep)
+-   [ForEach](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#ForEach)
+-   [GroupBy](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#GroupBy)
+-   [GroupWith](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#GroupWith)
+-   [IntSlice<sup>deprecated</sup>](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#IntSlice)
+-   [InterfaceSlice<sup>deprecated</sup>](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#InterfaceSlice)
+-   [Intersection](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Intersection)
+-   [InsertAt](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#InsertAt)
+-   [IndexOf](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#IndexOf)
+-   [LastIndexOf](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#LastIndexOf)
+-   [Map](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Map)
+-   [Merge](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Merge)
+-   [Reverse](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Reverse)
+-   [Reduce](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Reduce)
+-   [Replace](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Replace)
+-   [ReplaceAll](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#ReplaceAll)
+-   [Repeat](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Repeat)
+-   [Shuffle](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Shuffle)
+-   [Sort](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Sort)
+-   [SortBy](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#SortBy)
+-   [SortByField<sup>deprecated</sup>](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<sup>deprecated</sup>](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#StringSlice)
+-   [SymmetricDifference](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#SymmetricDifference)
+-   [ToSlice](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#ToSlice)
+-   [ToSlicePointer](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#ToSlicePointer)
+-   [Unique](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Unique)
+-   [UniqueBy](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#UniqueBy)
+-   [Union](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Union)
+-   [UniqueBy](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#UniqueBy)
+-   [UpdateAt](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#UpdateAt)
+-   [Without](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Without)
+-   [KeyBy](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#KeyBy)

-### 16. strutil包含处理字符串的相关函数。
+### 17. strutil 包含处理字符串的相关函数。

 ```go
 import "github.com/duke-git/lancet/v2/strutil"
@@ -419,90 +476,97 @@ import "github.com/duke-git/lancet/v2/strutil"

 #### 函数列表:

- [After](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#After)
- [AfterLast](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#AfterLast)
- [Before](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#Before)
- [BeforeLast](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#BeforeLast)
- [CamelCase](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#CamelCase)
- [Capitalize](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#Capitalize)
- [IsString](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#IsString)
- [KebabCase](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#KebabCase)
- [LowerFirst](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#LowerFirst)
- [UpperFirst](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#UpperFirst)
- [PadEnd](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#PadEnd)
- [PadStart](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#PadStart)
- [Reverse](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#Reverse)
- [SnakeCase](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#SnakeCase)
- [SplitEx](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#SplitEx)
- [Wrap](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#Wrap)
- [Unwrap](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#Unwrap)
-  
+-   [After](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#After)
+-   [AfterLast](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#AfterLast)
+-   [Before](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#Before)
+-   [BeforeLast](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#BeforeLast)
+-   [CamelCase](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#CamelCase)
+-   [Capitalize](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#Capitalize)
+-   [IsString](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#IsString)
+-   [KebabCase](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#KebabCase)
+-   [UpperKebabCase](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#UpperKebabCase)
+-   [LowerFirst](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#LowerFirst)
+-   [UpperFirst](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#UpperFirst)
+-   [PadEnd](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#PadEnd)
+-   [PadStart](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#PadStart)
+-   [Reverse](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#Reverse)
+-   [SnakeCase](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#SnakeCase)
+-   [UpperSnakeCase](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#UpperSnakeCase)
+-   [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)

-### 17. system包含os, runtime, shell command相关函数。
+### 18. system 包含 os, runtime, shell command 相关函数。

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

 #### 函数列表:
- [IsWindows](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#IsWindows)
- [IsLinux](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#IsLinux)
- [IsMac](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#IsMac)
- [GetOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#GetOsEnv)
- [SetOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#SetOsEnv)
- [RemoveOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#RemoveOsEnv)
- [CompareOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#CompareOsEnv)
- [ExecCommand](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#ExecCommand)
- [GetOsBits](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#GetOsBits)

-### 18. validator验证器包，包含常用字符串格式验证函数。
+-   [IsWindows](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#IsWindows)
+-   [IsLinux](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#IsLinux)
+-   [IsMac](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#IsMac)
+-   [GetOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#GetOsEnv)
+-   [SetOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#SetOsEnv)
+-   [RemoveOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#RemoveOsEnv)
+-   [CompareOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#CompareOsEnv)
+-   [ExecCommand](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#ExecCommand)
+-   [GetOsBits](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#GetOsBits)
+
+### 19. 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"
 ```
+
 #### 函数列表:

- [ContainChinese](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#ContainChinese)
- [ContainLetter](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#ContainLetter)
- [ContainLower](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#ContainLower)
- [ContainUpper](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#ContainUpper)
- [IsAlpha](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsAlpha)
- [IsAllUpper](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsAllUpper)
- [IsAllLower](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsAllLower)
- [IsBase64](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsBase64)
- [IsChineseMobile](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsChineseMobile)
- [IsChineseIdNum](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsChineseIdNum)
- [IsChinesePhone](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsChinesePhone)
- [IsCreditCard](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsCreditCard)
- [IsDns](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsDns)
- [IsEmail](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsEmail)
- [IsEmptyString](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsEmptyString)
- [IsFloatStr](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsFloatStr)
- [IsNumberStr](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsNumberStr)
- [IsJSON](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsJSON)
- [IsRegexMatch](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsRegexMatch)
- [IsIntStr](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsIntStr)
- [IsIp](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsIp)
- [IsIpV4](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsIpV4)
- [IsIpV6](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsIpV6)
- [IsStrongPassword](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsStrongPassword)
- [IsUrl](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsUrl)
- [IsWeakPassword](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsWeakPassword)
+-   [ContainChinese](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#ContainChinese)
+-   [ContainLetter](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#ContainLetter)
+-   [ContainLower](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#ContainLower)
+-   [ContainUpper](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#ContainUpper)
+-   [IsAlpha](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsAlpha)
+-   [IsAllUpper](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsAllUpper)
+-   [IsAllLower](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsAllLower)
+-   [IsBase64](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsBase64)
+-   [IsChineseMobile](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsChineseMobile)
+-   [IsChineseIdNum](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsChineseIdNum)
+-   [IsChinesePhone](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsChinesePhone)
+-   [IsCreditCard](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsCreditCard)
+-   [IsDns](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsDns)
+-   [IsEmail](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsEmail)
+-   [IsEmptyString](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsEmptyString)
+-   [IsFloatStr](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsFloatStr)
+-   [IsNumberStr](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsNumberStr)
+-   [IsJSON](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsJSON)
+-   [IsRegexMatch](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsRegexMatch)
+-   [IsIntStr](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsIntStr)
+-   [IsIp](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsIp)
+-   [IsIpV4](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsIpV4)
+-   [IsIpV6](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsIpV6)
+-   [IsStrongPassword](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsStrongPassword)
+-   [IsUrl](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsUrl)
+-   [IsWeakPassword](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsWeakPassword)
+-   [IsZeroValue](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsZeroValue)
+-   [IsGBK](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsGBK)

-### 19. xerror包实现一些错误处理函数
+### 20. 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)
+
+-   [Unwrap](https://github.com/duke-git/lancet/blob/main/docs/xerror_zh-CN.md#Unwrap)

 ## 如何贡献代码

-非常感激任何的代码提交以使lancet的功能越来越强大。创建pull request时请遵守以下规则。
+非常感激任何的代码提交以使 lancet 的功能越来越强大。创建 pull request 时请遵守以下规则。

-1. Fork lancet仓库。
+1. Fork lancet 仓库。
 2. 创建自己的特性分支。
 3. 提交变更。
-4. Push分支。
-5. 创建新的pull request。
+4. Push 分支。
+5. 创建新的 pull request。
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -0,0 +1,15 @@
+# Security Policy
+
+## Supported Versions
+Here is the lancet version and compatibility with go language version.
+
+| Version | Supported         |
+| ------- | ------------------|
+| 2.x.x   | +go v1.18         |
+| 1.x.x   | +go v1.12         |
+
+
+## Reporting a Vulnerability
+
+For now, there is no public website to report a vulnerability, If you find security issue in lancet, you can send it to me via my email `lanliddd.2007@163.com`.
+we can discuss it. I am appreciate if someone can create a public page for reporting vulnerability.
--- a/concurrency/channel.go
+++ b/concurrency/channel.go
@@ -158,7 +158,7 @@ func (c *Channel) Bridge(ctx context.Context, chanStream <-chan <-chan any) <-ch
 			var stream <-chan any
 			select {
 			case maybeStream, ok := <-chanStream:
-				if ok == false {
+				if !ok {
 					return
 				}
 				stream = maybeStream
--- a/condition/condition.go
+++ b/condition/condition.go
@@ -0,0 +1,77 @@
+// Copyright 2021 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package condition contains some functions for conditional judgment. eg. And, Or, TernaryOperator ...
+// The implementation of this package refers to the implementation of carlmjohnson's truthy package, you may find more
+// useful information in truthy(https://github.com/carlmjohnson/truthy), thanks carlmjohnson.
+package condition
+
+import "reflect"
+
+// Bool returns the truthy value of anything.
+// If the value's type has a Bool() bool method, the method is called and returned.
+// If the type has an IsZero() bool method, the opposite value is returned.
+// Slices and maps are truthy if they have a length greater than zero.
+// All other types are truthy if they are not their zero value.
+func Bool[T any](value T) bool {
+	switch m := any(value).(type) {
+	case interface{ Bool() bool }:
+		return m.Bool()
+	case interface{ IsZero() bool }:
+		return !m.IsZero()
+	}
+	return reflectValue(&value)
+}
+
+func reflectValue(vp any) bool {
+	switch rv := reflect.ValueOf(vp).Elem(); rv.Kind() {
+	case reflect.Map, reflect.Slice:
+		return rv.Len() != 0
+	default:
+		is := rv.IsZero()
+		return !is
+	}
+}
+
+// And returns true if both a and b are truthy.
+func And[T, U any](a T, b U) bool {
+	return Bool(a) && Bool(b)
+}
+
+// Or returns false iff neither a nor b is truthy.
+func Or[T, U any](a T, b U) bool {
+	return Bool(a) || Bool(b)
+}
+
+// Xor returns true iff a or b but not both is truthy.
+func Xor[T, U any](a T, b U) bool {
+	valA := Bool(a)
+	valB := Bool(b)
+	return (valA || valB) && valA != valB
+}
+
+// Nor returns true iff neither a nor b is truthy.
+func Nor[T, U any](a T, b U) bool {
+	return !(Bool(a) || Bool(b))
+}
+
+// Xnor returns true iff both a and b or neither a nor b are truthy.
+func Xnor[T, U any](a T, b U) bool {
+	valA := Bool(a)
+	valB := Bool(b)
+	return (valA && valB) || (!valA && !valB)
+}
+
+// Nand returns false iff both a and b are truthy.
+func Nand[T, U any](a T, b U) bool {
+	return !Bool(a) || !Bool(b)
+}
+
+// TernaryOperator checks the value of param `isTrue`, if true return ifValue else return elseValue
+func TernaryOperator[T, U any](isTrue T, ifValue U, elseValue U) U {
+	if Bool(isTrue) {
+		return ifValue
+	} else {
+		return elseValue
+	}
+}
--- a/condition/condition_test.go
+++ b/condition/condition_test.go
@@ -0,0 +1,119 @@
+package condition
+
+import (
+	"errors"
+	"testing"
+	"time"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+type TestStruct struct{}
+
+func TestBool(t *testing.T) {
+	assert := internal.NewAssert(t, "TestBool")
+
+	// bool
+	assert.Equal(false, Bool(false))
+	assert.Equal(true, Bool(true))
+
+	// integer
+	assert.Equal(false, Bool(0))
+	assert.Equal(true, Bool(1))
+
+	// float
+	assert.Equal(false, Bool(0.0))
+	assert.Equal(true, Bool(0.1))
+
+	// string
+	assert.Equal(false, Bool(""))
+	assert.Equal(true, Bool(" "))
+	assert.Equal(true, Bool("0"))
+
+	// slice
+	var nums [2]int
+	assert.Equal(false, Bool(nums))
+	nums = [2]int{0, 1}
+	assert.Equal(true, Bool(nums))
+
+	// map
+	assert.Equal(false, Bool(map[string]string{}))
+	assert.Equal(true, Bool(map[string]string{"a": "a"}))
+
+	// channel
+	var ch chan int
+	assert.Equal(false, Bool(ch))
+	ch = make(chan int)
+	assert.Equal(true, Bool(ch))
+
+	//  interface
+	var err error
+	assert.Equal(false, Bool(err))
+	err = errors.New("error message")
+	assert.Equal(true, Bool(err))
+
+	// struct
+	assert.Equal(false, Bool(struct{}{}))
+	assert.Equal(true, Bool(time.Now()))
+
+	// struct pointer
+	ts := TestStruct{}
+	assert.Equal(false, Bool(ts))
+	assert.Equal(true, Bool(&ts))
+}
+
+func TestAnd(t *testing.T) {
+	assert := internal.NewAssert(t, "TestAnd")
+	assert.Equal(false, And(0, 1))
+	assert.Equal(false, And(0, ""))
+	assert.Equal(false, And(0, "0"))
+	assert.Equal(true, And(1, "0"))
+}
+
+func TestOr(t *testing.T) {
+	assert := internal.NewAssert(t, "TestOr")
+	assert.Equal(false, Or(0, ""))
+	assert.Equal(true, Or(0, 1))
+	assert.Equal(true, Or(0, "0"))
+	assert.Equal(true, Or(1, "0"))
+}
+
+func TestXor(t *testing.T) {
+	assert := internal.NewAssert(t, "TestOr")
+	assert.Equal(false, Xor(0, 0))
+	assert.Equal(true, Xor(0, 1))
+	assert.Equal(true, Xor(1, 0))
+	assert.Equal(false, Xor(1, 1))
+}
+
+func TestNor(t *testing.T) {
+	assert := internal.NewAssert(t, "TestNor")
+	assert.Equal(true, Nor(0, 0))
+	assert.Equal(false, Nor(0, 1))
+	assert.Equal(false, Nor(1, 0))
+	assert.Equal(false, Nor(1, 1))
+}
+
+func TestXnor(t *testing.T) {
+	assert := internal.NewAssert(t, "TestXnor")
+	assert.Equal(true, Xnor(0, 0))
+	assert.Equal(false, Xnor(0, 1))
+	assert.Equal(false, Xnor(1, 0))
+	assert.Equal(true, Xnor(1, 1))
+}
+
+func TestNand(t *testing.T) {
+	assert := internal.NewAssert(t, "TestNand")
+	assert.Equal(true, Nand(0, 0))
+	assert.Equal(true, Nand(0, 1))
+	assert.Equal(true, Nand(1, 0))
+	assert.Equal(false, Nand(1, 1))
+}
+
+func TestTernaryOperator(t *testing.T) {
+	assert := internal.NewAssert(t, "TernaryOperator")
+	trueValue := "1"
+	falseValue := "0"
+
+	assert.Equal(trueValue, TernaryOperator(true, trueValue, falseValue))
+}
--- a/convertor/convertor.go
+++ b/convertor/convertor.go
@@ -7,6 +7,7 @@ package convertor
 import (
 	"bytes"
 	"encoding/binary"
+	"encoding/gob"
 	"encoding/json"
 	"fmt"
 	"math"
@@ -89,34 +90,53 @@ func ToChannel[T any](array []T) <-chan T {
 }

 // ToString convert value to string
+// for number, string, []byte, will convert to string
+// for other type (slice, map, array, struct) will call json.Marshal
 func ToString(value any) string {
-	result := ""
 	if value == nil {
-		return result
+		return ""
 	}

-	v := reflect.ValueOf(value)
-
-	switch value.(type) {
-	case float32, float64:
-		result = strconv.FormatFloat(v.Float(), 'f', -1, 64)
-		return result
-	case int, int8, int16, int32, int64:
-		result = strconv.FormatInt(v.Int(), 10)
-		return result
-	case uint, uint8, uint16, uint32, uint64:
-		result = strconv.FormatUint(v.Uint(), 10)
-		return result
+	switch val := value.(type) {
+	case float32:
+		return strconv.FormatFloat(float64(val), 'f', -1, 32)
+	case float64:
+		return strconv.FormatFloat(val, 'f', -1, 64)
+	case int:
+		return strconv.FormatInt(int64(val), 10)
+	case int8:
+		return strconv.FormatInt(int64(val), 10)
+	case int16:
+		return strconv.FormatInt(int64(val), 10)
+	case int32:
+		return strconv.FormatInt(int64(val), 10)
+	case int64:
+		return strconv.FormatInt(val, 10)
+	case uint:
+		return strconv.FormatUint(uint64(val), 10)
+	case uint8:
+		return strconv.FormatUint(uint64(val), 10)
+	case uint16:
+		return strconv.FormatUint(uint64(val), 10)
+	case uint32:
+		return strconv.FormatUint(uint64(val), 10)
+	case uint64:
+		return strconv.FormatUint(val, 10)
 	case string:
-		result = v.String()
-		return result
+		return val
 	case []byte:
-		result = string(v.Bytes())
-		return result
+		return string(val)
 	default:
-		newValue, _ := json.Marshal(value)
-		result = string(newValue)
-		return result
+		b, err := json.Marshal(val)
+		if err != nil {
+			return ""
+		}
+		return string(b)
+
+		// todo: maybe we should't supprt other type conversion
+		// v := reflect.ValueOf(value)
+		// log.Panicf("Unsupported data type: %s ", v.String())
+		// return ""
 	}
 }

@@ -270,3 +290,21 @@ func ColorRGBToHex(red, green, blue int) string {

 	return "#" + r + g + b
 }
+
+// EncodeByte encode data to byte
+func EncodeByte(data any) ([]byte, error) {
+	buffer := bytes.NewBuffer(nil)
+	encoder := gob.NewEncoder(buffer)
+	err := encoder.Encode(data)
+	if err != nil {
+		return nil, err
+	}
+	return buffer.Bytes(), nil
+}
+
+// DecodeByte decode byte data to target object
+func DecodeByte(data []byte, target any) error {
+	buffer := bytes.NewBuffer(data)
+	decoder := gob.NewDecoder(buffer)
+	return decoder.Decode(target)
+}
--- a/convertor/convertor_test.go
+++ b/convertor/convertor_test.go
@@ -27,14 +27,9 @@ func TestToChannel(t *testing.T) {
 	assert := internal.NewAssert(t, "TestToChannel")

 	ch := ToChannel([]int{1, 2, 3})
-	val1, _ := <-ch
-	assert.Equal(1, val1)
-
-	val2, _ := <-ch
-	assert.Equal(2, val2)
-
-	val3, _ := <-ch
-	assert.Equal(3, val3)
+	assert.Equal(1, <-ch)
+	assert.Equal(2, <-ch)
+	assert.Equal(3, <-ch)

 	_, ok := <-ch
 	assert.Equal(false, ok)
@@ -137,9 +132,10 @@ func TestToString(t *testing.T) {
 		"", "",
 		"0", "1", "-1",
 		"123", "123", "123", "123", "123", "123", "123",
-		"12.3", "12.300000190734863",
+		"12.3", "12.3",
 		"true", "false",
-		"[1,2,3]", "{\"a\":1,\"b\":2,\"c\":3}", "{\"Name\":\"TestStruct\"}", "hello"}
+		"[1,2,3]", "{\"a\":1,\"b\":2,\"c\":3}", "{\"Name\":\"TestStruct\"}", "hello",
+	}

 	for i := 0; i < len(cases); i++ {
 		actual := ToString(cases[i])
@@ -238,3 +234,22 @@ func TestToPointer(t *testing.T) {

 	assert.Equal(*result, 123)
 }
+
+func TestEncodeByte(t *testing.T) {
+	assert := internal.NewAssert(t, "TestEncodeByte")
+
+	byteData, _ := EncodeByte("abc")
+	expected := []byte{6, 12, 0, 3, 97, 98, 99}
+
+	assert.Equal(expected, byteData)
+}
+
+func TestDecodeByte(t *testing.T) {
+	assert := internal.NewAssert(t, "TestDecodeByte")
+
+	var obj string
+	byteData := []byte{6, 12, 0, 3, 97, 98, 99}
+	err := DecodeByte(byteData, &obj)
+	assert.IsNil(err)
+	assert.Equal("abc", obj)
+}
--- a/cryptor/aes.go
+++ b/cryptor/aes.go
@@ -17,15 +17,19 @@ import (
 // AesEcbEncrypt encrypt data with key use AES ECB algorithm
 // len(key) should be 16, 24 or 32
 func AesEcbEncrypt(data, key []byte) []byte {
-	cipher, _ := aes.NewCipher(generateAesKey(key))
 	length := (len(data) + aes.BlockSize) / aes.BlockSize
 	plain := make([]byte, length*aes.BlockSize)
+
 	copy(plain, data)
+
 	pad := byte(len(plain) - len(data))
 	for i := len(data); i < len(plain); i++ {
 		plain[i] = pad
 	}
+
 	encrypted := make([]byte, len(plain))
+	cipher, _ := aes.NewCipher(generateAesKey(key))
+
 	for bs, be := 0, cipher.BlockSize(); bs <= len(data); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
 		cipher.Encrypt(encrypted[bs:be], plain[bs:be])
 	}
@@ -108,27 +112,32 @@ func AesCfbEncrypt(data, key []byte) []byte {

 	encrypted := make([]byte, aes.BlockSize+len(data))
 	iv := encrypted[:aes.BlockSize]
+
 	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
 		panic(err)
 	}

 	stream := cipher.NewCFBEncrypter(block, iv)
 	stream.XORKeyStream(encrypted[aes.BlockSize:], data)
+
 	return encrypted
 }

 // AesCfbDecrypt decrypt data with key use AES CFB algorithm
 // len(encrypted) should be great than 16, len(key) should be 16, 24 or 32
 func AesCfbDecrypt(encrypted, key []byte) []byte {
-	block, _ := aes.NewCipher(key)
 	if len(encrypted) < aes.BlockSize {
 		panic("encrypted data is too short")
 	}
+
+	block, _ := aes.NewCipher(key)
 	iv := encrypted[:aes.BlockSize]
 	encrypted = encrypted[aes.BlockSize:]

 	stream := cipher.NewCFBDecrypter(block, iv)
+
 	stream.XORKeyStream(encrypted, encrypted)
+
 	return encrypted
 }

@@ -139,6 +148,7 @@ func AesOfbEncrypt(data, key []byte) []byte {
 	if err != nil {
 		panic(err)
 	}
+
 	data = pkcs7Padding(data, aes.BlockSize)
 	encrypted := make([]byte, aes.BlockSize+len(data))
 	iv := encrypted[:aes.BlockSize]
@@ -148,6 +158,7 @@ func AesOfbEncrypt(data, key []byte) []byte {

 	stream := cipher.NewOFB(block, iv)
 	stream.XORKeyStream(encrypted[aes.BlockSize:], data)
+
 	return encrypted
 }

@@ -170,5 +181,6 @@ func AesOfbDecrypt(data, key []byte) []byte {
 	mode.XORKeyStream(decrypted, data)

 	decrypted = pkcs7UnPadding(decrypted)
+
 	return decrypted
 }
--- a/cryptor/des.go
+++ b/cryptor/des.go
@@ -15,7 +15,6 @@ import (
 // DesEcbEncrypt encrypt data with key use DES ECB algorithm
 // len(key) should be 8
 func DesEcbEncrypt(data, key []byte) []byte {
-	cipher, _ := des.NewCipher(generateDesKey(key))
 	length := (len(data) + des.BlockSize) / des.BlockSize
 	plain := make([]byte, length*des.BlockSize)
 	copy(plain, data)
@@ -26,6 +25,8 @@ func DesEcbEncrypt(data, key []byte) []byte {
 	}

 	encrypted := make([]byte, len(plain))
+	cipher, _ := des.NewCipher(generateDesKey(key))
+
 	for bs, be := 0, cipher.BlockSize(); bs <= len(data); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
 		cipher.Encrypt(encrypted[bs:be], plain[bs:be])
 	}
@@ -59,6 +60,7 @@ func DesCbcEncrypt(data, key []byte) []byte {

 	encrypted := make([]byte, des.BlockSize+len(data))
 	iv := encrypted[:des.BlockSize]
+
 	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
 		panic(err)
 	}
--- a/cryptor/rsa.go
+++ b/cryptor/rsa.go
@@ -33,7 +33,11 @@ func GenerateRsaKey(keySize int, priKeyFile, pubKeyFile string) error {
 	if err != nil {
 		panic(err)
 	}
-	pem.Encode(file, &block)
+	err = pem.Encode(file, &block)
+	if err != nil {
+		return err
+	}
+
 	file.Close()

 	// public key
@@ -49,12 +53,16 @@ func GenerateRsaKey(keySize int, priKeyFile, pubKeyFile string) error {
 		Bytes: derpText,
 	}

-	//file,err = os.Create("rsa_public.pem")
 	file, err = os.Create(pubKeyFile)
 	if err != nil {
 		return err
 	}
-	pem.Encode(file, &block)
+
+	err = pem.Encode(file, &block)
+	if err != nil {
+		return err
+	}
+
 	file.Close()

 	return nil
@@ -72,7 +80,11 @@ func RsaEncrypt(data []byte, pubKeyFileName string) []byte {
 	}
 	defer file.Close()
 	buf := make([]byte, fileInfo.Size())
-	file.Read(buf)
+
+	_, err = file.Read(buf)
+	if err != nil {
+		panic(err)
+	}

 	block, _ := pem.Decode(buf)

@@ -101,7 +113,11 @@ func RsaDecrypt(data []byte, privateKeyFileName string) []byte {
 	}
 	buf := make([]byte, fileInfo.Size())
 	defer file.Close()
-	file.Read(buf)
+
+	_, err = file.Read(buf)
+	if err != nil {
+		panic(err)
+	}

 	block, _ := pem.Decode(buf)

--- a/datastructure/hashmap/hashmap.go
+++ b/datastructure/hashmap/hashmap.go
@@ -93,11 +93,53 @@ func (hm *HashMap) Contains(key any) bool {
 	return node != nil
 }

+// Iterate executes iteratee funcation for every key and value pair of hashmap (random order)
+func (hm *HashMap) Iterate(iteratee func(key, value any)) {
+	if hm.size > 0 {
+		for i := 0; i < len(hm.table); i++ {
+			item := hm.table[i]
+			if item != nil {
+				iteratee(item.key, item.value)
+			}
+		}
+	}
+}
+
+// Keys returns a slice of the hashmap's keys (random order)
+func (hm *HashMap) Keys() []any {
+	keys := make([]any, int(hm.size))
+	index := 0
+	if hm.size > 0 {
+		hm.Iterate(func(key, value any) {
+			keys[index] = key
+			index++
+		})
+	}
+
+	return keys
+}
+
+// Values returns a slice of the hashmap's keys (random order)
+func (hm *HashMap) Values() []any {
+	values := make([]any, int(hm.size))
+	index := 0
+	if hm.size > 0 {
+		hm.Iterate(func(key, value any) {
+			values[index] = value
+			index++
+		})
+	}
+
+	return values
+}
+
 func (hm *HashMap) resize() {
 	hm.capacity <<= 1

 	tempTable := hm.table

+	hm.table = make([]*mapNode, hm.capacity)
+
 	for i := 0; i < len(tempTable); i++ {
 		node := tempTable[i]
 		if node == nil {
--- a/datastructure/hashmap/hashmap_test.go
+++ b/datastructure/hashmap/hashmap_test.go
@@ -19,6 +19,18 @@ func TestHashMap_PutAndGet(t *testing.T) {
 	assert.Equal(4, hm.Get("abc"))
 }

+func TestHashMap_Resize(t *testing.T) {
+	assert := internal.NewAssert(t, "TestHashMap_Resize")
+
+	hm := NewHashMapWithCapacity(3, 3)
+
+	for i := 0; i < 20; i++ {
+		hm.Put(i, 10)
+	}
+
+	assert.Equal(10, hm.Get(5))
+}
+
 func TestHashMap_Delete(t *testing.T) {
 	assert := internal.NewAssert(t, "TestHashMap_Delete")

@@ -40,3 +52,20 @@ func TestHashMap_Contains(t *testing.T) {
 	hm.Put("abc", 3)
 	assert.Equal(true, hm.Contains("abc"))
 }
+
+func TestHashMap_KeysValues(t *testing.T) {
+	assert := internal.NewAssert(t, "TestHashMap_KeysValues")
+
+	hm := NewHashMap()
+
+	hm.Put("a", 1)
+	hm.Put("b", 2)
+	hm.Put("c", 3)
+
+	keys := hm.Keys()
+	values := hm.Values()
+	t.Log(keys, values)
+
+	assert.Equal(3, len(values))
+	assert.Equal(3, len(keys))
+}
--- a/datastructure/heap/maxheap.go
+++ b/datastructure/heap/maxheap.go
@@ -146,9 +146,9 @@ func (h *MaxHeap[T]) PrintStructure() {
 	lastNum := powerTwo(level - 1)
 	lastLen := lastNum + (lastNum - 1)

-	heapTree := make([][]string, level, level)
+	heapTree := make([][]string, level)
 	for i := 0; i < level; i++ {
-		heapTree[i] = make([]string, lastLen, lastLen)
+		heapTree[i] = make([]string, lastLen)
 		for j := 0; j < lastLen; j++ {
 			heapTree[i][j] = ""
 		}
@@ -169,9 +169,9 @@ func (h *MaxHeap[T]) PrintStructure() {
 		for n := 0; n < lastLen; n++ {
 			val := heapTree[m][n]
 			if val == "" {
-				fmt.Printf(" ")
+				fmt.Print(" ")
 			} else {
-				fmt.Printf(val)
+				fmt.Print(val)
 			}
 		}
 		fmt.Println()
--- a/datastructure/heap/maxheap_test.go
+++ b/datastructure/heap/maxheap_test.go
@@ -30,8 +30,6 @@ func TestMaxHeap_BuildMaxHeap(t *testing.T) {
 	assert.Equal(expected, heap.data)

 	assert.Equal(12, heap.Size())
-
-	heap.PrintStructure()
 }

 func TestMaxHeap_Push(t *testing.T) {
--- a/datastructure/link/doublylink.go
+++ b/datastructure/link/doublylink.go
@@ -1,13 +1,12 @@
 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.
+// DoublyLink is a linked list. Whose node has a generic Value, Pre pointer points to a previous node of the dl, Next pointer points to a next node of the dl.
 type DoublyLink[T any] struct {
 	Head   *datastructure.LinkNode[T]
 	length int
@@ -19,30 +18,30 @@ func NewDoublyLink[T any]() *DoublyLink[T] {
 }

 // InsertAtHead insert value into doubly linklist at head index
-func (link *DoublyLink[T]) InsertAtHead(value T) {
+func (dl *DoublyLink[T]) InsertAtHead(value T) {
 	newNode := datastructure.NewLinkNode(value)
-	size := link.Size()
+	size := dl.Size()

 	if size == 0 {
-		link.Head = newNode
-		link.length++
+		dl.Head = newNode
+		dl.length++
 		return
 	}

-	newNode.Next = link.Head
+	newNode.Next = dl.Head
 	newNode.Pre = nil

-	link.Head.Pre = newNode
-	link.Head = newNode
+	dl.Head.Pre = newNode
+	dl.Head = newNode

-	link.length++
+	dl.length++
 }

 // InsertAtTail insert value into doubly linklist at tail index
-func (link *DoublyLink[T]) InsertAtTail(value T) {
-	current := link.Head
+func (dl *DoublyLink[T]) InsertAtTail(value T) {
+	current := dl.Head
 	if current == nil {
-		link.InsertAtHead(value)
+		dl.InsertAtHead(value)
 		return
 	}

@@ -55,28 +54,29 @@ func (link *DoublyLink[T]) InsertAtTail(value T) {
 	newNode.Pre = current
 	current.Next = newNode

-	link.length++
+	dl.length++
 }

 // InsertAt insert value into doubly linklist at index
-func (link *DoublyLink[T]) InsertAt(index int, value T) error {
-	size := link.length
+// param `index` should between [0, length], if index do not meet the conditions, do nothing
+func (dl *DoublyLink[T]) InsertAt(index int, value T) {
+	size := dl.length
 	if index < 0 || index > size {
-		return errors.New("param index should between 0 and the length of doubly link.")
+		return
 	}

 	if index == 0 {
-		link.InsertAtHead(value)
-		return nil
+		dl.InsertAtHead(value)
+		return
 	}

 	if index == size {
-		link.InsertAtTail(value)
-		return nil
+		dl.InsertAtTail(value)
+		return
 	}

 	i := 0
-	current := link.Head
+	current := dl.Head

 	for current != nil {
 		if i == index-1 {
@@ -85,38 +85,36 @@ func (link *DoublyLink[T]) InsertAt(index int, value T) error {
 			newNode.Pre = current

 			current.Next = newNode
-			link.length++
+			dl.length++

-			return nil
+			return
 		}
 		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")
+func (dl *DoublyLink[T]) DeleteAtHead() {
+	if dl.Head == nil {
+		return
 	}
-	current := link.Head
-	link.Head = current.Next
-	link.Head.Pre = nil
-	link.length--

-	return nil
+	current := dl.Head
+	dl.Head = current.Next
+	dl.Head.Pre = nil
+	dl.length--
 }

-// 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")
+// DeleteAtTail delete value in doubly linklist at tail
+func (dl *DoublyLink[T]) DeleteAtTail() {
+	if dl.Head == nil {
+		return
 	}
-	current := link.Head
+
+	current := dl.Head
 	if current.Next == nil {
-		return link.DeleteAtHead()
+		dl.DeleteAtHead()
 	}

 	for current.Next.Next != nil {
@@ -124,45 +122,44 @@ func (link *DoublyLink[T]) DeleteAtTail() error {
 	}

 	current.Next = nil
-	link.length--
-	return nil
+	dl.length--
 }

 // 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")
+// param `index` should be [0, len(DoublyLink)-1]
+func (dl *DoublyLink[T]) DeleteAt(index int) {
+	if dl.Head == nil {
+		return
 	}
-	current := link.Head
+
+	current := dl.Head
 	if current.Next == nil || index == 0 {
-		return link.DeleteAtHead()
+		dl.DeleteAtHead()
 	}

-	if index == link.length-1 {
-		return link.DeleteAtTail()
+	if index == dl.length-1 {
+		dl.DeleteAtTail()
 	}

-	if index < 0 || index > link.length-1 {
-		return errors.New("param index should between 0 and link size -1.")
+	if index < 0 || index > dl.length-1 {
+		return
 	}

 	i := 0
 	for current != nil {
 		if i == index-1 {
 			current.Next = current.Next.Next
-			link.length--
-			return nil
+			dl.length--
+			return
 		}
 		i++
 		current = current.Next
 	}
-
-	return errors.New("delete error")
 }

 // Reverse the linked list
-func (link *DoublyLink[T]) Reverse() {
-	current := link.Head
+func (dl *DoublyLink[T]) Reverse() {
+	current := dl.Head
 	var temp *datastructure.LinkNode[T]

 	for current != nil {
@@ -173,20 +170,20 @@ func (link *DoublyLink[T]) Reverse() {
 	}

 	if temp != nil {
-		link.Head = temp.Pre
+		dl.Head = temp.Pre
 	}
 }

 // GetMiddleNode return node at middle index of linked list
-func (link *DoublyLink[T]) GetMiddleNode() *datastructure.LinkNode[T] {
-	if link.Head == nil {
+func (dl *DoublyLink[T]) GetMiddleNode() *datastructure.LinkNode[T] {
+	if dl.Head == nil {
 		return nil
 	}
-	if link.Head.Next == nil {
-		return link.Head
+	if dl.Head.Next == nil {
+		return dl.Head
 	}
-	fast := link.Head
-	slow := link.Head
+	fast := dl.Head
+	slow := dl.Head

 	for fast != nil {
 		fast = fast.Next
@@ -202,14 +199,14 @@ func (link *DoublyLink[T]) GetMiddleNode() *datastructure.LinkNode[T] {
 }

 // Size return the count of doubly linked list
-func (link *DoublyLink[T]) Size() int {
-	return link.length
+func (dl *DoublyLink[T]) Size() int {
+	return dl.length
 }

 // Values return slice of all doubly linklist node value
-func (link *DoublyLink[T]) Values() []T {
+func (dl *DoublyLink[T]) Values() []T {
 	result := []T{}
-	current := link.Head
+	current := dl.Head
 	for current != nil {
 		result = append(result, current.Value)
 		current = current.Next
@@ -218,8 +215,8 @@ func (link *DoublyLink[T]) Values() []T {
 }

 // Print all nodes info of a linked list
-func (link *DoublyLink[T]) Print() {
-	current := link.Head
+func (dl *DoublyLink[T]) Print() {
+	current := dl.Head
 	info := "[ "
 	for current != nil {
 		info += fmt.Sprintf("%+v, ", current)
@@ -229,13 +226,13 @@ func (link *DoublyLink[T]) Print() {
 	fmt.Println(info)
 }

-// IsEmpty checks if link is empty or not
-func (link *DoublyLink[T]) IsEmpty() bool {
-	return link.length == 0
+// IsEmpty checks if dl is empty or not
+func (dl *DoublyLink[T]) IsEmpty() bool {
+	return dl.length == 0
 }

 // Clear all nodes in doubly linklist
-func (link *DoublyLink[T]) Clear() {
-	link.Head = nil
-	link.length = 0
+func (dl *DoublyLink[T]) Clear() {
+	dl.Head = nil
+	dl.length = 0
 }
--- a/datastructure/link/doublylink_test.go
+++ b/datastructure/link/doublylink_test.go
@@ -41,29 +41,24 @@ func TestDoublyLink_InsertAt(t *testing.T) {

 	link := NewDoublyLink[int]()

-	err := link.InsertAt(1, 1)
-	assert.IsNotNil(err)
+	link.InsertAt(1, 1) //do nothing

 	link.InsertAt(0, 1)
 	link.InsertAt(1, 2)
 	link.InsertAt(2, 4)
 	link.InsertAt(2, 3)

-	link.Print()
-
 	expected := []int{1, 2, 3, 4}
 	values := link.Values()

 	assert.Equal(expected, values)
-
 }

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

 	link := NewDoublyLink[int]()
-	err := link.DeleteAtHead()
-	assert.IsNotNil(err)
+	link.DeleteAtHead()

 	link.InsertAtTail(1)
 	link.InsertAtTail(2)
@@ -71,7 +66,6 @@ func TestDoublyLink_DeleteAtHead(t *testing.T) {
 	link.InsertAtTail(4)

 	link.DeleteAtHead()
-	link.Print()

 	expected := []int{2, 3, 4}
 	values := link.Values()
@@ -83,8 +77,7 @@ func TestDoublyLink_DeleteAtTail(t *testing.T) {
 	assert := internal.NewAssert(t, "TestDoublyLink_DeleteAtTail")

 	link := NewDoublyLink[int]()
-	err := link.DeleteAtTail()
-	assert.IsNotNil(err)
+	link.DeleteAtTail()

 	link.InsertAtTail(1)
 	link.InsertAtTail(2)
@@ -92,7 +85,6 @@ func TestDoublyLink_DeleteAtTail(t *testing.T) {
 	link.InsertAtTail(4)

 	link.DeleteAtTail()
-	link.Print()

 	expected := []int{1, 2, 3}
 	values := link.Values()
@@ -104,8 +96,7 @@ func TestDoublyLink_DeleteAt(t *testing.T) {
 	assert := internal.NewAssert(t, "TestDoublyLink_DeleteAt")

 	link := NewDoublyLink[int]()
-	err := link.DeleteAt(0)
-	assert.IsNotNil(err)
+	link.DeleteAt(0)

 	link.InsertAtTail(1)
 	link.InsertAtTail(2)
@@ -113,11 +104,7 @@ func TestDoublyLink_DeleteAt(t *testing.T) {
 	link.InsertAtTail(4)
 	link.InsertAtTail(5)

-	err = link.DeleteAt(5)
-	assert.IsNotNil(err)
-
-	err = link.DeleteAt(0)
-	assert.IsNil(err)
+	link.DeleteAt(0)
 	assert.Equal([]int{2, 3, 4, 5}, link.Values())

 	link.DeleteAt(3)
--- a/datastructure/link/singlylink.go
+++ b/datastructure/link/singlylink.go
@@ -1,14 +1,13 @@
 package datastructure

 import (
-	"errors"
 	"fmt"
 	"reflect"

 	"github.com/duke-git/lancet/v2/datastructure"
 )

-// SinglyLink is a linked list. Whose node has a Value generics and Next pointer points to a next node of the link.
+// SinglyLink is a linked list. Whose node has a Value generics and Next pointer points to a next node of the sl.
 type SinglyLink[T any] struct {
 	Head   *datastructure.LinkNode[T]
 	length int
@@ -20,18 +19,18 @@ func NewSinglyLink[T any]() *SinglyLink[T] {
 }

 // InsertAtHead insert value into singly linklist at head index
-func (link *SinglyLink[T]) InsertAtHead(value T) {
+func (sl *SinglyLink[T]) InsertAtHead(value T) {
 	newNode := datastructure.NewLinkNode(value)
-	newNode.Next = link.Head
-	link.Head = newNode
-	link.length++
+	newNode.Next = sl.Head
+	sl.Head = newNode
+	sl.length++
 }

 // InsertAtTail insert value into singly linklist at tail index
-func (link *SinglyLink[T]) InsertAtTail(value T) {
-	current := link.Head
+func (sl *SinglyLink[T]) InsertAtTail(value T) {
+	current := sl.Head
 	if current == nil {
-		link.InsertAtHead(value)
+		sl.InsertAtHead(value)
 		return
 	}

@@ -43,65 +42,63 @@ func (link *SinglyLink[T]) InsertAtTail(value T) {
 	newNode.Next = nil
 	current.Next = newNode

-	link.length++
+	sl.length++
 }

 // InsertAt insert value into singly linklist at index
-func (link *SinglyLink[T]) InsertAt(index int, value T) error {
-	size := link.length
+// param `index` should between [0, len(SinglyLink)], if index do not meet the conditions, do nothing
+func (sl *SinglyLink[T]) InsertAt(index int, value T) {
+	size := sl.length
 	if index < 0 || index > size {
-		return errors.New("param index should between 0 and the length of singly link.")
+		return
 	}

 	if index == 0 {
-		link.InsertAtHead(value)
-		return nil
+		sl.InsertAtHead(value)
+		return
 	}

 	if index == size {
-		link.InsertAtTail(value)
-		return nil
+		sl.InsertAtTail(value)
+		return
 	}

 	i := 0
-	current := link.Head
+	current := sl.Head

 	for current != nil {
 		if i == index-1 {
 			newNode := datastructure.NewLinkNode(value)
 			newNode.Next = current.Next
 			current.Next = newNode
-			link.length++
-
-			return nil
+			sl.length++
+			return
 		}
 		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")
+func (sl *SinglyLink[T]) DeleteAtHead() {
+	if sl.Head == nil {
+		return
 	}
-	current := link.Head
-	link.Head = current.Next
-	link.length--

-	return nil
+	current := sl.Head
+	sl.Head = current.Next
+	sl.length--
 }

-// 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")
+// DeleteAtTail delete value in singly linklist at tail
+func (sl *SinglyLink[T]) DeleteAtTail() {
+	if sl.Head == nil {
+		return
 	}
-	current := link.Head
+
+	current := sl.Head
 	if current.Next == nil {
-		return link.DeleteAtHead()
+		sl.DeleteAtHead()
 	}

 	for current.Next.Next != nil {
@@ -109,68 +106,66 @@ func (link *SinglyLink[T]) DeleteAtTail() error {
 	}

 	current.Next = nil
-	link.length--
-	return nil
+	sl.length--
 }

 // 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")
+// param `index` should be [0, len(SinglyLink)-1]
+func (sl *SinglyLink[T]) DeleteAt(index int) {
+	if sl.Head == nil {
+		return
 	}
-	current := link.Head
+	current := sl.Head
 	if current.Next == nil || index == 0 {
-		return link.DeleteAtHead()
+		sl.DeleteAtHead()
 	}

-	if index == link.length-1 {
-		return link.DeleteAtTail()
+	if index == sl.length-1 {
+		sl.DeleteAtTail()
 	}

-	if index < 0 || index > link.length-1 {
-		return errors.New("param index should between 0 and link size -1.")
+	if index < 0 || index > sl.length-1 {
+		return
 	}

 	i := 0
 	for current != nil {
 		if i == index-1 {
 			current.Next = current.Next.Next
-			link.length--
-			return nil
+			sl.length--
+			return
 		}
 		i++
 		current = current.Next
 	}
-
-	return errors.New("delete error")
 }

 // DeleteValue delete value in singly linklist
-func (link *SinglyLink[T]) DeleteValue(value T) {
-	if link.Head == nil {
+func (sl *SinglyLink[T]) DeleteValue(value T) {
+	if sl.Head == nil {
 		return
 	}
 	dummyHead := datastructure.NewLinkNode(value)
-	dummyHead.Next = link.Head
+	dummyHead.Next = sl.Head
 	current := dummyHead

 	for current.Next != nil {
 		if reflect.DeepEqual(current.Next.Value, value) {
 			current.Next = current.Next.Next
-			link.length--
+			sl.length--
 		} else {
 			current = current.Next
 		}
 	}

-	link.Head = dummyHead.Next
+	sl.Head = dummyHead.Next
 }

 // Reverse the linked list
-func (link *SinglyLink[T]) Reverse() {
+func (sl *SinglyLink[T]) Reverse() {
 	var pre, next *datastructure.LinkNode[T]

-	current := link.Head
+	current := sl.Head

 	for current != nil {
 		next = current.Next
@@ -179,19 +174,19 @@ func (link *SinglyLink[T]) Reverse() {
 		current = next
 	}

-	link.Head = pre
+	sl.Head = pre
 }

 // GetMiddleNode return node at middle index of linked list
-func (link *SinglyLink[T]) GetMiddleNode() *datastructure.LinkNode[T] {
-	if link.Head == nil {
+func (sl *SinglyLink[T]) GetMiddleNode() *datastructure.LinkNode[T] {
+	if sl.Head == nil {
 		return nil
 	}
-	if link.Head.Next == nil {
-		return link.Head
+	if sl.Head.Next == nil {
+		return sl.Head
 	}
-	fast := link.Head
-	slow := link.Head
+	fast := sl.Head
+	slow := sl.Head

 	for fast != nil {
 		fast = fast.Next
@@ -207,14 +202,14 @@ func (link *SinglyLink[T]) GetMiddleNode() *datastructure.LinkNode[T] {
 }

 // Size return the count of singly linked list
-func (link *SinglyLink[T]) Size() int {
-	return link.length
+func (sl *SinglyLink[T]) Size() int {
+	return sl.length
 }

 // Values return slice of all singly linklist node value
-func (link *SinglyLink[T]) Values() []T {
+func (sl *SinglyLink[T]) Values() []T {
 	result := []T{}
-	current := link.Head
+	current := sl.Head
 	for current != nil {
 		result = append(result, current.Value)
 		current = current.Next
@@ -222,20 +217,20 @@ func (link *SinglyLink[T]) Values() []T {
 	return result
 }

-// IsEmpty checks if link is empty or not
-func (link *SinglyLink[T]) IsEmpty() bool {
-	return link.length == 0
+// IsEmpty checks if sl is empty or not
+func (sl *SinglyLink[T]) IsEmpty() bool {
+	return sl.length == 0
 }

 // Clear all the node in singly linklist
-func (link *SinglyLink[T]) Clear() {
-	link.Head = nil
-	link.length = 0
+func (sl *SinglyLink[T]) Clear() {
+	sl.Head = nil
+	sl.length = 0
 }

 // Print all nodes info of a linked list
-func (link *SinglyLink[T]) Print() {
-	current := link.Head
+func (sl *SinglyLink[T]) Print() {
+	current := sl.Head
 	info := "[ "
 	for current != nil {
 		info += fmt.Sprintf("%+v, ", current)
--- a/datastructure/link/singlylink_test.go
+++ b/datastructure/link/singlylink_test.go
@@ -41,25 +41,12 @@ func TestSinglyLink_InsertAt(t *testing.T) {

 	link := NewSinglyLink[int]()

-	err := link.InsertAt(1, 1)
-	assert.IsNotNil(err)
+	link.InsertAt(1, 1) //do nothing

-	err = link.InsertAt(0, 1)
-	if err != nil {
-		t.FailNow()
-	}
-	err = link.InsertAt(1, 2)
-	if err != nil {
-		t.FailNow()
-	}
-	err = link.InsertAt(2, 4)
-	if err != nil {
-		t.FailNow()
-	}
-	err = link.InsertAt(2, 3)
-	if err != nil {
-		t.FailNow()
-	}
+	link.InsertAt(0, 1)
+	link.InsertAt(1, 2)
+	link.InsertAt(2, 4)
+	link.InsertAt(2, 3)

 	link.Print()

@@ -73,8 +60,8 @@ func TestSinglyLink_DeleteAtHead(t *testing.T) {
 	assert := internal.NewAssert(t, "TestSinglyLink_DeleteAtHead")

 	link := NewSinglyLink[int]()
-	err := link.DeleteAtHead()
-	assert.IsNotNil(err)
+
+	link.DeleteAtHead()

 	link.InsertAtTail(1)
 	link.InsertAtTail(2)
@@ -94,8 +81,6 @@ 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)
@@ -103,7 +88,6 @@ func TestSinglyLink_DeleteAtTail(t *testing.T) {
 	link.InsertAtTail(4)

 	link.DeleteAtTail()
-	link.Print()

 	expected := []int{1, 2, 3}
 	values := link.Values()
@@ -133,8 +117,6 @@ 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)
@@ -142,11 +124,7 @@ func TestSinglyLink_DeleteAt(t *testing.T) {
 	link.InsertAtTail(4)
 	link.InsertAtTail(5)

-	err = link.DeleteAt(5)
-	assert.IsNotNil(err)
-
-	err = link.DeleteAt(0)
-	assert.IsNil(err)
+	link.DeleteAt(0)
 	assert.Equal([]int{2, 3, 4, 5}, link.Values())

 	link.DeleteAt(3)
@@ -167,7 +145,6 @@ func TestSinglyLink_Reverse(t *testing.T) {
 	link.InsertAtTail(4)

 	link.Reverse()
-	link.Print()
 	assert.Equal([]int{4, 3, 2, 1}, link.Values())
 }

--- a/datastructure/list/list.go
+++ b/datastructure/list/list.go
@@ -156,7 +156,7 @@ func (l *List[T]) DeleteAt(index int) {
 		return
 	}
 	if index == size-1 {
-		data = append(data[:index])
+		data = data[:index]
 	} else {
 		data = append(data[:index], data[index+1:]...)
 	}
@@ -174,7 +174,7 @@ func (l *List[T]) DeleteIf(f func(T) bool) int {
 			continue
 		}
 		if index == size-1 {
-			data = append(data[:index])
+			data = data[:index]
 		} else {
 			data = append(data[:index], data[index+1:]...)
 			index--
@@ -221,7 +221,7 @@ func (l *List[T]) IsEmpty() bool {

 // Clear the data of list
 func (l *List[T]) Clear() {
-	l.data = make([]T, 0, 0)
+	l.data = make([]T, 0)
 }

 // Clone return a copy of list
@@ -235,7 +235,7 @@ func (l *List[T]) Clone() *List[T] {
 // 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))
+	ml := NewList(make([]T, l1+l2))

 	data := append([]T{}, append(l.data, other.data...)...)
 	ml.data = data
@@ -274,7 +274,7 @@ func (l *List[T]) Unique() {
 	data := l.data
 	size := len(data)

-	uniqueData := make([]T, 0, 0)
+	uniqueData := make([]T, 0)
 	for i := 0; i < size; i++ {
 		value := data[i]
 		skip := true
@@ -305,7 +305,7 @@ func (l *List[T]) Union(other *List[T]) *List[T] {

 // Intersection creates a new list whose element both be contained in list l and other
 func (l *List[T]) Intersection(other *List[T]) *List[T] {
-	result := NewList(make([]T, 0, 0))
+	result := NewList(make([]T, 0))

 	for _, v := range l.data {
 		if other.Contain(v) {
--- a/datastructure/queue/arrayqueue_test.go
+++ b/datastructure/queue/arrayqueue_test.go
@@ -18,8 +18,6 @@ func TestArrayQueue_Enqueue(t *testing.T) {
 	data := queue.Data()
 	size := queue.Size()

-	queue.Print()
-
 	assert.Equal(expected, data)
 	assert.Equal(3, size)
 }
@@ -35,7 +33,6 @@ func TestArrayQueue_Dequeue(t *testing.T) {
 	val, ok := queue.Dequeue()
 	assert.Equal(true, ok)

-	queue.Print()
 	assert.Equal(1, val)
 	assert.Equal([]int{2, 3}, queue.Data())
 }
@@ -50,8 +47,6 @@ func TestArrayQueue_Front(t *testing.T) {

 	val := queue.Front()

-	queue.Print()
-
 	assert.Equal(1, val)
 	assert.Equal([]int{1, 2, 3}, queue.Data())
 }
@@ -66,8 +61,6 @@ func TestArrayQueue_Back(t *testing.T) {

 	val := queue.Back()

-	queue.Print()
-
 	assert.Equal(3, val)
 	assert.Equal([]int{1, 2, 3}, queue.Data())
 }
--- a/datastructure/queue/circularqueue_test.go
+++ b/datastructure/queue/circularqueue_test.go
@@ -10,31 +10,43 @@ 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()
+	err := queue.Enqueue(1)
+	assert.IsNil(err)
+
+	err = queue.Enqueue(2)
+	assert.IsNil(err)
+
+	err = queue.Enqueue(3)
+	assert.IsNil(err)
+
+	err = queue.Enqueue(4)
+	assert.IsNil(err)
+
+	err = queue.Enqueue(5)
+	assert.IsNil(err)
+
 	assert.Equal([]int{1, 2, 3, 4, 5}, queue.Data())
 	assert.Equal(5, queue.Size())

-	err := queue.Enqueue(6)
+	err = queue.Enqueue(6)
 	assert.IsNotNil(err)
 }

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

-	queue := NewCircularQueue[int](6)
+	queue := NewCircularQueue[int](4)
 	assert.Equal(true, queue.IsEmpty())

-	queue.Enqueue(1)
-	queue.Enqueue(2)
-	queue.Enqueue(3)
-	queue.Enqueue(4)
-	queue.Enqueue(5)
+	err := queue.Enqueue(1)
+	assert.IsNil(err)
+
+	err = queue.Enqueue(2)
+	assert.IsNil(err)
+
+	err = queue.Enqueue(3)
+	assert.IsNil(err)

 	val, err := queue.Dequeue()
 	assert.IsNil(err)
@@ -43,11 +55,7 @@ func TestCircularQueue_Dequeue(t *testing.T) {
 	assert.Equal(false, queue.IsFull())

 	val, _ = queue.Dequeue()
-	queue.Print()
 	assert.Equal(2, *val)
-
-	queue.Enqueue(6)
-	queue.Print()
 	assert.Equal(false, queue.IsFull())
 }

@@ -55,55 +63,52 @@ 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()
+	err := queue.Enqueue(1)
+	assert.IsNil(err)

-	queue.Dequeue()
-	queue.Dequeue()
-	queue.Enqueue(6)
-	queue.Enqueue(7)
+	err = queue.Enqueue(2)
+	assert.IsNil(err)

-	queue.Print()
+	err = queue.Enqueue(3)
+	assert.IsNil(err)

 	val := queue.Front()
-	assert.Equal(3, val)
-	assert.Equal(5, queue.Size())
+	assert.IsNil(err)
+	assert.Equal(1, val)
+	assert.Equal(3, queue.Size())
 }

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

-	queue := NewCircularQueue[int](6)
+	queue := NewCircularQueue[int](3)
 	assert.Equal(true, queue.IsEmpty())

-	queue.Enqueue(1)
-	queue.Enqueue(2)
-	queue.Enqueue(3)
-	queue.Enqueue(4)
-	queue.Enqueue(5)
+	err := queue.Enqueue(1)
+	assert.IsNil(err)

-	queue.Print()
-	assert.Equal(5, queue.Back())
+	err = queue.Enqueue(2)
+	assert.IsNil(err)

-	queue.Dequeue()
-	queue.Dequeue()
-	queue.Enqueue(6)
-	queue.Enqueue(7)
+	assert.Equal(2, queue.Back())

-	queue.Print()
-	assert.Equal(7, queue.Back())
+	val, _ := queue.Dequeue()
+	assert.Equal(1, *val)
+
+	err = queue.Enqueue(3)
+	assert.IsNil(err)
+
+	assert.Equal(3, queue.Back())
 }

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

 	queue := NewCircularQueue[int](2)
-	queue.Enqueue(1)
+	err := queue.Enqueue(1)
+	assert.IsNil(err)
+
 	assert.Equal(true, queue.Contain(1))
 	assert.Equal(false, queue.Contain(2))
 }
@@ -115,7 +120,9 @@ func TestCircularQueue_Clear(t *testing.T) {
 	assert.Equal(true, queue.IsEmpty())
 	assert.Equal(0, queue.Size())

-	queue.Enqueue(1)
+	err := queue.Enqueue(1)
+	assert.IsNil(err)
+
 	assert.Equal(false, queue.IsEmpty())
 	assert.Equal(1, queue.Size())

@@ -127,22 +134,12 @@ func TestCircularQueue_Clear(t *testing.T) {
 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 := NewCircularQueue[int](3)
+	err := queue.Enqueue(1)
+	assert.IsNil(err)

-	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())
+	err = queue.Enqueue(2)
+	assert.IsNil(err)

+	assert.Equal([]int{1, 2}, queue.Data())
 }
--- a/datastructure/queue/linkedqueue_test.go
+++ b/datastructure/queue/linkedqueue_test.go
@@ -14,8 +14,6 @@ func TestLinkedQueue_Enqueue(t *testing.T) {
 	queue.Enqueue(2)
 	queue.Enqueue(3)

-	queue.Print()
-
 	assert.Equal([]int{1, 2, 3}, queue.Data())
 	assert.Equal(3, queue.Size())
 }
--- a/datastructure/queue/priorityqueue_test.go
+++ b/datastructure/queue/priorityqueue_test.go
@@ -23,19 +23,24 @@ func TestPriorityQueue_Enqueue(t *testing.T) {
 	assert := internal.NewAssert(t, "TestPriorityQueue_Enqueue")

 	comparator := &intComparator{}
-	pq := NewPriorityQueue[int](10, comparator)
+	pq := NewPriorityQueue[int](3, comparator)

 	assert.Equal(true, pq.IsEmpty())
 	assert.Equal(false, pq.IsFull())

-	for i := 1; i < 11; i++ {
-		pq.Enqueue(i)
-	}
+	err := pq.Enqueue(1)
+	assert.IsNil(err)
+
+	err = pq.Enqueue(2)
+	assert.IsNil(err)
+
+	err = pq.Enqueue(3)
+	assert.IsNil(err)

 	assert.Equal(true, pq.IsFull())

 	queueData := pq.Data()
-	assert.Equal([]int{10, 9, 6, 7, 8, 2, 5, 1, 4, 3}, queueData)
+	assert.Equal([]int{3, 1, 2}, queueData)

 }

@@ -43,22 +48,23 @@ func TestPriorityQueue_Dequeue(t *testing.T) {
 	assert := internal.NewAssert(t, "TestPriorityQueue_Dequeue")

 	comparator := &intComparator{}
-	pq := NewPriorityQueue[int](10, comparator)
+	pq := NewPriorityQueue[int](3, comparator)

 	_, ok := pq.Dequeue()
 	assert.Equal(false, ok)

-	for i := 1; i < 11; i++ {
-		pq.Enqueue(i)
-	}
+	err := pq.Enqueue(1)
+	assert.IsNil(err)

-	assert.Equal(10, pq.Size())
+	err = pq.Enqueue(2)
+	assert.IsNil(err)
+
+	err = pq.Enqueue(3)
+	assert.IsNil(err)
+
+	assert.Equal(3, pq.Size())

 	val, ok := pq.Dequeue()
 	assert.Equal(true, ok)
-	assert.Equal(10, val)
-
-	assert.Equal([]int{9, 8, 6, 7, 3, 2, 5, 1, 4}, pq.Data())
-
-	assert.Equal(9, pq.Size())
+	assert.Equal(3, val)
 }
--- a/datastructure/set/set.go
+++ b/datastructure/set/set.go
@@ -4,22 +4,59 @@ package datastructure
 type Set[T comparable] map[T]struct{}

 // NewSet return a instance of set
-func NewSet[T comparable](values ...T) Set[T] {
+func NewSet[T comparable](items ...T) Set[T] {
 	set := make(Set[T])
-	set.Add(values...)
+	set.Add(items...)
 	return set
 }

-// Add value to set
-func (s Set[T]) Add(values ...T) {
-	for _, v := range values {
+// NewSetFromSlice create a set from slice
+func NewSetFromSlice[T comparable](items []T) Set[T] {
+	set := make(Set[T])
+	for _, item := range items {
+		set.Add(item)
+	}
+	return set
+}
+
+// Add items to set
+func (s Set[T]) Add(items ...T) {
+	for _, v := range items {
 		s[v] = struct{}{}
 	}
 }

-// Contain checks if set contains value or not
-func (s Set[T]) Contain(value T) bool {
-	_, ok := s[value]
+// AddIfNotExist checks if item exists in the set,
+// it adds the item to set and returns true if it does not exist in the set,
+// or else it does nothing and returns false.
+func (s Set[T]) AddIfNotExist(item T) bool {
+	if !s.Contain(item) {
+		if _, ok := s[item]; !ok {
+			s[item] = struct{}{}
+			return true
+		}
+	}
+	return false
+}
+
+// AddIfNotExistBy checks if item exists in the set and pass the `checker` function
+// it adds the item to set and returns true if it does not exists in the set and
+// function `checker` returns true, or else it does nothing and returns false.
+func (s Set[T]) AddIfNotExistBy(item T, checker func(element T) bool) bool {
+	if !s.Contain(item) {
+		if checker(item) {
+			if _, ok := s[item]; !ok {
+				s[item] = struct{}{}
+				return true
+			}
+		}
+	}
+	return false
+}
+
+// Contain checks if set contains item or not
+func (s Set[T]) Contain(item T) bool {
+	_, ok := s[item]
 	return ok
 }

@@ -41,9 +78,9 @@ func (s Set[T]) Clone() Set[T] {
 	return set
 }

-// Delete value of set
-func (s Set[T]) Delete(values ...T) {
-	for _, v := range values {
+// Delete item of set
+func (s Set[T]) Delete(items ...T) {
+	for _, v := range items {
 		delete(s, v)
 	}
 }
@@ -58,7 +95,7 @@ func (s Set[T]) Equal(other Set[T]) bool {
 }

 // Iterate call function by every element of set
-func (s Set[T]) Iterate(fn func(value T)) {
+func (s Set[T]) Iterate(fn func(item T)) {
 	for v := range s {
 		fn(v)
 	}
@@ -76,13 +113,13 @@ func (s Set[T]) Size() int {

 // Values return all values of set
 func (s Set[T]) Values() []T {
-	values := make([]T, 0, 0)
+	result := make([]T, 0, len(s))

 	s.Iterate(func(value T) {
-		values = append(values, value)
+		result = append(result, value)
 	})

-	return values
+	return result
 }

 // Union creates a new set contain all element of set s and other
--- a/datastructure/set/set_test.go
+++ b/datastructure/set/set_test.go
@@ -6,6 +6,19 @@ import (
 	"github.com/duke-git/lancet/v2/internal"
 )

+func TestSet_NewSetFromSlice(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSet_NewSetFromSlice")
+
+	s1 := NewSetFromSlice([]int{1, 2, 2, 3})
+	assert.Equal(3, s1.Size())
+	assert.Equal(true, s1.Contain(1))
+	assert.Equal(true, s1.Contain(2))
+	assert.Equal(true, s1.Contain(3))
+
+	s2 := NewSetFromSlice([]int{})
+	assert.Equal(0, s2.Size())
+}
+
 func TestSet_Add(t *testing.T) {
 	assert := internal.NewAssert(t, "TestSet_Add")

@@ -17,6 +30,38 @@ func TestSet_Add(t *testing.T) {
 	assert.Equal(true, set.Equal(expected))
 }

+func TestSet_AddIfNotExist(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSet_AddIfNotExist")
+
+	set := NewSet[int]()
+	set.Add(1, 2, 3)
+
+	assert.Equal(false, set.AddIfNotExist(1))
+	assert.Equal(true, set.AddIfNotExist(4))
+	assert.Equal(NewSet(1, 2, 3, 4), set)
+}
+
+func TestSet_AddIfNotExistBy(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSet_AddIfNotExistBy")
+
+	set := NewSet[int]()
+	set.Add(1, 2)
+
+	ok := set.AddIfNotExistBy(3, func(val int) bool {
+		return val%2 != 0
+	})
+
+	notOk := set.AddIfNotExistBy(4, func(val int) bool {
+		return val%2 != 0
+	})
+
+	assert.Equal(true, ok)
+	assert.Equal(false, notOk)
+
+	assert.Equal(true, set.Contain(3))
+	assert.Equal(false, set.Contain(4))
+}
+
 func TestSet_Contain(t *testing.T) {
 	assert := internal.NewAssert(t, "TestSet_Contain")

--- a/datastructure/stack/linkedstack_test.go
+++ b/datastructure/stack/linkedstack_test.go
@@ -14,8 +14,6 @@ func TestLinkedStack_Push(t *testing.T) {
 	stack.Push(2)
 	stack.Push(3)

-	stack.Print()
-
 	expected := []int{3, 2, 1}
 	values := stack.Data()
 	size := stack.Size()
--- a/datastructure/tree/bstree_test.go
+++ b/datastructure/tree/bstree_test.go
@@ -27,8 +27,6 @@ func TestBSTree_Insert(t *testing.T) {
 	bstree.Insert(5)
 	bstree.Insert(2)
 	bstree.Insert(4)
-
-	bstree.Print()
 }

 func TestBSTree_PreOrderTraverse(t *testing.T) {
@@ -86,8 +84,6 @@ func TestBSTree_LevelOrderTraverse(t *testing.T) {
 	bstree.Insert(2)
 	bstree.Insert(4)

-	bstree.Print()
-
 	acturl := bstree.LevelOrderTraverse()
 	t.Log(acturl)
 	assert.Equal([]int{6, 5, 7, 2, 4}, acturl)
@@ -103,10 +99,8 @@ func TestBSTree_Delete(t *testing.T) {
 	bstree.Insert(2)
 	bstree.Insert(4)

-	bstree.Print()
-
 	bstree.Delete(4)
-	bstree.Print()
+
 	acturl1 := bstree.InOrderTraverse()
 	t.Log(acturl1)
 	assert.Equal([]int{2, 5, 6, 7}, acturl1)
@@ -129,8 +123,6 @@ func TestBSTree_Depth(t *testing.T) {
 	bstree.Insert(2)
 	bstree.Insert(4)

-	bstree.Print()
-
 	assert.Equal(bstree.Depth(), 4)
 }

@@ -150,8 +142,6 @@ func TestBSTree_IsSubTree(t *testing.T) {
 	subTree.Insert(4)
 	subTree.Insert(6)

-	subTree.Print()
-
 	assert.Equal(true, superTree.HasSubTree(subTree))
 	assert.Equal(false, subTree.HasSubTree(superTree))
 }
--- a/datastructure/tree/tree_internal.go
+++ b/datastructure/tree/tree_internal.go
@@ -38,35 +38,35 @@ func inOrderTraverse[T any](node *datastructure.TreeNode[T]) []T {
 	return data
 }

-func preOrderPrint[T any](node *datastructure.TreeNode[T]) {
-	if node == nil {
-		return
-	}
+// func preOrderPrint[T any](node *datastructure.TreeNode[T]) {
+// 	if node == nil {
+// 		return
+// 	}

-	fmt.Printf("%v, ", node.Value)
-	preOrderPrint(node.Left)
-	preOrderPrint(node.Right)
-}
+// 	fmt.Printf("%v, ", node.Value)
+// 	preOrderPrint(node.Left)
+// 	preOrderPrint(node.Right)
+// }

-func postOrderPrint[T any](node *datastructure.TreeNode[T]) {
-	if node == nil {
-		return
-	}
+// func postOrderPrint[T any](node *datastructure.TreeNode[T]) {
+// 	if node == nil {
+// 		return
+// 	}

-	preOrderPrint(node.Left)
-	preOrderPrint(node.Right)
-	fmt.Printf("%v, ", node.Value)
-}
+// 	postOrderPrint(node.Left)
+// 	postOrderPrint(node.Right)
+// 	fmt.Printf("%v, ", node.Value)
+// }

-func inOrderPrint[T any](node *datastructure.TreeNode[T]) {
-	if node == nil {
-		return
-	}
+// func inOrderPrint[T any](node *datastructure.TreeNode[T]) {
+// 	if node == nil {
+// 		return
+// 	}

-	inOrderPrint(node.Left)
-	fmt.Printf("%v, ", node.Value)
-	inOrderPrint(node.Right)
-}
+// 	inOrderPrint(node.Left)
+// 	fmt.Printf("%v, ", node.Value)
+// 	inOrderPrint(node.Right)
+// }

 func levelOrderTraverse[T any](root *datastructure.TreeNode[T], traversal *[]T) {
 	var q []*datastructure.TreeNode[T] // queue
--- a/datetime/datetime.go
+++ b/datetime/datetime.go
@@ -4,24 +4,24 @@
 // Package datetime implements some functions to format date and time.
 // Note:
 // 1. `format` param in FormatTimeToStr function should be as flow:
-//"yyyy-mm-dd hh:mm:ss"
-//"yyyy-mm-dd hh:mm"
-//"yyyy-mm-dd hh"
-//"yyyy-mm-dd"
-//"yyyy-mm"
-//"mm-dd"
-//"dd-mm-yy hh:mm:ss"
-//"yyyy/mm/dd hh:mm:ss"
-//"yyyy/mm/dd hh:mm"
-//"yyyy/mm/dd hh"
-//"yyyy/mm/dd"
-//"yyyy/mm"
-//"mm/dd"
-//"dd/mm/yy hh:mm:ss"
-//"yyyy"
-//"mm"
-//"hh:mm:ss"
-//"mm:ss"
+// "yyyy-mm-dd hh:mm:ss"
+// "yyyy-mm-dd hh:mm"
+// "yyyy-mm-dd hh"
+// "yyyy-mm-dd"
+// "yyyy-mm"
+// "mm-dd"
+// "dd-mm-yy hh:mm:ss"
+// "yyyy/mm/dd hh:mm:ss"
+// "yyyy/mm/dd hh:mm"
+// "yyyy/mm/dd hh"
+// "yyyy/mm/dd"
+// "yyyy/mm"
+// "mm/dd"
+// "dd/mm/yy hh:mm:ss"
+// "yyyy"
+// "mm"
+// "hh:mm:ss"
+// "mm:ss"
 package datetime

 import (
@@ -147,16 +147,32 @@ func EndOfDay(t time.Time) time.Time {
 	return time.Date(y, m, d, 23, 59, 59, int(time.Second-time.Nanosecond), t.Location())
 }

-// BeginOfWeek return beginning week, week begin from Sunday
-func BeginOfWeek(t time.Time) time.Time {
-	y, m, d := t.AddDate(0, 0, 0-int(BeginOfDay(t).Weekday())).Date()
-	return time.Date(y, m, d, 0, 0, 0, 0, t.Location())
+// BeginOfWeek return beginning week, default week begin from Sunday
+func BeginOfWeek(t time.Time, beginFrom ...time.Weekday) time.Time {
+	var beginFromWeekday = time.Sunday
+	if len(beginFrom) > 0 {
+		beginFromWeekday = beginFrom[0]
+	}
+	y, m, d := t.AddDate(0, 0, int(beginFromWeekday-t.Weekday())).Date()
+	beginOfWeek := time.Date(y, m, d, 0, 0, 0, 0, t.Location())
+	if beginOfWeek.After(t) {
+		return beginOfWeek.AddDate(0, 0, -7)
+	}
+	return beginOfWeek
 }

-// EndOfWeek return end week time, week end with Saturday
-func EndOfWeek(t time.Time) time.Time {
-	y, m, d := BeginOfWeek(t).AddDate(0, 0, 7).Add(-time.Nanosecond).Date()
-	return time.Date(y, m, d, 23, 59, 59, int(time.Second-time.Nanosecond), t.Location())
+// EndOfWeek return end week time, default week end with Saturday
+func EndOfWeek(t time.Time, endWith ...time.Weekday) time.Time {
+	var endWithWeekday = time.Saturday
+	if len(endWith) > 0 {
+		endWithWeekday = endWith[0]
+	}
+	y, m, d := t.AddDate(0, 0, int(endWithWeekday-t.Weekday())).Date()
+	var endWithWeek = time.Date(y, m, d, 23, 59, 59, int(time.Second-time.Nanosecond), t.Location())
+	if endWithWeek.Before(t) {
+		endWithWeek = endWithWeek.AddDate(0, 0, 7)
+	}
+	return endWithWeek
 }

 // BeginOfMonth return beginning of month
--- a/docs/algorithm.md
+++ b/docs/algorithm.md
@@ -21,6 +21,7 @@ import (
 <div STYLE="page-break-after: always;"></div>

 ## Index
+
 - [BubbleSort](#BubbleSort)
 - [InsertionSort](#InsertionSort)
 - [SelectionSort](#SelectionSort)
@@ -31,7 +32,6 @@ import (
 - [CountSort](#CountSort)
 - [BinarySearch](#BinarySearch)
 - [BinaryIterativeSearch](#BinaryIterativeSearch)
-
 - [LinearSearch](#LinearSearch)
 - [LRUCache](#LRUCache)

--- a/docs/algorithm_zh-CN.md
+++ b/docs/algorithm_zh-CN.md
@@ -29,7 +29,6 @@ import (
 - [QuickSort](#QuickSort)
 - [HeapSort](#HeapSort)
 - [MergeSort](#MergeSort)
-
 - [CountSort](#CountSort)
 - [BinarySearch](#BinarySearch)
 - [BinaryIterativeSearch](#BinaryIterativeSearch)
--- a/docs/condition.md
+++ b/docs/condition.md
@@ -0,0 +1,264 @@
+# Condition
+Package condition contains some functions for conditional judgment. eg. And, Or, TernaryOperator... The implementation of this package refers to the implementation of carlmjohnson's truthy package, you may find more useful information in [truthy](https://github.com/carlmjohnson/truthy), thanks carlmjohnson.
+
+<div STYLE="page-break-after: always;"></div>
+
+## Source:
+
+- [https://github.com/duke-git/lancet/blob/main/condition/condition.go](https://github.com/duke-git/lancet/blob/main/condition/condition.go)
+
+<div STYLE="page-break-after: always;"></div>
+
+## Usage:
+```go
+import (
+    "github.com/duke-git/lancet/v2/condition"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## Index
+
+- [Bool](#Bool)
+- [And](#And)
+- [Or](#Or)
+- [Xor](#Generate)
+- [Nor](#Nor)
+- [Nand](#Nand)
+- [TernaryOperator](#TernaryOperator)
+
+<div STYLE="page-break-after: always;"></div>
+
+## Documentation
+
+
+### <span id="Bool">Bool</span>
+<p>Returns the truthy value of anything.<br/>
+If the value's type has a Bool() bool method, the method is called and returned.<br/>
+If the type has an IsZero() bool method, the opposite value is returned.<br/>
+Slices and maps are truthy if they have a length greater than zero.<br/>
+All other types are truthy if they are not their zero value.</p>
+
+<b>Signature:</b>
+
+```go
+func Bool[T any](value T) bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/condition"
+)
+
+func main() {
+	// bool
+	fmt.Println(condition.Bool(false)) // false
+	fmt.Println(condition.Bool(true)) // true
+
+	// integer
+	fmt.Println(condition.Bool(0)) // false
+	fmt.Println(condition.Bool(1)) // true
+
+	// float
+	fmt.Println(condition.Bool(0.0)) // false
+	fmt.Println(condition.Bool(0.1)) // true
+
+	// string
+	fmt.Println(condition.Bool("")) // false
+	fmt.Println(condition.Bool(" ")) // true
+	fmt.Println(condition.Bool("0")) // true
+
+	// slice
+	var nums [2]int
+	fmt.Println(condition.Bool(nums)) // false
+	nums = [2]int{0, 1}
+	fmt.Println(condition.Bool(nums)) // true
+
+	// map
+	fmt.Println(condition.Bool(map[string]string{})) // false
+	fmt.Println(condition.Bool(map[string]string{"a": "a"})) // true
+
+	// struct
+	fmt.Println(condition.Bool(struct{}{})) // false
+	fmt.Println(condition.Bool(time.Now())) // true
+}
+```
+
+
+
+### <span id="And">And</span>
+<p>Returns true if both a and b are truthy.</p>
+
+<b>Signature:</b>
+
+```go
+func And[T, U any](a T, b U) bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/condition"
+)
+
+func main() {
+	fmt.Println(condition.And(0, 1)) // false
+	fmt.Println(condition.And(0, "")) // false
+	fmt.Println(condition.And(0, "0")) // false
+	fmt.Println(condition.And(1, "0")) // true
+}
+```
+
+
+
+### <span id="Or">Or</span>
+<p>Returns false iff neither a nor b is truthy.</p>
+
+<b>Signature:</b>
+
+```go
+func Or[T, U any](a T, b U) bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/condition"
+)
+
+func main() {
+	fmt.Println(condition.Or(0, "")) // false
+	fmt.Println(condition.Or(0, 1)) // true
+	fmt.Println(condition.Or(0, "0")) // true
+	fmt.Println(condition.Or(1, "0")) // true
+}
+```
+
+
+
+### <span id="Xor">Xor</span>
+<p>Returns true iff a or b but not both is truthy.</p>
+
+<b>Signature:</b>
+
+```go
+func Xor[T, U any](a T, b U) bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/condition"
+)
+
+func main() {
+	fmt.Println(condition.Xor(0, 0)) // false
+	fmt.Println(condition.Xor(0, 1)) // true
+	fmt.Println(condition.Xor(1, 0)) // true
+	fmt.Println(condition.Xor(1, 1)) // false
+}
+```
+
+
+
+### <span id="Nor">Nor</span>
+<p>Returns true iff neither a nor b is truthy.</p>
+
+<b>Signature:</b>
+
+```go
+func Nor[T, U any](a T, b U) bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/condition"
+)
+
+func main() {
+	fmt.Println(condition.Nor(0, 0)) // true
+	fmt.Println(condition.Nor(0, 1)) // false
+	fmt.Println(condition.Nor(1, 0)) // false
+	fmt.Println(condition.Nor(1, 1)) // true
+}
+```
+
+
+
+### <span id="Nand">Nand</span>
+<p>Returns false iff both a and b are truthy</p>
+
+<b>Signature:</b>
+
+```go
+func Nand[T, U any](a T, b U) bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/condition"
+)
+
+func main() {
+	fmt.Println(condition.Nand(0, 0)) // true
+	fmt.Println(condition.Nand(0, 1)) // true
+	fmt.Println(condition.Nand(1, 0)) // true
+	fmt.Println(condition.Nand(1, 1)) // false
+}
+```
+
+
+
+### <span id="TernaryOperator">TernaryOperator</span>
+<p>Checks the value of param `isTrue`, if true return ifValue else return elseValue</p>
+
+<b>Signature:</b>
+
+```go
+func TernaryOperator[T, U any](isTrue T, ifValue U, elseValue U) U
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/condition"
+)
+
+func main() {
+	trueValue := "1"
+	falseValue := "0"
+
+	fmt.Println(condition.TernaryOperator(true, trueValue, falseValue)) // "1"
+}
+```
+
+
+
+
+
+
--- a/docs/condition_zh-CN.md
+++ b/docs/condition_zh-CN.md
@@ -0,0 +1,263 @@
+# Condition
+condition包含一些用于条件判断的函数。这个包的实现参考了carlmjohnson的truthy包的实现，更多有用的信息可以在[truthy](https://github.com/carlmjohnson/truthy)中找到，感谢carlmjohnson。
+
+<div STYLE="page-break-after: always;"></div>
+
+## 源码:
+
+- [https://github.com/duke-git/lancet/blob/main/condition/condition.go](https://github.com/duke-git/lancet/blob/main/condition/condition.go)
+
+<div STYLE="page-break-after: always;"></div>
+
+## 用法:
+```go
+import (
+    "github.com/duke-git/lancet/v2/condition"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## Index
+
+- [Bool](#Bool)
+- [And](#And)
+- [Or](#Or)
+- [Xor](#Generate)
+- [Nor](#Nor)
+- [Nand](#Nand)
+- [TernaryOperator](#TernaryOperator)
+
+<div STYLE="page-break-after: always;"></div>
+
+## 目录
+
+### <span id="Bool">Bool</span>
+<p>返回传入参数的bool值.<br/>
+如果出入类型参数含有Bool方法, 会调用该方法并返回<br/>
+如果传入类型参数有IsZero方法, 返回IsZero方法返回值的取反<br/>
+slices和map的length大于0时，返回true，否则返回false<br/>
+其他类型会判断是否是零值</p>
+
+<b>函数签名:</b>
+
+```go
+func Bool[T any](value T) bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/condition"
+)
+
+func main() {
+	// bool
+	fmt.Println(condition.Bool(false)) // false
+	fmt.Println(condition.Bool(true)) // true
+
+	// integer
+	fmt.Println(condition.Bool(0)) // false
+	fmt.Println(condition.Bool(1)) // true
+
+	// float
+	fmt.Println(condition.Bool(0.0)) // false
+	fmt.Println(condition.Bool(0.1)) // true
+
+	// string
+	fmt.Println(condition.Bool("")) // false
+	fmt.Println(condition.Bool(" ")) // true
+	fmt.Println(condition.Bool("0")) // true
+
+	// slice
+	var nums [2]int
+	fmt.Println(condition.Bool(nums)) // false
+	nums = [2]int{0, 1}
+	fmt.Println(condition.Bool(nums)) // true
+
+	// map
+	fmt.Println(condition.Bool(map[string]string{})) // false
+	fmt.Println(condition.Bool(map[string]string{"a": "a"})) // true
+
+	// struct
+	fmt.Println(condition.Bool(struct{}{})) // false
+	fmt.Println(condition.Bool(time.Now())) // true
+}
+```
+
+
+
+### <span id="And">And</span>
+<p>逻辑且操作，当切仅当a和b都为true时返回true</p>
+
+<b>函数签名:</b>
+
+```go
+func And[T, U any](a T, b U) bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/condition"
+)
+
+func main() {
+	fmt.Println(condition.And(0, 1)) // false
+	fmt.Println(condition.And(0, "")) // false
+	fmt.Println(condition.And(0, "0")) // false
+	fmt.Println(condition.And(1, "0")) // true
+}
+```
+
+
+
+### <span id="Or">Or</span>
+<p>逻辑或操作，当切仅当a和b都为false时返回false</p>
+
+<b>函数签名:</b>
+
+```go
+func Or[T, U any](a T, b U) bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/condition"
+)
+
+func main() {
+	fmt.Println(condition.Or(0, "")) // false
+	fmt.Println(condition.Or(0, 1)) // true
+	fmt.Println(condition.Or(0, "0")) // true
+	fmt.Println(condition.Or(1, "0")) // true
+}
+```
+
+
+
+### <span id="Xor">Xor</span>
+<p>逻辑异或操作，a和b相同返回false，a和b不相同返回true</p>
+
+<b>函数签名:</b>
+
+```go
+func Xor[T, U any](a T, b U) bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/condition"
+)
+
+func main() {
+	fmt.Println(condition.Xor(0, 0)) // false
+	fmt.Println(condition.Xor(0, 1)) // true
+	fmt.Println(condition.Xor(1, 0)) // true
+	fmt.Println(condition.Xor(1, 1)) // false
+}
+```
+
+
+
+### <span id="Nor">Nor</span>
+<p>异或的取反操作</p>
+
+<b>函数签名:</b>
+
+```go
+func Nor[T, U any](a T, b U) bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/condition"
+)
+
+func main() {
+	fmt.Println(condition.Nor(0, 0)) // true
+	fmt.Println(condition.Nor(0, 1)) // false
+	fmt.Println(condition.Nor(1, 0)) // false
+	fmt.Println(condition.Nor(1, 1)) // true
+}
+```
+
+
+
+### <span id="Nand">Nand</span>
+<p>如果a和b都为真，返回false，否则返回true</p>
+
+<b>函数签名:</b>
+
+```go
+func Nand[T, U any](a T, b U) bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/condition"
+)
+
+func main() {
+	fmt.Println(condition.Nand(0, 0)) // true
+	fmt.Println(condition.Nand(0, 1)) // true
+	fmt.Println(condition.Nand(1, 0)) // true
+	fmt.Println(condition.Nand(1, 1)) // false
+}
+```
+
+
+
+### <span id="TernaryOperator">TernaryOperator</span>
+<p>三元运算符</p>
+
+<b>函数签名:</b>
+
+```go
+func TernaryOperator[T, U any](isTrue T, ifValue U, elseValue U) U
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/condition"
+)
+
+func main() {
+	trueValue := "1"
+	falseValue := "0"
+
+	fmt.Println(condition.TernaryOperator(true, trueValue, falseValue)) // "1"
+}
+```
+
+
+
+
+
+
--- a/docs/convertor.md
+++ b/docs/convertor.md
@@ -25,7 +25,6 @@ import (
 - [ToBytes](#ToBytes)
 - [ToChar](#ToChar)
 - [ToChannel](#ToChannel)
-
 - [ToFloat](#ToFloat)
 - [ToInt](#ToInt)
 - [ToJson](#ToJson)
@@ -34,6 +33,8 @@ import (
 - [ToString](#ToString)
 - [StructToMap](#StructToMap)
 - [MapToSlice](#MapToSlice)
+- [EncodeByte](#EncodeByte)
+- [DecodeByte](#DecodeByte)

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

@@ -393,6 +394,32 @@ func main() {
 ```


+### <span id="ToString">ToString</span>
+
+<p>ToString convert value to string, for number, string, []byte, will convert to string. For other type (slice, map, array, struct) will call json.Marshal</p>
+
+<b>Signature:</b>
+
+```go
+func ToString(value any) string
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/convertor"
+)
+
+func main() {
+    fmt.Printf("%q", convertor.ToString(1)) //"1"
+    fmt.Printf("%q", convertor.ToString(1.1)) //"1.1"
+    fmt.Printf("%q", convertor.ToString([]int{1, 2, 3})) //"[1,2,3]"
+}
+```
+

 ### <span id="StructToMap">StructToMap</span>

@@ -457,4 +484,59 @@ func main() {

    fmt.Println(result) //[]string{"a:1", "b:2", "c:3"}
 }
+```
+
+
+### <span id="EncodeByte">EncodeByte</span>
+
+<p>Encode data to byte slice.</p>
+
+<b>Signature:</b>
+
+```go
+func EncodeByte(data any) ([]byte, error)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/convertor"
+)
+
+func main() {
+    byteData, _ := convertor.EncodeByte("abc")
+    fmt.Println(byteData) //[]byte{6, 12, 0, 3, 97, 98, 99}
+}
+```
+
+
+
+### <span id="DecodeByte">DecodeByte</span>
+
+<p>Decode byte data to target object. target should be a pointer instance.</p>
+
+<b>Signature:</b>
+
+```go
+func DecodeByte(data []byte, target any) error
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/convertor"
+)
+
+func main() {
+    var result string
+	byteData := []byte{6, 12, 0, 3, 97, 98, 99}
+	convertor.DecodeByte(byteData, &result)
+    fmt.Println(result) //"abc"
+}
 ```
--- a/docs/convertor_zh-CN.md
+++ b/docs/convertor_zh-CN.md
@@ -27,7 +27,6 @@ import (
 - [ToBytes](#ToBytes)
 - [ToChar](#ToChar)
 - [ToChannel](#ToChannel)
-
 - [ToFloat](#ToFloat)
 - [ToInt](#ToInt)
 - [ToJson](#ToJson)
@@ -36,6 +35,8 @@ import (
 - [ToString](#ToString)
 - [StructToMap](#StructToMap)
 - [MapToSlice](#MapToSlice)
+- [EncodeByte](#EncodeByte)
+- [DecodeByte](#DecodeByte)

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

@@ -399,7 +400,7 @@ func main() {

 ### <span id="ToString">ToString</span>

-<p>将interface转成字符串</p>
+<p>将值转换为字符串，对于数字、字符串、[]byte，将转换为字符串。 对于其他类型（切片、映射、数组、结构）将调用 json.Marshal</p>

 <b>函数签名:</b>

@@ -489,3 +490,59 @@ func main() {
    fmt.Println(result) //[]string{"a:1", "b:2", "c:3"}
 }
 ```
+
+
+
+### <span id="EncodeByte">EncodeByte</span>
+
+<p>将data编码成字节切片</p>
+
+<b>函数签名:</b>
+
+```go
+func EncodeByte(data any) ([]byte, error)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/convertor"
+)
+
+func main() {
+    byteData, _ := convertor.EncodeByte("abc")
+    fmt.Println(byteData) //[]byte{6, 12, 0, 3, 97, 98, 99}
+}
+```
+
+
+
+### <span id="DecodeByte">DecodeByte</span>
+
+<p>解码字节切片到目标对象，目标对象需要传入一个指针实例子</p>
+
+<b>函数签名:</b>
+
+```go
+func DecodeByte(data []byte, target any) error
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/convertor"
+)
+
+func main() {
+    var result string
+	byteData := []byte{6, 12, 0, 3, 97, 98, 99}
+	convertor.DecodeByte(byteData, &result)
+    fmt.Println(result) //"abc"
+}
+```
--- a/docs/cryptor.md
+++ b/docs/cryptor.md
@@ -47,7 +47,6 @@ import (
 - [HmacSha1](#HmacSha1)
 - [HmacSha256](#HmacSha256)
 - [HmacSha512](#HmacSha512)
-
 - [Md5String](#Md5String)
 - [Md5File](#Md5File)
 - [Sha1](#Sha1)
--- a/docs/cryptor_zh-CN.md
+++ b/docs/cryptor_zh-CN.md
@@ -33,7 +33,6 @@ import (
 - [AesOfbDecrypt](#AesOfbDecrypt)
 - [Base64StdEncode](#Base64StdEncode)
 - [Base64StdDecode](#Base64StdDecode)
-
 - [DesEcbEncrypt](#DesEcbEncrypt)
 - [DesEcbDecrypt](#DesEcbDecrypt)
 - [DesCbcEncrypt](#DesCbcEncrypt)
@@ -43,7 +42,6 @@ import (
 - [DesCfbDecrypt](#DesCfbDecrypt)
 - [DesOfbEncrypt](#DesOfbEncrypt)
 - [DesOfbDecrypt](#DesOfbDecrypt)
-
 - [HmacMd5](#HmacMd5)
 - [HmacSha1](#HmacSha1)
 - [HmacSha256](#HmacSha256)
--- a/docs/datastructure/hashmap.md
+++ b/docs/datastructure/hashmap.md
@@ -20,6 +20,7 @@ import (

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

+
 ## Index

 - [NewHashMap](#NewHashMap)
@@ -28,6 +29,9 @@ import (
 - [Put](#Put)
 - [Delete](#Delete)
 - [Contains](#Contains)
+- [Iterate](#Iterate)
+- [Keys](#Keys)
+- [Values](#Values)

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

@@ -106,8 +110,8 @@ import (
 )

 func main() {
-	hm := heap.NewHashMap()
-	val := hm.Get("a")
+    hm := heap.NewHashMap()
+    val := hm.Get("a")

    fmt.Println(val) //nil
 }
@@ -134,10 +138,10 @@ import (
 )

 func main() {
-	hm := heap.NewHashMap()
-	hm.Put("a", 1)
+    hm := heap.NewHashMap()
+    hm.Put("a", 1)

-	val := hm.Get("a")
+    val := hm.Get("a")
    fmt.Println(val) //1
 }
 ```
@@ -165,13 +169,13 @@ import (
 )

 func main() {
-	hm := heap.NewHashMap()
-	hm.Put("a", 1)
-	val := hm.Get("a")
+    hm := heap.NewHashMap()
+    hm.Put("a", 1)
+    val := hm.Get("a")
    fmt.Println(val) //1

-	hm.Delete("a")
-	val = hm.Get("a")
+    hm.Delete("a")
+    val = hm.Get("a")
    fmt.Println(val) //nil
 }
 ```
@@ -199,10 +203,112 @@ import (
 )

 func main() {
-	hm := heap.NewHashMap()
-	hm.Put("a", 1)
+    hm := heap.NewHashMap()
+    hm.Put("a", 1)

    fmt.Println(hm.Contains("a")) //true
    fmt.Println(hm.Contains("b")) //false
 }
 ```
+
+
+
+### <span id="Iterate">Iterate</span>
+
+<p>Executes iteratee funcation for every key and value pair of hashmap.</p>
+
+<b>Signature:</b>
+
+```go
+func (hm *HashMap) Iterate(iteratee func(key, value any))
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+
+func main() {
+    hm := heap.NewHashMap()
+    hm.Put("a", 1)
+    hm.Put("b", 2)
+    hm.Put("c", 3)
+
+    hm.Iterate(func(key, value any) {
+        fmt.Println(key)
+        fmt.Println(value)
+    })
+}
+```
+
+
+
+### <span id="Keys">Keys</span>
+
+<p>Return a slice of the hashmap's keys (random order).</p>
+
+<b>Signature:</b>
+
+```go
+func (hm *HashMap) Keys() []any
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+
+func main() {
+    hm := heap.NewHashMap()
+    hm.Put("a", 1)
+    hm.Put("b", 2)
+    hm.Put("c", 3)
+
+    keys := hm.Keys()
+    fmt.Println(keys) //[]interface{"a", "b", "c"}
+}
+```
+
+
+### <span id="Values">Values</span>
+
+<p>Return a slice of the hashmap's values (random order).</p>
+
+<b>Signature:</b>
+
+```go
+func (hm *HashMap) Values() []any
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+
+func main() {
+    hm := heap.NewHashMap()
+    hm.Put("a", 1)
+    hm.Put("b", 2)
+    hm.Put("c", 3)
+
+    values := hm.Values()
+    fmt.Println(values) //[]interface{2, 1, 3}
+}
+```
+
+
--- a/docs/datastructure/hashmap_zh-CN.md
+++ b/docs/datastructure/hashmap_zh-CN.md
@@ -22,17 +22,15 @@ import (

 ## 目录

- [HashMap](#hashmap)
-  - [源码](#源码)
-  - [用法](#用法)
-  - [目录](#目录)
-  - [API 文档](#api-文档)
-    - [<span id="NewHashMap">NewHashMap</span>](#newhashmap)
-    - [<span id="NewHashMapWithCapacity">NewHashMapWithCapacity</span>](#newhashmapwithcapacity)
-    - [<span id="Get">Get</span>](#get)
-    - [<span id="Put">Put</span>](#put)
-    - [<span id="Delete">Delete</span>](#delete)
-    - [<span id="Contains">Contains</span>](#contains)
+- [NewHashMap](#NewHashMap)
+- [NewHashMapWithCapacity](#NewHashMapWithCapacity)
+- [Get](#Get)
+- [Put](#Put)
+- [Delete](#Delete)
+- [Contains](#Contains)
+- [Iterate](#Iterate)
+- [Keys](#Keys)
+- [Values](#Values)

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

@@ -111,8 +109,8 @@ import (
 )

 func main() {
-	hm := heap.NewHashMap()
-	val := hm.Get("a")
+    hm := heap.NewHashMap()
+    val := hm.Get("a")

    fmt.Println(val) //nil
 }
@@ -139,10 +137,10 @@ import (
 )

 func main() {
-	hm := heap.NewHashMap()
-	hm.Put("a", 1)
+    hm := heap.NewHashMap()
+    hm.Put("a", 1)

-	val := hm.Get("a")
+    val := hm.Get("a")
    fmt.Println(val) //1
 }
 ```
@@ -168,13 +166,13 @@ import (
 )

 func main() {
-	hm := heap.NewHashMap()
-	hm.Put("a", 1)
-	val := hm.Get("a")
+    hm := heap.NewHashMap()
+    hm.Put("a", 1)
+    val := hm.Get("a")
    fmt.Println(val) //1

-	hm.Delete("a")
-	val = hm.Get("a")
+    hm.Delete("a")
+    val = hm.Get("a")
    fmt.Println(val) //nil
 }
 ```
@@ -200,10 +198,111 @@ import (
 )

 func main() {
-	hm := heap.NewHashMap()
-	hm.Put("a", 1)
+    hm := heap.NewHashMap()
+    hm.Put("a", 1)

    fmt.Println(hm.Contains("a")) //true
    fmt.Println(hm.Contains("b")) //false
 }
 ```
+
+
+### <span id="Iterate">Iterate</span>
+
+<p>迭代hashmap，对每个key和value执行iteratee函数</p>
+
+<b>函数签名:</b>
+
+```go
+func (hm *HashMap) Iterate(iteratee func(key, value any))
+```
+
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+
+func main() {
+    hm := heap.NewHashMap()
+    hm.Put("a", 1)
+    hm.Put("b", 2)
+    hm.Put("c", 3)
+
+    hm.Iterate(func(key, value any) {
+        fmt.Println(key)
+        fmt.Println(value)
+    })
+}
+```
+
+
+
+### <span id="Keys">Keys</span>
+
+<p>返回hashmap所有key的切片 (随机顺序)</p>
+
+<b>函数签名:</b>
+
+```go
+func (hm *HashMap) Keys() []any
+```
+
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+
+func main() {
+    hm := heap.NewHashMap()
+    hm.Put("a", 1)
+    hm.Put("b", 2)
+    hm.Put("c", 3)
+
+    keys := hm.Keys()
+    fmt.Println(keys) //[]interface{"a", "b", "c"}
+}
+```
+
+
+### <span id="Values">Values</span>
+
+<p>返回hashmap所有值的切片 (随机顺序).</p>
+
+<b>函数签名:</b>
+
+```go
+func (hm *HashMap) Values() []any
+```
+
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
+)
+
+func main() {
+    hm := heap.NewHashMap()
+    hm.Put("a", 1)
+    hm.Put("b", 2)
+    hm.Put("c", 3)
+
+    values := hm.Values()
+    fmt.Println(values) //[]interface{2, 1, 3}
+}
+```
+
+
--- a/docs/datastructure/linklist.md
+++ b/docs/datastructure/linklist.md
@@ -132,12 +132,12 @@ func main() {


 ### <span id="SinglyLink_InsertAt">InsertAt</span>
-<p>Insert value into singly linklist at index, index shoud be great or equal 0 and less or equal number of link nodes</p>
+<p>Insert value into singly linklist at index, param `index` should between [0, len(SinglyLink)], if index do not meet the conditions, do nothing</p>

 <b>Signature:</b>

 ```go
-func (link *SinglyLink[T]) InsertAt(index int, value T) error
+func (link *SinglyLink[T]) InsertAt(index int, value T)
 ```
 <b>Example:</b>

@@ -152,6 +152,8 @@ import (
 func main() {
    lk := link.NewSinglyLink[int]()

+    lk.InsertAt(1, 1) //do nothing
+    
    lk.InsertAt(0, 1)
    lk.InsertAt(1, 2)
    lk.InsertAt(2, 3)
@@ -228,12 +230,12 @@ func main() {


 ### <span id="SinglyLink_DeleteAt">DeleteAt</span>
-<p>Delete value at specific index, index shoud be great or equal 0 and less or less than number of link nodes - 1</p>
+<p>Delete value at specific index, param `index` should be [0, len(SinglyLink)-1]</p>

 <b>Signature:</b>

 ```go
-func (link *SinglyLink[T]) DeleteAt(index int) error
+func (link *SinglyLink[T]) DeleteAt(index int)
 ```
 <b>Example:</b>

@@ -253,9 +255,8 @@ func main() {
    lk.InsertAtTail(3)
    lk.InsertAtTail(4)

-    err := lk.DeleteAt(3)
+    lk.DeleteAt(3)

-    fmt.Println(err) //nil
    fmt.Println(lk.Values()) //[]int{1, 2, 3}
 }
 ```
@@ -268,7 +269,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func (link *SinglyLink[T]) DeleteAtHead() error
+func (link *SinglyLink[T]) DeleteAtHead()
 ```
 <b>Example:</b>

@@ -288,9 +289,8 @@ func main() {
    lk.InsertAtTail(3)
    lk.InsertAtTail(4)

-    err := lk.DeleteAtHead()
+    lk.DeleteAtHead()
    
-    fmt.Println(err) //nil
    fmt.Println(lk.Values()) //[]int{2, 3, 4}
 }
 ```
@@ -304,7 +304,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func (link *SinglyLink[T]) DeleteAtTail() error
+func (link *SinglyLink[T]) DeleteAtTail()
 ```
 <b>Example:</b>

@@ -323,9 +323,8 @@ func main() {
    lk.InsertAtTail(2)
    lk.InsertAtTail(3)

-    err := lk.DeleteAtTail()
+    lk.DeleteAtTail()
    
-    fmt.Println(err) //nil
    fmt.Println(lk.Values()) //[]int{1, 2}
 }
 ```
@@ -628,12 +627,12 @@ func main() {


 ### <span id="DoublyLink_InsertAt">InsertAt</span>
-<p>Insert value into doubly linklist at index, index shoud be great or equal 0 and less or equal number of link nodes</p>
+<p>Insert value into doubly linklist at index, param `index` should between [0, len(DoublyLink)], if index do not meet the conditions, do nothing</p>

 <b>Signature:</b>

 ```go
-func (link *DoublyLink[T]) InsertAt(index int, value T) error
+func (link *DoublyLink[T]) InsertAt(index int, value T)
 ```
 <b>Example:</b>

@@ -648,6 +647,8 @@ import (
 func main() {
    lk := link.NewDoublyLink[int]()

+    lk.InsertAt(1, 1) //do nothing
+
    lk.InsertAt(0, 1)
    lk.InsertAt(1, 2)
    lk.InsertAt(2, 3)
@@ -724,12 +725,12 @@ func main() {


 ### <span id="DoublyLink_DeleteAt">DeleteAt</span>
-<p>Delete value at specific index, index shoud be great or equal 0 and less or less than number of link nodes - 1</p>
+<p>Delete value at specific index, param `index` should be [0, len(DoublyLink)-1]</p>

 <b>Signature:</b>

 ```go
-func (link *DoublyLink[T]) DeleteAt(index int) error
+func (link *DoublyLink[T]) DeleteAt(index int)
 ```
 <b>Example:</b>

@@ -749,9 +750,8 @@ func main() {
    lk.InsertAtTail(3)
    lk.InsertAtTail(4)

-    err := lk.DeleteAt(3)
+    lk.DeleteAt(3)

-    fmt.Println(err) //nil
    fmt.Println(lk.Values()) //[]int{1, 2, 3}
 }
 ```
@@ -764,7 +764,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func (link *DoublyLink[T]) DeleteAtHead() error
+func (link *DoublyLink[T]) DeleteAtHead()
 ```
 <b>Example:</b>

@@ -784,9 +784,8 @@ func main() {
    lk.InsertAtTail(3)
    lk.InsertAtTail(4)

-    err := lk.DeleteAtHead()
+    lk.DeleteAtHead()
    
-    fmt.Println(err) //nil
    fmt.Println(lk.Values()) //[]int{2, 3, 4}
 }
 ```
--- a/docs/datastructure/linklist_zh-CN.md
+++ b/docs/datastructure/linklist_zh-CN.md
@@ -132,12 +132,12 @@ func main() {


 ### <span id="SinglyLink_InsertAt">InsertAt</span>
-<p>将值插入到索引处的链表中，索引应大于或等于 0 且小于或等于链表节点数</p>
+<p>将值插入到索引处的链表中，索引应大于或等于0且小于或等于链表节点数</p>

 <b>函数签名:</b>

 ```go
-func (link *SinglyLink[T]) InsertAt(index int, value T) error
+func (link *SinglyLink[T]) InsertAt(index int, value T)
 ```
 <b>例子:</b>

@@ -152,6 +152,8 @@ import (
 func main() {
    lk := link.NewSinglyLink[int]()

+    lk.InsertAt(1, 1) //do nothing
+
    lk.InsertAt(0, 1)
    lk.InsertAt(1, 2)
    lk.InsertAt(2, 3)
@@ -228,12 +230,12 @@ func main() {


 ### <span id="SinglyLink_DeleteAt">DeleteAt</span>
-<p>删除特定索引处的值，索引应大于或等于0且小于或等于链接节点数 - 1</p>
+<p>删除特定索引处的值，索引应大于或等于0且小于或等于链接节点数-1</p>

 <b>函数签名:</b>

 ```go
-func (link *SinglyLink[T]) DeleteAt(index int) error
+func (link *SinglyLink[T]) DeleteAt(index int)
 ```
 <b>例子:</b>

@@ -253,9 +255,8 @@ func main() {
    lk.InsertAtTail(3)
    lk.InsertAtTail(4)

-    err := lk.DeleteAt(3)
+    lk.DeleteAt(3)

-    fmt.Println(err) //nil
    fmt.Println(lk.Values()) //[]int{1, 2, 3}
 }
 ```
@@ -268,7 +269,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func (link *SinglyLink[T]) DeleteAtHead() error
+func (link *SinglyLink[T]) DeleteAtHead()
 ```
 <b>例子:</b>

@@ -288,9 +289,8 @@ func main() {
    lk.InsertAtTail(3)
    lk.InsertAtTail(4)

-    err := lk.DeleteAtHead()
+    lk.DeleteAtHead()
    
-    fmt.Println(err) //nil
    fmt.Println(lk.Values()) //[]int{2, 3, 4}
 }
 ```
@@ -304,7 +304,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func (link *SinglyLink[T]) DeleteAtTail() error
+func (link *SinglyLink[T]) DeleteAtTail()
 ```
 <b>例子:</b>

@@ -323,9 +323,8 @@ func main() {
    lk.InsertAtTail(2)
    lk.InsertAtTail(3)

-    err := lk.DeleteAtTail()
+    lk.DeleteAtTail()
    
-    fmt.Println(err) //nil
    fmt.Println(lk.Values()) //[]int{1, 2}
 }
 ```
@@ -628,12 +627,12 @@ func main() {


 ### <span id="DoublyLink_InsertAt">InsertAt</span>
-<p>将值插入到索引处的链表中，索引应大于或等于 0 且小于或等于链表节点数</p>
+<p>将值插入到索引处的链表中，索引应大于或等于0且小于或等于链表节点数</p>

 <b>函数签名:</b>

 ```go
-func (link *DoublyLink[T]) InsertAt(index int, value T) error
+func (link *DoublyLink[T]) InsertAt(index int, value T)
 ```
 <b>例子:</b>

@@ -648,6 +647,8 @@ import (
 func main() {
    lk := link.NewDoublyLink[int]()

+    lk.InsertAt(1, 1) //do nothing
+
    lk.InsertAt(0, 1)
    lk.InsertAt(1, 2)
    lk.InsertAt(2, 3)
@@ -724,12 +725,12 @@ func main() {


 ### <span id="DoublyLink_DeleteAt">DeleteAt</span>
-<p>删除特定索引处的值，索引应大于或等于0且小于或等于链接节点数 - 1</p>
+<p>删除特定索引处的值，索引应大于或等于0且小于或等于链接节点数-1</p>

 <b>函数签名:</b>

 ```go
-func (link *DoublyLink[T]) DeleteAt(index int) error
+func (link *DoublyLink[T]) DeleteAt(index int)
 ```
 <b>例子:</b>

@@ -749,9 +750,8 @@ func main() {
    lk.InsertAtTail(3)
    lk.InsertAtTail(4)

-    err := lk.DeleteAt(3)
+    lk.DeleteAt(3)

-    fmt.Println(err) //nil
    fmt.Println(lk.Values()) //[]int{1, 2, 3}
 }
 ```
@@ -764,7 +764,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func (link *DoublyLink[T]) DeleteAtHead() error
+func (link *DoublyLink[T]) DeleteAtHead()
 ```
 <b>例子:</b>

@@ -784,9 +784,8 @@ func main() {
    lk.InsertAtTail(3)
    lk.InsertAtTail(4)

-    err := lk.DeleteAtHead()
+    lk.DeleteAtHead()
    
-    fmt.Println(err) //nil
    fmt.Println(lk.Values()) //[]int{2, 3, 4}
 }
 ```
@@ -800,7 +799,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func (link *DoublyLink[T]) DeleteAtTail() error
+func (link *DoublyLink[T]) DeleteAtTail()
 ```
 <b>例子:</b>

@@ -819,9 +818,8 @@ func main() {
    lk.InsertAtTail(2)
    lk.InsertAtTail(3)

-    err := lk.DeleteAtTail()
+    lk.DeleteAtTail()
    
-    fmt.Println(err) //nil
    fmt.Println(lk.Values()) //[]int{1, 2}
 }
 ```
--- a/docs/datastructure/set.md
+++ b/docs/datastructure/set.md
@@ -22,8 +22,11 @@ import (
 ## Index

 - [NewSet](#NewSet)
+- [NewSetFromSlice](#NewSetFromSlice)
 - [Values](#Values)
 - [Add](#Add)
+- [AddIfNotExist](#AddIfNotExist)
+- [AddIfNotExistBy](#AddIfNotExistBy)
 - [Delete](#Delete)
 - [Contain](#Contain)
 - [ContainAll](#ContainAll)
@@ -34,7 +37,6 @@ import (
 - [IsEmpty](#IsEmpty)
 - [Union](#Union)
 - [Intersection](#Intersection)
-
 - [SymmetricDifference](#SymmetricDifference)
 - [Minus](#Minus)

@@ -45,13 +47,13 @@ import (
 ## Documentation

 ### <span id="NewSet">NewSet</span>
-<p>Make a Set instance</p>
+<p>Create a set instance</p>

 <b>Signature:</b>

 ```go
 type Set[T comparable] map[T]bool
-func NewSet[T comparable](values ...T) Set[T]
+func NewSet[T comparable](items ...T) Set[T]
 ```
 <b>Example:</b>

@@ -70,6 +72,30 @@ func main() {
 ```


+### <span id="NewSetFromSlice">NewSetFromSlice</span>
+<p>Create a set from slice</p>
+
+<b>Signature:</b>
+
+```go
+func NewSetFromSlice[T comparable](items []T) Set[T]
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    st := set.NewSetFromSlice([]int{1, 2, 2, 3})
+    fmt.Println(st.Values()) //1,2,3
+}
+```
+


 ### <span id="Values">Values</span>
@@ -100,12 +126,12 @@ func main() {


 ### <span id="Add">Add</span>
-<p>Add value to set</p>
+<p>Add items to set</p>

 <b>Signature:</b>

 ```go
-func (s Set[T]) Add(values ...T)
+func (s Set[T]) Add(items ...T)
 ```
 <b>Example:</b>

@@ -126,14 +152,83 @@ func main() {
 ```


-
-### <span id="Delete">Delete</span>
-<p>Delete value in set</p>
+### <span id="AddIfNotExist">AddIfNotExist</span>
+<p>AddIfNotExist checks if item exists in the set, it adds the item to set and returns true if it does not exist in the set, or else it does nothing and returns false.</p>

 <b>Signature:</b>

 ```go
-func (s Set[T]) Delete(values ...T)
+func (s Set[T]) AddIfNotExist(item T) bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    st := set.NewSet[int]()
+    st.Add(1, 2, 3)
+
+    r1 := st.AddIfNotExist(1)
+	r2 := st.AddIfNotExist(4)
+
+    fmt.Println(r1) // false
+    fmt.Println(r2) // true
+    fmt.Println(st.Values()) // 1,2,3,4
+}
+```
+
+
+### <span id="AddIfNotExistBy">AddIfNotExistBy</span>
+<p>AddIfNotExistBy checks if item exists in the set and pass the `checker` function it adds the item to set and returns true if it does not exists in the set and function `checker` returns true, or else it does nothing and returns false.</p>
+
+<b>Signature:</b>
+
+```go
+func (s Set[T]) AddIfNotExistBy(item T, checker func(element T) bool) bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    st := set.NewSet[int]()
+    st.Add(1, 2)
+
+	ok := st.AddIfNotExistBy(3, func(val int) bool {
+		return val%2 != 0
+	})
+    fmt.Println(ok) // true
+
+
+	notOk := st.AddIfNotExistBy(4, func(val int) bool {
+		return val%2 != 0
+	})
+    fmt.Println(notOk) // false
+    
+    fmt.Println(st.Values()) // 1, 2, 3
+}
+```
+
+
+### <span id="Delete">Delete</span>
+<p>Delete item in set</p>
+
+<b>Signature:</b>
+
+```go
+func (s Set[T]) Delete(items ...T)
 ```
 <b>Example:</b>

@@ -157,12 +252,12 @@ func main() {


 ### <span id="Contain">Contain</span>
-<p>Check if value is in set or not</p>
+<p>Check if item is in set or not</p>

 <b>Signature:</b>

 ```go
-func (s Set[T]) Contain(value T) bool
+func (s Set[T]) Contain(item T) bool
 ```
 <b>Example:</b>

@@ -309,7 +404,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func (s Set[T]) Iterate(fn func(value T))
+func (s Set[T]) Iterate(fn func(item T))
 ```
 <b>Example:</b>

@@ -324,8 +419,8 @@ import (
 func main() {
    set1 := set.NewSet(1, 2, 3)
    arr := []int{}
-    set.Iterate(func(value int) {
-        arr = append(arr, value)
+    set.Iterate(func(item int) {
+        arr = append(arr, item)
    })

    fmt.Println(arr) //1,2,3
--- a/docs/datastructure/set_zh-CN.md
+++ b/docs/datastructure/set_zh-CN.md
@@ -22,8 +22,11 @@ import (
 ## 目录

 - [NewSet](#NewSet)
+- [NewSetFromSlice](#NewSetFromSlice)
 - [Values](#Values)
 - [Add](#Add)
+- [AddIfNotExist](#AddIfNotExist)
+- [AddIfNotExistBy](#AddIfNotExistBy)
 - [Delete](#Delete)
 - [Contain](#Contain)
 - [ContainAll](#ContainAll)
@@ -34,7 +37,6 @@ import (
 - [IsEmpty](#IsEmpty)
 - [Union](#Union)
 - [Intersection](#Intersection)
-
 - [SymmetricDifference](#SymmetricDifference)
 - [Minus](#Minus)

@@ -51,7 +53,7 @@ import (

 ```go
 type Set[T comparable] map[T]bool
-func NewSet[T comparable](values ...T) Set[T]
+func NewSet[T comparable](items ...T) Set[T]
 ```
 <b>例子:</b>

@@ -71,6 +73,31 @@ func main() {



+### <span id="NewSetFromSlice">NewSetFromSlice</span>
+<p>基于切片创建集合</p>
+
+<b>函数签名:</b>
+
+```go
+func NewSetFromSlice[T comparable](items []T) Set[T]
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    st := set.NewSetFromSlice([]int{1, 2, 2, 3})
+    fmt.Println(st.Values()) //1,2,3
+}
+```
+
+

 ### <span id="Values">Values</span>
 <p>获取集合中所有元素的切片</p>
@@ -105,7 +132,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func (s Set[T]) Add(values ...T)
+func (s Set[T]) Add(items ...T)
 ```
 <b>例子:</b>

@@ -126,6 +153,76 @@ func main() {
 ```


+### <span id="AddIfNotExist">AddIfNotExist</span>
+<p>如果集合中不存在元素，则添加该元素返回true, 如果集合中存在元素, 不做任何操作，返回false</p>
+
+<b>函数签名:</b>
+
+```go
+func (s Set[T]) AddIfNotExist(item T) bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    st := set.NewSet[int]()
+    st.Add(1, 2, 3)
+
+    r1 := st.AddIfNotExist(1)
+	r2 := st.AddIfNotExist(4)
+
+    fmt.Println(r1) // false
+    fmt.Println(r2) // true
+    fmt.Println(st.Values()) // 1,2,3,4
+}
+```
+
+
+### <span id="AddIfNotExistBy">AddIfNotExistBy</span>
+<p>根据checker函数判断元素是否在集合中，如果集合中不存在元素且checker返回true，则添加该元素返回true, 否则不做任何操作，返回false</p>
+
+<b>函数签名:</b>
+
+```go
+func (s Set[T]) AddIfNotExistBy(item T, checker func(element T) bool) bool
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    set "github.com/duke-git/lancet/v2/datastructure/set"
+)
+
+func main() {
+    st := set.NewSet[int]()
+    st.Add(1, 2)
+
+	ok := st.AddIfNotExistBy(3, func(val int) bool {
+		return val%2 != 0
+	})
+    fmt.Println(ok) // true
+
+
+	notOk := st.AddIfNotExistBy(4, func(val int) bool {
+		return val%2 != 0
+	})
+    fmt.Println(notOk) // false
+    
+    fmt.Println(st.Values()) // 1, 2, 3
+}
+```
+
+

 ### <span id="Delete">Delete</span>
 <p>删除集合中元素</p>
@@ -133,7 +230,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func (s Set[T]) Delete(values ...T)
+func (s Set[T]) Delete(items ...T)
 ```
 <b>例子:</b>

@@ -162,7 +259,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func (s Set[T]) Contain(value T) bool
+func (s Set[T]) Contain(item T) bool
 ```
 <b>例子:</b>

@@ -309,7 +406,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func (s Set[T]) Iterate(fn func(value T))
+func (s Set[T]) Iterate(fn func(item T))
 ```
 <b>例子:</b>

@@ -324,8 +421,8 @@ import (
 func main() {
    set1 := set.NewSet(1, 2, 3)
    arr := []int{}
-    set.Iterate(func(value int) {
-        arr = append(arr, value)
+    set.Iterate(func(item int) {
+        arr = append(arr, item)
    })

    fmt.Println(arr) //1,2,3
@@ -420,9 +517,6 @@ func main() {
 ```


-
-
-
 ### <span id="SymmetricDifference">SymmetricDifference</span>
 <p>返回一个集合，其中元素在第一个集合或第二个集合中，且不同时存在于两个集合中</p>

--- a/docs/datastructure/tree.md
+++ b/docs/datastructure/tree.md
@@ -29,7 +29,6 @@ import (
 - [PreOrderTraverse](#BSTree_PreOrderTraverse)
 - [InOrderTraverse](#BSTree_InOrderTraverse)
 - [PostOrderTraverse](#BSTree_PostOrderTraverse)
-  
 - [LevelOrderTraverse](#BSTree_LevelOrderTraverse)
 - [Depth](#BSTree_Depth)
 - [HasSubTree](#BSTree_HasSubTree)
--- a/docs/datastructure/tree_zh-CN.md
+++ b/docs/datastructure/tree_zh-CN.md
@@ -29,7 +29,6 @@ import (
 - [PreOrderTraverse](#BSTree_PreOrderTraverse)
 - [InOrderTraverse](#BSTree_InOrderTraverse)
 - [PostOrderTraverse](#BSTree_PostOrderTraverse)
-  
 - [LevelOrderTraverse](#BSTree_LevelOrderTraverse)
 - [Depth](#BSTree_Depth)
 - [HasSubTree](#BSTree_HasSubTree)
--- a/docs/datetime.md
+++ b/docs/datetime.md
@@ -42,7 +42,6 @@ import (
 - [GetNightTimestamp](#GetNightTimestamp)
 - [FormatTimeToStr](#FormatTimeToStr)
 - [FormatStrToTime](#FormatStrToTime)
-
 - [NewUnixNow](#NewUnixNow)
 - [NewUnix](#NewUnix)
 - [NewFormat](#NewFormat)
@@ -251,7 +250,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func BeginOfWeek(t time.Time) time.Time
+func BeginOfWeek(t time.Time, beginFrom ...time.Weekday) time.Time
 ```
 <b>Example:</b>

@@ -414,7 +413,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func EndOfWeek(t time.Time) time.Time
+func EndOfWeek(t time.Time, endWith ...time.Weekday) time.Time
 ```
 <b>Example:</b>

--- a/docs/datetime_zh-CN.md
+++ b/docs/datetime_zh-CN.md
@@ -41,7 +41,6 @@ import (
 - [GetNightTimestamp](#GetNightTimestamp)
 - [FormatTimeToStr](#FormatTimeToStr)
 - [FormatStrToTime](#FormatStrToTime)
-
 - [NewUnixNow](#NewUnixNow)
 - [NewUnix](#NewUnix)
 - [NewFormat](#NewFormat)
@@ -243,12 +242,12 @@ func main() {


 ### <span id="BeginOfWeek">BeginOfWeek</span>
-<p>返回指定时间的星期开始时间</p>
+<p>返回指定时间的每周开始时间,默认开始时间星期日</p>

 <b>函数签名:</b>

 ```go
-func BeginOfWeek(t time.Time) time.Time
+func BeginOfWeek(t time.Time, beginFrom ...time.Weekday) time.Time
 ```
 <b>例子:</b>

@@ -406,12 +405,12 @@ func main() {


 ### <span id="EndOfWeek">EndOfWeek</span>
-<p>返回指定时间的星期结束时间</p>
+<p>返回指定时间的星期结束时间,默认结束时间星期六</p>

 <b>函数签名:</b>

 ```go
-func EndOfWeek(t time.Time) time.Time
+func EndOfWeek(t time.Time, endWith ...time.Weekday) time.Time
 ```
 <b>例子:</b>

--- a/docs/fileutil.md
+++ b/docs/fileutil.md
@@ -28,7 +28,6 @@ import (
 - [IsExist](#IsExist)
 - [IsLink](#IsLink)
 - [IsDir](#IsDir)
-
 - [ListFileNames](#ListFileNames)
 - [RemoveFile](#RemoveFile)
 - [ReadFileToString](#ReadFileToString)
--- a/docs/fileutil_zh-CN.md
+++ b/docs/fileutil_zh-CN.md
@@ -28,7 +28,6 @@ import (
 - [IsExist](#IsExist)
 - [IsLink](#IsLink)
 - [IsDir](#IsDir)
-
 - [ListFileNames](#ListFileNames)
 - [RemoveFile](#RemoveFile)
 - [ReadFileToString](#ReadFileToString)
--- a/docs/formatter.md
+++ b/docs/formatter.md
@@ -28,13 +28,12 @@ import (


 ### <span id="Comma">Comma</span>
-<p>Add comma to number by every 3 numbers from right. ahead by symbol char.
-Param should be number or numberic string.</p>
+<p>Add comma to a number value by every 3 numbers from right to left. ahead by symbol char. if value is a invalid number string like "aa", return empty string.</p>

 <b>Signature:</b>

 ```go
-func Comma(v any, symbol string) string
+func Comma[T constraints.Float | constraints.Integer | string](value T, symbol string) string
 ```
 <b>Example:</b>

--- a/docs/formatter_zh-CN.md
+++ b/docs/formatter_zh-CN.md
@@ -28,12 +28,12 @@ import (


 ### <span id="Comma">Comma</span>
-<p>用逗号每隔3位分割数字/字符串，签名添加符号。参数必须是数字或者可以转为数字的字符串</p>
+<p>用逗号每隔3位分割数字/字符串，支持前缀添加符号。参数value必须是数字或者可以转为数字的字符串, 否则返回空字符串</p>

 <b>函数签名:</b>

 ```go
-func Comma(v any, symbol string) string
+func Comma[T constraints.Float | constraints.Integer | string](value T, symbol string) string
 ```
 <b>例子:</b>

--- a/docs/function.md
+++ b/docs/function.md
@@ -26,6 +26,7 @@ import (
 - [Compose](#Compose)
 - [Debounced](#Debounced)
 - [Delay](#Delay)
+- [Pipeline](#Pipeline)
 - [Watcher](#Watcher)

 <div STYLE="page-break-after: always;"></div>
@@ -300,6 +301,43 @@ func main() {
 ```


+### <span id="Pipeline">Pipeline</span>
+
+<p>Pipeline takes a list of functions and returns a function whose param will be passed into
+the functions one by one.</p>
+
+<b>Signature:</b>
+
+```go
+func Pipeline[T any](funcs ...func(T) T) func(T) T
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/function"
+)
+
+func main() {
+    addOne := func(x int) int {
+		return x + 1
+	}
+	double := func(x int) int {
+		return 2 * x
+	}
+	square := func(x int) int {
+		return x * x
+	}
+
+	f := Pipeline(addOne, double, square)
+
+	fmt.Println(f(2)) //36
+}
+```
+

 ### <span id="Watcher">Watcher</span>

--- a/docs/function_zh-CN.md
+++ b/docs/function_zh-CN.md
@@ -26,6 +26,7 @@ import (
 - [Compose](#Compose)
 - [Debounced](#Debounced)
 - [Delay](#Delay)
+- [Pipeline](#Pipeline)
 - [Watcher](#Watcher)

 <div STYLE="page-break-after: always;"></div>
@@ -300,6 +301,44 @@ func main() {



+### <span id="Pipeline">Pipeline</span>
+
+<p>执行函数pipeline.</p>
+
+<b>函数签名:</b>
+
+```go
+func Pipeline[T any](funcs ...func(T) T) func(T) T
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/function"
+)
+
+func main() {
+    addOne := func(x int) int {
+		return x + 1
+	}
+	double := func(x int) int {
+		return 2 * x
+	}
+	square := func(x int) int {
+		return x * x
+	}
+
+	f := Pipeline(addOne, double, square)
+
+	fmt.Println(f(2)) //36
+}
+```
+
+
+
 ### <span id="Watcher">Watcher</span>

 <p>Watcher 用于记录代码执行时间。可以启动/停止/重置手表定时器。获取函数执行的时间。 </p>
--- a/docs/mathutil.md
+++ b/docs/mathutil.md
@@ -28,7 +28,6 @@ import (
 - [MaxBy](#MaxBy)
 - [Min](#Min)
 - [MinBy](#MaxBy)
-
 - [Percent](#Percent)
 - [RoundToFloat](#RoundToFloat)
 - [RoundToString](#RoundToString)
@@ -46,7 +45,7 @@ import (
 <b>Signature:</b>

 ```go
-func Average[T lancetconstraints.Number](numbers ...T) T
+func Average[T constraints.Integer | constraints.Float](numbers ...T) T
 ```
 <b>Example:</b>

@@ -158,7 +157,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func Max[T lancetconstraints.Number](numbers ...T) T
+func Max[T constraints.Integer | constraints.Float](numbers ...T) T
 ```
 <b>Example:</b>

@@ -224,7 +223,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func Min[T lancetconstraints.Number](numbers ...T) T
+func Min[T constraints.Integer | constraints.Float](numbers ...T) T
 ```
 <b>Example:</b>

--- a/docs/mathutil_zh-CN.md
+++ b/docs/mathutil_zh-CN.md
@@ -28,7 +28,6 @@ import (
 - [MaxBy](#MaxBy)
 - [Min](#Min)
 - [MinBy](#MaxBy)
-  
 - [Percent](#Percent)
 - [RoundToFloat](#RoundToFloat)
 - [RoundToString](#RoundToString)
@@ -45,7 +44,7 @@ import (
 <b>函数签名:</b>

 ```go
-func Average[T lancetconstraints.Number](numbers ...T) T
+func Average[T constraints.Integer | constraints.Float](numbers ...T) T
 ```
 <b>例子:</b>

@@ -155,7 +154,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func Max[T lancetconstraints.Number](numbers ...T) T
+func Max[T constraints.Integer | constraints.Float](numbers ...T) T
 ```
 <b>例子:</b>

@@ -221,7 +220,7 @@ func main() {
 <b>函数签名:</b>

 ```go
-func Min[T lancetconstraints.Number](numbers ...T) T
+func Min[T constraints.Integer | constraints.Float](numbers ...T) T
 ```
 <b>例子:</b>

--- a/docs/netutil.md
+++ b/docs/netutil.md
@@ -7,6 +7,8 @@ Package netutil contains functions to get net information and send http request.

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

 <div STYLE="page-break-after: always;"></div>
@@ -23,7 +25,6 @@ import (
 ## Index
 - [ConvertMapToQueryString](#ConvertMapToQueryString)
 - [EncodeUrl](#EncodeUrl)
-  
 - [GetInternalIp](#GetInternalIp)
 - [GetIps](#GetIps)
 - [GetMacAddrs](#GetMacAddrs)
@@ -31,11 +32,16 @@ import (
 - [GetRequestPublicIp](#GetRequestPublicIp)
 - [IsPublicIP](#IsPublicIP)
 - [IsInternalIP](#IsInternalIP)
- [HttpGet](#HttpGet)
- [HttpDelete](#HttpDelete)
- [HttpPost](#HttpPost)
- [HttpPut](#HttpPut)
- [HttpPatch](#HttpPatch)
+- [HttpRequest](#HttpRequest)
+- [HttpClient](#HttpClient)
+- [SendRequest](#SendRequest)
+- [DecodeResponse](#DecodeResponse)
+- [StructToUrlValues](#StructToUrlValues)
+- [HttpGet<sup>Deprecated</sup>](#HttpGet)
+- [HttpDelete<sup>Deprecated</sup>](#HttpDelete)
+- [HttpPost<sup>Deprecated</sup>](#HttpPost)
+- [HttpPut<sup>Deprecated</sup>](#HttpPut)
+- [HttpPatch<sup>Deprecated</sup>](#HttpPatch)
 - [ParseHttpResponse](#ParseHttpResponse)

 <div STYLE="page-break-after: always;"></div>
@@ -335,8 +341,232 @@ func main() {
 ```


+### <span id="HttpRequest">HttpRequest</span>
+<p>HttpRequest is a struct used to abstract HTTP request entity.</p>

-### <span id="HttpGet">HttpGet</span>
+<b>Signature:</b>
+
+```go
+type HttpRequest struct {
+	RawURL      string
+	Method      string
+	Headers     http.Header
+	QueryParams url.Values
+	FormData    url.Values
+	Body        []byte
+}
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+	"net"
+    "github.com/duke-git/lancet/v2/netutil"
+)
+
+func main() {
+	header := http.Header{}
+	header.Add("Content-Type", "multipart/form-data")
+
+	postData := url.Values{}
+	postData.Add("userId", "1")
+	postData.Add("title", "testItem")
+
+	request := &netutil.HttpRequest{
+		RawURL:   "https://jsonplaceholder.typicode.com/todos",
+		Method:   "POST",
+		Headers:  header,
+		FormData: postData,
+	}
+}
+```
+
+
+### <span id="HttpClient">HttpClient</span>
+<p>HttpClient is a struct used to send HTTP request. It can be instanced with some configurations or none config.</p>
+
+<b>Signature:</b>
+
+```go
+type HttpClient struct {
+	*http.Client
+	TLS     *tls.Config
+	Request *http.Request
+	Config  HttpClientConfig
+}
+
+type HttpClientConfig struct {
+	SSLEnabled       bool
+	TLSConfig        *tls.Config
+	Compressed       bool
+	HandshakeTimeout time.Duration
+	ResponseTimeout  time.Duration
+	Verbose          bool
+}
+
+func NewHttpClient() *HttpClient
+
+func NewHttpClientWithConfig(config *HttpClientConfig) *HttpClient
+
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+	"net"
+	"time"
+    "github.com/duke-git/lancet/v2/netutil"
+)
+
+func main() {
+	httpClientCfg := netutil.HttpClientConfig{
+		SSLEnabled: true,
+		HandshakeTimeout:10 * time.Second
+	}
+	httpClient := netutil.NewHttpClientWithConfig(&httpClientCfg)
+}
+```
+
+
+
+### <span id="SendRequest">SendRequest</span>
+<p>Use HttpClient to send HTTP request.</p>
+
+<b>Signature:</b>
+
+```go
+func (client *HttpClient) SendRequest(request *HttpRequest) (*http.Response, error)
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+	"net"
+	"time"
+    "github.com/duke-git/lancet/v2/netutil"
+)
+
+func main() {
+	request := &netutil.HttpRequest{
+		RawURL: "https://jsonplaceholder.typicode.com/todos/1",
+		Method: "GET",
+	}
+
+	httpClient := netutil.NewHttpClient()
+	resp, err := httpClient.SendRequest(request)
+	if err != nil || resp.StatusCode != 200 {
+		log.Fatal(err)
+	}
+
+	type Todo struct {
+		UserId    int    `json:"userId"`
+		Id        int    `json:"id"`
+		Title     string `json:"title"`
+		Completed bool   `json:"completed"`
+	}
+
+	var todo Todo
+	httpClient.DecodeResponse(resp, &todo)
+
+	fmt.Println(todo.Id) //1
+}
+```
+
+
+
+### <span id="DecodeResponse">DecodeResponse</span>
+<p>Decode http response into target object.</p>
+
+<b>Signature:</b>
+
+```go
+func (client *HttpClient) DecodeResponse(resp *http.Response, target any) error
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+	"net"
+	"time"
+    "github.com/duke-git/lancet/v2/netutil"
+)
+
+func main() {
+	request := &netutil.HttpRequest{
+		RawURL: "https://jsonplaceholder.typicode.com/todos/1",
+		Method: "GET",
+	}
+
+	httpClient := netutil.NewHttpClient()
+	resp, err := httpClient.SendRequest(request)
+	if err != nil || resp.StatusCode != 200 {
+		log.Fatal(err)
+	}
+
+	type Todo struct {
+		UserId    int    `json:"userId"`
+		Id        int    `json:"id"`
+		Title     string `json:"title"`
+		Completed bool   `json:"completed"`
+	}
+
+	var todo Todo
+	httpClient.DecodeResponse(resp, &todo)
+
+	fmt.Println(todo.Id) //1
+}
+```
+
+
+### <span id="StructToUrlValues">StructToUrlValues</span>
+<p>Convert struct to url values, only convert the field which is exported and has `json` tag.</p>
+
+<b>Signature:</b>
+
+```go
+func StructToUrlValues(targetStruct any) url.Values
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/netutil"
+)
+
+func main() {
+	type TodoQuery struct {
+		Id     int `json:"id"`
+		UserId int `json:"userId"`
+	}
+	todoQuery := TodoQuery{
+		Id:     1,
+		UserId: 2,
+	}
+	todoValues := netutil.StructToUrlValues(todoQuery)
+
+	fmt.Println(todoValues.Get("id")) //1
+	fmt.Println(todoValues.Get("userId")) //2
+}
+```
+
+
+
+### <span id="HttpGet">HttpGet (Deprecated: use SendRequest for replacement)</span>
 <p>Send http get request.</p>

 <b>Signature:</b>
@@ -378,7 +608,7 @@ func main() {



-### <span id="HttpPost">HttpPost</span>
+### <span id="HttpPost">HttpPost (Deprecated: use SendRequest for replacement)</span>
 <p>Send http post request.</p>

 <b>Signature:</b>
@@ -427,7 +657,7 @@ func main() {



-### <span id="HttpPut">HttpPut</span>
+### <span id="HttpPut">HttpPut (Deprecated: use SendRequest for replacement)</span>
 <p>Send http put request.</p>

 <b>Signature:</b>
@@ -477,7 +707,7 @@ func main() {



-### <span id="HttpDelete">HttpDelete</span>
+### <span id="HttpDelete">HttpDelete (Deprecated: use SendRequest for replacement)</span>
 <p>Send http delete request.</p>

 <b>Signature:</b>
@@ -516,7 +746,7 @@ func main() {



-### <span id="HttpPatch">HttpPatch</span>
+### <span id="HttpPatch">HttpPatch (Deprecated: use SendRequest for replacement)</span>
 <p>Send http patch request.</p>

 <b>Signature:</b>
--- a/docs/netutil_zh-CN.md
+++ b/docs/netutil_zh-CN.md
@@ -6,6 +6,9 @@ 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_client.go](https://github.com/duke-git/lancet/blob/main/netutil/http_client.go)
+
 - [https://github.com/duke-git/lancet/blob/main/netutil/http.go](https://github.com/duke-git/lancet/blob/main/netutil/http.go)

 <div STYLE="page-break-after: always;"></div>
@@ -27,14 +30,18 @@ import (
 - [GetMacAddrs](#GetMacAddrs)
 - [GetPublicIpInfo](#GetPublicIpInfo)
 - [GetRequestPublicIp](#GetRequestPublicIp)
-
 - [IsPublicIP](#IsPublicIP)
 - [IsInternalIP](#IsInternalIP)
- [HttpGet](#HttpGet)
- [HttpDelete](#HttpDelete)
- [HttpPost](#HttpPost)
- [HttpPut](#HttpPut)
- [HttpPatch](#HttpPatch)
+- [HttpRequest](#HttpRequest)
+- [HttpClient](#HttpClient)
+- [SendRequest](#SendRequest)
+- [DecodeResponse](#DecodeResponse)
+- [StructToUrlValues](#StructToUrlValues)
+- [HttpGet<sup>Deprecated</sup>](#HttpGet)
+- [HttpDelete<sup>Deprecated</sup>](#HttpDelete)
+- [HttpPost<sup>Deprecated</sup>](#HttpPost)
+- [HttpPut<sup>Deprecated</sup>](#HttpPut)
+- [HttpPatch<sup>Deprecated</sup>](#HttpPatch)
 - [ParseHttpResponse](#ParseHttpResponse)

 <div STYLE="page-break-after: always;"></div>
@@ -334,8 +341,232 @@ func main() {
 ```


+### <span id="HttpRequest">HttpRequest</span>
+<p>HttpRequest用于抽象HTTP请求实体的结构</p>

-### <span id="HttpGet">HttpGet</span>
+<b>函数签名:</b>
+
+```go
+type HttpRequest struct {
+	RawURL      string
+	Method      string
+	Headers     http.Header
+	QueryParams url.Values
+	FormData    url.Values
+	Body        []byte
+}
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+	"net"
+    "github.com/duke-git/lancet/v2/netutil"
+)
+
+func main() {
+	header := http.Header{}
+	header.Add("Content-Type", "multipart/form-data")
+
+	postData := url.Values{}
+	postData.Add("userId", "1")
+	postData.Add("title", "testItem")
+
+	request := &netutil.HttpRequest{
+		RawURL:   "https://jsonplaceholder.typicode.com/todos",
+		Method:   "POST",
+		Headers:  header,
+		FormData: postData,
+	}
+}
+```
+
+
+### <span id="HttpClient">HttpClient</span>
+<p>HttpClient是用于发送HTTP请求的结构体。它可以用一些配置参数或无配置实例化.</p>
+
+<b>函数签名:</b>
+
+```go
+type HttpClient struct {
+	*http.Client
+	TLS     *tls.Config
+	Request *http.Request
+	Config  HttpClientConfig
+}
+
+type HttpClientConfig struct {
+	SSLEnabled       bool
+	TLSConfig        *tls.Config
+	Compressed       bool
+	HandshakeTimeout time.Duration
+	ResponseTimeout  time.Duration
+	Verbose          bool
+}
+
+func NewHttpClient() *HttpClient
+
+func NewHttpClientWithConfig(config *HttpClientConfig) *HttpClient
+
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+	"net"
+	"time"
+    "github.com/duke-git/lancet/v2/netutil"
+)
+
+func main() {
+	httpClientCfg := netutil.HttpClientConfig{
+		SSLEnabled: true,
+		HandshakeTimeout:10 * time.Second
+	}
+	httpClient := netutil.NewHttpClientWithConfig(&httpClientCfg)
+}
+```
+
+
+
+### <span id="SendRequest">SendRequest</span>
+<p>HttpClient发送http请求</p>
+
+<b>函数签名:</b>
+
+```go
+func (client *HttpClient) SendRequest(request *HttpRequest) (*http.Response, error)
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+	"net"
+	"time"
+    "github.com/duke-git/lancet/v2/netutil"
+)
+
+func main() {
+	request := &netutil.HttpRequest{
+		RawURL: "https://jsonplaceholder.typicode.com/todos/1",
+		Method: "GET",
+	}
+
+	httpClient := netutil.NewHttpClient()
+	resp, err := httpClient.SendRequest(request)
+	if err != nil || resp.StatusCode != 200 {
+		log.Fatal(err)
+	}
+
+	type Todo struct {
+		UserId    int    `json:"userId"`
+		Id        int    `json:"id"`
+		Title     string `json:"title"`
+		Completed bool   `json:"completed"`
+	}
+
+	var todo Todo
+	httpClient.DecodeResponse(resp, &todo)
+
+	fmt.Println(todo.Id) //1
+}
+```
+
+
+
+### <span id="DecodeResponse">DecodeResponse</span>
+<p>解析http响应体到目标结构体</p>
+
+<b>函数签名:</b>
+
+```go
+func (client *HttpClient) DecodeResponse(resp *http.Response, target any) error
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+	"net"
+	"time"
+    "github.com/duke-git/lancet/v2/netutil"
+)
+
+func main() {
+	request := &netutil.HttpRequest{
+		RawURL: "https://jsonplaceholder.typicode.com/todos/1",
+		Method: "GET",
+	}
+
+	httpClient := netutil.NewHttpClient()
+	resp, err := httpClient.SendRequest(request)
+	if err != nil || resp.StatusCode != 200 {
+		log.Fatal(err)
+	}
+
+	type Todo struct {
+		UserId    int    `json:"userId"`
+		Id        int    `json:"id"`
+		Title     string `json:"title"`
+		Completed bool   `json:"completed"`
+	}
+
+	var todo Todo
+	httpClient.DecodeResponse(resp, &todo)
+
+	fmt.Println(todo.Id) //1
+}
+```
+
+
+### <span id="StructToUrlValues">StructToUrlValues</span>
+<p>将结构体转为url values, 仅转化结构体导出字段并且包含`json` tag.</p>
+
+<b>函数签名:</b>
+
+```go
+func StructToUrlValues(targetStruct any) url.Values
+```
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/netutil"
+)
+
+func main() {
+	type TodoQuery struct {
+		Id     int `json:"id"`
+		UserId int `json:"userId"`
+	}
+	todoQuery := TodoQuery{
+		Id:     1,
+		UserId: 2,
+	}
+	todoValues := netutil.StructToUrlValues(todoQuery)
+
+	fmt.Println(todoValues.Get("id")) //1
+	fmt.Println(todoValues.Get("userId")) //2
+}
+```
+
+
+
+### <span id="HttpGet">HttpGet (Deprecated: use SendRequest for replacement)</span>
 <p>发送http get请求</p>

 <b>函数签名:</b>
@@ -377,7 +608,7 @@ func main() {



-### <span id="HttpPost">HttpPost</span>
+### <span id="HttpPost">HttpPost (Deprecated: use SendRequest for replacement)</span>
 <p>发送http post请求</p>

 <b>函数签名:</b>
@@ -426,7 +657,7 @@ func main() {



-### <span id="HttpPut">HttpPut</span>
+### <span id="HttpPut">HttpPut (Deprecated: use SendRequest for replacement)</span>
 <p>发送http put请求</p>

 <b>函数签名:</b>
@@ -438,7 +669,7 @@ func main() {
 // params[3] http client，类型必须是http.Client
 func HttpPut(url string, params ...any) (*http.Response, error)
 ```
-<b>Example:</b>
+<b>例子:</b>

 ```go
 package main
@@ -476,7 +707,7 @@ func main() {



-### <span id="HttpDelete">HttpDelete</span>
+### <span id="HttpDelete">HttpDelete (Deprecated: use SendRequest for replacement)</span>
 <p>发送http delete请求</p>

 <b>函数签名:</b>
@@ -515,7 +746,7 @@ func main() {



-### <span id="HttpPatch">HttpPatch</span>
+### <span id="HttpPatch">HttpPatch (Deprecated: use SendRequest for replacement)</span>
 <p>发送http patch请求</p>

 <b>函数签名:</b>
--- a/docs/random.md
+++ b/docs/random.md
@@ -1,16 +1,17 @@
 # Random
+
 Package random implements some basic functions to generate random int and string.

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

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

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

 ## Usage:
+
 ```go
 import (
    "github.com/duke-git/lancet/v2/random"
@@ -20,17 +21,22 @@ import (
 <div STYLE="page-break-after: always;"></div>

 ## Index
- [RandBytes](#RandBytes)
- [RandInt](#RandInt)
- [RandString](#RandString)
- [UUIdV4](#UUIdV4)
+
+-   [RandBytes](#RandBytes)
+-   [RandInt](#RandInt)
+-   [RandString](#RandString)
+-   [RandUpper](#RandUpper)
+-   [RandLower](#RandLower)
+-   [RandNumeral](#RandNumeral)
+-   [RandNumeralOrLetter](#RandNumeralOrLetter)
+-   [UUIdV4](#UUIdV4)

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

 ## Documentation

-
 ### <span id="RandBytes">RandBytes</span>
+
 <p>Generate random byte slice.</p>

 <b>Signature:</b>
@@ -38,6 +44,7 @@ import (
 ```go
 func RandBytes(length int) []byte
 ```
+
 <b>Example:</b>

 ```go
@@ -54,8 +61,8 @@ func main() {
 }
 ```

-
 ### <span id="RandInt">RandInt</span>
+
 <p>Generate random int between min and max, may contain min, not max.</p>

 <b>Signature:</b>
@@ -63,6 +70,7 @@ func main() {
 ```go
 func RandInt(min, max int) int
 ```
+
 <b>Example:</b>

 ```go
@@ -79,16 +87,16 @@ func main() {
 }
 ```

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

-
-### <span id="RandString">RandInt</span>
-<p>Generate random given length string.</p>
+<p>Generate random given length string. only contains letter (a-zA-Z)</p>

 <b>Signature:</b>

 ```go
 func RandString(length int) string
 ```
+
 <b>Example:</b>

 ```go
@@ -101,14 +109,116 @@ import (

 func main() {
 	randStr := random.RandString(6)
-	fmt.Println(randStr)
+	fmt.Println(randStr) //pGWsze
 }
 ```

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

+<p>Generate a random upper case string</p>

+<b>Signature:</b>
+
+```go
+func RandUpper(length int) string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+	randStr := random.RandString(6)
+	fmt.Println(randStr) //PACWGF
+}
+```
+
+### <span id="RandLower">RandLower</span>
+
+<p>Generate a random lower case string</p>
+
+<b>Signature:</b>
+
+```go
+func RandLower(length int) string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+	randStr := random.RandLower(6)
+	fmt.Println(randStr) //siqbew
+}
+```
+
+### <span id="RandNumeral">RandNumeral</span>
+
+<p>Generate a random numeral string</p>
+
+<b>Signature:</b>
+
+```go
+func RandNumeral(length int) string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+	randStr := random.RandNumeral(6)
+	fmt.Println(randStr) //035172
+}
+```
+
+### <span id="RandNumeralOrLetter">RandNumeralOrLetter</span>
+
+<p>generate a random numeral or letter string</p>
+
+<b>Signature:</b>
+
+```go
+func RandNumeralOrLetter(length int) string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+	randStr := random.RandNumeralOrLetter(6)
+	fmt.Println(randStr) //0aW7cQ
+}
+```

 ### <span id="UUIdV4">UUIdV4</span>
+
 <p>Generate a random UUID of version 4 according to RFC 4122.</p>

 <b>Signature:</b>
@@ -116,6 +226,7 @@ func main() {
 ```go
 func UUIdV4() (string, error)
 ```
+
 <b>Example:</b>

 ```go
@@ -134,5 +245,3 @@ func main() {
 	fmt.Println(uuid)
 }
 ```
-
-
--- a/docs/random_zh-CN.md
+++ b/docs/random_zh-CN.md
@@ -1,16 +1,17 @@
 # Random
-random随机数生成器包，可以生成随机[]bytes, int, string。
+
+random 随机数生成器包，可以生成随机[]bytes, int, string。

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

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

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

 ## 用法:
+
 ```go
 import (
    "github.com/duke-git/lancet/v2/random"
@@ -20,18 +21,22 @@ import (
 <div STYLE="page-break-after: always;"></div>

 ## 目录
- [RandBytes](#RandBytes)
- [RandInt](#RandInt)
- [RandString](#RandString)
- [UUIdV4](#UUIdV4)

+-   [RandBytes](#RandBytes)
+-   [RandInt](#RandInt)
+-   [RandString](#RandString)
+-   [RandUpper](#RandUpper)
+-   [RandLower](#RandLower)
+-   [RandNumeral](#RandNumeral)
+-   [RandNumeralOrLetter](#RandNumeralOrLetter)
+-   [UUIdV4](#UUIdV4)

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

 ## 文档

-
 ### <span id="RandBytes">RandBytes</span>
+
 <p>生成随机字节切片</p>

 <b>函数签名:</b>
@@ -39,6 +44,7 @@ import (
 ```go
 func RandBytes(length int) []byte
 ```
+
 <b>例子:</b>

 ```go
@@ -55,8 +61,8 @@ func main() {
 }
 ```

-
 ### <span id="RandInt">RandInt</span>
+
 <p>生成随机int, 范围[min, max)</p>

 <b>函数签名:</b>
@@ -64,6 +70,7 @@ func main() {
 ```go
 func RandInt(min, max int) int
 ```
+
 <b>例子:</b>

 ```go
@@ -80,16 +87,16 @@ func main() {
 }
 ```

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

-
-### <span id="RandString">RandInt</span>
-<p>生成随机给定长度的随机字符串</p>
+<p>生成给定长度的随机字符串，只包含字母(a-zA-Z)</p>

 <b>函数签名:</b>

 ```go
 func RandString(length int) string
 ```
+
 <b>例子:</b>

 ```go
@@ -102,13 +109,116 @@ import (

 func main() {
 	randStr := random.RandString(6)
-	fmt.Println(randStr)
+	fmt.Println(randStr) //pGWsze
 }
 ```

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

+<p>生成给定长度的随机大写字母字符串</p>
+
+<b>函数签名:</b>
+
+```go
+func RandUpper(length int) string
+```
+
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+	randStr := random.RandString(6)
+	fmt.Println(randStr) //PACWGF
+}
+```
+
+### <span id="RandLower">RandLower</span>
+
+<p>生成给定长度的随机小写字母字符串</p>
+
+<b>函数签名:</b>
+
+```go
+func RandLower(length int) string
+```
+
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+	randStr := random.RandLower(6)
+	fmt.Println(randStr) //siqbew
+}
+```
+
+### <span id="RandNumeral">RandNumeral</span>
+
+<p>生成给定长度的随机数字字符串</p>
+
+<b>函数签名:</b>
+
+```go
+func RandNumeral(length int) string
+```
+
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+	randStr := random.RandNumeral(6)
+	fmt.Println(randStr) //035172
+}
+```
+
+### <span id="RandNumeralOrLetter">RandNumeralOrLetter</span>
+
+<p>生成给定长度的随机字符串（数字+字母)</p>
+
+<b>函数签名:</b>
+
+```go
+func RandNumeralOrLetter(length int) string
+```
+
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+	randStr := random.RandNumeralOrLetter(6)
+	fmt.Println(randStr) //0aW7cQ
+}
+```

 ### <span id="UUIdV4">UUIdV4</span>
+
 <p>生成UUID v4字符串</p>

 <b>函数签名:</b>
@@ -116,6 +226,7 @@ func main() {
 ```go
 func UUIdV4() (string, error)
 ```
+
 <b>例子:</b>

 ```go
@@ -134,5 +245,3 @@ func main() {
 	fmt.Println(uuid)
 }
 ```
-
-
--- a/docs/slice.md
+++ b/docs/slice.md
--- a/docs/slice_zh-CN.md
+++ b/docs/slice_zh-CN.md
--- a/docs/strutil.md
+++ b/docs/strutil.md
@@ -28,15 +28,16 @@ import (
 - [Capitalize](#Capitalize)
 - [IsString](#IsString)
 - [KebabCase](#KebabCase)
+- [UpperKebabCase](#UpperKebabCase)
 - [LowerFirst](#LowerFirst)
 - [UpperFirst](#UpperFirst)
 - [PadEnd](#PadEnd)
 - [PadStart](#PadStart)
 - [Reverse](#Reverse)
 - [SnakeCase](#SnakeCase)
+- [UpperSnakeCase](#UpperSnakeCase)
 - [SplitEx](#SplitEx)
 - [Wrap](#Wrap)
-  
 - [Unwrap](#Unwrap)
  

@@ -166,10 +167,8 @@ func main() {
 ```


-
-
 ### <span id="CamelCase">CamelCase</span>
-<p>Covert string to camelCase string.</p>
+<p>Coverts string to camelCase string, non letters and numbers will be ignored.</p>

 <b>Signature:</b>

@@ -196,6 +195,75 @@ func main() {

 	s4 := strutil.CamelCase("foo bar")
 	fmt.Println(s4) //fooBar
+
+	s4 := strutil.CamelCase("Foo-#1😄$_%^&*(1bar")
+	fmt.Println(s4) //foo11Bar
+
+}
+```
+
+
+### <span id="KebabCase">KebabCase</span>
+<p>KebabCase covert string to kebab-case, non letters and numbers will be ignored.</p>
+
+<b>Signature:</b>
+
+```go
+func KebabCase(s string) string
+```
+<b>Example:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/v2/strutil"
+)
+
+func main() {
+	s1 := strutil.KebabCase("Foo Bar-")
+	fmt.Println(s1) //foo-bar
+
+	s2 := strutil.KebabCase("foo_Bar")
+	fmt.Println(s2) //foo-bar
+
+	s3 := strutil.KebabCase("fooBar")
+	fmt.Println(s3) //foo-bar
+
+	s4 := strutil.KebabCase("__FOO_BAR__")
+	fmt.Println(s4) //foo-bar
+}
+```
+
+
+
+### <span id="UpperKebabCase">UpperKebabCase</span>
+<p>UpperKebabCase covert string to upper KEBAB-CASE, non letters and numbers will be ignored.</p>
+
+<b>Signature:</b>
+
+```go
+func KebabCase(s string) string
+```
+<b>Example:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/v2/strutil"
+)
+
+func main() {
+	s1 := strutil.UpperKebabCase("Foo Bar-")
+	fmt.Println(s1) //FOO-BAR
+
+	s2 := strutil.UpperKebabCase("foo_Bar")
+	fmt.Println(s2) //FOO-BAR
+
+	s3 := strutil.UpperKebabCase("fooBar")
+	fmt.Println(s3) //FOO-BAR
+
+	s4 := strutil.UpperKebabCase("__FOO_BAR__")
+	fmt.Println(s4) //FOO-BAR
 }
 ```

@@ -458,7 +526,7 @@ func main() {


 ### <span id="SnakeCase">SnakeCase</span>
-<p>Covert string to snake_case.</p>
+<p>Coverts string to snake_case, non letters and numbers will be ignored.</p>

 <b>Signature:</b>

@@ -484,14 +552,47 @@ func main() {
 	fmt.Println(s3) //foo_bar

 	s4 := strutil.SnakeCase("__FOO_BAR__")
-	fmt.Println(s4) //f_o_o_b_a_r
+	fmt.Println(s4) //foo_bar

-	s5 := strutil.SnakeCase("aBbc-s$@a&%_B.B^C")
-	fmt.Println(s5) //a_bbc_s_a_b_b_c
+	s5 := strutil.SnakeCase("Foo-#1😄$_%^&*(1bar")
+	fmt.Println(s5) //foo_1_1_bar
 }
 ```


+### <span id="UpperSnakeCase">UpperSnakeCase</span>
+<p>Coverts string to upper KEBAB-CASE, non letters and numbers will be ignored.</p>
+
+<b>Signature:</b>
+
+```go
+func SnakeCase(s string) string
+```
+<b>Example:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/v2/strutil"
+)
+
+func main() {
+	s1 := strutil.UpperSnakeCase("Foo Bar-")
+	fmt.Println(s1) //FOO_BAR
+
+	s2 := strutil.UpperSnakeCase("foo_Bar")
+	fmt.Println(s2) //FOO_BAR
+
+	s3 := strutil.UpperSnakeCase("fooBar")
+	fmt.Println(s3) //FOO_BAR
+
+	s4 := strutil.UpperSnakeCase("__FOO_BAR__")
+	fmt.Println(s4) //FOO_BAR
+
+	s5 := strutil.UpperSnakeCase("Foo-#1😄$_%^&*(1bar")
+	fmt.Println(s5) //FOO_1_1_BAR
+}
+```


 ### <span id="SplitEx">SplitEx</span>
--- a/docs/strutil_zh-CN.md
+++ b/docs/strutil_zh-CN.md
@@ -28,15 +28,16 @@ import (
 - [Capitalize](#Capitalize)
 - [IsString](#IsString)
 - [KebabCase](#KebabCase)
+- [UpperKebabCase](#UpperKebabCase)
 - [LowerFirst](#LowerFirst)
 - [UpperFirst](#UpperFirst)
 - [PadEnd](#PadEnd)
 - [PadStart](#PadStart)
 - [Reverse](#Reverse)
 - [SnakeCase](#SnakeCase)
+- [UpperSnakeCase](#UpperSnakeCase)
 - [SplitEx](#SplitEx)
 - [Wrap](#Wrap)
-  
 - [Unwrap](#Unwrap)
  

@@ -170,7 +171,7 @@ func main() {


 ### <span id="CamelCase">CamelCase</span>
-<p>将字符串转换为驼峰式字符串</p>
+<p>将字符串转换为驼峰式字符串, 非字母和数字会被忽略</p>

 <b>函数签名:</b>

@@ -197,6 +198,9 @@ func main() {

 	s4 := strutil.CamelCase("foo bar")
 	fmt.Println(s4) //fooBar
+
+	s4 := strutil.CamelCase("Foo-#1😄$_%^&*(1bar")
+	fmt.Println(s4) //foo11Bar
 }
 ```

@@ -262,7 +266,7 @@ func main() {


 ### <span id="KebabCase">KebabCase</span>
-<p>将字符串转换为kebab-case</p>
+<p>将字符串转换为kebab-case, 非字母和数字会被忽略</p>

 <b>函数签名:</b>

@@ -288,7 +292,40 @@ func main() {
 	fmt.Println(s3) //foo-bar

 	s4 := strutil.KebabCase("__FOO_BAR__")
-	fmt.Println(s4) //f-o-o-b-a-r
+	fmt.Println(s4) //foo-bar
+}
+```
+
+
+
+### <span id="UpperKebabCase">UpperKebabCase</span>
+<p>将字符串转换为大写KEBAB-CASE, 非字母和数字会被忽略</p>
+
+<b>函数签名:</b>
+
+```go
+func KebabCase(s string) string
+```
+<b>例子:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/v2/strutil"
+)
+
+func main() {
+	s1 := strutil.UpperKebabCase("Foo Bar-")
+	fmt.Println(s1) //FOO-BAR
+
+	s2 := strutil.UpperKebabCase("foo_Bar")
+	fmt.Println(s2) //FOO-BAR
+
+	s3 := strutil.UpperKebabCase("fooBar")
+	fmt.Println(s3) //FOO-BAR
+
+	s4 := strutil.UpperKebabCase("__FOO_BAR__")
+	fmt.Println(s4) //FOO-BAR
 }
 ```

@@ -459,7 +496,7 @@ func main() {


 ### <span id="SnakeCase">SnakeCase</span>
-<p>将字符串转换为snake_case形式</p>
+<p>将字符串转换为snake_case形式, 非字母和数字会被忽略</p>

 <b>函数签名:</b>

@@ -485,10 +522,45 @@ func main() {
 	fmt.Println(s3) //foo_bar

 	s4 := strutil.SnakeCase("__FOO_BAR__")
-	fmt.Println(s4) //f_o_o_b_a_r
+	fmt.Println(s4) //foo_bar

-	s5 := strutil.SnakeCase("aBbc-s$@a&%_B.B^C")
-	fmt.Println(s5) //a_bbc_s_a_b_b_c
+	s5 := strutil.SnakeCase("Foo-#1😄$_%^&*(1bar")
+	fmt.Println(s5) //foo_1_1_bar
+}
+```
+
+
+### <span id="UpperSnakeCase">UpperSnakeCase</span>
+<p>将字符串转换为大写SNAKE_CASE形式, 非字母和数字会被忽略</p>
+
+<b>函数签名:</b>
+
+```go
+func SnakeCase(s string) string
+```
+<b>例子:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/v2/strutil"
+)
+
+func main() {
+	s1 := strutil.UpperSnakeCase("Foo Bar-")
+	fmt.Println(s1) //FOO_BAR
+
+	s2 := strutil.UpperSnakeCase("foo_Bar")
+	fmt.Println(s2) //FOO_BAR
+
+	s3 := strutil.UpperSnakeCase("fooBar")
+	fmt.Println(s3) //FOO_BAR
+
+	s4 := strutil.UpperSnakeCase("__FOO_BAR__")
+	fmt.Println(s4) //FOO_BAR
+
+	s5 := strutil.UpperSnakeCase("Foo-#1😄$_%^&*(1bar")
+	fmt.Println(s5) //FOO_1_1_BAR
 }
 ```

--- a/docs/system.md
+++ b/docs/system.md
@@ -211,7 +211,7 @@ func main() {


 ### <span id="ExecCommand">CompareOsEnv</span>
-<p>Use shell /bin/bash -c(linux) or cmd (windows) to execute command.</p>
+<p>Execute shell command, return the stdout and stderr string of command, and error if error occur. param `command` is a complete command string, like, ls -a (linux), dir(windows), ping 127.0.0.1. In linux, use /bin/bash -c to execute command, In windows, use powershell.exe to execute command.</p>

 <b>Signature:</b>

@@ -227,10 +227,24 @@ import (
 )

 func main() {
-	out, errout, err := system.ExecCommand("ls")
-	fmt.Println(out)
-	fmt.Println(errout)
-	fmt.Println(err)
+	// linux or mac
+	stdout, stderr, err := system.ExecCommand("ls")
+	fmt.Println("std out: ", stdout)
+	fmt.Println("std err: ", stderr)
+	assert.Equal("", stderr)
+
+	// windows
+	stdout, stderr, err = system.ExecCommand("dir")
+	fmt.Println("std out: ", stdout)
+	fmt.Println("std err: ", stderr)
+
+	// error command
+	stdout, stderr, err = system.ExecCommand("abc")
+	fmt.Println("std out: ", stdout)
+	fmt.Println("std err: ", stderr)
+	if err != nil {
+		fmt.Println(err.Error())
+	}
 }
 ```

--- a/docs/system_zh-CN.md
+++ b/docs/system_zh-CN.md
@@ -212,7 +212,7 @@ func main() {


 ### <span id="ExecCommand">ExecCommand</span>
-<p>使用shell /bin/bash -c(linux) 或 cmd (windows) 执行shell命令</p>
+<p>执行shell命令，返回命令的stdout和stderr字符串，如果出现错误，则返回错误。参数`command`是一个完整的命令字符串，如ls-a（linux），dir（windows），ping 127.0.0.1。在linux中，使用/bin/bash-c执行命令，在windows中，使用powershell.exe执行命令。</p>

 <b>Signature:</b>

@@ -228,10 +228,24 @@ import (
 )

 func main() {
-	out, errout, err := system.ExecCommand("ls")
-	fmt.Println(out)
-	fmt.Println(errout)
-	fmt.Println(err)
+	// linux or mac
+	stdout, stderr, err := system.ExecCommand("ls")
+	fmt.Println("std out: ", stdout)
+	fmt.Println("std err: ", stderr)
+	assert.Equal("", stderr)
+
+	// windows
+	stdout, stderr, err = system.ExecCommand("dir")
+	fmt.Println("std out: ", stdout)
+	fmt.Println("std err: ", stderr)
+
+	// error command
+	stdout, stderr, err = system.ExecCommand("abc")
+	fmt.Println("std out: ", stdout)
+	fmt.Println("std err: ", stderr)
+	if err != nil {
+		fmt.Println(err.Error())
+	}
 }
 ```

--- a/docs/validator.md
+++ b/docs/validator.md
@@ -34,7 +34,6 @@ import (
 - [IsCreditCard](#IsCreditCard)
 - [IsDns](#IsDns)
 - [IsEmail](#IsEmail)
-  
 - [IsEmptyString](#IsEmptyString)
 - [IsFloatStr](#IsFloatStr)
 - [IsNumberStr](#IsNumberStr)
@@ -47,6 +46,8 @@ import (
 - [IsStrongPassword](#IsStrongPassword)
 - [IsUrl](#IsUrl)
 - [IsWeakPassword](#IsWeakPassword)
+- [IsZeroValue](#IsZeroValue)
+- [IsGBK](#IsGBK)
  

 <div STYLE="page-break-after: always;"></div>
@@ -765,7 +766,7 @@ func main() {


 ### <span id="IsWeakPassword">IsWeakPassword</span>
-<p>Check if the string is weak password（only letter or only number or letter + number）
+<p>Checks if the string is weak password（only letter or only number or letter + number）
 .</p>

 <b>Signature:</b>
@@ -792,6 +793,63 @@ func main() {



+### <span id="IsZeroValue">IsZeroValue</span>
+<p>Checks if passed value is a zero value.</p>
+
+<b>Signature:</b>
+
+```go
+func IsZeroValue(value any) bool
+```
+<b>Example:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/v2/validator"
+)
+
+func main() {
+	fmt.Println(validator.IsZeroValue(nil)) //true
+	fmt.Println(validator.IsZeroValue(0)) //true
+	fmt.Println(validator.IsZeroValue("")) //true
+	fmt.Println(validator.IsZeroValue([]int)) //true
+	fmt.Println(validator.IsZeroValue(interface{})) //true
+
+	fmt.Println(validator.IsZeroValue("0")) //false
+	fmt.Println(validator.IsZeroValue("nil")) //false
+}
+```
+
+
+### <span id="IsGBK">IsGBK</span>
+<p>Checks if data encoding is gbk(Chinese character internal code extension specification). this function is implemented by whether double bytes fall within the encoding range of gbk,while each byte of utf-8 encoding format falls within the encoding range of gbk.Therefore, utf8.valid() should be called first to check whether it is not utf-8 encoding and then call IsGBK() to check gbk encoding. like the example.</p>
+
+<b>Signature:</b>
+
+```go
+func IsGBK(data []byte) bool
+```
+<b>Example:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/v2/validator"
+)
+
+func main() {
+	data := []byte("你好")
+	
+	// check utf8 first
+	if utf8.Valid(data) {
+		fmt.Println("data encoding is utf-8")
+	}else if(validator.IsGBK(data)) {
+		fmt.Println("data encoding is GBK")
+	}
+	fmt.Println("data encoding is unknown")
+}
+```



--- a/docs/validator_zh-CN.md
+++ b/docs/validator_zh-CN.md
@@ -34,7 +34,6 @@ import (
 - [IsCreditCard](#IsCreditCard)
 - [IsDns](#IsDns)
 - [IsEmail](#IsEmail)
-  
 - [IsEmptyString](#IsEmptyString)
 - [IsFloatStr](#IsFloatStr)
 - [IsNumberStr](#IsNumberStr)
@@ -47,6 +46,8 @@ import (
 - [IsStrongPassword](#IsStrongPassword)
 - [IsUrl](#IsUrl)
 - [IsWeakPassword](#IsWeakPassword)
+- [IsZeroValue](#IsZeroValue)
+- [IsGBK](#IsGBK)
  

 <div STYLE="page-break-after: always;"></div>
@@ -792,8 +793,59 @@ func main() {



+### <span id="IsZeroValue">IsZeroValue</span>
+<p>判断传入的参数值是否为零值</p>

+<b>函数签名:</b>

+```go
+func IsZeroValue(value any) bool
+```
+<b>例子:</b>

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

+func main() {
+	fmt.Println(validator.IsZeroValue(nil)) //true
+	fmt.Println(validator.IsZeroValue(0)) //true
+	fmt.Println(validator.IsZeroValue("")) //true
+	fmt.Println(validator.IsZeroValue([]int)) //true
+	fmt.Println(validator.IsZeroValue(interface{})) //true
+	
+	fmt.Println(validator.IsZeroValue("0")) //false
+	fmt.Println(validator.IsZeroValue("nil")) //false
+}
+```

+### <span id="IsGBK">IsGBK</span>
+<p>检查数据编码是否为gbk（汉字内部代码扩展规范）。该函数的实现取决于双字节是否在gbk的编码范围内，而utf-8编码格式的每个字节都在gbk编码范围内。因此，应该首先调用utf8.valid检查它是否是utf-8编码，然后调用IsGBK检查gbk编码。如示例所示。</p>
+
+<b>函数签名:</b>
+
+```go
+func IsGBK(data []byte) bool
+```
+<b>例子:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/v2/validator"
+)
+
+func main() {
+	data := []byte("你好")
+	
+	// 先检查utf8编码
+	if utf8.Valid(data) {
+		fmt.Println("data encoding is utf-8")
+	}else if(validator.IsGBK(data)) {
+		fmt.Println("data encoding is GBK")
+	}
+	fmt.Println("data encoding is unknown")
+}
+```
--- a/docs/xerror.md
+++ b/docs/xerror.md
@@ -46,7 +46,7 @@ import (
 )

 func main() {
-    _, err := strconv.Atoi("4o2")
+	_, err := strconv.Atoi("4o2")
 	defer func() {
 		v := recover()
 		fmt.Println(err.Error()) // err.Error() == v.(*strconv.NumError).Error()
--- a/docs/xerror_zh-CN.md
+++ b/docs/xerror_zh-CN.md
@@ -46,7 +46,7 @@ import (
 )

 func main() {
-    _, err := strconv.Atoi("4o2")
+	_, err := strconv.Atoi("4o2")
 	defer func() {
 		v := recover()
 		fmt.Println(err.Error()) // err.Error() == v.(*strconv.NumError).Error()
--- a/fileutil/file.go
+++ b/fileutil/file.go
@@ -8,9 +8,9 @@ import (
 	"archive/zip"
 	"bufio"
 	"errors"
+	"fmt"
 	"io"
 	"io/fs"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"path"
@@ -77,13 +77,16 @@ func CopyFile(srcFilePath string, dstFilePath string) error {
 	var tmp = make([]byte, 1024*4)
 	for {
 		n, err := srcFile.Read(tmp)
-		distFile.Write(tmp[:n])
 		if err != nil {
 			if err == io.EOF {
 				return nil
 			}
 			return err
 		}
+		_, err = distFile.Write(tmp[:n])
+		if err != nil {
+			return err
+		}
 	}
 }

@@ -101,7 +104,7 @@ func ClearFile(path string) error {

 //ReadFileToString return string of file content
 func ReadFileToString(path string) (string, error) {
-	bytes, err := ioutil.ReadFile(path)
+	bytes, err := os.ReadFile(path)
 	if err != nil {
 		return "", err
 	}
@@ -140,7 +143,7 @@ func ListFileNames(path string) ([]string, error) {
 		return []string{}, nil
 	}

-	fs, err := ioutil.ReadDir(path)
+	fs, err := os.ReadDir(path)
 	if err != nil {
 		return []string{}, err
 	}
@@ -171,7 +174,7 @@ func Zip(fpath string, destPath string) error {
 	archive := zip.NewWriter(zipFile)
 	defer archive.Close()

-	filepath.Walk(fpath, func(path string, info os.FileInfo, err error) error {
+	err = filepath.Walk(fpath, func(path string, info os.FileInfo, err error) error {
 		if err != nil {
 			return err
 		}
@@ -208,11 +211,16 @@ func Zip(fpath string, destPath string) error {
 		return nil
 	})

+	if err != nil {
+		return err
+	}
+
 	return nil
 }

 // UnZip unzip the file and save it to destPath
 func UnZip(zipFile string, destPath string) error {
+
 	zipReader, err := zip.OpenReader(zipFile)
 	if err != nil {
 		return err
@@ -220,11 +228,20 @@ func UnZip(zipFile string, destPath string) error {
 	defer zipReader.Close()

 	for _, f := range zipReader.File {
-		path := filepath.Join(destPath, f.Name)
+		//issue#62: fix ZipSlip bug
+		path, err := safeFilepathJoin(destPath, f.Name)
+		if err != nil {
+			return err
+		}
+
 		if f.FileInfo().IsDir() {
-			os.MkdirAll(path, os.ModePerm)
+			err = os.MkdirAll(path, os.ModePerm)
+			if err != nil {
+				return err
+			}
 		} else {
-			if err = os.MkdirAll(filepath.Dir(path), os.ModePerm); err != nil {
+			err = os.MkdirAll(filepath.Dir(path), os.ModePerm)
+			if err != nil {
 				return err
 			}

@@ -249,6 +266,17 @@ func UnZip(zipFile string, destPath string) error {
 	return nil
 }

+func safeFilepathJoin(path1, path2 string) (string, error) {
+	relPath, err := filepath.Rel(".", path2)
+	if err != nil || strings.HasPrefix(relPath, "..") {
+		return "", fmt.Errorf("(zipslip) filepath is unsafe %q: %v", path2, err)
+	}
+	if path1 == "" {
+		path1 = "."
+	}
+	return filepath.Join(path1, filepath.Join("/", relPath)), nil
+}
+
 // IsLink checks if a file is symbol link or not
 func IsLink(path string) bool {
 	fi, err := os.Lstat(path)
--- a/fileutil/file_test.go
+++ b/fileutil/file_test.go
@@ -25,9 +25,10 @@ func TestCreateFile(t *testing.T) {
 	f := "./text.txt"
 	if CreateFile(f) {
 		file, err := os.Open(f)
-		defer file.Close()
 		assert.IsNil(err)
 		assert.Equal(f, file.Name())
+
+		defer file.Close()
 	} else {
 		t.FailNow()
 	}
@@ -113,7 +114,11 @@ func TestReadFileToString(t *testing.T) {

 	f, _ := os.OpenFile(path, os.O_WRONLY|os.O_TRUNC, 0777)
 	defer f.Close()
-	f.WriteString("hello world")
+
+	_, err := f.WriteString("hello world")
+	if err != nil {
+		t.Log(err)
+	}

 	content, _ := ReadFileToString(path)
 	assert.Equal("hello world", content)
@@ -130,9 +135,12 @@ func TestClearFile(t *testing.T) {
 	f, _ := os.OpenFile(path, os.O_WRONLY|os.O_TRUNC, 0777)
 	defer f.Close()

-	f.WriteString("hello world")
+	_, err := f.WriteString("hello world")
+	if err != nil {
+		t.Log(err)
+	}

-	err := ClearFile(path)
+	err = ClearFile(path)
 	assert.IsNil(err)

 	content, _ := ReadFileToString(path)
@@ -148,8 +156,13 @@ func TestReadFileByLine(t *testing.T) {
 	CreateFile(path)

 	f, _ := os.OpenFile(path, os.O_WRONLY|os.O_TRUNC, 0777)
+
 	defer f.Close()
-	f.WriteString("hello\nworld")
+
+	_, err := f.WriteString("hello\nworld")
+	if err != nil {
+		t.Log(err)
+	}

 	expected := []string{"hello", "world"}
 	actual, _ := ReadFileByLine(path)
@@ -166,10 +179,14 @@ func TestZipAndUnZip(t *testing.T) {

 	file, _ := os.OpenFile(srcFile, os.O_WRONLY|os.O_TRUNC, 0777)
 	defer file.Close()
-	file.WriteString("hello\nworld")
+
+	_, err := file.WriteString("hello\nworld")
+	if err != nil {
+		t.Fail()
+	}

 	zipFile := "./text.zip"
-	err := Zip(srcFile, zipFile)
+	err = Zip(srcFile, zipFile)
 	assert.IsNil(err)

 	unZipPath := "./unzip"
--- a/formatter/formatter.go
+++ b/formatter/formatter.go
@@ -4,14 +4,25 @@
 // Package formatter implements some functions to format string, struct.
 package formatter

-import "strings"
+import (
+	"strings"
+
+	"golang.org/x/exp/constraints"
+)
+
+// Comma add comma to a number value by every 3 numbers from right. ahead by symbol char.
+// if value is invalid number string eg "aa", return empty string
+// Comma("12345", "$") => "$12,345", Comma(12345, "$") => "$12,345"
+func Comma[T constraints.Float | constraints.Integer | string](value T, symbol string) string {
+	s, err := numberToString(value)
+	if err != nil {
+		return ""
+	}

-// Comma add comma to number by every 3 numbers from right. ahead by symbol char
-func Comma(v any, symbol string) string {
-	s := numString(v)
 	dotIndex := strings.Index(s, ".")
 	if dotIndex != -1 {
 		return symbol + commaString(s[:dotIndex]) + s[dotIndex:]
 	}
+
 	return symbol + commaString(s)
 }
--- a/formatter/formatter_internal.go
+++ b/formatter/formatter_internal.go
@@ -14,27 +14,34 @@ func commaString(s string) string {
 	return commaString(s[:len(s)-3]) + "," + commaString(s[len(s)-3:])
 }

-func numString(value any) string {
+func numberToString(value any) (string, error) {
 	switch reflect.TypeOf(value).Kind() {
-	case reflect.Int, reflect.Int64, reflect.Float32, reflect.Float64:
-		return fmt.Sprintf("%v", value)
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
+		reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		return fmt.Sprintf("%v", value), nil
+
+		// todo: need to handle 12345678.9 => 1.23456789e+07
+	case reflect.Float32, reflect.Float64:
+		return fmt.Sprintf("%v", value), nil
+
 	case reflect.String:
 		{
 			sv := fmt.Sprintf("%v", value)
 			if strings.Contains(sv, ".") {
 				_, err := strconv.ParseFloat(sv, 64)
-				if err == nil {
-					return sv
+				if err != nil {
+					return "", err
 				}
+				return sv, nil
 			} else {
 				_, err := strconv.ParseInt(sv, 10, 64)
-				if err == nil {
-					return sv
+				if err != nil {
+					return "", nil
 				}
+				return sv, nil
 			}
 		}
 	default:
-		return ""
+		return "", nil
 	}
-	return ""
 }
--- a/formatter/formatter_test.go
+++ b/formatter/formatter_test.go
@@ -12,12 +12,16 @@ func TestComma(t *testing.T) {
 	assert.Equal("", Comma("", ""))
 	assert.Equal("", Comma("aa", ""))
 	assert.Equal("", Comma("aa.a", ""))
-	assert.Equal("", Comma([]int{1}, ""))
 	assert.Equal("123", Comma("123", ""))
 	assert.Equal("12,345", Comma("12345", ""))
+	assert.Equal("12,345.6789", Comma("12345.6789", ""))
+	assert.Equal("123,456,789,000", Comma("123456789000", ""))

 	assert.Equal("12,345", Comma(12345, ""))
 	assert.Equal("$12,345", Comma(12345, "$"))
 	assert.Equal("¥12,345", Comma(12345, "¥"))
 	assert.Equal("12,345.6789", Comma(12345.6789, ""))
+	assert.Equal("12,345.6789", Comma(+12345.6789, ""))
+	// assert.Equal("12,345,678.9", Comma(12345678.9, ""))
+	assert.Equal("123,456,789,000", Comma(123456789000, ""))
 }
--- a/function/function.go
+++ b/function/function.go
@@ -84,10 +84,8 @@ func Debounced(fn func(), duration time.Duration) func() {

 	go func() {
 		for {
-			select {
-			case <-timer.C:
-				go fn()
-			}
+			<-timer.C
+			go fn()
 		}
 	}()

@@ -113,3 +111,15 @@ func Schedule(d time.Duration, fn any, args ...any) chan bool {

 	return quit
 }
+
+// Pipeline takes a list of functions and returns a function whose param will be passed into
+// the functions one by one.
+func Pipeline[T any](funcs ...func(T) T) func(T) T {
+	return func(arg T) (result T) {
+		result = arg
+		for _, fn := range funcs {
+			result = fn(result)
+		}
+		return
+	}
+}
--- a/function/function_test.go
+++ b/function/function_test.go
@@ -134,3 +134,21 @@ func TestSchedule(t *testing.T) {
 	// expected := []string{"*", "*", "*", "*", "*"}
 	// assert.Equal(expected, res)
 }
+
+func TestPipeline(t *testing.T) {
+	assert := internal.NewAssert(t, "TestPipeline")
+
+	addOne := func(x int) int {
+		return x + 1
+	}
+	double := func(x int) int {
+		return 2 * x
+	}
+	square := func(x int) int {
+		return x * x
+	}
+
+	f := Pipeline(addOne, double, square)
+
+	assert.Equal(36, f(2))
+}
--- a/function/watcher_test.go
+++ b/function/watcher_test.go
@@ -29,9 +29,10 @@ func TestWatcher(t *testing.T) {
 	assert.Equal(int64(0), w.stopTime)
 }

-func longRunningTask() {
-	var slice []int64
+func longRunningTask() []int64 {
+	var data []int64
 	for i := 0; i < 10000000; i++ {
-		slice = append(slice, int64(i))
+		data = append(data, int64(i))
 	}
+	return data
 }
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,8 @@
 module github.com/duke-git/lancet/v2

 go 1.18
+
+require (
+	golang.org/x/exp v0.0.0-20221208152030-732eee02a75a
+	golang.org/x/text v0.5.0
+)
--- a/go.sum
+++ b/go.sum
@@ -0,0 +1,4 @@
+golang.org/x/exp v0.0.0-20221208152030-732eee02a75a h1:4iLhBPcpqFmylhnkbY3W0ONLUYYkDAW9xMFLfxgsvCw=
+golang.org/x/exp v0.0.0-20221208152030-732eee02a75a/go.mod h1:CxIveKay+FTh1D0yPZemJVgC/95VzuuOLq5Qi4xnoYc=
+golang.org/x/text v0.5.0 h1:OLmvp0KP+FVG99Ct/qFiL/Fhk4zp4QQnZ7b2U+5piUM=
+golang.org/x/text v0.5.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
--- a/iterator/iterator.go
+++ b/iterator/iterator.go
@@ -0,0 +1,173 @@
+// Copyright 2022 dudaodong@gmail.com. All rights resulterved.
+// Use of this source code is governed by MIT license
+
+// Package iterator provides a way to iterate over values stored in containers.
+// note:
+// 1. Full feature iterator is complicated, this package is just a experiment to explore how iterators could work in Go.
+// 2. The functionality of this package is very simple and limited, may not meet the actual dev needs.
+// 3. It is currently under development, unstable, and will not be completed for some time in the future.
+// So, based on above factors, you may not use it in production. but, anyone is welcome to improve it.
+// Hope that Go can support iterator in future. see https://github.com/golang/go/discussions/54245 and https://github.com/golang/go/discussions/56413
+package iterator
+
+import (
+	"golang.org/x/exp/constraints"
+)
+
+// Iterator supports iterating over a sequence of values of type `E`.
+type Iterator[T any] interface {
+	// Next checks if there is a next value in the iteration or not
+	HasNext() bool
+	// Next returns the next value in the iteration if there is one,
+	// and reports whether the returned value is valid.
+	// Once Next returns ok==false, the iteration is over,
+	// and all subsequent calls will return ok==false.
+	Next() (item T, ok bool)
+}
+
+// StopIterator is an  interface for stopping Iterator.
+type StopIterator[T any] interface {
+	Iterator[T]
+
+	// Stop indicates that the iterator will no longer be used.
+	// After a call to Stop, future calls to Next may panic.
+	// Stop may be called multiple times;
+	// all calls after the first will have no effect.
+	Stop()
+}
+
+// DeleteIter is an Iter that implements a Delete method.
+type DeleteIterator[T any] interface {
+	Iterator[T]
+
+	// Delete deletes the current iterator element;
+	// that is, the one returned by the last call to Next.
+	// Delete should panic if called before Next or after
+	// Next returns false.
+	Delete()
+}
+
+// SetIterator is an Iter that implements a Set method.
+type SetIterator[T any] interface {
+	Iterator[T]
+
+	// Set replaces the current iterator element with v.
+	// Set should panic if called before Next or after
+	// Next returns false.
+	Set(v T)
+}
+
+// PrevIterator is an iterator with a Prev method.
+type PrevIterator[T any] interface {
+	Iterator[T]
+
+	// Prev moves the iterator to the previous position.
+	// After calling Prev, Next will return the value at
+	// that position in the container. For example, after
+	//   it.Next() returning (v, true)
+	//   it.Prev()
+	// another call to it.Next will again return (v, true).
+	// Calling Prev before calling Next may panic.
+	// Calling Prev after Next returns false will move
+	// to the last element, or, if there are no elements,
+	// to the iterator's initial state.
+	Prev()
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// Functions that create an Iterator from some other type.                                       //
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+// FromSlice returns an iterator over a slice of data.
+func FromSlice[T any](slice []T) Iterator[T] {
+	return &sliceIterator[T]{slice: slice, index: -1}
+}
+
+func ToSlice[T any](iter Iterator[T]) []T {
+	result := []T{}
+	for item, ok := iter.Next(); ok; item, ok = iter.Next() {
+		result = append(result, item)
+	}
+	return result
+}
+
+type sliceIterator[T any] struct {
+	slice []T
+	index int
+}
+
+func (iter *sliceIterator[T]) HasNext() bool {
+	return iter.index < len(iter.slice)-1
+}
+
+func (iter *sliceIterator[T]) Next() (T, bool) {
+	iter.index++
+	ok := iter.index >= 0 && iter.index < len(iter.slice)
+	var item T
+	if ok {
+		item = iter.slice[iter.index]
+	}
+	return item, ok
+
+	// if len(iter.slice) == 0 {
+	// 	var zero T
+	// 	return zero, false
+	// }
+	// iter.index++
+	// item := iter.slice[0]
+	// iter.slice = iter.slice[1:]
+	// return item, true
+}
+
+// Prev implements PrevIterator.
+func (iter *sliceIterator[T]) Prev() {
+	if iter.index == -1 {
+		panic("Next function should be called Prev")
+	}
+	if iter.HasNext() {
+		iter.index--
+	} else {
+		iter.index = len(iter.slice) - 1
+	}
+}
+
+// Set implements SetIterator.
+func (iter *sliceIterator[T]) Set(value T) {
+	if iter.index == -1 {
+		panic("Next function should be called Set")
+	}
+	if iter.index >= len(iter.slice) || len(iter.slice) == 0 {
+		panic("No element in current iterator")
+	}
+	iter.slice[iter.index] = value
+}
+
+// FromRange creates a iterator which returns the numeric range between start inclusive and end
+// exclusive by the step size. start should be less than end, step shoud be positive.
+func FromRange[T constraints.Integer | constraints.Float](start, end, step T) Iterator[T] {
+	if end < start {
+		panic("RangeIterator: start should be before end")
+	} else if step <= 0 {
+		panic("RangeIterator: step should be positive")
+	}
+
+	return &rangeIterator[T]{start: start, end: end, step: step}
+}
+
+type rangeIterator[T constraints.Integer | constraints.Float] struct {
+	start, end, step T
+}
+
+func (iter *rangeIterator[T]) HasNext() bool {
+	return iter.start < iter.end
+}
+
+func (iter *rangeIterator[T]) Next() (T, bool) {
+	if iter.start >= iter.end {
+		var zero T
+		return zero, false
+	}
+	num := iter.start
+	iter.start += iter.step
+	return num, true
+}
--- a/iterator/iterator_test.go
+++ b/iterator/iterator_test.go
@@ -0,0 +1,50 @@
+// Copyright 2022 dudaodong@gmail.com. All rights resulterved.
+// Use of this source code is governed by MIT license
+
+// Package iterator implements some feature of C++ STL iterators
+package iterator
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestSliceIterator(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSliceIterator")
+
+	// HashNext
+	t.Run("slice iterator HasNext: ", func(t *testing.T) {
+		iter1 := FromSlice([]int{1, 2, 3, 4})
+		for {
+			item, _ := iter1.Next()
+
+			if item == 4 {
+				assert.Equal(false, iter1.HasNext())
+				break
+			} else {
+				assert.Equal(true, iter1.HasNext())
+			}
+		}
+
+		iter2 := FromSlice([]int{})
+		assert.Equal(false, iter2.HasNext())
+	})
+
+	//Next
+	t.Run("slice iterator Next: ", func(t *testing.T) {
+		iter1 := FromSlice([]int{1, 2, 3, 4})
+		for i := 0; i < 4; i++ {
+			item, ok := iter1.Next()
+			if !ok {
+				break
+			}
+			assert.Equal(i+1, item)
+		}
+
+		iter2 := FromSlice([]int{})
+		_, ok := iter2.Next()
+		assert.Equal(false, ok)
+	})
+
+}
--- a/iterator/operation.go
+++ b/iterator/operation.go
@@ -0,0 +1,61 @@
+// Copyright 2022 dudaodong@gmail.com. All rights resulterved.
+// Use of this source code is governed by MIT license
+
+// Package iterator provides a way to iterate over values stored in containers.
+// note:
+// 1. Full feature iterator is complicated, this package is just a experiment to explore how iterators could work in Go.
+// 2. The functionality of this package is very simple and limited, may not meet the actual dev needs.
+// 3. It is currently under development, unstable, and will not be completed for some time in the future.
+// So, based on above factors, you may not use it in production. but, anyone is welcome to improve it.
+// Hope that Go can support iterator in future. see https://github.com/golang/go/discussions/54245 and https://github.com/golang/go/discussions/56413
+package iterator
+
+// Map creates a new iterator which applies a function to all items of input iterator.
+func Map[T any, U any](iter Iterator[T], iteratee func(item T) U) Iterator[U] {
+	return &mapIterator[T, U]{
+		iter:     iter,
+		iteratee: iteratee,
+	}
+}
+
+type mapIterator[T any, U any] struct {
+	iter     Iterator[T]
+	iteratee func(T) U
+}
+
+func (mr *mapIterator[T, U]) HasNext() bool {
+	return mr.iter.HasNext()
+}
+
+func (mr *mapIterator[T, U]) Next() (U, bool) {
+	var zero U
+	item, ok := mr.iter.Next()
+	if !ok {
+		return zero, false
+	}
+	return mr.iteratee(item), true
+}
+
+// Filter creates a new iterator that returns only the items that pass specified predicate function.
+func Filter[T any](iter Iterator[T], predicateFunc func(item T) bool) Iterator[T] {
+	return &filterIterator[T]{iter: iter, predicateFunc: predicateFunc}
+}
+
+type filterIterator[T any] struct {
+	iter          Iterator[T]
+	predicateFunc func(T) bool
+}
+
+func (fr *filterIterator[T]) Next() (T, bool) {
+	for item, ok := fr.iter.Next(); ok; item, ok = fr.iter.Next() {
+		if fr.predicateFunc(item) {
+			return item, true
+		}
+	}
+	var zero T
+	return zero, false
+}
+
+func (fr *filterIterator[T]) HasNext() bool {
+	return fr.iter.HasNext()
+}
--- a/lancetconstraints/constraints.go
+++ b/lancetconstraints/constraints.go
@@ -11,8 +11,3 @@ type Comparator interface {
 	// Descending order: should return 1 -> v1 < v2, 0 -> v1 = v2, -1 -> v1 > v2
 	Compare(v1, v2 any) int
 }
-
-// Number contains all types of number and uintptr, used for generics constraint
-type Number interface {
-	int | int8 | int16 | int32 | int64 | uint | uint8 | uint16 | uint32 | uint64 | uintptr | float32 | float64
-}
--- a/maputil/map.go
+++ b/maputil/map.go
@@ -85,7 +85,7 @@ func Intersect[K comparable, V any](maps ...map[K]V) map[K]V {
 		return m
 	}

-	reduceMaps := make([]map[K]V, 2, 2)
+	reduceMaps := make([]map[K]V, 2)
 	result = reducer(maps[0], maps[1])

 	for i := 2; i < len(maps); i++ {
--- a/mathutil/mathutil.go
+++ b/mathutil/mathutil.go
@@ -10,7 +10,7 @@ import (
 	"strconv"
 	"strings"

-	"github.com/duke-git/lancet/v2/lancetconstraints"
+	"golang.org/x/exp/constraints"
 )

 // Exponent calculate x^n
@@ -94,7 +94,7 @@ func TruncRound(x float64, n int) float64 {
 }

 // Max return max value of params
-func Max[T lancetconstraints.Number](numbers ...T) T {
+func Max[T constraints.Integer | constraints.Float](numbers ...T) T {
 	max := numbers[0]

 	for _, v := range numbers {
@@ -128,7 +128,7 @@ func MaxBy[T any](slice []T, comparator func(T, T) bool) T {
 }

 // Min return min value of params
-func Min[T lancetconstraints.Number](numbers ...T) T {
+func Min[T constraints.Integer | constraints.Float](numbers ...T) T {
 	min := numbers[0]

 	for _, v := range numbers {
@@ -161,8 +161,8 @@ func MinBy[T any](slice []T, comparator func(T, T) bool) T {
 	return min
 }

-// Average return average value of params
-func Average[T lancetconstraints.Number](numbers ...T) T {
+// Average return average value of numbers
+func Average[T constraints.Integer | constraints.Float](numbers ...T) T {
 	var sum T
 	n := T(len(numbers))

--- a/mathutil/mathutil_test.go
+++ b/mathutil/mathutil_test.go
@@ -87,6 +87,9 @@ func TestMax(t *testing.T) {
 	assert.Equal(Max(0, 0), 0)
 	assert.Equal(Max(1, 2, 3), 3)
 	assert.Equal(Max(1.2, 1.4, 1.1, 1.4), 1.4)
+
+	type Integer int
+	assert.Equal(Max(Integer(1), Integer(0)), Integer(1))
 }

 func TestMaxBy(t *testing.T) {
--- a/netutil/http_client.go
+++ b/netutil/http_client.go
@@ -0,0 +1,232 @@
+package netutil
+
+import (
+	"bytes"
+	"crypto/tls"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"reflect"
+	"regexp"
+	"strings"
+	"time"
+
+	"github.com/duke-git/lancet/v2/slice"
+)
+
+// HttpRequest struct is a composed http request
+type HttpRequest struct {
+	RawURL      string
+	Method      string
+	Headers     http.Header
+	QueryParams url.Values
+	FormData    url.Values
+	Body        []byte
+}
+
+// HttpClientConfig contains some configurations for http client
+type HttpClientConfig struct {
+	SSLEnabled       bool
+	TLSConfig        *tls.Config
+	Compressed       bool
+	HandshakeTimeout time.Duration
+	ResponseTimeout  time.Duration
+	Verbose          bool
+}
+
+// defaultHttpClientConfig defalut client config
+var defaultHttpClientConfig = &HttpClientConfig{
+	Compressed:       false,
+	HandshakeTimeout: 20 * time.Second,
+	ResponseTimeout:  40 * time.Second,
+}
+
+// HttpClient is used for sending http request
+type HttpClient struct {
+	*http.Client
+	TLS     *tls.Config
+	Request *http.Request
+	Config  HttpClientConfig
+}
+
+// NewHttpClient make a HttpClient instance
+func NewHttpClient() *HttpClient {
+	client := &HttpClient{
+		Client: &http.Client{
+			Transport: &http.Transport{
+				TLSHandshakeTimeout:   defaultHttpClientConfig.HandshakeTimeout,
+				ResponseHeaderTimeout: defaultHttpClientConfig.ResponseTimeout,
+				DisableCompression:    !defaultHttpClientConfig.Compressed,
+			},
+		},
+		Config: *defaultHttpClientConfig,
+	}
+
+	return client
+}
+
+// NewHttpClientWithConfig make a HttpClient instance with pass config
+func NewHttpClientWithConfig(config *HttpClientConfig) *HttpClient {
+	if config == nil {
+		config = defaultHttpClientConfig
+	}
+
+	client := &HttpClient{
+		Client: &http.Client{
+			Transport: &http.Transport{
+				TLSHandshakeTimeout:   config.HandshakeTimeout,
+				ResponseHeaderTimeout: config.ResponseTimeout,
+				DisableCompression:    !config.Compressed,
+			},
+		},
+		Config: *config,
+	}
+
+	if config.SSLEnabled {
+		client.TLS = config.TLSConfig
+	}
+
+	return client
+}
+
+// SendRequest send http request
+func (client *HttpClient) SendRequest(request *HttpRequest) (*http.Response, error) {
+	err := validateRequest(request)
+	if err != nil {
+		return nil, err
+	}
+
+	rawUrl := request.RawURL
+
+	req, err := http.NewRequest(request.Method, rawUrl, bytes.NewBuffer(request.Body))
+	if err != nil {
+		return nil, err
+	}
+
+	client.setTLS(rawUrl)
+	client.setHeader(req, request.Headers)
+
+	err = client.setQueryParam(req, rawUrl, request.QueryParams)
+	if err != nil {
+		return nil, err
+	}
+
+	if request.FormData != nil {
+		client.setFormData(req, request.FormData)
+	}
+
+	client.Request = req
+
+	resp, err := client.Client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp, nil
+}
+
+// DecodeResponse decode response into target object
+func (client *HttpClient) DecodeResponse(resp *http.Response, target any) error {
+	if resp == nil {
+		return errors.New("invalid target param")
+	}
+	defer resp.Body.Close()
+	return json.NewDecoder(resp.Body).Decode(target)
+}
+
+// setTLS set http client transport TLSClientConfig
+func (client *HttpClient) setTLS(rawUrl string) {
+	if strings.HasPrefix(rawUrl, "https") {
+		if transport, ok := client.Client.Transport.(*http.Transport); ok {
+			transport.TLSClientConfig = client.TLS
+		}
+	}
+}
+
+// setHeader set http rquest header
+func (client *HttpClient) setHeader(req *http.Request, headers http.Header) {
+	if headers == nil {
+		headers = make(http.Header)
+	}
+
+	if _, ok := headers["Accept"]; !ok {
+		headers["Accept"] = []string{"*/*"}
+	}
+	if _, ok := headers["Accept-Encoding"]; !ok && client.Config.Compressed {
+		headers["Accept-Encoding"] = []string{"deflate, gzip"}
+	}
+
+	req.Header = headers
+}
+
+// setQueryParam set http request query string param
+func (client *HttpClient) setQueryParam(req *http.Request, reqUrl string, queryParam url.Values) error {
+	if queryParam != nil {
+		if !strings.Contains(reqUrl, "?") {
+			reqUrl = reqUrl + "?" + queryParam.Encode()
+		} else {
+			reqUrl = reqUrl + "&" + queryParam.Encode()
+		}
+		u, err := url.Parse(reqUrl)
+		if err != nil {
+			return err
+		}
+		req.URL = u
+	}
+	return nil
+}
+
+func (client *HttpClient) setFormData(req *http.Request, values url.Values) {
+	formData := []byte(values.Encode())
+	req.Body = io.NopCloser(bytes.NewReader(formData))
+	req.ContentLength = int64(len(formData))
+}
+
+// validateRequest check if a request has url, and valid method.
+func validateRequest(req *HttpRequest) error {
+	if req.RawURL == "" {
+		return errors.New("invalid request url")
+	}
+
+	// common HTTP methods
+	methods := []string{"GET", "POST", "PUT", "DELETE", "PATCH",
+		"HEAD", "CONNECT", "OPTIONS", "TRACE"}
+
+	if !slice.Contain(methods, strings.ToUpper(req.Method)) {
+		return errors.New("invalid request method")
+	}
+
+	return nil
+}
+
+// StructToUrlValues convert struct to url valuse,
+// only convert the field which is exported and has `json` tag
+func StructToUrlValues(targetStruct any) url.Values {
+	rv := reflect.ValueOf(targetStruct)
+	rt := reflect.TypeOf(targetStruct)
+
+	if rt.Kind() == reflect.Ptr {
+		rt = rt.Elem()
+	}
+	if rt.Kind() != reflect.Struct {
+		panic(fmt.Errorf("data type %T not support, shuld be struct or pointer to struct", targetStruct))
+	}
+
+	result := url.Values{}
+
+	fieldNum := rt.NumField()
+	pattern := `^[A-Z]`
+	regex := regexp.MustCompile(pattern)
+	for i := 0; i < fieldNum; i++ {
+		name := rt.Field(i).Name
+		tag := rt.Field(i).Tag.Get("json")
+		if regex.MatchString(name) && tag != "" {
+			result.Add(tag, fmt.Sprintf("%v", rv.Field(i).Interface()))
+		}
+	}
+
+	return result
+}
--- a/netutil/http_client_test.go
+++ b/netutil/http_client_test.go
@@ -0,0 +1,98 @@
+package netutil
+
+import (
+	"io"
+	"log"
+	"net/http"
+	"net/url"
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestHttpClient_Get(t *testing.T) {
+	assert := internal.NewAssert(t, "TestHttpClient_Get")
+
+	request := &HttpRequest{
+		RawURL: "https://jsonplaceholder.typicode.com/todos/1",
+		Method: "GET",
+	}
+
+	httpClient := NewHttpClient()
+	resp, err := httpClient.SendRequest(request)
+	if err != nil || resp.StatusCode != 200 {
+		log.Fatal(err)
+	}
+
+	type Todo struct {
+		UserId    int    `json:"userId"`
+		Id        int    `json:"id"`
+		Title     string `json:"title"`
+		Completed bool   `json:"completed"`
+	}
+
+	var todo Todo
+	err = httpClient.DecodeResponse(resp, &todo)
+	if err != nil {
+		t.Log(err)
+	}
+
+	assert.Equal(1, todo.Id)
+}
+
+func TestHttpClent_Post(t *testing.T) {
+	header := http.Header{}
+	header.Add("Content-Type", "multipart/form-data")
+
+	postData := url.Values{}
+	postData.Add("userId", "1")
+	postData.Add("title", "testItem")
+
+	request := &HttpRequest{
+		RawURL:   "https://jsonplaceholder.typicode.com/todos",
+		Method:   "POST",
+		Headers:  header,
+		FormData: postData,
+	}
+
+	httpClient := NewHttpClient()
+	resp, err := httpClient.SendRequest(request)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	body, _ := io.ReadAll(resp.Body)
+	t.Log("response: ", resp.StatusCode, string(body))
+}
+
+func TestStructToUrlValues(t *testing.T) {
+	assert := internal.NewAssert(t, "TestStructToUrlValues")
+
+	type TodoQuery struct {
+		Id     int `json:"id"`
+		UserId int `json:"userId"`
+	}
+	todoQuery := TodoQuery{
+		Id:     1,
+		UserId: 1,
+	}
+	todoValues := StructToUrlValues(todoQuery)
+
+	assert.Equal("1", todoValues.Get("id"))
+	assert.Equal("1", todoValues.Get("userId"))
+
+	request := &HttpRequest{
+		RawURL:      "https://jsonplaceholder.typicode.com/todos",
+		Method:      "GET",
+		QueryParams: todoValues,
+	}
+
+	httpClient := NewHttpClient()
+	resp, err := httpClient.SendRequest(request)
+	if err != nil || resp.StatusCode != 200 {
+		log.Fatal(err)
+	}
+
+	body, _ := io.ReadAll(resp.Body)
+	t.Log("response: ", string(body))
+}
--- a/netutil/http_test.go
+++ b/netutil/http_test.go
@@ -2,8 +2,9 @@ package netutil

 import (
 	"encoding/json"
-	"io/ioutil"
+	"io"
 	"log"
+	"net/url"
 	"testing"

 	"github.com/duke-git/lancet/v2/internal"
@@ -20,7 +21,7 @@ func TestHttpGet(t *testing.T) {
 		log.Fatal(err)
 	}

-	body, _ := ioutil.ReadAll(resp.Body)
+	body, _ := io.ReadAll(resp.Body)
 	t.Log("response: ", resp.StatusCode, string(body))
 }

@@ -40,7 +41,7 @@ func TestHttpPost(t *testing.T) {
 	if err != nil {
 		log.Fatal(err)
 	}
-	body, _ := ioutil.ReadAll(resp.Body)
+	body, _ := io.ReadAll(resp.Body)
 	t.Log("response: ", resp.StatusCode, string(body))
 }

@@ -50,23 +51,20 @@ func TestHttpPostFormData(t *testing.T) {
 		// "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")

-	postData := make(map[string]string)
-	postData["userId"] = "1"
-	postData["title"] = "title"
+	postData := url.Values{}
+	postData.Add("userId", "1")
+	postData.Add("title", "TestToDo")
+
+	// postData := make(map[string]string)
+	// postData["userId"] = "1"
+	// postData["title"] = "title"

 	resp, err := HttpPost(apiUrl, header, postData, nil)
 	if err != nil {
 		log.Fatal(err)
 	}
-	body, _ := ioutil.ReadAll(resp.Body)
+	body, _ := io.ReadAll(resp.Body)
 	t.Log("response: ", resp.StatusCode, string(body))
 }

@@ -87,7 +85,7 @@ func TestHttpPut(t *testing.T) {
 	if err != nil {
 		log.Fatal(err)
 	}
-	body, _ := ioutil.ReadAll(resp.Body)
+	body, _ := io.ReadAll(resp.Body)
 	t.Log("response: ", resp.StatusCode, string(body))
 }

@@ -108,7 +106,7 @@ func TestHttpPatch(t *testing.T) {
 	if err != nil {
 		log.Fatal(err)
 	}
-	body, _ := ioutil.ReadAll(resp.Body)
+	body, _ := io.ReadAll(resp.Body)
 	t.Log("response: ", resp.StatusCode, string(body))
 }

@@ -118,7 +116,7 @@ func TestHttpDelete(t *testing.T) {
 	if err != nil {
 		log.Fatal(err)
 	}
-	body, _ := ioutil.ReadAll(resp.Body)
+	body, _ := io.ReadAll(resp.Body)
 	t.Log("response: ", resp.StatusCode, string(body))
 }

--- a/netutil/net.go
+++ b/netutil/net.go
@@ -2,7 +2,7 @@ package netutil

 import (
 	"encoding/json"
-	"io/ioutil"
+	"io"
 	"net"
 	"net/http"
 	"net/url"
@@ -55,7 +55,7 @@ func GetPublicIpInfo() (*PublicIpInfo, error) {
 	}
 	defer resp.Body.Close()

-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return nil, err
 	}
--- a/netutil/net_internal.go
+++ b/netutil/net_internal.go
@@ -3,7 +3,7 @@ package netutil
 import (
 	"bytes"
 	"errors"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/url"
 	"strings"
@@ -173,7 +173,7 @@ func setBodyByte(req *http.Request, body any) error {
 	if body != nil {
 		switch b := body.(type) {
 		case []byte:
-			req.Body = ioutil.NopCloser(bytes.NewReader(b))
+			req.Body = io.NopCloser(bytes.NewReader(b))
 			req.ContentLength = int64(len(b))
 		default:
 			return errors.New("body type should be []byte")
--- a/random/random.go
+++ b/random/random.go
@@ -12,18 +12,12 @@ import (
 	"time"
 )

-// RandString generate random string
-// see https://stackoverflow.com/questions/22892120/how-to-generate-a-random-string-of-a-fixed-length-in-go
-func RandString(length int) string {
-	const letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
-
-	b := make([]byte, length)
-	r := rand.New(rand.NewSource(time.Now().UnixNano()))
-	for i := range b {
-		b[i] = letters[r.Int63()%int64(len(letters))]
-	}
-	return string(b)
-}
+const (
+	NUMERAL       = "0123456789"
+	LOWER_LETTERS = "abcdefghijklmnopqrstuvwxyz"
+	UPPER_LETTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	LETTERS       = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+)

 // RandInt generate random int between min and max, maybe min,  not be max
 func RandInt(min, max int) int {
@@ -50,6 +44,41 @@ func RandBytes(length int) []byte {
 	return b
 }

+// RandString generate random string
+func RandString(length int) string {
+	return random(LETTERS, length)
+}
+
+// RandUpper generate a random upper case string
+func RandUpper(length int) string {
+	return random(UPPER_LETTERS, length)
+}
+
+// RandLower generate a random lower case string
+func RandLower(length int) string {
+	return random(LOWER_LETTERS, length)
+}
+
+// RandNumeral generate a random numeral string
+func RandNumeral(length int) string {
+	return random(NUMERAL, length)
+}
+
+// RandNumeralOrLetter generate a random numeral or letter string
+func RandNumeralOrLetter(length int) string {
+	return random(NUMERAL+LETTERS, length)
+}
+
+// random generate a random string based on given string range
+func random(s string, length int) string {
+	b := make([]byte, length)
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	for i := range b {
+		b[i] = s[r.Int63()%int64(len(s))]
+	}
+	return string(b)
+}
+
 // UUIdV4 generate a random UUID of version 4 according to RFC 4122
 func UUIdV4() (string, error) {
 	uuid := make([]byte, 16)
--- a/random/random_test.go
+++ b/random/random_test.go
@@ -19,6 +19,51 @@ func TestRandString(t *testing.T) {
 	assert.Equal(true, reg.MatchString(randStr))
 }

+func TestRandUpper(t *testing.T) {
+	pattern := `^[A-Z]+$`
+	reg := regexp.MustCompile(pattern)
+
+	randStr := RandUpper(6)
+
+	assert := internal.NewAssert(t, "TestRandUpper")
+	assert.Equal(6, len(randStr))
+	assert.Equal(true, reg.MatchString(randStr))
+}
+
+func TestRandLower(t *testing.T) {
+	pattern := `^[a-z]+$`
+	reg := regexp.MustCompile(pattern)
+
+	randStr := RandLower(6)
+
+	assert := internal.NewAssert(t, "TestRandLower")
+	assert.Equal(6, len(randStr))
+	assert.Equal(true, reg.MatchString(randStr))
+}
+
+func TestRandNumeral(t *testing.T) {
+	pattern := `^[0-9]+$`
+	reg := regexp.MustCompile(pattern)
+
+	randStr := RandNumeral(12)
+
+	assert := internal.NewAssert(t, "TestRandNumeral")
+	assert.Equal(12, len(randStr))
+	assert.Equal(true, reg.MatchString(randStr))
+}
+
+func TestRandNumeralOrLetter(t *testing.T) {
+	pattern := `^[0-9a-zA-Z]+$`
+	reg := regexp.MustCompile(pattern)
+
+	randStr := RandNumeralOrLetter(10)
+	t.Log(randStr)
+
+	assert := internal.NewAssert(t, "TestRandNumeralOrLetter")
+	assert.Equal(10, len(randStr))
+	assert.Equal(true, reg.MatchString(randStr))
+}
+
 func TestRandInt(t *testing.T) {
 	assert := internal.NewAssert(t, "TestRandInt")

--- a/slice/slice.go
+++ b/slice/slice.go
@@ -10,22 +10,31 @@ import (
 	"math/rand"
 	"reflect"
 	"sort"
+
+	"golang.org/x/exp/constraints"
 )

-// Contain check if the value is in the slice or not
-func Contain[T comparable](slice []T, value T) bool {
-	set := make(map[T]struct{}, len(slice))
-	for _, v := range slice {
-		set[v] = struct{}{}
+// Create a static variable to store the hash table.
+// This variable has the same lifetime as the entire program and can be shared by functions that are called more than once.
+var (
+	memoryHashMap     = make(map[string]map[any]int)
+	memoryHashCounter = make(map[string]int)
+)
+
+// Contain check if the target value is in the slice or not
+func Contain[T comparable](slice []T, target T) bool {
+	for _, item := range slice {
+		if item == target {
+			return true
+		}
 	}

-	_, ok := set[value]
-	return ok
+	return false
 }

-// ContainSubSlice check if the slice contain subslice or not
-func ContainSubSlice[T comparable](slice, subslice []T) bool {
-	for _, v := range subslice {
+// ContainSubSlice check if the slice contain a given subslice or not
+func ContainSubSlice[T comparable](slice, subSlice []T) bool {
+	for _, v := range subSlice {
 		if !Contain(slice, v) {
 			return false
 		}
@@ -34,47 +43,35 @@ func ContainSubSlice[T comparable](slice, subslice []T) bool {
 	return true
 }

-// Chunk creates an slice of elements split into groups the length of size.
+// Chunk creates a slice of elements split into groups the length of size
 func Chunk[T any](slice []T, size int) [][]T {
-	var result [][]T
+	result := [][]T{}

 	if len(slice) == 0 || size <= 0 {
 		return result
 	}

-	length := len(slice)
-	if size == 1 || size >= length {
-		for _, v := range slice {
-			var tmp []T
-			tmp = append(tmp, v)
-			result = append(result, tmp)
+	for _, item := range slice {
+		l := len(result)
+		if l == 0 || len(result[l-1]) == size {
+			result = append(result, []T{})
+			l++
 		}
-		return result
-	}

-	// divide slice equally
-	divideNum := length/size + 1
-	for i := 0; i < divideNum; i++ {
-		if i == divideNum-1 {
-			if len(slice[i*size:]) > 0 {
-				result = append(result, slice[i*size:])
-			}
-		} else {
-			result = append(result, slice[i*size:(i+1)*size])
-		}
+		result[l-1] = append(result[l-1], item)
 	}

 	return result
+
 }

 // Compact creates an slice with all falsey values removed. The values false, nil, 0, and "" are falsey
-func Compact[T any](slice []T) []T {
-	result := make([]T, 0, 0)
+func Compact[T comparable](slice []T) []T {
+	var zero T
+
+	result := []T{}
 	for _, v := range slice {
-		if !reflect.DeepEqual(v, nil) &&
-			!reflect.DeepEqual(v, false) &&
-			!reflect.DeepEqual(v, "") &&
-			!reflect.DeepEqual(v, 0) {
+		if v != zero {
 			result = append(result, v)
 		}
 	}
@@ -82,11 +79,11 @@ func Compact[T any](slice []T) []T {
 	return result
 }

-// Concat creates a new slice concatenating slice with any additional slices and/or values.
-func Concat[T any](slice []T, values ...[]T) []T {
+// Concat creates a new slice concatenating slice with any additional slices.
+func Concat[T any](slice []T, slices ...[]T) []T {
 	result := append([]T{}, slice...)

-	for _, v := range values {
+	for _, v := range slices {
 		result = append(result, v...)
 	}

@@ -95,7 +92,8 @@ func Concat[T any](slice []T, values ...[]T) []T {

 // Difference creates an slice of whose element in slice but not in comparedSlice
 func Difference[T comparable](slice, comparedSlice []T) []T {
-	var result []T
+	result := []T{}
+
 	for _, v := range slice {
 		if !Contain(comparedSlice, v) {
 			result = append(result, v)
@@ -112,7 +110,7 @@ func DifferenceBy[T comparable](slice []T, comparedSlice []T, iteratee func(inde
 	orginSliceAfterMap := Map(slice, iteratee)
 	comparedSliceAfterMap := Map(comparedSlice, iteratee)

-	result := make([]T, 0, 0)
+	result := make([]T, 0)
 	for i, v := range orginSliceAfterMap {
 		if !Contain(comparedSliceAfterMap, v) {
 			result = append(result, slice[i])
@@ -122,9 +120,9 @@ func DifferenceBy[T comparable](slice []T, comparedSlice []T, iteratee func(inde
 	return result
 }

-//DifferenceWith accepts comparator which is invoked to compare elements of slice to values. The order and references of result values are determined by the first slice. The comparator is invoked with two arguments: (arrVal, othVal).
-func DifferenceWith[T any](slice []T, comparedSlice []T, comparator func(value, otherValue T) bool) []T {
-	result := make([]T, 0, 0)
+// DifferenceWith accepts comparator which is invoked to compare elements of slice to values. The order and references of result values are determined by the first slice. The comparator is invoked with two arguments: (arrVal, othVal).
+func DifferenceWith[T any](slice []T, comparedSlice []T, comparator func(item1, item2 T) bool) []T {
+	result := make([]T, 0)

 	getIndex := func(arr []T, item T, comparison func(v1, v2 T) bool) int {
 		index := -1
@@ -168,9 +166,8 @@ func EqualWith[T, U any](slice1 []T, slice2 []U, comparator func(T, U) bool) boo
 		return false
 	}

-	for i, v1 := range slice1 {
-		v2 := slice2[i]
-		if !comparator(v1, v2) {
+	for i, v := range slice1 {
+		if !comparator(v, slice2[i]) {
 			return false
 		}
 	}
@@ -180,76 +177,68 @@ func EqualWith[T, U any](slice1 []T, slice2 []U, comparator func(T, U) bool) boo

 // Every return true if all of the values in the slice pass the predicate function.
 func Every[T any](slice []T, predicate func(index int, item T) bool) bool {
-	if predicate == nil {
-		panic("predicate func is missing")
-	}
-
-	var currentLength int
 	for i, v := range slice {
-		if predicate(i, v) {
-			currentLength++
+		if !predicate(i, v) {
+			return false
 		}
 	}

-	return currentLength == len(slice)
+	return true
 }

 // None return true if all the values in the slice mismatch the criteria
 func None[T any](slice []T, predicate func(index int, item T) bool) bool {
-	if predicate == nil {
-		panic("predicate func is missing")
-	}
-
-	var currentLength int
+	l := 0
 	for i, v := range slice {
 		if !predicate(i, v) {
-			currentLength++
+			l++
 		}
 	}

-	return currentLength == len(slice)
+	return l == len(slice)
 }

 // Some return true if any of the values in the list pass the predicate function.
 func Some[T any](slice []T, predicate func(index int, item T) bool) bool {
-	if predicate == nil {
-		panic("predicate func is missing")
-	}
-
 	for i, v := range slice {
 		if predicate(i, v) {
 			return true
 		}
 	}
+
 	return false
 }

 // Filter iterates over elements of slice, returning an slice of all elements pass the predicate function
 func Filter[T any](slice []T, predicate func(index int, item T) bool) []T {
-	if predicate == nil {
-		panic("predicate func is missing")
-	}
+	result := make([]T, 0)

-	result := make([]T, 0, 0)
 	for i, v := range slice {
 		if predicate(i, v) {
 			result = append(result, v)
 		}
 	}
+
 	return result
 }

-// Count iterates over elements of slice, returns a count of all matched elements
-func Count[T any](slice []T, predicate func(index int, item T) bool) int {
-	if predicate == nil {
-		panic("predicate func is missing")
+// Count returns the number of occurrences of the given item in the slice
+func Count[T comparable](slice []T, item T) int {
+	count := 0
+
+	for _, v := range slice {
+		if item == v {
+			count++
+		}
 	}

-	if len(slice) == 0 {
-		return 0
-	}
+	return count
+}
+
+// CountBy iterates over elements of slice with predicate function, returns the number of all matched elements
+func CountBy[T any](slice []T, predicate func(index int, item T) bool) int {
+	count := 0

-	var count int
 	for i, v := range slice {
 		if predicate(i, v) {
 			count++
@@ -261,10 +250,6 @@ func Count[T any](slice []T, predicate func(index int, item T) bool) int {

 // GroupBy iterate over elements of the slice, each element will be group by criteria, returns two slices
 func GroupBy[T any](slice []T, groupFn func(index int, item T) bool) ([]T, []T) {
-	if groupFn == nil {
-		panic("groupFn func is missing")
-	}
-
 	if len(slice) == 0 {
 		return make([]T, 0), make([]T, 0)
 	}
@@ -285,11 +270,7 @@ func GroupBy[T any](slice []T, groupFn func(index int, item T) bool) ([]T, []T)
 }

 // GroupWith return a map composed of keys generated from the resultults of running each element of slice thru iteratee.
-func GroupWith[T any, U comparable](slice []T, iteratee func(T) U) map[U][]T {
-	if iteratee == nil {
-		panic("iteratee func is missing")
-	}
-
+func GroupWith[T any, U comparable](slice []T, iteratee func(item T) U) map[U][]T {
 	result := make(map[U][]T)

 	for _, v := range slice {
@@ -306,15 +287,8 @@ func GroupWith[T any, U comparable](slice []T, iteratee func(T) U) map[U][]T {
 // Find iterates over elements of slice, returning the first one that passes a truth test on predicate function.
 // If return T is nil then no items matched the predicate func
 func Find[T any](slice []T, predicate func(index int, item T) bool) (*T, bool) {
-	if predicate == nil {
-		panic("predicate func is missing")
-	}
-
-	if len(slice) == 0 {
-		return nil, false
-	}
-
 	index := -1
+
 	for i, v := range slice {
 		if predicate(i, v) {
 			index = i
@@ -332,15 +306,8 @@ func Find[T any](slice []T, predicate func(index int, item T) bool) (*T, bool) {
 // FindLast iterates over elements of slice from end to begin, returning the first one that passes a truth test on predicate function.
 // If return T is nil then no items matched the predicate func
 func FindLast[T any](slice []T, predicate func(index int, item T) bool) (*T, bool) {
-	if predicate == nil {
-		panic("predicate func is missing")
-	}
-
-	if len(slice) == 0 {
-		return nil, false
-	}
-
 	index := -1
+
 	for i := len(slice) - 1; i >= 0; i-- {
 		if predicate(i, slice[i]) {
 			index = i
@@ -386,8 +353,11 @@ func Flatten(slice any) any {
 func FlattenDeep(slice any) any {
 	sv := sliceValue(slice)
 	st := sliceElemType(sv.Type())
+
 	tmp := reflect.MakeSlice(reflect.SliceOf(st), 0, 0)
+
 	result := flattenRecursive(sv, tmp)
+
 	return result.Interface()
 }

@@ -408,10 +378,6 @@ func flattenRecursive(value reflect.Value, result reflect.Value) reflect.Value {

 // ForEach iterates over elements of slice and invokes function for each element
 func ForEach[T any](slice []T, iteratee func(index int, item T)) {
-	if iteratee == nil {
-		panic("iteratee func is missing")
-	}
-
 	for i, v := range slice {
 		iteratee(i, v)
 	}
@@ -419,11 +385,8 @@ func ForEach[T any](slice []T, iteratee func(index int, item T)) {

 // Map creates an slice of values by running each element of slice thru iteratee function.
 func Map[T any, U any](slice []T, iteratee func(index int, item T) U) []U {
-	if iteratee == nil {
-		panic("iteratee func is missing")
-	}
-
 	result := make([]U, len(slice), cap(slice))
+
 	for i, v := range slice {
 		result[i] = iteratee(i, v)
 	}
@@ -433,17 +396,13 @@ func Map[T any, U any](slice []T, iteratee func(index int, item T) U) []U {

 // Reduce creates an slice of values by running each element of slice thru iteratee function.
 func Reduce[T any](slice []T, iteratee func(index int, item1, item2 T) T, initial T) T {
-	if iteratee == nil {
-		panic("iteratee func is missing")
-	}
-
 	if len(slice) == 0 {
 		return initial
 	}

 	result := iteratee(0, initial, slice[0])

-	tmp := make([]T, 2, 2)
+	tmp := make([]T, 2)
 	for i := 1; i < len(slice); i++ {
 		tmp[0] = result
 		tmp[1] = slice[i]
@@ -453,7 +412,39 @@ func Reduce[T any](slice []T, iteratee func(index int, item1, item2 T) T, initia
 	return result
 }

+// Replace returns a copy of the slice with the first n non-overlapping instances of old replaced by new
+func Replace[T comparable](slice []T, old T, new T, n int) []T {
+	result := make([]T, len(slice))
+	copy(result, slice)
+
+	for i := range result {
+		if result[i] == old && n != 0 {
+			result[i] = new
+			n--
+		}
+	}
+
+	return result
+}
+
+// ReplaceAll returns a copy of the slice with all non-overlapping instances of old replaced by new.
+func ReplaceAll[T comparable](slice []T, old T, new T) []T {
+	return Replace(slice, old, new, -1)
+}
+
+// Repeat creates a slice with length n whose elements are param `item`.
+func Repeat[T any](item T, n int) []T {
+	result := make([]T, n)
+
+	for i := range result {
+		result[i] = item
+	}
+
+	return result
+}
+
 // InterfaceSlice convert param to slice of interface.
+// This function is deprecated, use generics feature of go1.18+ for replacement
 func InterfaceSlice(slice any) []any {
 	sv := sliceValue(slice)
 	if sv.IsNil() {
@@ -469,35 +460,37 @@ func InterfaceSlice(slice any) []any {
 }

 // StringSlice convert param to slice of string.
+// This function is deprecated, use generics feature of go1.18+ for replacement
 func StringSlice(slice any) []string {
 	v := sliceValue(slice)

-	out := make([]string, v.Len())
+	result := make([]string, v.Len())
 	for i := 0; i < v.Len(); i++ {
 		v, ok := v.Index(i).Interface().(string)
 		if !ok {
 			panic("invalid element type")
 		}
-		out[i] = v
+		result[i] = v
 	}

-	return out
+	return result
 }

 // IntSlice convert param to slice of int.
+// This function is deprecated, use generics feature of go1.18+ for replacement
 func IntSlice(slice any) []int {
 	sv := sliceValue(slice)

-	out := make([]int, sv.Len())
+	result := make([]int, sv.Len())
 	for i := 0; i < sv.Len(); i++ {
 		v, ok := sv.Index(i).Interface().(int)
 		if !ok {
 			panic("invalid element type")
 		}
-		out[i] = v
+		result[i] = v
 	}

-	return out
+	return result
 }

 // DeleteAt delete the element of slice from start index to end index - 1.
@@ -522,7 +515,7 @@ func DeleteAt[T any](slice []T, start int, end ...int) []T {
 	}

 	if start == size-1 {
-		slice = append(slice[:start])
+		slice = slice[:start]
 	} else {
 		slice = append(slice[:start], slice[start+1:]...)
 	}
@@ -584,12 +577,8 @@ func UpdateAt[T any](slice []T, index int, value T) []T {

 // Unique remove duplicate elements in slice.
 func Unique[T comparable](slice []T) []T {
-	if len(slice) == 0 {
-		return []T{}
-	}
+	result := []T{}

-	// here no use map filter. if use it, the result slice element order is random, not same as origin slice
-	var result []T
 	for i := 0; i < len(slice); i++ {
 		v := slice[i]
 		skip := true
@@ -609,11 +598,8 @@ func Unique[T comparable](slice []T) []T {

 // UniqueBy call iteratee func with every item of slice, then remove duplicated.
 func UniqueBy[T comparable](slice []T, iteratee func(item T) T) []T {
-	if len(slice) == 0 {
-		return []T{}
-	}
+	result := []T{}

-	var result []T
 	for _, v := range slice {
 		val := iteratee(v)
 		result = append(result, val)
@@ -622,25 +608,53 @@ func UniqueBy[T comparable](slice []T, iteratee func(item T) T) []T {
 	return Unique(result)
 }

-// Union creates a slice of unique values, in order, from all given slices. using == for equality comparisons.
+// Union creates a slice of unique elements, in order, from all given slices.
 func Union[T comparable](slices ...[]T) []T {
-	if len(slices) == 0 {
-		return []T{}
-	}
-
-	// append all slices, then unique it
-	var allElements []T
+	result := []T{}
+	contain := map[T]struct{}{}

 	for _, slice := range slices {
-		for _, v := range slice {
-			allElements = append(allElements, v)
+		for _, item := range slice {
+			if _, ok := contain[item]; !ok {
+				contain[item] = struct{}{}
+				result = append(result, item)
+			}
 		}
 	}

-	return Unique(allElements)
+	return result
 }

-// Intersection creates a slice of unique values that included by all slices.
+// UnionBy is like Union, what's more it accepts iteratee which is invoked for each element of each slice
+func UnionBy[T any, V comparable](predicate func(item T) V, slices ...[]T) []T {
+	result := []T{}
+	contain := map[V]struct{}{}
+
+	for _, slice := range slices {
+		for _, item := range slice {
+			val := predicate(item)
+			if _, ok := contain[val]; !ok {
+				contain[val] = struct{}{}
+				result = append(result, item)
+			}
+		}
+	}
+
+	return result
+}
+
+// Merge all given slices into one slice
+func Merge[T any](slices ...[]T) []T {
+	result := make([]T, 0)
+
+	for _, v := range slices {
+		result = append(result, v...)
+	}
+
+	return result
+}
+
+// Intersection creates a slice of unique elements that included by all slices.
 func Intersection[T comparable](slices ...[]T) []T {
 	if len(slices) == 0 {
 		return []T{}
@@ -649,12 +663,10 @@ func Intersection[T comparable](slices ...[]T) []T {
 		return Unique(slices[0])
 	}

-	var result []T
-
 	reducer := func(sliceA, sliceB []T) []T {
 		hashMap := make(map[T]int)
-		for _, val := range sliceA {
-			hashMap[val] = 1
+		for _, v := range sliceA {
+			hashMap[v] = 1
 		}

 		out := make([]T, 0)
@@ -667,9 +679,9 @@ func Intersection[T comparable](slices ...[]T) []T {
 		return out
 	}

-	result = reducer(slices[0], slices[1])
+	result := reducer(slices[0], slices[1])

-	reduceSlice := make([][]T, 2, 2)
+	reduceSlice := make([][]T, 2)
 	for i := 2; i < len(slices); i++ {
 		reduceSlice[0] = result
 		reduceSlice[1] = slices[i]
@@ -722,9 +734,26 @@ func Shuffle[T any](slice []T) []T {
 	return result
 }

+// Sort sorts a slice of any ordered type(number or string), use quick sort algrithm.
+// default sort order is ascending (asc), if want descending order, set param `sortOrder` to `desc`
+func Sort[T constraints.Ordered](slice []T, sortOrder ...string) {
+	if len(sortOrder) > 0 && sortOrder[0] == "desc" {
+		quickSort(slice, 0, len(slice)-1, "desc")
+	} else {
+		quickSort(slice, 0, len(slice)-1, "asc")
+	}
+}
+
+// SortBy sorts the slice in ascending order as determined by the less function.
+// This sort is not guaranteed to be stable
+func SortBy[T any](slice []T, less func(a, b T) bool) {
+	quickSortBy(slice, 0, len(slice)-1, less)
+}
+
 // SortByField return sorted slice by field
-// Slice element should be struct, field type should be int, uint, string, or bool
+// slice element should be struct, field type should be int, uint, string, or bool
 // default sortType is ascending (asc), if descending order, set sortType to desc
+// This function is deprecated, use Sort and SortBy for replacement
 func SortByField(slice any, field string, sortType ...string) error {
 	sv := sliceValue(slice)
 	t := sv.Type().Elem()
@@ -794,39 +823,67 @@ func SortByField(slice any, field string, sortType ...string) error {
 	return nil
 }

-// Without creates a slice excluding all given values
-func Without[T comparable](slice []T, values ...T) []T {
-	if len(values) == 0 || len(slice) == 0 {
+// Without creates a slice excluding all given items
+func Without[T comparable](slice []T, items ...T) []T {
+	if len(items) == 0 || len(slice) == 0 {
 		return slice
 	}

-	out := make([]T, 0, len(slice))
+	result := make([]T, 0, len(slice))
 	for _, v := range slice {
-		if !Contain(values, v) {
-			out = append(out, v)
+		if !Contain(items, v) {
+			result = append(result, v)
 		}
 	}

-	return out
+	return result
 }

-// IndexOf returns the index at which the first occurrence of a value is found in a slice or return -1
-// if the value cannot be found.
-func IndexOf[T comparable](slice []T, value T) int {
-	for i, v := range slice {
-		if v == value {
-			return i
+// IndexOf returns the index at which the first occurrence of an item is found in a slice or return -1 if the item cannot be found.
+func IndexOf[T comparable](arr []T, val T) int {
+	limit := 10
+	// gets the hash value of the array as the key of the hash table.
+	key := fmt.Sprintf("%p", arr)
+	// determines whether the hash table is empty. If so, the hash table is created.
+	if memoryHashMap[key] == nil {
+		memoryHashMap[key] = make(map[any]int)
+		// iterate through the array, adding the value and index of each element to the hash table.
+		for i := len(arr) - 1; i >= 0; i-- {
+			memoryHashMap[key][arr[i]] = i
 		}
 	}
+	// update the hash table counter.
+	memoryHashCounter[key]++

+	// use the hash table to find the specified value. If found, the index is returned.
+	if index, ok := memoryHashMap[key][val]; ok {
+		// calculate the memory usage of the hash table.
+		size := len(memoryHashMap)
+		// If the memory usage of the hash table exceeds the memory limit, the hash table with the lowest counter is cleared.
+		if size > limit {
+			var minKey string
+			var minVal int
+			for k, v := range memoryHashCounter {
+				if k == key {
+					continue
+				}
+				if minVal == 0 || v < minVal {
+					minKey = k
+					minVal = v
+				}
+			}
+			delete(memoryHashMap, minKey)
+			delete(memoryHashCounter, minKey)
+		}
+		return index
+	}
 	return -1
 }

-// LastIndexOf returns the index at which the last occurrence of a value is found in a slice or return -1
-// if the value cannot be found.
-func LastIndexOf[T comparable](slice []T, value T) int {
+// LastIndexOf returns the index at which the last occurrence of the item is found in a slice or return -1 if the then cannot be found.
+func LastIndexOf[T comparable](slice []T, item T) int {
 	for i := len(slice) - 1; i > 0; i-- {
-		if value == slice[i] {
+		if item == slice[i] {
 			return i
 		}
 	}
@@ -835,27 +892,39 @@ func LastIndexOf[T comparable](slice []T, value T) int {
 }

 // ToSlicePointer returns a pointer to the slices of a variable parameter transformation
-func ToSlicePointer[T any](value ...T) []*T {
-	out := make([]*T, len(value))
-	for i := range value {
-		out[i] = &value[i]
+func ToSlicePointer[T any](items ...T) []*T {
+	result := make([]*T, len(items))
+	for i := range items {
+		result[i] = &items[i]
 	}
-	return out
+
+	return result
 }

 // ToSlice returns a slices of a variable parameter transformation
-func ToSlice[T any](value ...T) []T {
-	out := make([]T, len(value))
-	for i := range value {
-		out[i] = value[i]
-	}
-	return out
+func ToSlice[T any](items ...T) []T {
+	result := make([]T, len(items))
+	copy(result, items)
+
+	return result
 }

-// AppendIfAbsent only absent append the value
-func AppendIfAbsent[T comparable](slice []T, value T) []T {
-	if !Contain(slice, value) {
-		slice = append(slice, value)
+// AppendIfAbsent only absent append the item
+func AppendIfAbsent[T comparable](slice []T, item T) []T {
+	if !Contain(slice, item) {
+		slice = append(slice, item)
 	}
 	return slice
 }
+
+// KeyBy converts a slice to a map based on a callback function
+func KeyBy[T any, U comparable](slice []T, iteratee func(item T) U) map[U]T {
+	result := make(map[U]T, len(slice))
+
+	for _, v := range slice {
+		k := iteratee(v)
+		result[k] = v
+	}
+
+	return result
+}
--- a/slice/slice_internal.go
+++ b/slice/slice_internal.go
@@ -3,6 +3,8 @@ package slice
 import (
 	"fmt"
 	"reflect"
+
+	"golang.org/x/exp/constraints"
 )

 // sliceValue return the reflect value of a slice
@@ -14,45 +16,6 @@ func sliceValue(slice any) reflect.Value {
 	return v
 }

-// functionValue return the reflect value of a function
-func functionValue(function any) reflect.Value {
-	v := reflect.ValueOf(function)
-	if v.Kind() != reflect.Func {
-		panic(fmt.Sprintf("Invalid function type, value of type %T", function))
-	}
-	return v
-}
-
-// checkSliceCallbackFuncSignature Check func sign :  s :[]type1{} -> func(i int, data type1) type2
-// see https://coolshell.cn/articles/21164.html#%E6%B3%9B%E5%9E%8BMap-Reduce
-func checkSliceCallbackFuncSignature(fn reflect.Value, types ...reflect.Type) bool {
-	//Check it is a function
-	if fn.Kind() != reflect.Func {
-		return false
-	}
-	// NumIn() - returns a function type's input parameter count.
-	// NumOut() - returns a function type's output parameter count.
-	if (fn.Type().NumIn() != len(types)-1) || (fn.Type().NumOut() != 1) {
-		return false
-	}
-	// In() - returns the type of a function type's i'th input parameter.
-	// first input param type should be int
-	if fn.Type().In(0) != reflect.TypeOf(1) {
-		return false
-	}
-	for i := 0; i < len(types)-1; i++ {
-		if fn.Type().In(i) != types[i] {
-			return false
-		}
-	}
-	// Out() - returns the type of a function type's i'th output parameter.
-	outType := types[len(types)-1]
-	if outType != nil && fn.Type().Out(0) != outType {
-		return false
-	}
-	return true
-}
-
 // sliceElemType get slice element type
 func sliceElemType(reflectType reflect.Type) reflect.Type {
 	for {
@@ -63,3 +26,66 @@ func sliceElemType(reflectType reflect.Type) reflect.Type {
 		reflectType = reflectType.Elem()
 	}
 }
+
+func quickSort[T constraints.Ordered](slice []T, lowIndex, highIndex int, order string) {
+	if lowIndex < highIndex {
+		p := partitionOrderedSlice(slice, lowIndex, highIndex, order)
+		quickSort(slice, lowIndex, p-1, order)
+		quickSort(slice, p+1, highIndex, order)
+	}
+}
+
+// partitionOrderedSlice split ordered slice into two parts for quick sort
+func partitionOrderedSlice[T constraints.Ordered](slice []T, lowIndex, highIndex int, order string) int {
+	p := slice[highIndex]
+	i := lowIndex
+
+	for j := lowIndex; j < highIndex; j++ {
+		if order == "desc" {
+			if slice[j] > p {
+				swap(slice, i, j)
+				i++
+			}
+		} else {
+			if slice[j] < p {
+				swap(slice, i, j)
+				i++
+			}
+		}
+	}
+
+	swap(slice, i, highIndex)
+
+	return i
+}
+
+func quickSortBy[T any](slice []T, lowIndex, highIndex int, less func(a, b T) bool) {
+	if lowIndex < highIndex {
+		p := partitionAnySlice(slice, lowIndex, highIndex, less)
+		quickSortBy(slice, lowIndex, p-1, less)
+		quickSortBy(slice, p+1, highIndex, less)
+	}
+}
+
+// partitionAnySlice split any slice into two parts for quick sort
+func partitionAnySlice[T any](slice []T, lowIndex, highIndex int, less func(a, b T) bool) int {
+	p := slice[highIndex]
+	i := lowIndex
+
+	for j := lowIndex; j < highIndex; j++ {
+
+		if less(slice[j], p) {
+			swap(slice, i, j)
+			i++
+		}
+	}
+
+	swap(slice, i, highIndex)
+
+	return i
+}
+
+// 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/slice/slice_test.go
+++ b/slice/slice_test.go
@@ -1,6 +1,7 @@
 package slice

 import (
+	"fmt"
 	"math"
 	"testing"

@@ -31,6 +32,10 @@ func TestChunk(t *testing.T) {

 	arr := []string{"a", "b", "c", "d", "e"}

+	assert.Equal([][]string{}, Chunk(arr, -1))
+
+	assert.Equal([][]string{}, Chunk(arr, 0))
+
 	r1 := [][]string{{"a"}, {"b"}, {"c"}, {"d"}, {"e"}}
 	assert.Equal(r1, Chunk(arr, 1))

@@ -43,8 +48,11 @@ func TestChunk(t *testing.T) {
 	r4 := [][]string{{"a", "b", "c", "d"}, {"e"}}
 	assert.Equal(r4, Chunk(arr, 4))

-	r5 := [][]string{{"a"}, {"b"}, {"c"}, {"d"}, {"e"}}
+	r5 := [][]string{{"a", "b", "c", "d", "e"}}
 	assert.Equal(r5, Chunk(arr, 5))
+
+	r6 := [][]string{{"a", "b", "c", "d", "e"}}
+	assert.Equal(r6, Chunk(arr, 6))
 }

 func TestCompact(t *testing.T) {
@@ -186,13 +194,22 @@ func TestGroupWith(t *testing.T) {
 }

 func TestCount(t *testing.T) {
+	numbers := []int{1, 2, 3, 3, 5, 6}
+
+	assert := internal.NewAssert(t, "TestCountBy")
+
+	assert.Equal(1, Count(numbers, 1))
+	assert.Equal(2, Count(numbers, 3))
+}
+
+func TestCountBy(t *testing.T) {
 	nums := []int{1, 2, 3, 4, 5, 6}
 	evenFunc := func(i, num int) bool {
 		return (num % 2) == 0
 	}

-	assert := internal.NewAssert(t, "TestCount")
-	assert.Equal(3, Count(nums, evenFunc))
+	assert := internal.NewAssert(t, "TestCountBy")
+	assert.Equal(3, CountBy(nums, evenFunc))
 }

 func TestFind(t *testing.T) {
@@ -428,6 +445,29 @@ func TestUnion(t *testing.T) {
 	assert.Equal([]int{1, 3, 4, 6}, Union(s1))
 }

+func TestUnionBy(t *testing.T) {
+	assert := internal.NewAssert(t, "TestUnionBy")
+
+	testFunc := func(i int) int {
+		return i / 2
+	}
+
+	result := UnionBy(testFunc, []int{0, 1, 2, 3, 4, 5}, []int{0, 2, 10})
+	assert.Equal(result, []int{0, 2, 4, 10})
+}
+
+func TestMerge(t *testing.T) {
+	assert := internal.NewAssert(t, "TestMerge")
+
+	s1 := []int{1, 2, 3, 4}
+	s2 := []int{2, 3, 4, 5}
+	s3 := []int{4, 5, 6}
+
+	assert.Equal([]int{1, 2, 3, 4, 2, 3, 4, 5, 4, 5, 6}, Merge(s1, s2, s3))
+	assert.Equal([]int{1, 2, 3, 4, 2, 3, 4, 5}, Merge(s1, s2))
+	assert.Equal([]int{2, 3, 4, 5, 4, 5, 6}, Merge(s2, s3))
+}
+
 func TestIntersection(t *testing.T) {
 	s1 := []int{1, 2, 2, 3}
 	s2 := []int{1, 2, 3, 4}
@@ -508,6 +548,56 @@ func TestDifferenceBy(t *testing.T) {
 	assert.Equal([]int{1, 2}, DifferenceBy(s1, s2, addOne))
 }

+func TestSort(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSort")
+
+	numbers := []int{1, 4, 3, 2, 5}
+
+	Sort(numbers)
+	assert.Equal([]int{1, 2, 3, 4, 5}, numbers)
+
+	Sort(numbers, "desc")
+	assert.Equal([]int{5, 4, 3, 2, 1}, numbers)
+
+	strings := []string{"a", "d", "c", "b", "e"}
+
+	Sort(strings)
+	assert.Equal([]string{"a", "b", "c", "d", "e"}, strings)
+
+	Sort(strings, "desc")
+	assert.Equal([]string{"e", "d", "c", "b", "a"}, strings)
+}
+
+func TestSortBy(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSortBy")
+
+	numbers := []int{1, 4, 3, 2, 5}
+
+	SortBy(numbers, func(a, b int) bool {
+		return a < b
+	})
+	assert.Equal([]int{1, 2, 3, 4, 5}, numbers)
+
+	type User struct {
+		Name string
+		Age  uint
+	}
+
+	users := []User{
+		{Name: "a", Age: 21},
+		{Name: "b", Age: 15},
+		{Name: "c", Age: 100}}
+
+	SortBy(users, func(a, b User) bool {
+		return a.Age < b.Age
+	})
+
+	t.Logf("sort users by age: %v", users)
+
+	// output
+	// [{b 15} {a 21} {c 100}]
+}
+
 func TestSortByFielDesc(t *testing.T) {
 	assert := internal.NewAssert(t, "TestSortByFielDesc")

@@ -580,8 +670,39 @@ func TestIndexOf(t *testing.T) {
 	assert := internal.NewAssert(t, "TestIndexOf")

 	arr := []string{"a", "a", "b", "c"}
+	key := fmt.Sprintf("%p", arr)
 	assert.Equal(0, IndexOf(arr, "a"))
 	assert.Equal(-1, IndexOf(arr, "d"))
+	assert.Equal(2, memoryHashCounter[key])
+
+	arr1 := []int{1, 2, 3, 4, 5}
+	key1 := fmt.Sprintf("%p", arr1)
+	assert.Equal(3, IndexOf(arr1, 4))
+	assert.Equal(-1, IndexOf(arr1, 6))
+	assert.Equal(2, memoryHashCounter[key1])
+
+	arr2 := []float64{1.1, 2.2, 3.3, 4.4, 5.5}
+	key2 := fmt.Sprintf("%p", arr2)
+	assert.Equal(2, IndexOf(arr2, 3.3))
+	assert.Equal(3, IndexOf(arr2, 4.4))
+	assert.Equal(-1, IndexOf(arr2, 6.6))
+	assert.Equal(3, memoryHashCounter[key2])
+
+	for i := 0; i < 6; i++ {
+		a := []string{"a", "b", "c"}
+		IndexOf(a, "a")
+		IndexOf(a, "b")
+	}
+	minArr := []string{"c", "b", "a"}
+	minKey := fmt.Sprintf("%p", minArr)
+	assert.Equal(0, IndexOf(minArr, "c"))
+
+	arr3 := []string{"q", "w", "e"}
+	key3 := fmt.Sprintf("%p", arr3)
+	assert.Equal(1, IndexOf(arr3, "w"))
+	assert.Equal(-1, IndexOf(arr3, "r"))
+	assert.Equal(2, memoryHashCounter[key3])
+	assert.Equal(0, memoryHashCounter[minKey])
 }

 func TestLastIndexOf(t *testing.T) {
@@ -617,3 +738,48 @@ func TestAppendIfAbsent(t *testing.T) {
 	assert.Equal([]string{"a", "b"}, AppendIfAbsent(str1, "a"))
 	assert.Equal([]string{"a", "b", "c"}, AppendIfAbsent(str1, "c"))
 }
+
+func TestReplace(t *testing.T) {
+	assert := internal.NewAssert(t, "TestReplace")
+
+	strs := []string{"a", "b", "a", "c", "d", "a"}
+
+	assert.Equal([]string{"a", "b", "a", "c", "d", "a"}, Replace(strs, "a", "x", 0))
+	assert.Equal([]string{"x", "b", "a", "c", "d", "a"}, Replace(strs, "a", "x", 1))
+	assert.Equal([]string{"x", "b", "x", "c", "d", "a"}, Replace(strs, "a", "x", 2))
+	assert.Equal([]string{"x", "b", "x", "c", "d", "x"}, Replace(strs, "a", "x", 3))
+	assert.Equal([]string{"x", "b", "x", "c", "d", "x"}, Replace(strs, "a", "x", 4))
+
+	assert.Equal([]string{"x", "b", "x", "c", "d", "x"}, Replace(strs, "a", "x", -1))
+	assert.Equal([]string{"x", "b", "x", "c", "d", "x"}, Replace(strs, "a", "x", -2))
+
+	assert.Equal([]string{"a", "b", "a", "c", "d", "a"}, Replace(strs, "x", "y", 1))
+	assert.Equal([]string{"a", "b", "a", "c", "d", "a"}, Replace(strs, "x", "y", -1))
+}
+
+func TestReplaceAll(t *testing.T) {
+	assert := internal.NewAssert(t, "TestReplaceAll")
+
+	strs := []string{"a", "b", "a", "c", "d", "a"}
+
+	assert.Equal([]string{"x", "b", "x", "c", "d", "x"}, ReplaceAll(strs, "a", "x"))
+	assert.Equal([]string{"a", "b", "a", "c", "d", "a"}, ReplaceAll(strs, "e", "x"))
+}
+
+func TestKeyBy(t *testing.T) {
+	assert := internal.NewAssert(t, "TestKeyBy")
+
+	result := KeyBy([]string{"a", "ab", "abc"}, func(str string) int {
+		return len(str)
+	})
+
+	assert.Equal(result, map[int]string{1: "a", 2: "ab", 3: "abc"})
+}
+
+func TestRepeat(t *testing.T) {
+	assert := internal.NewAssert(t, "TestRepeat")
+
+	result := Repeat("a", 6)
+
+	assert.Equal(result, []string{"a", "a", "a", "a", "a", "a"})
+}
--- a/strutil/string.go
+++ b/strutil/string.go
@@ -4,53 +4,41 @@
 package strutil

 import (
-	"regexp"
 	"strings"
 	"unicode"
 	"unicode/utf8"
 )

 // CamelCase covert string to camelCase string.
+// non letters and numbers will be ignored
+// eg. "Foo-#1😄$_%^&*(1bar" => "foo11Bar"
 func CamelCase(s string) string {
-	if len(s) == 0 {
-		return ""
-	}
+	var builder strings.Builder

-	result := ""
-	blankSpace := " "
-	regex, _ := regexp.Compile("[-_&]+")
-	ss := regex.ReplaceAllString(s, blankSpace)
-	for i, v := range strings.Split(ss, blankSpace) {
-		vv := []rune(v)
+	strs := splitIntoStrings(s, false)
+	for i, str := range strs {
 		if i == 0 {
-			if vv[i] >= 65 && vv[i] <= 96 {
-				vv[0] += 32
-			}
-			result += string(vv)
+			builder.WriteString(strings.ToLower(str))
 		} else {
-			result += Capitalize(v)
+			builder.WriteString(Capitalize(str))
 		}
 	}

-	return result
+	return builder.String()
 }

 // Capitalize converts the first character of a string to upper case and the remaining to lower case.
 func Capitalize(s string) string {
-	if len(s) == 0 {
-		return ""
-	}
-
-	out := make([]rune, len(s))
+	result := make([]rune, len(s))
 	for i, v := range s {
 		if i == 0 {
-			out[i] = unicode.ToUpper(v)
+			result[i] = unicode.ToUpper(v)
 		} else {
-			out[i] = unicode.ToLower(v)
+			result[i] = unicode.ToLower(v)
 		}
 	}

-	return string(out)
+	return string(result)
 }

 // UpperFirst converts the first character of string to upper case.
@@ -116,46 +104,34 @@ func PadStart(source string, size int, padStr string) string {
 }

 // KebabCase covert string to kebab-case
+// non letters and numbers will be ignored
+// eg. "Foo-#1😄$_%^&*(1bar" => "foo-1-1-bar"
 func KebabCase(s string) string {
-	if len(s) == 0 {
-		return ""
-	}
-
-	regex := regexp.MustCompile(`[\W|_]+`)
-	blankSpace := " "
-	match := regex.ReplaceAllString(s, blankSpace)
-	rs := strings.Split(match, blankSpace)
-
-	var result []string
-	for _, v := range rs {
-		splitWords := splitWordsToLower(v)
-		if len(splitWords) > 0 {
-			result = append(result, splitWords...)
-		}
-	}
+	result := splitIntoStrings(s, false)
+	return strings.Join(result, "-")
+}

+// UpperKebabCase covert string to upper KEBAB-CASE
+// non letters and numbers will be ignored
+// eg. "Foo-#1😄$_%^&*(1bar" => "FOO-1-1-BAR"
+func UpperKebabCase(s string) string {
+	result := splitIntoStrings(s, true)
 	return strings.Join(result, "-")
 }

 // SnakeCase covert string to snake_case
+// non letters and numbers will be ignored
+// eg. "Foo-#1😄$_%^&*(1bar" => "foo_1_1_bar"
 func SnakeCase(s string) string {
-	if len(s) == 0 {
-		return ""
-	}
-
-	regex := regexp.MustCompile(`[\W|_]+`)
-	blankSpace := " "
-	match := regex.ReplaceAllString(s, blankSpace)
-	rs := strings.Split(match, blankSpace)
-
-	var result []string
-	for _, v := range rs {
-		splitWords := splitWordsToLower(v)
-		if len(splitWords) > 0 {
-			result = append(result, splitWords...)
-		}
-	}
+	result := splitIntoStrings(s, false)
+	return strings.Join(result, "_")
+}

+// UpperSnakeCase covert string to upper SNAKE_CASE
+// non letters and numbers will be ignored
+// eg. "Foo-#1😄$_%^&*(1bar" => "FOO_1_1_BAR"
+func UpperSnakeCase(s string) string {
+	result := splitIntoStrings(s, true)
 	return strings.Join(result, "_")
 }

--- a/strutil/string_internal.go
+++ b/strutil/string_internal.go
@@ -1,40 +1,100 @@
 package strutil

-import "strings"
+import (
+	"unicode"
+)

-// splitWordsToLower split a string into worlds by uppercase char
-func splitWordsToLower(s string) []string {
-	var result []string
+func splitIntoStrings(s string, upperCase bool) []string {
+	var runes [][]rune
+	lastCharType := 0
+	charType := 0

-	upperIndexes := upperIndex(s)
-	l := len(upperIndexes)
-	if upperIndexes == nil || l == 0 {
-		if s != "" {
-			result = append(result, s)
+	// split into fields based on type of unicode character
+	for _, r := range s {
+		switch true {
+		case isLower(r):
+			charType = 1
+		case isUpper(r):
+			charType = 2
+		case isDigit(r):
+			charType = 3
+		default:
+			charType = 4
 		}
-		return result
-	}
-	for i := 0; i < l; i++ {
-		if i < l-1 {
-			result = append(result, strings.ToLower(s[upperIndexes[i]:upperIndexes[i+1]]))
+
+		if charType == lastCharType {
+			runes[len(runes)-1] = append(runes[len(runes)-1], r)
 		} else {
-			result = append(result, strings.ToLower(s[upperIndexes[i]:]))
+			runes = append(runes, []rune{r})
 		}
+		lastCharType = charType
 	}
-	return result
-}

-// upperIndex get a int slice which elements are all the uppercase char index of a string
-func upperIndex(s string) []int {
-	var result []int
-	for i := 0; i < len(s); i++ {
-		if 64 < s[i] && s[i] < 91 {
-			result = append(result, i)
+	for i := 0; i < len(runes)-1; i++ {
+		if isUpper(runes[i][0]) && isLower(runes[i+1][0]) {
+			runes[i+1] = append([]rune{runes[i][len(runes[i])-1]}, runes[i+1]...)
+			runes[i] = runes[i][:len(runes[i])-1]
 		}
 	}
-	if len(s) > 0 && result != nil && result[0] != 0 {
-		result = append([]int{0}, result...)
+
+	// filter all none letters and none digit
+	var result []string
+	for _, rs := range runes {
+		if len(rs) > 0 && (unicode.IsLetter(rs[0]) || isDigit(rs[0])) {
+			if upperCase {
+				result = append(result, string(toUpperAll(rs)))
+			} else {
+				result = append(result, string(toLowerAll(rs)))
+			}
+		}
 	}

 	return result
 }
+
+// isDigit checks if a character is digit ('0' to '9')
+func isDigit(r rune) bool {
+	return r >= '0' && r <= '9'
+}
+
+// isLower checks if a character is lower case ('a' to 'z')
+func isLower(r rune) bool {
+	return r >= 'a' && r <= 'z'
+}
+
+// isUpper checks if a character is upper case ('A' to 'Z')
+func isUpper(r rune) bool {
+	return r >= 'A' && r <= 'Z'
+}
+
+// toLower converts a character  'A' to 'Z' to its lower case
+func toLower(r rune) rune {
+	if r >= 'A' && r <= 'Z' {
+		return r + 32
+	}
+	return r
+}
+
+// toLowerAll converts a character  'A' to 'Z' to its lower case
+func toLowerAll(rs []rune) []rune {
+	for i := range rs {
+		rs[i] = toLower(rs[i])
+	}
+	return rs
+}
+
+// toUpper converts a character  'a' to 'z' to its upper case
+func toUpper(r rune) rune {
+	if r >= 'a' && r <= 'z' {
+		return r - 32
+	}
+	return r
+}
+
+// toUpperAll converts a character  'a' to 'z' to its upper case
+func toUpperAll(rs []rune) []rune {
+	for i := range rs {
+		rs[i] = toUpper(rs[i])
+	}
+	return rs
+}
--- a/strutil/string_test.go
+++ b/strutil/string_test.go
@@ -9,67 +9,163 @@ import (
 func TestCamelCase(t *testing.T) {
 	assert := internal.NewAssert(t, "TestCamelCase")

-	assert.Equal("fooBar", CamelCase("foo_bar"))
-	assert.Equal("fooBar", CamelCase("Foo-Bar"))
-	assert.Equal("fooBar", CamelCase("Foo&bar"))
-	assert.Equal("fooBar", CamelCase("foo bar"))
+	cases := map[string]string{
+		"":                         "",
+		"foobar":                   "foobar",
+		"&FOO:BAR$BAZ":             "fooBarBaz",
+		"fooBar":                   "fooBar",
+		"FOObar":                   "foObar",
+		"$foo%":                    "foo",
+		"   $#$Foo   22    bar   ": "foo22Bar",
+		"Foo-#1😄$_%^&*(1bar":       "foo11Bar",
+	}

-	assert.NotEqual("FooBar", CamelCase("foo_bar"))
+	for k, v := range cases {
+		assert.Equal(v, CamelCase(k))
+	}
 }

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

-	assert.Equal("Foo", Capitalize("foo"))
-	assert.Equal("Foo", Capitalize("Foo"))
-	assert.Equal("Foo", Capitalize("Foo"))
+	cases := map[string]string{
+		"":        "",
+		"Foo":     "Foo",
+		"_foo":    "_foo",
+		"foobar":  "Foobar",
+		"fooBar":  "Foobar",
+		"foo Bar": "Foo bar",
+		"foo-bar": "Foo-bar",
+		"$foo%":   "$foo%",
+	}

-	assert.NotEqual("foo", Capitalize("Foo"))
+	for k, v := range cases {
+		assert.Equal(v, Capitalize(k))
+	}
 }

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

-	assert.Equal("foo-bar", KebabCase("Foo Bar-"))
-	assert.Equal("foo-bar", KebabCase("foo_Bar"))
-	assert.Equal("foo-bar", KebabCase("fooBar"))
-	assert.Equal("f-o-o-b-a-r", KebabCase("__FOO_BAR__"))
+	cases := map[string]string{
+		"":                         "",
+		"foo-bar":                  "foo-bar",
+		"--Foo---Bar-":             "foo-bar",
+		"Foo Bar-":                 "foo-bar",
+		"foo_Bar":                  "foo-bar",
+		"fooBar":                   "foo-bar",
+		"FOOBAR":                   "foobar",
+		"FOO_BAR":                  "foo-bar",
+		"__FOO_BAR__":              "foo-bar",
+		"$foo@Bar":                 "foo-bar",
+		"   $#$Foo   22    bar   ": "foo-22-bar",
+		"Foo-#1😄$_%^&*(1bar":       "foo-1-1-bar",
+	}

-	assert.NotEqual("foo_bar", KebabCase("fooBar"))
+	for k, v := range cases {
+		assert.Equal(v, KebabCase(k))
+	}
+}
+
+func TestUpperKebabCase(t *testing.T) {
+	assert := internal.NewAssert(t, "TestUpperKebabCase")
+
+	cases := map[string]string{
+		"":                         "",
+		"foo-bar":                  "FOO-BAR",
+		"--Foo---Bar-":             "FOO-BAR",
+		"Foo Bar-":                 "FOO-BAR",
+		"foo_Bar":                  "FOO-BAR",
+		"fooBar":                   "FOO-BAR",
+		"FOOBAR":                   "FOOBAR",
+		"FOO_BAR":                  "FOO-BAR",
+		"__FOO_BAR__":              "FOO-BAR",
+		"$foo@Bar":                 "FOO-BAR",
+		"   $#$Foo   22    bar   ": "FOO-22-BAR",
+		"Foo-#1😄$_%^&*(1bar":       "FOO-1-1-BAR",
+	}
+
+	for k, v := range cases {
+		assert.Equal(v, UpperKebabCase(k))
+	}
 }

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

-	assert.Equal("foo_bar", SnakeCase("Foo Bar-"))
-	assert.Equal("foo_bar", SnakeCase("foo_Bar"))
-	assert.Equal("foo_bar", SnakeCase("fooBar"))
-	assert.Equal("f_o_o_b_a_r", SnakeCase("__FOO_BAR__"))
-	assert.Equal("a_bbc_s_a_b_b_c", SnakeCase("aBbc-s$@a&%_B.B^C"))
+	cases := map[string]string{
+		"":                         "",
+		"foo-bar":                  "foo_bar",
+		"--Foo---Bar-":             "foo_bar",
+		"Foo Bar-":                 "foo_bar",
+		"foo_Bar":                  "foo_bar",
+		"fooBar":                   "foo_bar",
+		"FOOBAR":                   "foobar",
+		"FOO_BAR":                  "foo_bar",
+		"__FOO_BAR__":              "foo_bar",
+		"$foo@Bar":                 "foo_bar",
+		"   $#$Foo   22    bar   ": "foo_22_bar",
+		"Foo-#1😄$_%^&*(1bar":       "foo_1_1_bar",
+	}

-	assert.NotEqual("foo-bar", SnakeCase("foo_Bar"))
+	for k, v := range cases {
+		assert.Equal(v, SnakeCase(k))
+	}
+}
+
+func TestUpperSnakeCase(t *testing.T) {
+	assert := internal.NewAssert(t, "TestUpperSnakeCase")
+
+	cases := map[string]string{
+		"":                         "",
+		"foo-bar":                  "FOO_BAR",
+		"--Foo---Bar-":             "FOO_BAR",
+		"Foo Bar-":                 "FOO_BAR",
+		"foo_Bar":                  "FOO_BAR",
+		"fooBar":                   "FOO_BAR",
+		"FOOBAR":                   "FOOBAR",
+		"FOO_BAR":                  "FOO_BAR",
+		"__FOO_BAR__":              "FOO_BAR",
+		"$foo@Bar":                 "FOO_BAR",
+		"   $#$Foo   22    bar   ": "FOO_22_BAR",
+		"Foo-#1😄$_%^&*(1bar":       "FOO_1_1_BAR",
+	}
+
+	for k, v := range cases {
+		assert.Equal(v, UpperSnakeCase(k))
+	}
 }

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

-	assert.Equal("Foo", UpperFirst("foo"))
-	assert.Equal("BAR", UpperFirst("bAR"))
-	assert.Equal("FOo", UpperFirst("FOo"))
-	assert.Equal("FOo大", UpperFirst("fOo大"))
+	cases := map[string]string{
+		"":     "",
+		"foo":  "Foo",
+		"bAR":  "BAR",
+		"FOo":  "FOo",
+		"fOo大": "FOo大",
+	}

-	assert.NotEqual("Bar", UpperFirst("BAR"))
+	for k, v := range cases {
+		assert.Equal(v, UpperFirst(k))
+	}
 }

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

-	assert.Equal("foo", LowerFirst("foo"))
-	assert.Equal("bAR", LowerFirst("BAR"))
-	assert.Equal("fOo", LowerFirst("FOo"))
-	assert.Equal("fOo大", LowerFirst("FOo大"))
+	cases := map[string]string{
+		"":     "",
+		"foo":  "foo",
+		"bAR":  "bAR",
+		"FOo":  "fOo",
+		"fOo大": "fOo大",
+	}

-	assert.NotEqual("Bar", LowerFirst("BAR"))
+	for k, v := range cases {
+		assert.Equal(v, LowerFirst(k))
+	}
 }

 func TestPadEnd(t *testing.T) {
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
dudaodong	b7e5d946f1	release v2.1.12	2022-12-15 16:55:20 +08:00
dudaodong	687db4ce79	update readme file	2022-12-15 16:44:30 +08:00
dudaodong	a9a4bb8841	update readme file	2022-12-15 16:42:22 +08:00
dudaodong	bc6cb5f61b	fix code issue in doc	2022-12-15 16:38:50 +08:00
dudaodong	2c57266f8e	test: update some test functions	2022-12-15 15:22:01 +08:00
dudaodong	57e49c9520	doc: update document for funcations CamelCase/KebabCase/UpperKebabCase/SnakeCase/UpperSnakeCase	2022-12-14 21:42:43 +08:00
dudaodong	985c9a5d9a	refactor: refact CamelCase function	2022-12-14 21:27:29 +08:00
dudaodong	5cfb11f036	feat: fix and add SnakeCase/UpperSnakeCase	2022-12-14 21:17:30 +08:00
dudaodong	5b3d48a1e7	feat: fix and add KebabCase/UpperKebabCase	2022-12-14 21:09:22 +08:00
dudaodong	d0576e028f	clean code	2022-12-13 19:52:37 +08:00
dudaodong	76bdec2b54	test: add cases for Capitalize	2022-12-13 16:16:16 +08:00
dudaodong	fa20aba3a7	fix: fix CamelCase function bug	2022-12-13 14:23:32 +08:00
dudaodong	7a4a429e23	test: add cases for Capitalize	2022-12-12 21:11:19 +08:00
dudaodong	a70ec6ad1e	refactor: use constraints from golang.org/x/exp/constraints	2022-12-11 11:25:34 +08:00
dudaodong	e435fa271b	doc: update doc for Comma	2022-12-10 21:03:16 +08:00
dudaodong	1533d00891	refactor: update Comma function	2022-12-10 20:59:27 +08:00
dudaodong	8b99641de0	test: remove print info in test function	2022-12-10 19:19:49 +08:00
dudaodong	251f899f18	fix: TestExecCommand failed in linux/macos	2022-12-10 19:12:19 +08:00
dudaodong	00407e5182	fix: fix lint issue	2022-12-10 19:09:18 +08:00
dudaodong	4e457ad672	change: change update and insert function in link datastruture	2022-12-10 17:45:29 +08:00
dudaodong	7d8d9c3543	fix: fix lint issue	2022-12-10 16:55:06 +08:00
dudaodong	1197e8d1b6	fix: fix lint issue	2022-12-10 16:53:41 +08:00
dudaodong	13bbe19ab2	fix: fix lint issue	2022-12-10 16:41:40 +08:00
dudaodong	2725575d2f	doc: add doc for IsGBK'	2022-12-09 19:28:45 +08:00
dudaodong	037d2729ce	doc: update doc for ExecCommand	2022-12-09 19:20:15 +08:00
dudaodong	09d98745b0	fix: fix ExecCommand bug in windows	2022-12-09 19:10:55 +08:00
dudaodong	af5cfe6da1	feat: add IsGBK validator	2022-12-09 17:36:59 +08:00
Mickls	d59259bbe0	feat: A more reasonable IndexOf function (#66 )	2022-12-09 11:31:40 +08:00
dudaodong	3189628d54	fix: fix AesCfbDecrypt	2022-12-08 15:07:40 +08:00
dudaodong	62c5e251a5	remove website	2022-12-08 14:55:21 +08:00
dudaodong	6e6444c8c0	refator: clean code	2022-12-06 20:20:36 +08:00
dudaodong	dd613e98b2	refator: clean code	2022-12-06 20:00:41 +08:00
dudaodong	2d905ab03e	fix: fix word misspelling	2022-12-04 11:25:02 +08:00
dudaodong	205fedb197	release v2.1.11	2022-12-04 11:11:05 +08:00
dudaodong	4c864da62d	doc: update readme file	2022-12-04 11:10:19 +08:00
dudaodong	263ab7e316	clean code	2022-12-03 14:41:58 +08:00
dudaodong	809b7a53df	doc: update docment for slice package	2022-12-03 14:33:15 +08:00
dudaodong	61c43daabb	doc: add doc for Count and CountBy function	2022-12-03 14:20:37 +08:00
dudaodong	18914ee2cd	feat: add deprecat IntSlice, InterfaceSlice and StringSlice	2022-12-03 14:00:44 +08:00
dudaodong	0a8058956f	feat: add Count and CountBy function	2022-12-03 13:04:12 +08:00
dudaodong	a044da7d2f	refactor: clean code	2022-12-03 12:58:25 +08:00
dudaodong	f8b785c4cb	doc: add doc for Sort and SortBy	2022-12-02 15:47:16 +08:00
dudaodong	82c8a04c35	make SortByField function deprecate	2022-12-02 15:17:08 +08:00
dudaodong	280ecb5cef	feat: add SortBy function for slice	2022-12-02 14:53:57 +08:00
dudaodong	ec27ad4c40	feat: add Sort function for slice	2022-12-01 22:46:56 +08:00
dudaodong	d66f92cd68	doc: update slice and convertor document	2022-12-01 11:43:10 +08:00
dudaodong	d8ed692651	refactor: code improvement, ToString, Contain, Compact	2022-12-01 11:38:25 +08:00
dudaodong	a16de97d1d	refactor: code improvement, ToString, Contain, Compact	2022-12-01 11:38:14 +08:00
dudaodong	6f458e4367	doc: add doc for NewSetFromSlice	2022-11-30 12:34:56 +08:00
dudaodong	37c7508ad0	feat: add NewSetFromSlice function for set	2022-11-30 12:00:55 +08:00
dudaodong	acb5844b15	docs: add doc for AddIfNotExist and AddIfNotExistBy	2022-11-30 11:54:04 +08:00
dudaodong	76f4eeea16	docs: add doc for Merge and Repeat	2022-11-30 11:35:32 +08:00
dudaodong	5466a23019	refactor: fix bad code smell	2022-11-30 11:20:13 +08:00
dudaodong	5692982dd1	feat: add AddIfNotExistBy function for set	2022-11-29 23:59:22 +08:00
dudaodong	c39c8914fb	refactor: fix bad code smell	2022-11-29 23:50:17 +08:00
dudaodong	29bdca1bd2	feat: add AddIfNotExist function for set	2022-11-29 23:39:29 +08:00
dudaodong	eb66d038ac	feat: update iterator package	2022-11-29 13:58:48 +08:00
dudaodong	a99ada5ee1	feat: add iterator package	2022-11-28 19:24:25 +08:00
dudaodong	a87faf5453	feat: add Repeate function for slice	2022-11-27 21:43:38 +08:00
dudaodong	ab6fec2f69	refactor: fix bad code smell	2022-11-27 21:36:30 +08:00
dudaodong	7b290989f5	feat: add Merge function	2022-11-27 20:20:00 +08:00
dudaodong	5722c724e6	Merge branch 'main' into v2	2022-11-27 19:29:33 +08:00
dudaodong	f84584ca04	doc: add website link	2022-11-27 18:44:25 +08:00
dudaodong	80cbbdc787	docs: format index content	2022-11-26 17:37:09 +08:00
dudaodong	be148e07ba	fix: fix chunk slice bug	2022-11-26 16:21:57 +08:00
dudaodong	d36ab5cc3a	fix: go report issue ineffassign	2022-11-18 17:05:54 +08:00
dudaodong	2b17329094	release v2.1.10	2022-11-17 16:11:48 +08:00
dudaodong	f869a0a670	fix: issue#62: fix ZipSlip bug	2022-11-16 16:04:38 +08:00
dudaodong	be000a4bd6	fix: issue#62: fix ZipSlip bug	2022-11-16 15:08:42 +08:00
DuDaoDong	81efa800ea	Create SECURITY.md	2022-11-16 11:31:50 +08:00
dudaodong	a783de57a8	release v2.1.9	2022-11-08 15:22:37 +08:00
dudaodong	a622959a78	docs: add new functions readme	2022-11-08 15:21:31 +08:00
dudaodong	f709dd53ce	docs: update doc for random package	2022-11-08 14:48:02 +08:00
dudaodong	ee9e9625e2	docs: add doc for UnionBy and KeyBy	2022-11-08 14:21:17 +08:00
dudaodong	84da7d4f27	feat: add RandUpper, RandLower, RandNumeral, and RandNumeralOrLetter	2022-11-06 20:04:52 +08:00
dudaodong	089fd4e13c	feat: add UnionBy for slice	2022-11-05 19:45:34 +08:00
dudaodong	6c40e02324	refactor: clean code	2022-11-05 19:33:56 +08:00
dudaodong	a270b1b634	feat: make code clear	2022-11-05 17:09:56 +08:00
dudaodong	260fb795d3	feat: add KeyBy for slice	2022-11-05 16:52:31 +08:00
dudaodong	8c036f830c	refactor: remove unuseful code	2022-11-05 16:39:42 +08:00
dudaodong	bf332b9f1c	release v2.1.8	2022-10-21 16:22:52 +08:00
dudaodong	6b6cd66f9f	Merge branch 'main' into v2	2022-10-19 17:31:51 +08:00
燕归来	5399c2290e	feat: support type alias for Number constraint (#60 )	2022-10-19 17:21:53 +08:00
dudaodong	6248293c49	doc: add docment for Replace and ReplaceAll	2022-10-17 10:40:35 +08:00
dudaodong	eced25b76d	test: add unit test for Replace and ReplaceAll	2022-10-17 10:26:54 +08:00
dudaodong	96a4327aa7	fix: fix some static check issues	2022-10-15 15:03:24 +08:00
dudaodong	fcfbdea597	feat: add Replace and ReplaceAll for slice	2022-10-15 14:49:49 +08:00
dudaodong	87896f917a	doc: add document for pipeline	2022-10-15 12:36:11 +08:00
dudaodong	b8563ed646	feat: add Pipeline function	2022-10-15 12:29:47 +08:00
dudaodong	1ccf0af2b3	doc: update document for datetime package	2022-10-14 10:20:38 +08:00
dudaodong	6314889c6a	release v2.1.7	2022-10-14 10:08:43 +08:00
dudaodong	294bd5a5ed	doc: update document for hashmap	2022-10-11 15:41:09 +08:00
dudaodong	ca44815fd5	Merge branch 'main' into v2	2022-10-11 15:02:28 +08:00
dudaodong	bcd1cabf80	feat: add Keys and Values function for hashmap	2022-10-10 16:34:05 +08:00
CyJaySong	4edefcca67	expand BeginOfWeek、EndOfWeek (#59 )	2022-10-10 15:44:22 +08:00
dudaodong	fab24c8d12	feat: add Iterate for hashmap datastructure	2022-10-10 15:25:30 +08:00
dudaodong	604acd9b07	doc:add lancet api doc website	2022-09-29 18:41:22 +08:00
dudaodong	531cb19fd1	release v2.1.6	2022-08-31 17:07:32 +08:00
dudaodong	4f0161ca53	doc: add source code link for http_client	2022-08-31 15:56:41 +08:00
dudaodong	73362b7f69	doc: update readme file	2022-08-31 11:40:24 +08:00
dudaodong	b289f2975b	doc: add document for functions in netutil/http_client.go	2022-08-31 11:20:22 +08:00
dudaodong	90ce2705ca	test: add unit test for http client	2022-08-30 17:33:58 +08:00
dudaodong	35e1d09ce3	feat: add http client for sending http request	2022-08-30 17:22:17 +08:00
dudaodong	d67d8fad3a	doc: fix missing word in file condition.md	2022-08-29 14:02:30 +08:00
dudaodong	c5e6d01a31	update readme file: add new package and function	2022-08-29 11:50:37 +08:00
dudaodong	6d6c3f692f	refactor: change TernaryOperator signature	2022-08-29 11:27:51 +08:00
dudaodong	c695837b16	doc: add document for package condition	2022-08-29 11:23:02 +08:00
dudaodong	ef28b52963	fix: fix regex isChineseMobileRegexMatcher not work	2022-08-28 20:58:34 +08:00
dudaodong	18b2b6ff7c	feat: add functons: And, Or, Xor, Nor, Xnor, Nand	2022-08-28 20:57:28 +08:00
dudaodong	6a05a123f4	feat: add Bool function to check if a value is truthy or falsy	2022-08-28 20:38:19 +08:00
dudaodong	f7c33f258d	Merge branch 'main' into v2	2022-08-27 19:25:24 +08:00
dudaodong	04058dd7da	refactor: change common package to condition package	2022-08-27 19:19:34 +08:00
郑一诺她爸	72e1d92fa1	TernaryOperator Reduce if else operations (#56 ) * feat:(slice add AppendIfAbsent function) * feat:(slice add TernaryOperator function) Co-authored-by: george.zheng <george.zheng@ambergroup.io>	2022-08-27 19:12:03 +08:00
dudaodong	063df0f0d1	doc: add docment for IsZeroValue function	2022-08-27 19:04:57 +08:00
dudaodong	fc10689b25	feat: add IsZeroValue function	2022-08-27 18:57:45 +08:00
dudaodong	9239bcfdc3	doc: fmt code example	2022-08-26 16:34:20 +08:00
dudaodong	c984815dea	doc: fmt code example	2022-08-26 16:29:55 +08:00
dudaodong	301cb5db87	doc: add hashmap	2022-08-26 16:26:16 +08:00
dudaodong	cc1bacff74	doc: add document for EncodeByte and DecodeByte	2022-08-26 10:54:51 +08:00
dudaodong	f49f75b371	test: add unit test for EncodeByte and DecodeByte	2022-08-26 10:47:25 +08:00
dudaodong	b30f4a7bab	feat: add DecodeByte	2022-08-26 10:35:54 +08:00
dudaodong	982cb8932b	feat: add EncodeByte	2022-08-26 10:34:42 +08:00
dudaodong	9107eb4b32	fix: fix resize bug in HashMap	2022-08-25 14:04:26 +08:00