release v2.2.3

doc: update link in readme
2026-02-04 21:02:27 +08:00 · 2023-07-03 14:09:04 +08:00 · 2023-07-03 11:57:50 +08:00 · 2023-07-03 11:21:49 +08:00 · 2023-07-03 11:14:55 +08:00 · 2023-07-03 10:52:26 +08:00
78 changed files with 5557 additions and 207 deletions
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 <br/>

 ![Go version](https://img.shields.io/badge/go-%3E%3Dv1.18-9cf)
-[![Release](https://img.shields.io/badge/release-2.2.2-green.svg)](https://github.com/duke-git/lancet/releases)
+[![Release](https://img.shields.io/badge/release-2.2.3-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)
@@ -24,7 +24,7 @@ English | [简体中文](./README_zh-CN.md)
 ## Feature

 -   👏 Comprehensive, efficient and reusable.
-   💪 500+ go util functions, support string, slice, datetime, net, crypt...
+-   💪 600+ go util functions, support string, slice, datetime, net, crypt...
 -   💅 Only depends on two kinds of libraries: go standard library and golang.org/x.
 -   🌍 Unit test for every exported function.

@@ -73,7 +73,35 @@ func main() {

 ## Documentation

-### 1. Algorithm package implements some basic algorithm. eg. sort, search.
+### <span id="index">Index<span>
+
+-   [Algorithm](#Algorithm)
+-   [Compare](#Compare)
+-   [Concurrency](#Concurrency)
+-   [Condition](#Condition)
+-   [Convertor](#Convertor)
+-   [Cryptor](#Cryptor)
+-   [Datetime](#Datetime)
+-   [Datastructure](#Datastructure)
+-   [Fileutil](#Fileutil)
+-   [Formatter](#Formatter)
+-   [Function](#Function)
+-   [Maputil](#Maputil)
+-   [Mathutil](#Mathutil)
+-   [Netutil](#Netutil)
+-   [Pointer](#Pointer)
+-   [Random](#Random)
+-   [Retry](#Retry)
+-   [Slice](#Slice)
+-   [Stream](#Stream)
+-   [Structs](#Structs)
+-   [Strutil](#Strutil)
+-   [System](#System)
+-   [Tuple](#Tuple)
+-   [Validator](#Validator)
+-   [Xerror](#Xerror)
+
+<h3 id="Algorithm"> 1. Algorithm package implements some basic algorithm. eg. sort, search. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</span> </h3>

 ```go
 import "github.com/duke-git/lancet/v2/algorithm"
@@ -118,7 +146,7 @@ import "github.com/duke-git/lancet/v2/algorithm"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#LRUCache)]
    [[play](https://go.dev/play/p/-EZjgOURufP)]

-### 2. Compare package provides a lightweight comparison function on any type.
+<h3 id="Compare"> 2. Compare package provides a lightweight comparison function on any type. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</span> </h3>

 ```go
 import "github.com/duke-git/lancet/v2/compare"
@@ -145,7 +173,7 @@ import "github.com/duke-git/lancet/v2/compare"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/compare.md#GreaterOrEqual)]
    [[play](https://go.dev/play/p/vx8mP0U8DFk)]

-### 3. Concurrency package contain some functions to support concurrent programming. eg, goroutine, channel, async.
+<h3 id="Concurrency"> 3. Concurrency package contain some functions to support concurrent programming. eg, goroutine, channel, async. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</span> </h3>

 ```go
 import "github.com/duke-git/lancet/v2/concurrency"
@@ -184,7 +212,7 @@ import "github.com/duke-git/lancet/v2/concurrency"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/concurrency.md#Tee)]
    [[play](https://go.dev/play/p/3TQPKnCirrP)]

-### 4. Condition package contains some functions for conditional judgment. eg. And, Or, TernaryOperator...
+<h3 id="Condition"> 4. Condition package contains some functions for conditional judgment. eg. And, Or, TernaryOperator...&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</span> </h3>

 ```go
 import "github.com/duke-git/lancet/v2/condition"
@@ -217,7 +245,7 @@ import "github.com/duke-git/lancet/v2/condition"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/condition.md#TernaryOperator)]
    [[play](https://go.dev/play/p/ElllPZY0guT)]

-### 5. Convertor package contains some functions for data convertion.
+<h3 id="Convertor"> 5. Convertor package contains some functions for data convertion. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</span> </h3>

 ```go
 import "github.com/duke-git/lancet/v2/convertor"
@@ -284,10 +312,12 @@ import "github.com/duke-git/lancet/v2/convertor"
    [[play](https://go.dev/play/p/syqw0-WG7Xd)]
 -   **<big>Utf8ToGbk</big>** : converts utf8 encoding data to GBK encoding data
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#Utf8ToGbk)]
+    [[play](https://go.dev/play/p/9FlIaFLArIL)]
 -   **<big>GbkToUtf8</big>** : converts GBK encoding data to utf8 encoding data.
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#GbkToUtf8)]
+    [[play](https://go.dev/play/p/OphmHCN_9u8)]

-### 6. Cryptor package is for data encryption and decryption.
+<h3 id="Cryptor"> 6. Cryptor package is for data encryption and decryption.</span> &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</span></h3>

 ```go
 import "github.com/duke-git/lancet/v2/cryptor"
@@ -391,7 +421,7 @@ import "github.com/duke-git/lancet/v2/cryptor"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#RsaDecrypt)]
    [[play](https://go.dev/play/p/uef0q1fz53I)]

-### 7. Datetime package supports date and time format and compare.
+<h3 id="Datetime"> 7. Datetime package supports date and time format and compare. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</span></h3>

 ```go
 import "github.com/duke-git/lancet/v2/datetime"
@@ -505,8 +535,7 @@ import "github.com/duke-git/lancet/v2/datetime"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#IsWeekend)]
    [[play](https://go.dev/play/p/cupRM5aZOIY)]

-
-### 8. Datastructure package constains some common data structure. eg. list, linklist, stack, queue, set, tree, graph.
+<h3 id="Datastructure"> 8. Datastructure package constains some common data structure. eg. list, linklist, stack, queue, set, tree, graph. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</span></h3>

 ```go
 import list "github.com/duke-git/lancet/v2/datastructure/list"
@@ -538,7 +567,7 @@ import hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
 -   **<big>Hashmap</big>** : hash map structure.
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/datastructure/hashmap.md)]

-### 9. Fileutil package implements some basic functions for file operations.
+<h3 id="Fileutil"> 9. Fileutil package implements some basic functions for file operations. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</span></h3>

 ```go
 import "github.com/duke-git/lancet/v2/fileutil"
@@ -613,6 +642,7 @@ import "github.com/duke-git/lancet/v2/fileutil"
    [[play](https://go.dev/play/p/OExTkhGEd3_u)]
 -   **<big>WriteCsvFile</big>** : write content to target csv file.
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#WriteCsvFile)]
+    [[play](https://go.dev/play/p/dAXm58Q5U1o)]
 -   **<big>WriteBytesToFile</big>** : write bytes to target file.
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#WriteBytesToFile)]
    [[play](https://go.dev/play/p/s7QlDxMj3P8)]
@@ -620,8 +650,7 @@ import "github.com/duke-git/lancet/v2/fileutil"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#WriteStringToFile)]
    [[play](https://go.dev/play/p/GhLS6d8lH_g)]

-
-### 10. Formatter contains some functions for data formatting.
+<h3 id="Formatter"> 10. Formatter contains some functions for data formatting. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</span></h3>

 ```go
 import "github.com/duke-git/lancet/v2/formatter"
@@ -651,7 +680,7 @@ import "github.com/duke-git/lancet/v2/formatter"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/formatter.md#ParseBinaryBytes)]
    [[play](https://go.dev/play/p/69v1tTT62x8)]

-### 11. Function package can control the flow of function execution and support part of functional programming
+<h3 id="Function"> 11. Function package can control the flow of function execution and support part of functional programming.&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</span></h3>

 ```go
 import "github.com/duke-git/lancet/v2/function"
@@ -687,7 +716,7 @@ import "github.com/duke-git/lancet/v2/function"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/function.md#Watcher)]
    [[play](https://go.dev/play/p/l2yrOpCLd1I)]

-### 12. Maputil package includes some functions to manipulate map.
+<h3 id="Maputil"> 12. Maputil package includes some functions to manipulate map.&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</span></h3>

 ```go
 import "github.com/duke-git/lancet/v2/maputil"
@@ -759,7 +788,7 @@ import "github.com/duke-git/lancet/v2/maputil"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#IsDisjoint)]
    [[play](https://go.dev/play/p/N9qgYg_Ho6f)]

-### 13. Mathutil package implements some functions for math calculation.
+<h3 id="Mathutil"> 13. Mathutil package implements some functions for math calculation. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</span></h3>

 ```go
 import "github.com/duke-git/lancet/v2/mathutil"
@@ -835,10 +864,12 @@ import "github.com/duke-git/lancet/v2/mathutil"
    [[play](https://go.dev/play/p/TWMQlMywDsP)]
 -   **<big>Log</big>** : returns the logarithm of base n.
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Log)]
+    [[play](https://go.dev/play/p/_d4bi8oyhat)]
 -   **<big>Sum</big>** : return sum of passed numbers.
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Sum)]
+    [[play](https://go.dev/play/p/1To2ImAMJA7)]

-### 14. Netutil package contains functions to get net information and send http request.
+<h3 id="Netutil"> 14. Netutil package contains functions to get net information and send http request. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/netutil"
@@ -911,7 +942,25 @@ import "github.com/duke-git/lancet/v2/netutil"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#IsTelnetConnected)]
    [[play](https://go.dev/play/p/yiLCGtQv_ZG)]

-### 15. Random package implements some basic functions to generate random int and string.
+<h3 id="Pointer"> 15. Pointer package contains some util functions to operate go pointer. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>
+
+```go
+import "github.com/duke-git/lancet/v2/pointer"
+```
+
+#### Function list:
+
+-   **<big>ExtractPointer</big>** : return the underlying value by the given interface type.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/pointer.md#ExtractPointer)]
+    [[play](https://go.dev/play/p/D7HFjeWU2ZP)]
+-   **<big>Of</big>** : return a pointer to the value `v`.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/pointer.md#Of)]
+    [[play](https://go.dev/play/p/HFd70x4DrMj)]
+-   **<big>Unwrap</big>** : return the value from the pointer.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/pointer.md#Unwrap)]
+    [[play](https://go.dev/play/p/cgeu3g7cjWb)]
+
+<h3 id="Random"> 16. Random package implements some basic functions to generate random int and string. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/random"
@@ -945,8 +994,9 @@ import "github.com/duke-git/lancet/v2/random"
    [[play](https://go.dev/play/p/_Z9SFmr28ft)]
 -   **<big>RandUniqueIntSlice</big>** : generate a slice of random int of length n that do not repeat.
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/random.md#RandUniqueIntSlice)]
+    [[play](https://go.dev/play/p/uBkRSOz73Ec)]

-### 16. Retry package is for executing a function repeatedly until it was successful or canceled by the context.
+<h3 id="Retry"> 17. Retry package is for executing a function repeatedly until it was successful or canceled by the context. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/retry"
@@ -970,7 +1020,7 @@ import "github.com/duke-git/lancet/v2/retry"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/retry.md#RetryTimes)]
    [[play](https://go.dev/play/p/ssfVeU2SwLO)]

-### 17. Slice contains some functions to manipulate slice.
+<h3 id="Slice"> 18. Slice contains some functions to manipulate slice. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/slice"
@@ -1183,7 +1233,7 @@ import "github.com/duke-git/lancet/v2/slice"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice.md#KeyBy)]
    [[play](https://go.dev/play/p/uXod2LWD1Kg)]

-### 18. Stream package implements a sequence of elements supporting sequential and operations. this package is an experiment to explore if stream in go can work as the way java does. its function is very limited.
+<h3 id="Stream"> 19. Stream package implements a sequence of elements supporting sequential and operations. this package is an experiment to explore if stream in go can work as the way java does. its function is very limited. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/stream"
@@ -1270,7 +1320,7 @@ import "github.com/duke-git/lancet/v2/stream"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/stream.md#ToSlice)]
    [[play](https://go.dev/play/p/jI6_iZZuVFE)]

-### 19. Structs package provides several high level functions to manipulate struct, tag, and field.
+<h3 id="Structs"> 20. Structs package provides several high level functions to manipulate struct, tag, and field. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/structs"
@@ -1303,7 +1353,7 @@ import "github.com/duke-git/lancet/v2/structs"
 -   **<big>IsSlice</big>** : check if the field is a slice
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/structs/field.md#IsSlice)]

-### 20. Strutil package contains some functions to manipulate string.
+<h3 id="Strutil"> 21. Strutil package contains some functions to manipulate string. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/strutil"
@@ -1421,7 +1471,7 @@ import "github.com/duke-git/lancet/v2/strutil"
 -   **<big>RemoveWhiteSpace</big>** : remove whitespace characters from a string.
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#RemoveWhiteSpace)]

-### 21. System package contain some functions about os, runtime, shell command.
+<h3 id="System"> 22. System package contain some functions about os, runtime, shell command. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/system"
@@ -1457,7 +1507,88 @@ import "github.com/duke-git/lancet/v2/system"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/system.md#GetOsBits)]
    [[play](https://go.dev/play/p/ml-_XH3gJbW)]

-### 22. Validator package contains some functions for data validation.
+<h3 id="Tuple"> 23. Tuple package implements tuple data type and some operations on it. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>
+
+```go
+import "github.com/duke-git/lancet/v2/tuple"
+```
+
+#### Function list:
+
+-   **<big>Tuple2</big>** : represents a 2 elemnets tuple.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple2)]
+-   **<big>Tuple2_Unbox</big>** : returns values in Tuple2.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple2_Unbox)]
+-   **<big>Zip2</big>** : create a slice of Tuple2, whose elements are correspond to the given slice elements.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Zip2)]
+-   **<big>Unzip2</big>** : create a group of slice from a slice of Tuple2.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Unzip2)]
+-   **<big>Tuple3</big>** : represents a 3 elemnets tuple.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple3)]
+-   **<big>Tuple3_Unbox</big>** : returns values in Tuple3.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple3_Unbox)]
+-   **<big>Zip3</big>** : create a slice of Tuple3, whose elements are correspond to the given slice elements.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Zip3)]
+-   **<big>Unzip3</big>** : create a group of slice from a slice of Tuple3.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Unzip3)]
+-   **<big>Tuple4</big>** : represents a 4 elemnets tuple.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple4)]
+-   **<big>Tuple4_Unbox</big>** : returns values in Tuple4.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple4_Unbox)]
+-   **<big>Zip4</big>** : create a slice of Tuple4, whose elements are correspond to the given slice elements.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Zip4)]
+-   **<big>Unzip4</big>** : create a group of slice from a slice of Tuple4.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Unzip4)]
+-   **<big>Tuple5</big>** : represents a 5 elemnets tuple.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple5)]
+-   **<big>Tuple5_Unbox</big>** : returns values in Tuple4.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple5_Unbox)]
+-   **<big>Zip5</big>** : create a slice of Tuple5, whose elements are correspond to the given slice elements.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Zip5)]
+-   **<big>Unzip5</big>** : create a group of slice from a slice of Tuple5.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Unzip5)]
+-   **<big>Tuple6</big>** : represents a 6 elemnets tuple.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple6)]
+-   **<big>Tuple6_Unbox</big>** : returns values in Tuple6.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple6_Unbox)]
+-   **<big>Zip6</big>** : create a slice of Tuple6, whose elements are correspond to the given slice elements.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Zip6)]
+-   **<big>Unzip6</big>** : create a group of slice from a slice of Tuple6.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Unzip6)]
+-   **<big>Tuple7</big>** : represents a 7 elemnets tuple.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple7)]
+-   **<big>Tuple7_Unbox</big>** : returns values in Tuple7.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple7_Unbox)]
+-   **<big>Zip7</big>** : create a slice of Tuple7, whose elements are correspond to the given slice elements.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Zip7)]
+-   **<big>Unzip7</big>** : create a group of slice from a slice of Tuple7.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Unzip7)]
+-   **<big>Tuple8</big>** : represents a 8 elemnets tuple.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple8)]
+-   **<big>Tuple8_Unbox</big>** : returns values in Tuple8.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple8_Unbox)]
+-   **<big>Zip8</big>** : create a slice of Tuple8, whose elements are correspond to the given slice elements.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Zip8)]
+-   **<big>Unzip8</big>** : create a group of slice from a slice of Tuple8.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Unzip8)]
+-   **<big>Tuple9</big>** : represents a 9 elemnets tuple.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple9)]
+-   **<big>Tuple9_Unbox</big>** : returns values in Tuple9.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple9_Unbox)]
+-   **<big>Zip9</big>** : create a slice of Tuple9, whose elements are correspond to the given slice elements.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Zip9)]
+-   **<big>Unzip9</big>** : create a group of slice from a slice of Tuple9.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Unzip9)]
+-   **<big>Tuple10</big>** : represents a 10 elemnets tuple.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple10)]
+-   **<big>Tuple10_Unbox</big>** : returns values in Tuple10.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple10_Unbox)]
+-   **<big>Zip10</big>** : create a slice of Tuple10, whose elements are correspond to the given slice elements.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Zip10)]
+-   **<big>Unzip10</big>** : create a group of slice from a slice of Tuple10.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Unzip10)]
+
+<h3 id="Validator"> 24. Validator package contains some functions for data validation. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/validator"
@@ -1565,7 +1696,7 @@ import "github.com/duke-git/lancet/v2/validator"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsPrintable)]
    [[play](https://go.dev/play/p/Pe1FE2gdtTP)]

-### 23. xerror package implements helpers for errors.
+<h3 id="Xerror"> 25. Xerror package implements helpers for errors. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/xerror"
--- a/README_zh-CN.md
+++ b/README_zh-CN.md
@@ -4,7 +4,7 @@
 <br/>

 ![Go version](https://img.shields.io/badge/go-%3E%3Dv1.18-9cf)
-[![Release](https://img.shields.io/badge/release-2.2.2-green.svg)](https://github.com/duke-git/lancet/releases)
+[![Release](https://img.shields.io/badge/release-2.2.3-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)
@@ -23,7 +23,7 @@
 ## 特性

 -   👏 全面、高效、可复用。
-   💪 500+常用 go 工具函数，支持 string、slice、datetime、net、crypt...
+-   💪 600+常用 go 工具函数，支持 string、slice、datetime、net、crypt...
 -   💅 只依赖 go 标准库和 golang.org/x。
 -   🌍 所有导出函数单元测试覆盖率 100%。

@@ -72,13 +72,41 @@ func main() {

 ## 文档

-### 1. algorithm 包实现一些基本查找和排序算法。
+### <span id="index">目录<span>
+
+-   [Algorithm](#Algorithm)
+-   [Compare](#Compare)
+-   [Concurrency](#Concurrency)
+-   [Condition](#Condition)
+-   [Convertor](#Convertor)
+-   [Cryptor](#Cryptor)
+-   [Datetime](#Datetime)
+-   [Datastructure](#Datastructure)
+-   [Fileutil](#Fileutil)
+-   [Formatter](#Formatter)
+-   [Function](#Function)
+-   [Maputil](#Maputil)
+-   [Mathutil](#Mathutil)
+-   [Netutil](#Netutil)
+-   [Pointer](#Pointer)
+-   [Random](#Random)
+-   [Retry](#Retry)
+-   [Slice](#Slice)
+-   [Stream](#Stream)
+-   [Structs](#Structs)
+-   [Strutil](#Strutil)
+-   [System](#System)
+-   [Tuple](#Tuple)
+-   [Validator](#Validator)
+-   [Xerror](#Xerror)
+
+<h3 id="Algorithm"> 1. algorithm 包实现一些基本查找和排序算法。 &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

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

-#### Function list:
+#### 函数列表:

 -   **<big>BubbleSort</big>** : 使用冒泡排序算法对切片进行排序。
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#BubbleSort)]
@@ -117,13 +145,13 @@ import "github.com/duke-git/lancet/v2/algorithm"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#LRUCache)]
    [[play](https://go.dev/play/p/-EZjgOURufP)]

-### 2. compare 包提供几个轻量级的类型比较函数。
+<h3 id="Compare"> 2. compare 包提供几个轻量级的类型比较函数。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

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

-#### Function list:
+#### 函数列表:

 -   **<big>Equal</big>** : 检查两个值是否相等(检查类型和值)。
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/compare_zh-CN.md#Equal)]
@@ -144,13 +172,13 @@ import "github.com/duke-git/lancet/v2/compare"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/compare_zh-CN.md#GreaterOrEqual)]
    [[play](https://go.dev/play/p/vx8mP0U8DFk)]

-### 3. concurrency 包含一些支持并发编程的功能。例如：goroutine, channel, async 等。
+<h3 id="Concurrency"> 3. concurrency 包含一些支持并发编程的功能。例如：goroutine, channel, async 等。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

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

-#### Function list:
+#### 函数列表:

 -   **<big>NewChannel</big>** : 返回一个 Channel 指针实例。
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#NewChannel)]
@@ -183,13 +211,13 @@ import "github.com/duke-git/lancet/v2/concurrency"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/concurrency_zh-CN.md#Tee)]
    [[play](https://go.dev/play/p/3TQPKnCirrP)]

-### 4. condition 包含一些用于条件判断的函数。
+<h3 id="Condition"> 4. condition 包含一些用于条件判断的函数。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

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

-#### Function list:
+#### 函数列表:

 -   **<big>Bool</big>** : 返回传入参数的 bool 值。
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/condition_zh-CN.md#Bool)]
@@ -216,7 +244,7 @@ import "github.com/duke-git/lancet/v2/condition"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/condition_zh-CN.md#TernaryOperator)]
    [[play](https://go.dev/play/p/ElllPZY0guT)]

-### 5. convertor 转换器包支持一些常见的数据类型转换。
+<h3 id="Convertor"> 5. convertor 转换器包支持一些常见的数据类型转换。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/convertor"
@@ -283,10 +311,12 @@ import "github.com/duke-git/lancet/v2/convertor"
    [[play](https://go.dev/play/p/syqw0-WG7Xd)]
 -   **<big>Utf8ToGbk</big>** : utf8 编码转 GBK 编码。
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#Utf8ToGbk)]
+    [[play](https://go.dev/play/p/9FlIaFLArIL)]
 -   **<big>GbkToUtf8</big>** : GBK 编码转 utf8 编码。
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#GbkToUtf8)]
+    [[play](https://go.dev/play/p/OphmHCN_9u8)]

-### 6. 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。
+<h3 id="Cryptor"> 6. 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。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/cryptor"
@@ -390,7 +420,7 @@ import "github.com/duke-git/lancet/v2/cryptor"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#RsaDecrypt)]
    [[play](https://go.dev/play/p/uef0q1fz53I)]

-### 7. datetime 日期时间处理包，格式化日期，比较日期。
+<h3 id="Datetime"> 7. datetime 日期时间处理包，格式化日期，比较日期。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/datetime"
@@ -507,7 +537,7 @@ import "github.com/duke-git/lancet/v2/datetime"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#IsWeekend)]
    [[play](https://go.dev/play/p/cupRM5aZOIY)]

-### 8. datastructure 包含一些普通的数据结构实现。例如：list, linklist, stack, queue, set, tree, graph.
+<h3 id="Datastructure"> 8. datastructure 包含一些普通的数据结构实现。例如：list, linklist, stack, queue, set, tree, graph。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

 ```go
 import list "github.com/duke-git/lancet/v2/datastructure/list"
@@ -520,7 +550,7 @@ import heap "github.com/duke-git/lancet/v2/datastructure/heap"
 import hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
 ```

-#### Function list:
+#### 函数列表:

 -   **<big>List</big>** : 线性表结构, 用切片实现。
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/datastructure/list_zh-CN.md)]
@@ -539,7 +569,7 @@ import hashmap "github.com/duke-git/lancet/v2/datastructure/hashmap"
 -   **<big>Hashmap</big>** : 哈希映射。
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/datastructure/hashmap_zh-CN.md)]

-### 9. fileutil 包含文件基本操作。
+<h3 id="Fileutil"> 9. fileutil 包含文件基本操作。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/fileutil"
@@ -614,6 +644,7 @@ import "github.com/duke-git/lancet/v2/fileutil"
    [[play](https://go.dev/play/p/OExTkhGEd3_u)]
 -   **<big>WriteCsvFile</big>** : 向 csv 文件写入内容。
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#WriteCsvFile)]
+    [[play](https://go.dev/play/p/dAXm58Q5U1o)]
 -   **<big>WriteBytesToFile</big>** : 将 bytes 写入文件。
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#WriteBytesToFile)]
    [[play](https://go.dev/play/p/s7QlDxMj3P8)]
@@ -621,7 +652,7 @@ import "github.com/duke-git/lancet/v2/fileutil"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#WriteStringToFile)]
    [[play](https://go.dev/play/p/GhLS6d8lH_g)]

-### 10. formatter 格式化器包含一些数据格式化处理方法。
+<h3 id="Formatter"> 10. formatter 格式化器包含一些数据格式化处理方法。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/formatter"
@@ -651,7 +682,7 @@ import "github.com/duke-git/lancet/v2/formatter"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/formatter_zh-CN.md#ParseBinaryBytes)]
    [[play](https://go.dev/play/p/69v1tTT62x8)]

-### 11. function 函数包控制函数执行流程，包含部分函数式编程。
+<h3 id="Function"> 11. function 函数包控制函数执行流程，包含部分函数式编程。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/function"
@@ -687,7 +718,7 @@ import "github.com/duke-git/lancet/v2/function"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Watcher)]
    [[play](https://go.dev/play/p/l2yrOpCLd1I)]

-### 12. maputil 包括一些操作 map 的函数.
+<h3 id="Maputil"> 12. maputil 包括一些操作 map 的函数。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/maputil"
@@ -759,13 +790,13 @@ import "github.com/duke-git/lancet/v2/maputil"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/maputil_zh-CN.md#IsDisjoint)]
    [[play](https://go.dev/play/p/N9qgYg_Ho6f)]

-### 13. mathutil 包实现了一些数学计算的函数。
+<h3 id="Mathutil"> 13. mathutil 包实现了一些数学计算的函数。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

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

-#### Function list:
+#### 函数列表:

 -   **<big>Average</big>** :计算平均数，可能需要对结果调用 RoundToFloat 方法四舍五入。
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Average)]
@@ -835,10 +866,12 @@ import "github.com/duke-git/lancet/v2/mathutil"
    [[play](https://go.dev/play/p/TWMQlMywDsP)]
 -   **<big>Log</big>** : 计算以 base 为底 n 的对数。
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Log)]
+    [[play](https://go.dev/play/p/_d4bi8oyhat)]
 -   **<big>Sum</big>** : 求传入参数之和。
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Sum)]
+    [[play](https://go.dev/play/p/1To2ImAMJA7)]

-### 14. netutil 网络包支持获取 ip 地址，发送 http 请求。
+<h3 id="Netutil"> 14. netutil 网络包支持获取 ip 地址，发送 http 请求。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/netutil"
@@ -911,7 +944,25 @@ import "github.com/duke-git/lancet/v2/netutil"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#IsTelnetConnected)]
    [[play](https://go.dev/play/p/yiLCGtQv_ZG)]

-### 15. random 随机数生成器包，可以生成随机[]bytes, int, string。
+<h3 id="Pointer"> 15. pointer 包支持一些指针类型的操作。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>
+
+```go
+import "github.com/duke-git/lancet/v2/pointer"
+```
+
+#### 函数列表:
+
+-   **<big>ExtractPointer</big>** : 返回传入 interface 的底层值。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/pointer_zh-CN.md#ExtractPointer)]
+    [[play](https://go.dev/play/p/D7HFjeWU2ZP)]
+-   **<big>Of</big>** : 返回传入参数的指针值。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/pointer_zh-CN.md#Of)]
+    [[play](https://go.dev/play/p/HFd70x4DrMj)]
+-   **<big>Unwrap</big>** : 返回传入指针指向的值。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/pointer_zh-CN.md#Unwrap)]
+    [[play](https://go.dev/play/p/cgeu3g7cjWb)]
+
+<h3 id="Random"> 16. random 随机数生成器包，可以生成随机[]bytes, int, string。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/random"
@@ -943,10 +994,11 @@ import "github.com/duke-git/lancet/v2/random"
 -   **<big>UUIdV4</big>** : 生成 UUID v4 字符串。
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/random_zh-CN.md#UUIdV4)]
    [[play](https://go.dev/play/p/_Z9SFmr28ft)]
-   **<big>RandUniqueIntSlice</big>** : 生成一个不重复的长度为n的随机int切片。
+-   **<big>RandUniqueIntSlice</big>** : 生成一个不重复的长度为 n 的随机 int 切片。
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/random_zh-CN.md#RandUniqueIntSlice)]
+    [[play](https://go.dev/play/p/uBkRSOz73Ec)]

-### 16. retry 重试执行函数直到函数运行成功或被 context cancel。
+<h3 id="Retry"> 17. retry 重试执行函数直到函数运行成功或被 context cancel。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/retry"
@@ -970,7 +1022,7 @@ import "github.com/duke-git/lancet/v2/retry"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#RetryTimes)]
    [[play](https://go.dev/play/p/ssfVeU2SwLO)]

-### 17. slice 包含操作切片的方法集合。
+<h3 id="Slice"> 18. slice 包含操作切片的方法集合。</span>&nbsp; &nbsp; &nbsp; &nbsp; [回到目录](#index)

 ```go
 import "github.com/duke-git/lancet/v2/slice"
@@ -1183,13 +1235,13 @@ import "github.com/duke-git/lancet/v2/slice"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#KeyBy)]
    [[play](https://go.dev/play/p/uXod2LWD1Kg)]

-### 18. Stream 流，该包仅验证简单的 stream 实现，功能有限。
+<h3 id="Stream"> 19. stream 流，该包仅验证简单的 stream 实现，功能有限。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

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

-#### Function list:
+#### 函数列表:

 -   **<big>Of</big>** : 创建元素为指定值的 stream。
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/stream_zh-CN.md#Of)]
@@ -1270,13 +1322,13 @@ import "github.com/duke-git/lancet/v2/stream"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/stream_zh-CN.md#ToSlice)]
    [[play](https://go.dev/play/p/jI6_iZZuVFE)]

-### 19. structs 提供操作 struct, tag, field 的相关函数。
+<h3 id="Structs"> 20. structs 提供操作 struct, tag, field 的相关函数。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

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

-#### Function list:
+#### 函数列表:

 -   **<big>New</big>** : `Struct`结构体的构造函数。
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/structs/struct_zh-CN.md#New)]
@@ -1305,7 +1357,7 @@ import "github.com/duke-git/lancet/v2/structs"
 -   **<big>IsSlice</big>** : 判断属性是否是切片。
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/structs/field_zh-CN.md#IsSlice)]

-### 20. strutil 包含字符串处理的相关函数。
+<h3 id="Strutil"> 21. strutil 包含字符串处理的相关函数。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/strutil"
@@ -1424,7 +1476,7 @@ import "github.com/duke-git/lancet/v2/strutil"
 -   **<big>RemoveWhiteSpace</big>** : 删除字符串中的空格。
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#RemoveWhiteSpace)]

-### 21. system 包含 os, runtime, shell command 的相关函数。
+<h3 id="System"> 22. system 包含 os, runtime, shell command 的相关函数。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/system"
@@ -1460,7 +1512,88 @@ import "github.com/duke-git/lancet/v2/system"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN#GetOsBits)]
    [[play](https://go.dev/play/p/ml-_XH3gJbW)]

-### 22. validator 验证器包，包含常用字符串格式验证函数。
+<h3 id="Tuple"> 23. Tuple 包实现一个元组数据类型。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>
+
+```go
+import "github.com/duke-git/lancet/v2/tuple"
+```
+
+#### 函数列表:
+
+-   **<big>Tuple2</big>** : 2 元元组
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple2)]
+-   **<big>Tuple2_Unbox</big>** : 返回 2 元元组的字段值。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple2_Unbox)]
+-   **<big>Zip2</big>** : 创建一个 Tuple2 元组切片, 其中元组的元素和传入切片元素相对应。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Zip2)]
+-   **<big>Unzip2</big>** : 根据传入的Tuple2切片，创建一组和Tuple2元素相对应的切片。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Unzip2)]
+-   **<big>Tuple3</big>** : 3 元元组
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple3)]
+-   **<big>Tuple3_Unbox</big>** : 返回 3 元元组的字段值。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple3_Unbox)]
+-   **<big>Zip3</big>** : 创建一个 Tuple3 元组切片, 其中元组的元素和传入切片元素相对应。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Zip3)]
+-   **<big>Unzip3</big>** : 根据传入的Tuple3切片，创建一组和Tuple3元素相对应的切片。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Unzip3)]
+-   **<big>Tuple4</big>** : 4 元元组
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple4)]
+-   **<big>Tuple4_Unbox</big>** : 返回 4 元元组的字段值。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple4_Unbox)]
+-   **<big>Zip4</big>** : 创建一个 Tuple4 元组切片, 其中元组的元素和传入切片元素相对应。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Zip4)]
+-   **<big>Unzip4</big>** : 根据传入的Tuple4切片，创建一组和Tuple4元素相对应的切片。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Unzip4)]
+-   **<big>Tuple5</big>** : 5 元元组
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple5)]
+-   **<big>Tuple5_Unbox</big>** : 返回 5 元元组的字段值。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple5_Unbox)]
+-   **<big>Zip5</big>** : 创建一个 Tuple5 元组切片, 其中元组的元素和传入切片元素相对应。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Zip5)]
+-   **<big>Unzip5</big>** : 根据传入的Tuple5切片，创建一组和Tuple5元素相对应的切片。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Unzip5)]
+-   **<big>Tuple6</big>** : 6 元元组
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple6)]
+-   **<big>Tuple6_Unbox</big>** : 返回 6 元元组的字段值。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple6_Unbox)]
+-   **<big>Zip6</big>** : 创建一个 Tuple6 元组切片, 其中元组的元素和传入切片元素相对应。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Zip6)]
+-   **<big>Unzip6</big>** : 根据传入的Tuple6切片，创建一组和Tuple6元素相对应的切片。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Unzip6)]
+-   **<big>Tuple7</big>** : 7 元元组
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple7)]
+-   **<big>Tuple7_Unbox</big>** : 返回 7 元元组的字段值。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple7_Unbox)]
+-   **<big>Zip7</big>** : 创建一个 Tuple7 元组切片, 其中元组的元素和传入切片元素相对应。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Zip7)]
+-   **<big>Unzip7</big>** : 根据传入的Tuple7切片，创建一组和Tuple7元素相对应的切片。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Unzip7)]
+-   **<big>Tuple8</big>** : 8 元元组
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple8)]
+-   **<big>Tuple8_Unbox</big>** : 返回 8 元元组的字段值。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple8_Unbox)]
+-   **<big>Zip8</big>** : 创建一个 Tuple8 元组切片, 其中元组的元素和传入切片元素相对应。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Zip8)]
+-   **<big>Unzip8</big>** : 根据传入的Tuple8切片，创建一组和Tuple8元素相对应的切片。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Unzip8)]
+-   **<big>Tuple9</big>** : 9 元元组
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple9)]
+-   **<big>Tuple9_Unbox</big>** : 返回 9 元元组的字段值。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple9_Unbox)]
+-   **<big>Zip9</big>** : 创建一个 Tuple9 元组切片, 其中元组的元素和传入切片元素相对应。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Zip9)]
+-   **<big>Unzip9</big>** : 根据传入的Tuple9切片，创建一组和Tuple9元素相对应的切片。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Unzip9)]
+-   **<big>Tuple10</big>** : 10 元元组
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple10)]
+-   **<big>Tuple10_Unbox</big>** : 返回 10 元元组的字段值。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple10_Unbox)]
+-   **<big>Zip10</big>** : 创建一个 Tuple10 元组切片, 其中元组的元素和传入切片元素相对应。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Zip10)]
+-   **<big>Unzip10</big>** : 根据传入的Tuple10切片，创建一组和Tuple10元素相对应的切片。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Unzip10)]
+
+<h3 id="Validator"> 24. validator 验证器包，包含常用字符串格式验证函数。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/validator"
@@ -1568,7 +1701,7 @@ import "github.com/duke-git/lancet/v2/validator"
    [[doc](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsPrintable)]
    [[play](https://go.dev/play/p/Pe1FE2gdtTP)]

-### 23. xerror 包实现一些错误处理函数
+<h3 id="Xerror"> 25. xerror 包实现一些错误处理函数。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>

 ```go
 import "github.com/duke-git/lancet/v2/xerror"
--- a/algorithm/lrucache_test.go
+++ b/algorithm/lrucache_test.go
@@ -7,6 +7,7 @@ import (
 )

 func TestLRUCache(t *testing.T) {
+	t.Parallel()
 	asssert := internal.NewAssert(t, "TestLRUCache")

 	cache := NewLRUCache[int, int](3)
--- a/algorithm/search_test.go
+++ b/algorithm/search_test.go
@@ -7,6 +7,7 @@ import (
 )

 func TestLinearSearch(t *testing.T) {
+	t.Parallel()
 	asssert := internal.NewAssert(t, "TestLinearSearch")

 	numbers := []int{3, 4, 5, 3, 2, 1}
@@ -19,6 +20,7 @@ func TestLinearSearch(t *testing.T) {
 }

 func TestBinarySearch(t *testing.T) {
+	t.Parallel()
 	asssert := internal.NewAssert(t, "TestBinarySearch")

 	sortedNumbers := []int{1, 2, 3, 4, 5, 6, 7, 8}
--- a/algorithm/sort_test.go
+++ b/algorithm/sort_test.go
@@ -46,6 +46,7 @@ func (c *intComparator) Compare(v1 any, v2 any) int {
 }

 func TestBubbleSortForStructSlice(t *testing.T) {
+	t.Parallel()
 	asssert := internal.NewAssert(t, "TestBubbleSortForStructSlice")

 	peoples := []people{
@@ -65,6 +66,7 @@ func TestBubbleSortForStructSlice(t *testing.T) {
 }

 func TestBubbleSortForIntSlice(t *testing.T) {
+	t.Parallel()
 	asssert := internal.NewAssert(t, "TestBubbleSortForIntSlice")

 	numbers := []int{2, 1, 5, 3, 6, 4}
@@ -75,6 +77,7 @@ func TestBubbleSortForIntSlice(t *testing.T) {
 }

 func TestInsertionSort(t *testing.T) {
+	t.Parallel()
 	asssert := internal.NewAssert(t, "TestInsertionSort")

 	peoples := []people{
@@ -94,6 +97,7 @@ func TestInsertionSort(t *testing.T) {
 }

 func TestSelectionSort(t *testing.T) {
+	t.Parallel()
 	asssert := internal.NewAssert(t, "TestSelectionSort")

 	peoples := []people{
@@ -113,6 +117,7 @@ func TestSelectionSort(t *testing.T) {
 }

 func TestShellSort(t *testing.T) {
+	t.Parallel()
 	asssert := internal.NewAssert(t, "TestShellSort")

 	peoples := []people{
@@ -132,6 +137,7 @@ func TestShellSort(t *testing.T) {
 }

 func TestQuickSort(t *testing.T) {
+	t.Parallel()
 	asssert := internal.NewAssert(t, "TestQuickSort")

 	peoples := []people{
@@ -151,6 +157,7 @@ func TestQuickSort(t *testing.T) {
 }

 func TestHeapSort(t *testing.T) {
+	t.Parallel()
 	asssert := internal.NewAssert(t, "TestHeapSort")

 	peoples := []people{
@@ -170,6 +177,7 @@ func TestHeapSort(t *testing.T) {
 }

 func TestMergeSort(t *testing.T) {
+	t.Parallel()
 	asssert := internal.NewAssert(t, "TestMergeSort")

 	peoples := []people{
@@ -189,6 +197,7 @@ func TestMergeSort(t *testing.T) {
 }

 func TestCountSort(t *testing.T) {
+	t.Parallel()
 	asssert := internal.NewAssert(t, "TestCountSort")

 	peoples := []people{
--- a/compare/compare_test.go
+++ b/compare/compare_test.go
@@ -8,6 +8,7 @@ import (
 )

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

 	assert.Equal(true, Equal(1, 1))
@@ -60,6 +61,7 @@ func TestEqual(t *testing.T) {
 }

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

 	assert.Equal(true, EqualValue(1, 1))
@@ -70,6 +72,7 @@ func TestEqualValue(t *testing.T) {
 }

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

 	assert.Equal(true, LessThan(1, 2))
@@ -85,6 +88,7 @@ func TestLessThan(t *testing.T) {
 }

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

 	assert.Equal(true, GreaterThan(2, 1))
@@ -101,6 +105,7 @@ func TestGreaterThan(t *testing.T) {
 }

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

 	assert.Equal(true, LessOrEqual(1, 2))
@@ -117,6 +122,7 @@ func TestLessOrEqual(t *testing.T) {
 }

 func TestGreaterOrEqual(t *testing.T) {
+	t.Parallel()
 	assert := internal.NewAssert(t, "TestGreaterThan")

 	assert.Equal(true, GreaterOrEqual(2, 1))
--- a/concurrency/channel_test.go
+++ b/concurrency/channel_test.go
@@ -9,6 +9,7 @@ import (
 )

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

 	ctx, cancel := context.WithCancel(context.Background())
@@ -23,6 +24,7 @@ func TestGenerate(t *testing.T) {
 }

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

 	ctx, cancel := context.WithCancel(context.Background())
@@ -39,6 +41,7 @@ func TestRepeat(t *testing.T) {
 }

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

 	ctx, cancel := context.WithCancel(context.Background())
@@ -57,6 +60,7 @@ func TestRepeatFn(t *testing.T) {
 }

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

 	ctx, cancel := context.WithCancel(context.Background())
@@ -79,6 +83,7 @@ func TestTake(t *testing.T) {
 }

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

 	ctx, cancel := context.WithCancel(context.Background())
@@ -101,6 +106,7 @@ func TestFanIn(t *testing.T) {
 }

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

 	sig := func(after time.Duration) <-chan any {
@@ -127,6 +133,7 @@ func TestOr(t *testing.T) {
 }

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

 	ctx, cancel := context.WithCancel(context.Background())
@@ -141,6 +148,7 @@ func TestOrDone(t *testing.T) {
 }

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

 	ctx, cancel := context.WithCancel(context.Background())
@@ -159,6 +167,7 @@ func TestTee(t *testing.T) {
 }

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

 	ctx, cancel := context.WithCancel(context.Background())
--- a/condition/condition_test.go
+++ b/condition/condition_test.go
@@ -11,6 +11,8 @@ import (
 type TestStruct struct{}

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

 	// bool
@@ -63,6 +65,8 @@ func TestBool(t *testing.T) {
 }

 func TestAnd(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestAnd")
 	assert.Equal(false, And(0, 1))
 	assert.Equal(false, And(0, ""))
@@ -71,6 +75,8 @@ func TestAnd(t *testing.T) {
 }

 func TestOr(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestOr")
 	assert.Equal(false, Or(0, ""))
 	assert.Equal(true, Or(0, 1))
@@ -79,6 +85,8 @@ func TestOr(t *testing.T) {
 }

 func TestXor(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestOr")
 	assert.Equal(false, Xor(0, 0))
 	assert.Equal(true, Xor(0, 1))
@@ -87,6 +95,8 @@ func TestXor(t *testing.T) {
 }

 func TestNor(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestNor")
 	assert.Equal(true, Nor(0, 0))
 	assert.Equal(false, Nor(0, 1))
@@ -95,6 +105,8 @@ func TestNor(t *testing.T) {
 }

 func TestXnor(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestXnor")
 	assert.Equal(true, Xnor(0, 0))
 	assert.Equal(false, Xnor(0, 1))
@@ -103,6 +115,8 @@ func TestXnor(t *testing.T) {
 }

 func TestNand(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestNand")
 	assert.Equal(true, Nand(0, 0))
 	assert.Equal(true, Nand(0, 1))
@@ -111,7 +125,10 @@ func TestNand(t *testing.T) {
 }

 func TestTernaryOperator(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TernaryOperator")
+
 	trueValue := "1"
 	falseValue := "0"

--- a/convertor/convertor.go
+++ b/convertor/convertor.go
@@ -380,7 +380,7 @@ func ToInterface(v reflect.Value) (value interface{}, ok bool) {
 }

 // Utf8ToGbk convert utf8 encoding data to GBK encoding data.
-// Play: todo
+// Play: https://go.dev/play/p/9FlIaFLArIL
 func Utf8ToGbk(bs []byte) ([]byte, error) {
 	r := transform.NewReader(bytes.NewReader(bs), simplifiedchinese.GBK.NewEncoder())
 	b, err := io.ReadAll(r)
@@ -388,7 +388,7 @@ func Utf8ToGbk(bs []byte) ([]byte, error) {
 }

 // GbkToUtf8 convert GBK encoding data to utf8 encoding data.
-// Play: todo
+// Play: https://go.dev/play/p/OphmHCN_9u8
 func GbkToUtf8(bs []byte) ([]byte, error) {
 	r := transform.NewReader(bytes.NewReader(bs), simplifiedchinese.GBK.NewDecoder())
 	b, err := io.ReadAll(r)
--- a/convertor/convertor_test.go
+++ b/convertor/convertor_test.go
@@ -13,6 +13,8 @@ import (
 )

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

 	cases := []string{"", "abc", "1 2#3"}
@@ -27,6 +29,8 @@ func TestToChar(t *testing.T) {
 }

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

 	ch := ToChannel([]int{1, 2, 3})
@@ -39,6 +43,8 @@ func TestToChannel(t *testing.T) {
 }

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

 	cases := []string{"1", "true", "True", "false", "False", "0", "123", "0.0", "abc"}
@@ -51,6 +57,8 @@ func TestToBool(t *testing.T) {
 }

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

 	cases := []any{
@@ -77,6 +85,8 @@ func TestToBytes(t *testing.T) {
 }

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

 	cases := []any{"123", "-123", 123,
@@ -93,6 +103,8 @@ func TestToInt(t *testing.T) {
 }

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

 	cases := []any{
@@ -111,6 +123,8 @@ func TestToFloat(t *testing.T) {
 }

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

 	aMap := make(map[string]int)
@@ -146,6 +160,8 @@ func TestToString(t *testing.T) {
 	}
 }
 func TestToJson(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestToJson")

 	var aMap = map[string]int{"a": 1, "b": 2, "c": 3}
@@ -161,6 +177,8 @@ func TestToJson(t *testing.T) {
 }

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

 	type Message struct {
@@ -180,6 +198,8 @@ func TestToMap(t *testing.T) {
 }

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

 	t.Run("StructToMap", func(_ *testing.T) {
@@ -215,6 +235,8 @@ func TestStructToMap(t *testing.T) {
 }

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

 	aMap := map[string]int{"a": 1, "b": 2, "c": 3}
@@ -229,6 +251,8 @@ func TestMapToSlice(t *testing.T) {
 }

 func TestColorHexToRGB(t *testing.T) {
+	t.Parallel()
+
 	colorHex := "#003366"
 	r, g, b := ColorHexToRGB(colorHex)
 	colorRGB := fmt.Sprintf("%d,%d,%d", r, g, b)
@@ -239,6 +263,8 @@ func TestColorHexToRGB(t *testing.T) {
 }

 func TestColorRGBToHex(t *testing.T) {
+	t.Parallel()
+
 	r := 0
 	g := 51
 	b := 102
@@ -250,6 +276,8 @@ func TestColorRGBToHex(t *testing.T) {
 }

 func TestToPointer(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestToPointer")
 	result := ToPointer(123)

@@ -257,6 +285,8 @@ func TestToPointer(t *testing.T) {
 }

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

 	byteData, _ := EncodeByte("abc")
@@ -266,6 +296,8 @@ func TestEncodeByte(t *testing.T) {
 }

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

 	var obj string
@@ -276,6 +308,8 @@ func TestDecodeByte(t *testing.T) {
 }

 func TestDeepClone(t *testing.T) {
+	t.Parallel()
+
 	// assert := internal.NewAssert(t, "TestDeepClone")

 	type Struct struct {
@@ -319,6 +353,8 @@ func TestDeepClone(t *testing.T) {
 }

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

 	type Disk struct {
@@ -371,6 +407,8 @@ func TestCopyProperties(t *testing.T) {
 }

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

 	cases := []reflect.Value{
@@ -400,6 +438,7 @@ func TestToInterface(t *testing.T) {
 }

 func TestUtf8ToGbk(t *testing.T) {
+	t.Parallel()
 	assert := internal.NewAssert(t, "TestUtf8ToGbk")

 	utf8Data := []byte("hello")
@@ -411,6 +450,7 @@ func TestUtf8ToGbk(t *testing.T) {
 }

 func TestGbkToUtf8(t *testing.T) {
+	t.Parallel()
 	assert := internal.NewAssert(t, "TestGbkToUtf8")

 	gbkData, err := Utf8ToGbk([]byte("hello"))
--- a/cryptor/basic.go
+++ b/cryptor/basic.go
@@ -40,6 +40,14 @@ func Md5String(s string) string {
 	return hex.EncodeToString(h.Sum(nil))
 }

+// Md5String return the md5 string of byte slice.
+// Play: todo
+func Md5Byte(data []byte) string {
+	h := md5.New()
+	h.Write(data)
+	return hex.EncodeToString(h.Sum(nil))
+}
+
 // Md5File return the md5 value of file.
 func Md5File(filename string) (string, error) {
 	if fileInfo, err := os.Stat(filename); err != nil {
--- a/cryptor/basic_test.go
+++ b/cryptor/basic_test.go
@@ -7,21 +7,37 @@ import (
 )

 func TestBase64StdEncode(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestBase64StdEncode")
 	assert.Equal("aGVsbG8gd29ybGQ=", Base64StdEncode("hello world"))
 }

 func TestBase64StdDecode(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestBase64StdDecode")
 	assert.Equal("hello world", Base64StdDecode("aGVsbG8gd29ybGQ="))
 }

 func TestMd5String(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestMd5String")
 	assert.Equal("5d41402abc4b2a76b9719d911017c592", Md5String("hello"))
 }

+func TestMd5Byte(t *testing.T) {
+	t.Parallel()
+
+	assert := internal.NewAssert(t, "TestMd5Byte")
+	data := []byte{'a'}
+	assert.Equal("0cc175b9c0f1b6a831c399e269772661", Md5Byte(data))
+}
+
 func TestMd5File(t *testing.T) {
+	t.Parallel()
+
 	fileMd5, err := Md5File("./basic.go")
 	assert := internal.NewAssert(t, "TestMd5File")
 	assert.IsNotNil(fileMd5)
@@ -29,11 +45,15 @@ func TestMd5File(t *testing.T) {
 }

 func TestHmacMd5(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestHmacMd5")
 	assert.Equal("5f4c9faaff0a1ad3007d9ddc06abe36d", HmacMd5("hello world", "12345"))
 }

 func TestHmacSha1(t *testing.T) {
+	t.Parallel()
+
 	s := "hello world"
 	key := "12345"
 	hmacSha1 := HmacSha1(s, key)
@@ -44,6 +64,8 @@ func TestHmacSha1(t *testing.T) {
 }

 func TestHmacSha256(t *testing.T) {
+	t.Parallel()
+
 	s := "hello world"
 	key := "12345"
 	hmacSha256 := HmacSha256(s, key)
@@ -54,6 +76,8 @@ func TestHmacSha256(t *testing.T) {
 }

 func TestHmacSha512(t *testing.T) {
+	t.Parallel()
+
 	s := "hello world"
 	key := "12345"
 	hmacSha512 := HmacSha512(s, key)
@@ -64,6 +88,8 @@ func TestHmacSha512(t *testing.T) {
 }

 func TestSha1(t *testing.T) {
+	t.Parallel()
+
 	s := "hello world"
 	sha1 := Sha1(s)
 	expected := "2aae6c35c94fcfb415dbe95f408b9ce91ee846ed"
@@ -73,6 +99,8 @@ func TestSha1(t *testing.T) {
 }

 func TestSha256(t *testing.T) {
+	t.Parallel()
+
 	s := "hello world"
 	sha256 := Sha256(s)
 	expected := "b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9"
@@ -82,6 +110,8 @@ func TestSha256(t *testing.T) {
 }

 func TestSha512(t *testing.T) {
+	t.Parallel()
+
 	s := "hello world"
 	sha512 := Sha512(s)
 	expected := "309ecc489c12d6eb4cc40f50c902f2b4d0ed77ee511a7c7a9bcd3ca86d4cd86f989dd35bc5ff499670da34255b45b0cfd830e81f605dcf7dc5542e93ae9cd76f"
--- a/cryptor/crypto_example_test.go
+++ b/cryptor/crypto_example_test.go
@@ -366,21 +366,22 @@ func ExampleHmacSha512() {
 }

 func ExampleMd5String() {
-	str := "hello"
-
-	md5Str := Md5String(str)
-
+	md5Str := Md5String("hello")
 	fmt.Println(md5Str)

 	// Output:
 	// 5d41402abc4b2a76b9719d911017c592
 }

+func ExampleMd5Byte() {
+	md5Str := Md5Byte([]byte{'a'})
+	fmt.Println(md5Str)
+
+	// Output:
+	// 0cc175b9c0f1b6a831c399e269772661
+}
 func ExampleSha1() {
-	str := "hello"
-
-	result := Sha1(str)
-
+	result := Sha1("hello")
 	fmt.Println(result)

 	// Output:
@@ -388,10 +389,7 @@ func ExampleSha1() {
 }

 func ExampleSha256() {
-	str := "hello"
-
-	result := Sha256(str)
-
+	result := Sha256("hello")
 	fmt.Println(result)

 	// Output:
@@ -399,10 +397,7 @@ func ExampleSha256() {
 }

 func ExampleSha512() {
-	str := "hello"
-
-	result := Sha512(str)
-
+	result := Sha512("hello")
 	fmt.Println(result)

 	// Output:
--- a/cryptor/encrypt_test.go
+++ b/cryptor/encrypt_test.go
@@ -7,6 +7,8 @@ import (
 )

 func TestAesEcbEncrypt(t *testing.T) {
+	t.Parallel()
+
 	data := "hello world"
 	key := "abcdefghijklmnop"

@@ -18,6 +20,8 @@ func TestAesEcbEncrypt(t *testing.T) {
 }

 func TestAesCbcEncrypt(t *testing.T) {
+	t.Parallel()
+
 	data := "hello world"
 	key := "abcdefghijklmnop"

@@ -29,6 +33,8 @@ func TestAesCbcEncrypt(t *testing.T) {
 }

 func TestAesCtrCrypt(t *testing.T) {
+	t.Parallel()
+
 	data := "hello world"
 	key := "abcdefghijklmnop"

@@ -40,6 +46,8 @@ func TestAesCtrCrypt(t *testing.T) {
 }

 func TestAesCfbEncrypt(t *testing.T) {
+	t.Parallel()
+
 	data := "hello world"
 	key := "abcdefghijklmnop"

@@ -51,6 +59,8 @@ func TestAesCfbEncrypt(t *testing.T) {
 }

 func TestAesOfbEncrypt(t *testing.T) {
+	t.Parallel()
+
 	data := "hello world"
 	key := "abcdefghijklmnop"

@@ -62,6 +72,8 @@ func TestAesOfbEncrypt(t *testing.T) {
 }

 func TestDesEcbEncrypt(t *testing.T) {
+	t.Parallel()
+
 	data := "hello world"
 	key := "abcdefgh"

@@ -73,6 +85,8 @@ func TestDesEcbEncrypt(t *testing.T) {
 }

 func TestDesCbcEncrypt(t *testing.T) {
+	t.Parallel()
+
 	data := "hello world"
 	key := "abcdefgh"

@@ -84,6 +98,8 @@ func TestDesCbcEncrypt(t *testing.T) {
 }

 func TestDesCtrCrypt(t *testing.T) {
+	t.Parallel()
+
 	data := "hello world"
 	key := "abcdefgh"

@@ -95,6 +111,8 @@ func TestDesCtrCrypt(t *testing.T) {
 }

 func TestDesCfbEncrypt(t *testing.T) {
+	t.Parallel()
+
 	data := "hello world"
 	key := "abcdefgh"

@@ -106,6 +124,8 @@ func TestDesCfbEncrypt(t *testing.T) {
 }

 func TestDesOfbEncrypt(t *testing.T) {
+	t.Parallel()
+
 	data := "hello world"
 	key := "abcdefgh"

@@ -117,6 +137,8 @@ func TestDesOfbEncrypt(t *testing.T) {
 }

 func TestRsaEncrypt(t *testing.T) {
+	t.Parallel()
+
 	err := GenerateRsaKey(4096, "rsa_private.pem", "rsa_public.pem")
 	if err != nil {
 		t.FailNow()
--- a/datastructure/hashmap/hashmap_test.go
+++ b/datastructure/hashmap/hashmap_test.go
@@ -32,6 +32,8 @@ func TestHashMap_Resize(t *testing.T) {
 }

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

 	hm := NewHashMap()
@@ -44,6 +46,8 @@ func TestHashMap_Delete(t *testing.T) {
 }

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

 	hm := NewHashMap()
@@ -54,6 +58,8 @@ func TestHashMap_Contains(t *testing.T) {
 }

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

 	hm := NewHashMap()
--- a/datastructure/heap/maxheap_test.go
+++ b/datastructure/heap/maxheap_test.go
@@ -21,6 +21,8 @@ func (c *intComparator) Compare(v1, v2 any) int {
 }

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

 	values := []int{6, 5, 2, 4, 7, 10, 12, 1, 3, 8, 9, 11}
@@ -33,6 +35,8 @@ func TestMaxHeap_BuildMaxHeap(t *testing.T) {
 }

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

 	heap := NewMaxHeap[int](&intComparator{})
@@ -51,6 +55,8 @@ func TestMaxHeap_Push(t *testing.T) {
 }

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

 	heap := NewMaxHeap[int](&intComparator{})
@@ -70,6 +76,8 @@ func TestMaxHeap_Pop(t *testing.T) {
 }

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

 	heap := NewMaxHeap[int](&intComparator{})
--- a/datastructure/link/doublylink_test.go
+++ b/datastructure/link/doublylink_test.go
@@ -7,6 +7,8 @@ import (
 )

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

 	link := NewDoublyLink[int]()
@@ -22,6 +24,8 @@ func TestDoublyLink_InsertAtFirst(t *testing.T) {
 }

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

 	link := NewDoublyLink[int]()
@@ -37,12 +41,12 @@ func TestDoublyLink_InsertAtTail(t *testing.T) {
 }

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

 	link := NewDoublyLink[int]()
-
 	link.InsertAt(1, 1) //do nothing
-
 	link.InsertAt(0, 1)
 	link.InsertAt(1, 2)
 	link.InsertAt(2, 4)
@@ -55,6 +59,8 @@ func TestDoublyLink_InsertAt(t *testing.T) {
 }

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

 	link := NewDoublyLink[int]()
@@ -74,6 +80,8 @@ func TestDoublyLink_DeleteAtHead(t *testing.T) {
 }

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

 	link := NewDoublyLink[int]()
@@ -93,6 +101,8 @@ func TestDoublyLink_DeleteAtTail(t *testing.T) {
 }

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

 	link := NewDoublyLink[int]()
@@ -116,6 +126,8 @@ func TestDoublyLink_DeleteAt(t *testing.T) {
 }

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

 	link := NewDoublyLink[int]()
@@ -130,6 +142,8 @@ func TestDoublyLink_Reverse(t *testing.T) {
 }

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

 	link := NewDoublyLink[int]()
@@ -149,10 +163,11 @@ func TestDoublyLink_GetMiddleNode(t *testing.T) {
 }

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

 	link := NewDoublyLink[int]()
-
 	assert.Equal(true, link.IsEmpty())
 	assert.Equal(0, link.Size())

--- a/datastructure/link/singlylink_test.go
+++ b/datastructure/link/singlylink_test.go
@@ -7,6 +7,8 @@ import (
 )

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

 	link := NewSinglyLink[int]()
@@ -22,6 +24,8 @@ func TestSinglyLink_InsertAtFirst(t *testing.T) {
 }

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

 	link := NewSinglyLink[int]()
@@ -37,6 +41,8 @@ func TestSinglyLink_InsertAtTail(t *testing.T) {
 }

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

 	link := NewSinglyLink[int]()
@@ -57,6 +63,8 @@ func TestSinglyLink_InsertAt(t *testing.T) {
 }

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

 	link := NewSinglyLink[int]()
@@ -78,10 +86,11 @@ func TestSinglyLink_DeleteAtHead(t *testing.T) {
 }

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

 	link := NewSinglyLink[int]()
-
 	link.InsertAtTail(1)
 	link.InsertAtTail(2)
 	link.InsertAtTail(3)
@@ -96,10 +105,11 @@ func TestSinglyLink_DeleteAtTail(t *testing.T) {
 }

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

 	link := NewSinglyLink[int]()
-
 	link.InsertAtTail(1)
 	link.InsertAtTail(2)
 	link.InsertAtTail(2)
@@ -114,10 +124,11 @@ func TestSinglyLink_DeleteValue(t *testing.T) {
 }

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

 	link := NewSinglyLink[int]()
-
 	link.InsertAtTail(1)
 	link.InsertAtTail(2)
 	link.InsertAtTail(3)
@@ -136,6 +147,8 @@ func TestSinglyLink_DeleteAt(t *testing.T) {
 }

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

 	link := NewSinglyLink[int]()
@@ -149,6 +162,8 @@ func TestSinglyLink_Reverse(t *testing.T) {
 }

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

 	link := NewSinglyLink[int]()
@@ -163,6 +178,7 @@ func TestSinglyLink_GetMiddleNode(t *testing.T) {
 	link.InsertAtTail(5)
 	link.InsertAtTail(6)
 	link.InsertAtTail(7)
+
 	middle2 := link.GetMiddleNode()
 	assert.Equal(4, middle2.Value)
 }
--- a/datastructure/list/list_test.go
+++ b/datastructure/list/list_test.go
@@ -7,6 +7,8 @@ import (
 )

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

 	list := NewList([]int{1, 2, 3})
@@ -14,6 +16,8 @@ func TestListData(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 3})
@@ -26,6 +30,8 @@ func TestValueOf(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 3})
@@ -37,6 +43,8 @@ func TestIndexOf(t *testing.T) {
 }

 func TestIndexOfFunc(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestIndexOf")

 	list := NewList([]int{1, 2, 3})
@@ -48,6 +56,8 @@ func TestIndexOfFunc(t *testing.T) {
 }

 func TestLastIndexOf(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestIndexOf")

 	list := NewList([]int{1, 2, 3, 3, 3, 3, 4, 5, 6, 9})
@@ -65,6 +75,8 @@ func TestLastIndexOf(t *testing.T) {
 }

 func TestLastIndexOfFunc(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestIndexOf")

 	list := NewList([]int{1, 2, 3, 3, 3, 3, 4, 5, 6, 9})
@@ -82,6 +94,8 @@ func TestLastIndexOfFunc(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 3})
@@ -90,6 +104,8 @@ func TestContain(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 3})
@@ -99,6 +115,8 @@ func TestPush(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 3})
@@ -108,6 +126,8 @@ func TestInsertAtFirst(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 3})
@@ -117,6 +137,8 @@ func TestInsertAtLast(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 3})
@@ -135,6 +157,8 @@ func TestInsertAt(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 3})
@@ -150,6 +174,8 @@ func TestPopFirst(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 3})
@@ -165,6 +191,8 @@ func TestPopLast(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 3, 4})
@@ -183,6 +211,8 @@ func TestDeleteAt(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 3, 4})
@@ -201,6 +231,8 @@ func TestUpdateAt(t *testing.T) {
 }

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

 	list1 := NewList([]int{1, 2, 3, 4})
@@ -212,6 +244,8 @@ func TestEqual(t *testing.T) {
 }

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

 	list1 := NewList([]int{1, 2, 3, 4})
@@ -222,6 +256,8 @@ func TestIsEmpty(t *testing.T) {
 }

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

 	list1 := NewList([]int{1, 2, 3, 4})
@@ -232,6 +268,8 @@ func TestIsClear(t *testing.T) {
 }

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

 	list1 := NewList([]int{1, 2, 3, 4})
@@ -241,6 +279,8 @@ func TestClone(t *testing.T) {
 }

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

 	list1 := NewList([]int{1, 2, 3, 4})
@@ -252,6 +292,8 @@ func TestMerge(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 3, 4})
@@ -262,6 +304,8 @@ func TestSize(t *testing.T) {
 }

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

 	data := make([]int, 0, 100)
@@ -274,6 +318,8 @@ func TestCap(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 3, 4})
@@ -285,6 +331,8 @@ func TestSwap(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 3, 4})
@@ -296,6 +344,8 @@ func TestReverse(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 2, 3, 4})
@@ -307,6 +357,8 @@ func TestUnique(t *testing.T) {
 }

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

 	list1 := NewList([]int{1, 2, 3, 4})
@@ -318,6 +370,8 @@ func TestUnion(t *testing.T) {
 }

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

 	list1 := NewList([]int{1, 2, 3, 4})
@@ -329,6 +383,8 @@ func TestIntersection(t *testing.T) {
 }

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

 	list1 := NewList([]int{1, 2, 3})
@@ -340,6 +396,8 @@ func TestDifference(t *testing.T) {
 }

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

 	list1 := NewList([]int{1, 2, 3})
@@ -351,6 +409,8 @@ func TestSymmetricDifference(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 3, 4, 5, 8})
@@ -367,6 +427,8 @@ func BenchmarkSubSlice(b *testing.B) {
 }

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

 	list := NewList([]int{1, 1, 1, 1, 2, 3, 1, 1, 4, 1, 1, 1, 1, 1, 1})
@@ -381,10 +443,11 @@ func TestDeleteIf(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 3, 4})
-
 	rs := make([]int, 0)
 	list.ForEach(func(i int) {
 		rs = append(rs, i)
@@ -394,6 +457,8 @@ func TestForEach(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 3, 4})
@@ -414,6 +479,8 @@ func TestRetainAll(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 3, 4})
@@ -433,10 +500,11 @@ func TestDeleteAll(t *testing.T) {
 }

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

 	list := NewList([]int{1, 2, 3, 4})
-
 	iterator := list.Iterator()

 	rs := make([]int, 0)
@@ -449,14 +517,15 @@ func TestIterator(t *testing.T) {
 }

 func TestListToMap(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "ListToMap")

 	list := NewList([]int{1, 2, 3, 4})
-
 	result := ListToMap(list, func(n int) (int, bool) {
 		return n, n > 1
 	})
-	expected := map[int]bool{1: false, 2: true, 3: true, 4: true}

+	expected := map[int]bool{1: false, 2: true, 3: true, 4: true}
 	assert.Equal(expected, result)
 }
--- a/datastructure/queue/arrayqueue_test.go
+++ b/datastructure/queue/arrayqueue_test.go
@@ -7,6 +7,8 @@ import (
 )

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

 	queue := NewArrayQueue[int](5)
@@ -14,15 +16,16 @@ func TestArrayQueue_Enqueue(t *testing.T) {
 	queue.Enqueue(2)
 	queue.Enqueue(3)

-	expected := []int{1, 2, 3}
 	data := queue.Data()
 	size := queue.Size()

-	assert.Equal(expected, data)
+	assert.Equal([]int{1, 2, 3}, data)
 	assert.Equal(3, size)
 }

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

 	queue := NewArrayQueue[int](4)
@@ -38,6 +41,8 @@ func TestArrayQueue_Dequeue(t *testing.T) {
 }

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

 	queue := NewArrayQueue[int](4)
@@ -52,6 +57,8 @@ func TestArrayQueue_Front(t *testing.T) {
 }

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

 	queue := NewArrayQueue[int](4)
@@ -66,6 +73,8 @@ func TestArrayQueue_Back(t *testing.T) {
 }

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

 	queue := NewArrayQueue[int](4)
@@ -78,6 +87,8 @@ func TestArrayQueue_Contain(t *testing.T) {
 }

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

 	queue := NewArrayQueue[int](4)
@@ -95,6 +106,8 @@ func TestArrayQueue_Clear(t *testing.T) {
 }

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

 	queue := NewArrayQueue[int](3)
--- a/datastructure/queue/circularqueue_test.go
+++ b/datastructure/queue/circularqueue_test.go
@@ -7,6 +7,8 @@ import (
 )

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

 	queue := NewCircularQueue[int](6)
@@ -34,6 +36,8 @@ func TestCircularQueue_Enqueue(t *testing.T) {
 }

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

 	queue := NewCircularQueue[int](4)
@@ -60,6 +64,8 @@ func TestCircularQueue_Dequeue(t *testing.T) {
 }

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

 	queue := NewCircularQueue[int](6)
@@ -80,6 +86,8 @@ func TestCircularQueue_Front(t *testing.T) {
 }

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

 	queue := NewCircularQueue[int](3)
@@ -103,6 +111,8 @@ func TestCircularQueue_Back(t *testing.T) {
 }

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

 	queue := NewCircularQueue[int](2)
@@ -114,6 +124,8 @@ func TestCircularQueue_Contain(t *testing.T) {
 }

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

 	queue := NewCircularQueue[int](3)
@@ -132,6 +144,8 @@ func TestCircularQueue_Clear(t *testing.T) {
 }

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

 	queue := NewCircularQueue[int](3)
--- a/datastructure/queue/linkedqueue_test.go
+++ b/datastructure/queue/linkedqueue_test.go
@@ -7,6 +7,8 @@ import (
 )

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

 	queue := NewLinkedQueue[int]()
@@ -19,6 +21,8 @@ func TestLinkedQueue_Enqueue(t *testing.T) {
 }

 func TestLinkedQueue_Dequeue(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestLinkedQueue_DeQueue")

 	queue := NewLinkedQueue[int]()
@@ -35,6 +39,8 @@ func TestLinkedQueue_Dequeue(t *testing.T) {
 }

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

 	queue := NewLinkedQueue[int]()
@@ -51,6 +57,8 @@ func TestLinkedQueue_Front(t *testing.T) {
 }

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

 	queue := NewLinkedQueue[int]()
@@ -67,6 +75,8 @@ func TestLinkedQueue_Back(t *testing.T) {
 }

 func TestLinkedQueue_Clear(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestLinkedQueue_Back")

 	queue := NewLinkedQueue[int]()
@@ -82,10 +92,11 @@ func TestLinkedQueue_Clear(t *testing.T) {
 }

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

 	queue := NewLinkedQueue[int]()
-
 	queue.Enqueue(1)
 	queue.Enqueue(2)
 	queue.Enqueue(3)
--- a/datastructure/queue/priorityqueue_test.go
+++ b/datastructure/queue/priorityqueue_test.go
@@ -20,6 +20,8 @@ func (c *intComparator) Compare(v1, v2 any) int {
 	return 0
 }
 func TestPriorityQueue_Enqueue(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestPriorityQueue_Enqueue")

 	comparator := &intComparator{}
@@ -45,6 +47,8 @@ func TestPriorityQueue_Enqueue(t *testing.T) {
 }

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

 	comparator := &intComparator{}
--- a/datastructure/set/set_test.go
+++ b/datastructure/set/set_test.go
@@ -7,6 +7,8 @@ import (
 )

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

 	s1 := NewSetFromSlice([]int{1, 2, 2, 3})
@@ -20,17 +22,21 @@ func TestSet_NewSetFromSlice(t *testing.T) {
 }

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

 	set := NewSet[int]()
 	set.Add(1, 2, 3)

-	expected := NewSet(1, 2, 3)
+	cmpSet := NewSet(1, 2, 3)

-	assert.Equal(true, set.Equal(expected))
+	assert.Equal(true, set.Equal(cmpSet))
 }

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

 	set := NewSet[int]()
@@ -42,6 +48,8 @@ func TestSet_AddIfNotExist(t *testing.T) {
 }

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

 	set := NewSet[int]()
@@ -63,6 +71,8 @@ func TestSet_AddIfNotExistBy(t *testing.T) {
 }

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

 	set := NewSet[int]()
@@ -73,6 +83,8 @@ func TestSet_Contain(t *testing.T) {
 }

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

 	set1 := NewSet(1, 2, 3)
@@ -84,6 +96,8 @@ func TestSet_ContainAll(t *testing.T) {
 }

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

 	set1 := NewSet(1, 2, 3)
@@ -94,18 +108,20 @@ func TestSet_Clone(t *testing.T) {
 }

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

 	set := NewSet[int]()
 	set.Add(1, 2, 3)
 	set.Delete(3)

-	expected := NewSet(1, 2)
-
-	assert.Equal(true, set.Equal(expected))
+	assert.Equal(true, set.Equal(NewSet(1, 2)))
 }

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

 	set1 := NewSet(1, 2, 3)
@@ -117,6 +133,8 @@ func TestSet_Equal(t *testing.T) {
 }

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

 	set := NewSet(1, 2, 3)
@@ -129,6 +147,8 @@ func TestSet_Iterate(t *testing.T) {
 }

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

 	set := NewSet[int]()
@@ -136,6 +156,8 @@ func TestSet_IsEmpty(t *testing.T) {
 }

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

 	set := NewSet(1, 2, 3)
@@ -143,6 +165,8 @@ func TestSet_Size(t *testing.T) {
 }

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

 	set := NewSet(1, 2, 3)
@@ -152,28 +176,33 @@ func TestSet_Values(t *testing.T) {
 }

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

 	set1 := NewSet(1, 2, 3)
 	set2 := NewSet(2, 3, 4, 5)
-	expected := NewSet(1, 2, 3, 4, 5)
+
 	unionSet := set1.Union(set2)

-	assert.Equal(expected, unionSet)
+	assert.Equal(NewSet(1, 2, 3, 4, 5), unionSet)
 }

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

 	set1 := NewSet(1, 2, 3)
 	set2 := NewSet(2, 3, 4, 5)
-	expected := NewSet(2, 3)
 	intersectionSet := set1.Intersection(set2)

-	assert.Equal(expected, intersectionSet)
+	assert.Equal(NewSet(2, 3), intersectionSet)
 }

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

 	set1 := NewSet(1, 2, 3)
@@ -183,6 +212,8 @@ func TestSet_SymmetricDifference(t *testing.T) {
 }

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

 	set1 := NewSet(1, 2, 3)
--- a/datastructure/stack/arraystack_test.go
+++ b/datastructure/stack/arraystack_test.go
@@ -7,6 +7,8 @@ import (
 )

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

 	stack := NewArrayStack[int]()
@@ -14,15 +16,16 @@ func TestArrayStack_Push(t *testing.T) {
 	stack.Push(2)
 	stack.Push(3)

-	expected := []int{3, 2, 1}
 	values := stack.Data()
 	length := stack.Size()

-	assert.Equal(expected, values)
+	assert.Equal([]int{3, 2, 1}, values)
 	assert.Equal(3, length)
 }

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

 	stack := NewArrayStack[int]()
@@ -37,11 +40,12 @@ func TestArrayStack_Pop(t *testing.T) {
 	assert.IsNil(err)
 	assert.Equal(3, *topItem)

-	expected := []int{2, 1}
-	assert.Equal(expected, stack.Data())
+	assert.Equal([]int{2, 1}, stack.Data())
 }

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

 	stack := NewArrayStack[int]()
@@ -56,11 +60,12 @@ func TestArrayStack_Peak(t *testing.T) {
 	assert.IsNil(err)
 	assert.Equal(3, *topItem)

-	expected := []int{3, 2, 1}
-	assert.Equal(expected, stack.Data())
+	assert.Equal([]int{3, 2, 1}, stack.Data())
 }

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

 	stack := NewArrayStack[int]()
--- a/datastructure/stack/linkedstack_test.go
+++ b/datastructure/stack/linkedstack_test.go
@@ -7,6 +7,8 @@ import (
 )

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

 	stack := NewLinkedStack[int]()
@@ -14,15 +16,16 @@ func TestLinkedStack_Push(t *testing.T) {
 	stack.Push(2)
 	stack.Push(3)

-	expected := []int{3, 2, 1}
 	values := stack.Data()
 	size := stack.Size()

-	assert.Equal(expected, values)
+	assert.Equal([]int{3, 2, 1}, values)
 	assert.Equal(3, size)
 }

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

 	stack := NewLinkedStack[int]()
@@ -37,12 +40,13 @@ func TestLinkedStack_Pop(t *testing.T) {
 	assert.IsNil(err)
 	assert.Equal(3, *topItem)

-	expected := []int{2, 1}
 	stack.Print()
-	assert.Equal(expected, stack.Data())
+	assert.Equal([]int{2, 1}, stack.Data())
 }

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

 	stack := NewLinkedStack[int]()
@@ -57,11 +61,12 @@ func TestLinkedStack_Peak(t *testing.T) {
 	assert.IsNil(err)
 	assert.Equal(3, *topItem)

-	expected := []int{3, 2, 1}
-	assert.Equal(expected, stack.Data())
+	assert.Equal([]int{3, 2, 1}, stack.Data())
 }

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

 	stack := NewLinkedStack[int]()
--- a/datastructure/tree/bstree_test.go
+++ b/datastructure/tree/bstree_test.go
@@ -20,16 +20,9 @@ func (c *intComparator) Compare(v1, v2 any) int {
 	return 0
 }

-func TestBSTree_Insert(t *testing.T) {
-	bstree := NewBSTree(6, &intComparator{})
-
-	bstree.Insert(7)
-	bstree.Insert(5)
-	bstree.Insert(2)
-	bstree.Insert(4)
-}
-
 func TestBSTree_PreOrderTraverse(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestBSTree_PreOrderTraverse")

 	bstree := NewBSTree(6, &intComparator{})
@@ -44,6 +37,8 @@ func TestBSTree_PreOrderTraverse(t *testing.T) {
 }

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

 	bstree := NewBSTree(6, &intComparator{})
@@ -58,6 +53,8 @@ func TestBSTree_PostOrderTraverse(t *testing.T) {
 }

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

 	bstree := NewBSTree(6, &intComparator{})
@@ -72,6 +69,8 @@ func TestBSTree_InOrderTraverse(t *testing.T) {
 }

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

 	bstree := NewBSTree(6, &intComparator{})
@@ -86,6 +85,8 @@ func TestBSTree_LevelOrderTraverse(t *testing.T) {
 }

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

 	bstree := NewBSTree(6, &intComparator{})
@@ -108,6 +109,8 @@ func TestBSTree_Delete(t *testing.T) {
 }

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

 	bstree := NewBSTree(6, &intComparator{})
@@ -121,6 +124,8 @@ func TestBSTree_Depth(t *testing.T) {
 }

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

 	superTree := NewBSTree(8, &intComparator{})
--- a/datetime/conversion_test.go
+++ b/datetime/conversion_test.go
@@ -7,6 +7,8 @@ import (
 )

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

 	tm1 := NewUnixNow()
@@ -17,6 +19,8 @@ func TestToUnix(t *testing.T) {
 }

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

 	tm, err := NewFormat("2022-03-18 17:04:05")
@@ -25,18 +29,21 @@ func TestToFormat(t *testing.T) {
 }

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

 	_, err := NewFormat("2022/03/18 17:04:05")
 	assert.IsNotNil(err)

 	tm, err := NewFormat("2022-03-18 17:04:05")
-	// assert.Equal("2022/03/18 17:04:05", tm.ToFormatForTpl("2006/01/02 15:04:05"))
 	t.Log("TestToFormatForTpl", tm.ToFormatForTpl("2006/01/02 15:04:05"))
 	assert.IsNil(err)
 }

 func TestToIso8601(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestToIso8601")

 	_, err := NewISO8601("2022-03-18 17:04:05")
@@ -44,6 +51,5 @@ func TestToIso8601(t *testing.T) {

 	tm, err := NewISO8601("2006-01-02T15:04:05.999Z")
 	t.Log("TestToIso8601", tm.ToIso8601())
-	// assert.Equal("2006-01-02T23:04:05+08:00", tm.ToIso8601())
 	assert.IsNil(err)
 }
--- a/datetime/datetime.go
+++ b/datetime/datetime.go
@@ -96,6 +96,18 @@ func GetNowDateTime() string {
 	return time.Now().Format("2006-01-02 15:04:05")
 }

+// GetTodayStartTime return the start time of today, format: yyyy-mm-dd 00:00:00.
+// Play: todo
+func GetTodayStartTime() string {
+	return time.Now().Format("2006-01-02") + " 00:00:00"
+}
+
+// GetTodayEndTime return the end time of today, format: yyyy-mm-dd 23:59:59.
+// Play: todo
+func GetTodayEndTime() string {
+	return time.Now().Format("2006-01-02") + " 23:59:59"
+}
+
 // GetZeroHourTimestamp return timestamp of zero hour (timestamp of 00:00).
 // Play: https://go.dev/play/p/QmL2oIaGE3q
 func GetZeroHourTimestamp() int64 {
--- a/datetime/datetime_test.go
+++ b/datetime/datetime_test.go
@@ -8,6 +8,8 @@ import (
 )

 func TestAddYear(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestAddDay")

 	now := time.Now()
@@ -21,6 +23,8 @@ func TestAddYear(t *testing.T) {
 }

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

 	today := time.Now()
@@ -35,6 +39,8 @@ func TestBetweenSeconds(t *testing.T) {
 }

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

 	now := time.Now()
@@ -48,6 +54,8 @@ func TestAddDay(t *testing.T) {
 }

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

 	now := time.Now()
@@ -61,6 +69,8 @@ func TestAddHour(t *testing.T) {
 }

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

 	now := time.Now()
@@ -74,24 +84,48 @@ func TestAddMinute(t *testing.T) {
 }

 func TestGetNowDate(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestGetNowDate")
 	expected := time.Now().Format("2006-01-02")
 	assert.Equal(expected, GetNowDate())
 }

 func TestGetNowTime(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestGetNowTime")
 	expected := time.Now().Format("15:04:05")
 	assert.Equal(expected, GetNowTime())
 }

 func TestGetNowDateTime(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestGetNowDateTime")
 	expected := time.Now().Format("2006-01-02 15:04:05")
 	assert.Equal(expected, GetNowDateTime())
 }

+func TestGetTodayStartTime(t *testing.T) {
+	t.Parallel()
+
+	assert := internal.NewAssert(t, "TestGetTodayStartTime")
+	expected := time.Now().Format("2006-01-02") + " 00:00:00"
+	assert.Equal(expected, GetTodayStartTime())
+}
+
+func TestGetTodayEndTime(t *testing.T) {
+	t.Parallel()
+
+	assert := internal.NewAssert(t, "TestGetTodayEndTime")
+	expected := time.Now().Format("2006-01-02") + " 23:59:59"
+	assert.Equal(expected, GetTodayEndTime())
+}
+
 func TestFormatTimeToStr(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestFormatTimeToStr")

 	datetime, _ := time.Parse("2006-01-02 15:04:05", "2021-01-02 16:04:08")
@@ -116,6 +150,8 @@ func TestFormatTimeToStr(t *testing.T) {
 }

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

 	formats := []string{
@@ -143,6 +179,8 @@ func TestFormatStrToTime(t *testing.T) {
 }

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

 	expected := time.Date(2022, 2, 15, 15, 48, 0, 0, time.Local)
@@ -153,6 +191,8 @@ func TestBeginOfMinute(t *testing.T) {
 }

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

 	expected := time.Date(2022, 2, 15, 15, 48, 59, 999999999, time.Local)
@@ -163,6 +203,8 @@ func TestEndOfMinute(t *testing.T) {
 }

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

 	expected := time.Date(2022, 2, 15, 15, 0, 0, 0, time.Local)
@@ -173,6 +215,8 @@ func TestBeginOfHour(t *testing.T) {
 }

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

 	expected := time.Date(2022, 2, 15, 15, 59, 59, 999999999, time.Local)
@@ -183,6 +227,8 @@ func TestEndOfHour(t *testing.T) {
 }

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

 	expected := time.Date(2022, 2, 15, 0, 0, 0, 0, time.Local)
@@ -193,6 +239,8 @@ func TestBeginOfDay(t *testing.T) {
 }

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

 	expected := time.Date(2022, 2, 15, 23, 59, 59, 999999999, time.Local)
@@ -203,6 +251,8 @@ func TestEndOfDay(t *testing.T) {
 }

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

 	expected := time.Date(2022, 2, 13, 0, 0, 0, 0, time.Local)
@@ -213,6 +263,8 @@ func TestBeginOfWeek(t *testing.T) {
 }

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

 	expected := time.Date(2022, 2, 19, 23, 59, 59, 999999999, time.Local)
@@ -223,6 +275,8 @@ func TestEndOfWeek(t *testing.T) {
 }

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

 	expected := time.Date(2022, 2, 1, 0, 0, 0, 0, time.Local)
@@ -233,6 +287,8 @@ func TestBeginOfMonth(t *testing.T) {
 }

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

 	expected := time.Date(2022, 2, 28, 23, 59, 59, 999999999, time.Local)
@@ -243,6 +299,8 @@ func TestEndOfMonth(t *testing.T) {
 }

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

 	expected := time.Date(2022, 1, 1, 0, 0, 0, 0, time.Local)
@@ -253,6 +311,8 @@ func TestBeginOfYear(t *testing.T) {
 }

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

 	expected := time.Date(2022, 12, 31, 23, 59, 59, 999999999, time.Local)
@@ -263,6 +323,8 @@ func TestEndOfYear(t *testing.T) {
 }

 func TestIsLeapYear(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestEndOfYear")

 	result1 := IsLeapYear(2000)
@@ -273,6 +335,8 @@ func TestIsLeapYear(t *testing.T) {
 }

 func TestDayOfYear(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestDayOfYear")
 	date1 := time.Date(2023, 02, 01, 1, 1, 1, 0, time.Local)
 	result1 := DayOfYear(date1)
@@ -288,7 +352,10 @@ func TestDayOfYear(t *testing.T) {
 }

 func TestIsWeekend(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestIsWeekend")
+
 	date := time.Date(2023, 06, 03, 0, 0, 0, 0, time.Local)
 	result := IsWeekend(date)
 	assert.Equal(true, result)
@@ -300,5 +367,4 @@ func TestIsWeekend(t *testing.T) {
 	date2 := time.Date(2023, 06, 02, 0, 0, 0, 0, time.Local)
 	result2 := IsWeekend(date2)
 	assert.Equal(false, result2)
-
 }
--- a/docs/cryptor.md
+++ b/docs/cryptor.md
@@ -48,6 +48,7 @@ import (
 - [HmacSha256](#HmacSha256)
 - [HmacSha512](#HmacSha512)
 - [Md5String](#Md5String)
+- [Md5Byte](#Md5Byte)
 - [Md5File](#Md5File)
 - [Sha1](#Sha1)
 - [Sha256](#Sha256)
@@ -880,6 +881,35 @@ func main() {
 }
 ```

+### <span id="Md5Byte">Md5Byte</span>
+
+<p>Return the md5 string of byte slice.</p>
+
+<b>Signature:</b>
+
+```go
+func Md5Byte(data []byte) string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/cryptor"
+)
+
+func main() {
+    md5Str := cryptor.Md5Byte([]byte{'a'})
+	fmt.Println(md5Str)
+
+	// Output:
+	// 0cc175b9c0f1b6a831c399e269772661
+}
+```
+
 ### <span id="Md5File">Md5File</span>

 <p>Get the md5 value of file.</p>
--- a/docs/cryptor_zh-CN.md
+++ b/docs/cryptor_zh-CN.md
@@ -45,6 +45,7 @@ import (
 - [HmacSha256](#HmacSha256)
 - [HmacSha512](#HmacSha512)
 - [Md5String](#Md5String)
+- [Md5Byte](#Md5Byte)
 - [Md5File](#Md5File)
 - [Sha1](#Sha1)
 - [Sha256](#Sha256)
@@ -879,6 +880,35 @@ func main() {
 }
 ```

+### <span id="Md5Byte">Md5Byte</span>
+
+<p>获取byte slice的md5至。</p>
+
+<b>函数签名:</b>
+
+```go
+func Md5Byte(data []byte) string
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/cryptor"
+)
+
+func main() {
+    md5Str := cryptor.Md5Byte([]byte{'a'})
+	fmt.Println(md5Str)
+
+	// Output:
+	// 0cc175b9c0f1b6a831c399e269772661
+}
+```
+
 ### <span id="Md5File">Md5File</span>

 <p>获取文件md5值。</p>
--- a/docs/datetime.md
+++ b/docs/datetime.md
@@ -42,6 +42,8 @@ import (
 -   [GetNowDate](#GetNowDate)
 -   [GetNowTime](#GetNowTime)
 -   [GetNowDateTime](#GetNowDateTime)
+-   [GetTodayStartTime](#GetTodayStartTime)
+-   [GetTodayEndTime](#GetTodayEndTime)
 -   [GetZeroHourTimestamp](#GetZeroHourTimestamp)
 -   [GetNightTimestamp](#GetNightTimestamp)
 -   [FormatTimeToStr](#FormatTimeToStr)
@@ -643,14 +645,11 @@ package main

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

 func main() {
-    now := time.Now()
    currentDate := datetime.GetNowDate()
-
    fmt.Println(currentDate)

    // Output:
@@ -675,14 +674,11 @@ package main

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

 func main() {
-    now := time.Now()
    currentTime := datetime.GetNowTime()
-
    fmt.Println(currentTime) // 15:57:33

    // Output:
@@ -707,14 +703,11 @@ package main

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

 func main() {
-    now := time.Now()
    current := datetime.GetNowDateTime()
-
    fmt.Println(current)

    // Output:
@@ -722,6 +715,64 @@ func main() {
 }
 ```

+### <span id="GetTodayStartTime">GetTodayStartTime</span>
+
+<p>Return the start time of today, format: yyyy-mm-dd 00:00:00.</p>
+
+<b>Signature:</b>
+
+```go
+func GetTodayStartTime() string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    startTime := datetime.GetTodayStartTime()
+    fmt.Println(startTime)
+
+    // Output:
+    // 2023-06-29 00:00:00
+}
+```
+
+### <span id="GetTodayEndTime">GetTodayEndTime</span>
+
+<p>Return the end time of today, format: yyyy-mm-dd 23:59:59.</p>
+
+<b>Signature:</b>
+
+```go
+func GetTodayEndTime() string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    endTime := datetime.GetTodayEndTime()
+    fmt.Println(endTime)
+
+    // Output:
+    // 2023-06-29 23:59:59
+}
+```
+
 ### <span id="GetZeroHourTimestamp">GetZeroHourTimestamp</span>

 <p>Return timestamp of zero hour (timestamp of 00:00).</p>
@@ -739,14 +790,11 @@ package main

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

 func main() {
-    now := time.Now()
    zeroTime := datetime.GetZeroHourTimestamp()
-
    fmt.Println(zeroTime)

    // Output:
@@ -771,14 +819,11 @@ package main

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

 func main() {
-    now := time.Now()
    nightTime := datetime.GetNightTimestamp()
-
    fmt.Println(nightTime)

    // Output:
--- a/docs/datetime_zh-CN.md
+++ b/docs/datetime_zh-CN.md
@@ -41,6 +41,8 @@ import (
 -   [GetNowDate](#GetNowDate)
 -   [GetNowTime](#GetNowTime)
 -   [GetNowDateTime](#GetNowDateTime)
+-   [GetTodayStartTime](#GetTodayStartTime)
+-   [GetTodayEndTime](#GetTodayEndTime)
 -   [GetZeroHourTimestamp](#GetZeroHourTimestamp)
 -   [GetNightTimestamp](#GetNightTimestamp)
 -   [FormatTimeToStr](#FormatTimeToStr)
@@ -643,14 +645,11 @@ package main

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

 func main() {
-    now := time.Now()
    currentDate := datetime.GetNowDate()
-
    fmt.Println(currentDate)

    // Output:
@@ -675,15 +674,12 @@ package main

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

 func main() {
-    now := time.Now()
    currentTime := datetime.GetNowTime()
-
-    fmt.Println(currentTime) // 15:57:33
+    fmt.Println(currentTime)

    // Output:
    // 15:57:33
@@ -707,14 +703,11 @@ package main

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

 func main() {
-    now := time.Now()
    current := datetime.GetNowDateTime()
-
    fmt.Println(current)

    // Output:
@@ -722,6 +715,64 @@ func main() {
 }
 ```

+### <span id="GetTodayStartTime">GetTodayStartTime</span>
+
+<p>返回当天开始时间， 格式: yyyy-mm-dd 00:00:00.</p>
+
+<b>函数签名:</b>
+
+```go
+func GetTodayStartTime() string
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    startTime := datetime.GetTodayStartTime()
+    fmt.Println(startTime)
+
+    // Output:
+    // 2023-06-29 00:00:00
+}
+```
+
+### <span id="GetTodayEndTime">GetTodayEndTime</span>
+
+<p>返回当天结束时间，格式: yyyy-mm-dd 23:59:59.</p>
+
+<b>函数签名:</b>
+
+```go
+func GetTodayEndTime() string
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/datetime"
+)
+
+func main() {
+    endTime := datetime.GetTodayEndTime()
+    fmt.Println(endTime)
+
+    // Output:
+    // 2023-06-29 23:59:59
+}
+```
+
 ### <span id="GetZeroHourTimestamp">GetZeroHourTimestamp</span>

 <p>获取零点时间戳(timestamp of 00:00)</p>
@@ -739,14 +790,11 @@ package main

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

 func main() {
-    now := time.Now()
    zeroTime := datetime.GetZeroHourTimestamp()
-
    fmt.Println(zeroTime)

    // Output:
@@ -771,14 +819,11 @@ package main

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

 func main() {
-    now := time.Now()
    nightTime := datetime.GetNightTimestamp()
-
    fmt.Println(nightTime)

    // Output:
--- a/docs/fileutil.md
+++ b/docs/fileutil.md
@@ -484,7 +484,7 @@ func main() {
 <b>Signature:</b>

 ```go
-func ZipAppendEntry(fpath string, destPath string) error 
+func ZipAppendEntry(fpath string, destPath string) error
 ```

 <b>Example:</b>
@@ -714,18 +714,30 @@ import (
 )

 func main() {
+    fpath := "./test.csv"
+    fileutil.CreateFile(fpath)
+
+    f, _ := os.OpenFile(fpath, os.O_WRONLY|os.O_TRUNC, 0777)
+    defer f.Close()
+
    data := [][]string{
        {"Lili", "22", "female"},
        {"Jim", "21", "male"},
    }
-    err := WriteCsvFile("./testdata/test2.csv", data, false)
-    fmt.Println(err)
+    err := fileutil.WriteCsvFile(fpath, data, false)

-    content, _ := ReadCsvFile("./testdata/test2.csv")
+    if err != nil {
+        return
+    }
+
+    content, err := fileutil.ReadCsvFile(fpath)
+
+    if err != nil {
+        return
+    }
    fmt.Println(content)

    // Output:
-    // <nil>
    // [[Lili 22 female] [Jim 21 male]]
 }
 ```
--- a/docs/fileutil_zh-CN.md
+++ b/docs/fileutil_zh-CN.md
@@ -714,18 +714,30 @@ import (
 )

 func main() {
+    fpath := "./test.csv"
+    fileutil.CreateFile(fpath)
+
+    f, _ := os.OpenFile(fpath, os.O_WRONLY|os.O_TRUNC, 0777)
+    defer f.Close()
+
    data := [][]string{
        {"Lili", "22", "female"},
        {"Jim", "21", "male"},
    }
-    err := WriteCsvFile("./testdata/test2.csv", data, false)
-    fmt.Println(err)
+    err := fileutil.WriteCsvFile(fpath, data, false)

-    content, _ := ReadCsvFile("./testdata/test2.csv")
+    if err != nil {
+        return
+    }
+
+    content, err := fileutil.ReadCsvFile(fpath)
+
+    if err != nil {
+        return
+    }
    fmt.Println(content)

    // Output:
-    // <nil>
    // [[Lili 22 female] [Jim 21 male]]
 }
 ```
--- a/docs/mathutil.md
+++ b/docs/mathutil.md
@@ -46,6 +46,8 @@ import (
 -   [Sin](#Sin)
 -   [Log](#Log)
 -   [Sum](#Sum)
+-   [Abs](#Abs)
+

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

@@ -942,4 +944,40 @@ func main() {
    // 3
    // 1.1
 }
+```
+
+### <span id="Abs">Abs</span>
+
+<p>Returns the absolute value of x.</p>
+
+<b>Signature:</b>
+
+```go
+func Abs[T constraints.Integer | constraints.Float](x T) T
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/mathutil"
+)
+
+func main() {
+    result1 := Abs(-1)
+	result2 := Abs(-0.1)
+	result3 := Abs(float32(0.2))
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
+
+	// Output:
+	// 1
+	// 0.1
+	// 0.2
+}
 ```
--- a/docs/mathutil_zh-CN.md
+++ b/docs/mathutil_zh-CN.md
@@ -46,6 +46,7 @@ import (
 -   [Sin](#Sin)
 -   [Log](#Log)
 -   [Sum](#Sum)
+-   [Abs](#Abs)

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

@@ -941,3 +942,39 @@ func main() {
    // 1.1
 }
 ```
+
+### <span id="Abs">Abs</span>
+
+<p>求绝对值。</p>
+
+<b>函数签名:</b>
+
+```go
+func Abs[T constraints.Integer | constraints.Float](x T) T
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/mathutil"
+)
+
+func main() {
+    result1 := Abs(-1)
+	result2 := Abs(-0.1)
+	result3 := Abs(float32(0.2))
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
+
+	// Output:
+	// 1
+	// 0.1
+	// 0.2
+}
+```
--- a/docs/pointer.md
+++ b/docs/pointer.md
@@ -0,0 +1,136 @@
+# Pointer
+
+pointer contains some util functions to operate go pointer.
+
+<div STYLE="page-break-after: always;"></div>
+
+## Source:
+
+-   [https://github.com/duke-git/lancet/blob/main/pointer/pointer.go](https://github.com/duke-git/lancet/blob/main/pointer/pointer.go)
+
+<div STYLE="page-break-after: always;"></div>
+
+## Usage:
+
+```go
+import (
+    "github.com/duke-git/lancet/v2/pointer"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## Index
+
+-   [Of](#Of)
+-   [Unwrap](#Unwrap)
+-   [ExtractPointer](#ExtractPointer)
+
+<div STYLE="page-break-after: always;"></div>
+
+## Documentation
+
+### <span id="Of">Of</span>
+
+<p>Returns a pointer to the pass value `v`.</p>
+
+<b>Signature:</b>
+
+```go
+func Of[T any](v T) *T
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/pointer"
+)
+
+func main() {
+    result1 := pointer.Of(123)
+    result2 := pointer.Of("abc")
+
+    fmt.Println(*result1)
+    fmt.Println(*result2)
+
+    // Output:
+    // 123
+    // abc
+}
+```
+
+
+### <span id="Unwrap">Unwrap</span>
+
+<p>Returns the value from the pointer.</p>
+
+<b>Signature:</b>
+
+```go
+func Unwrap[T any](p *T) T
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/pointer"
+)
+
+func main() {
+    a := 123
+    b := "abc"
+
+    result1 := pointer.Unwrap(&a)
+    result2 := pointer.Unwrap(&b)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+
+    // Output:
+    // 123
+    // abc
+}
+```
+
+### <span id="ExtractPointer">ExtractPointer</span>
+
+<p>Returns the underlying value by the given interface type</p>
+
+<b>Signature:</b>
+
+```go
+func ExtractPointer(value any) any
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/pointer"
+)
+
+func main() {
+    a := 1
+    b := &a
+    c := &b
+    d := &c
+
+    result := pointer.ExtractPointer(d)
+
+    fmt.Println(result)
+
+    // Output:
+    // 1
+}
+```
--- a/docs/pointer_zh-CN.md
+++ b/docs/pointer_zh-CN.md
@@ -0,0 +1,136 @@
+# Pointer
+
+pointer包支持一些指针类型的操作。
+
+<div STYLE="page-break-after: always;"></div>
+
+## 源码:
+
+-   [https://github.com/duke-git/lancet/blob/main/pointer/pointer.go](https://github.com/duke-git/lancet/blob/main/pointer/pointer.go)
+
+<div STYLE="page-break-after: always;"></div>
+
+## 用法:
+
+```go
+import (
+    "github.com/duke-git/lancet/v2/pointer"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## 目录
+
+-   [Of](#Of)
+-   [Unwrap](#Unwrap)
+-   [ExtractPointer](#ExtractPointer)
+
+<div STYLE="page-break-after: always;"></div>
+
+## 文档
+
+### <span id="Of">Of</span>
+
+<p>返回传入参数的指针值。</p>
+
+<b>函数签名:</b>
+
+```go
+func Of[T any](v T) *T
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/pointer"
+)
+
+func main() {
+    result1 := pointer.Of(123)
+    result2 := pointer.Of("abc")
+
+    fmt.Println(*result1)
+    fmt.Println(*result2)
+
+    // Output:
+    // 123
+    // abc
+}
+```
+
+
+### <span id="Unwrap">Unwrap</span>
+
+<p>返回传入指针指向的值。</p>
+
+<b>函数签名:</b>
+
+```go
+func Unwrap[T any](p *T) T
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/pointer"
+)
+
+func main() {
+    a := 123
+    b := "abc"
+
+    result1 := pointer.Unwrap(&a)
+    result2 := pointer.Unwrap(&b)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+
+    // Output:
+    // 123
+    // abc
+}
+```
+
+### <span id="ExtractPointer">ExtractPointer</span>
+
+<p>返回传入interface的底层值。</p>
+
+<b>函数签名:</b>
+
+```go
+func ExtractPointer(value any) any
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/pointer"
+)
+
+func main() {
+    a := 1
+    b := &a
+    c := &b
+    d := &c
+
+    result := pointer.ExtractPointer(d)
+
+    fmt.Println(result)
+
+    // Output:
+    // 1
+}
+```
--- a/docs/random.md
+++ b/docs/random.md
@@ -269,7 +269,7 @@ import (
 )

 func main() {
-    result := RandUniqueIntSlice(5, 0, 10)
+    result := random.RandUniqueIntSlice(5, 0, 10)
    fmt.Println(result) //[0 4 7 1 5] (random)
 }
 ```
--- a/docs/random_zh-CN.md
+++ b/docs/random_zh-CN.md
@@ -268,7 +268,7 @@ import (
 )

 func main() {
-    result := RandUniqueIntSlice(5, 0, 10)
+    result := random.RandUniqueIntSlice(5, 0, 10)
    fmt.Println(result) //[0 4 7 1 5] (random)
 }
 ```
--- a/docs/system_zh-CN.md
+++ b/docs/system_zh-CN.md
@@ -34,19 +34,19 @@ import (

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

-## Documentation 文档
+## 文档

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

 <p>检查当前操作系统是否是windows</p>

-<b>Signature:</b>
+<b>函数签名:</b>

 ```go
 func IsWindows() bool
 ```

-<b>Example:</b>
+<b>示例:</b>

 ```go
 import (
@@ -64,13 +64,13 @@ func main() {

 <p>检查当前操作系统是否是linux</p>

-<b>Signature:</b>
+<b>函数签名:</b>

 ```go
 func IsLinux() bool
 ```

-<b>Example:</b>
+<b>示例:</b>

 ```go
 import (
@@ -88,13 +88,13 @@ func main() {

 <p>检查当前操作系统是否是macos</p>

-<b>Signature:</b>
+<b>函数签名:</b>

 ```go
 func IsMac() bool
 ```

-<b>Example:</b>
+<b>示例:</b>

 ```go
 import (
@@ -112,13 +112,13 @@ func main() {

 <p>获取key命名的环境变量的值</p>

-<b>Signature:</b>
+<b>函数签名:</b>

 ```go
 func GetOsEnv(key string) string
 ```

-<b>Example:</b>
+<b>示例:</b>

 ```go
 import (
@@ -142,13 +142,13 @@ func main() {

 <p>设置由key命名的环境变量的值</p>

-<b>Signature:</b>
+<b>函数签名:</b>

 ```go
 func SetOsEnv(key, value string) error
 ```

-<b>Example:</b>
+<b>示例:</b>

 ```go
 import (
@@ -172,13 +172,13 @@ func main() {

 <p>删除单个环境变量</p>

-<b>Signature:</b>
+<b>函数签名:</b>

 ```go
 func RemoveOsEnv(key string) error
 ```

-<b>Example:</b>
+<b>示例:</b>

 ```go
 import (
@@ -210,13 +210,13 @@ func main() {

 <p>获取key命名的环境变量值并与compareEnv进行比较</p>

-<b>Signature:</b>
+<b>函数签名:</b>

 ```go
 func CompareOsEnv(key, comparedEnv string) bool
 ```

-<b>Example:</b>
+<b>示例:</b>

 ```go
 import (
@@ -243,7 +243,7 @@ func main() {

 <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>
+<b>函数签名:</b>

 ```go
 type (
@@ -252,7 +252,7 @@ type (
 func ExecCommand(command string, opts ...Option) (stdout, stderr string, err error)
 ```

-<b>Example:</b>
+<b>示例:</b>

 ```go
 import (
--- a/docs/tuple.md
+++ b/docs/tuple.md
--- a/docs/tuple_zh-CN.md
+++ b/docs/tuple_zh-CN.md
--- a/fileutil/file.go
+++ b/fileutil/file.go
@@ -507,7 +507,7 @@ func ReadCsvFile(filepath string) ([][]string, error) {
 }

 // WriteCsvFile write content to target csv file.
-// Play: todo
+// Play: https://go.dev/play/p/dAXm58Q5U1o
 func WriteCsvFile(filepath string, records [][]string, append bool) error {
 	flag := os.O_RDWR | os.O_CREATE

--- a/fileutil/file_test.go
+++ b/fileutil/file_test.go
@@ -8,6 +8,8 @@ import (
 )

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

 	cases := []string{"./", "./file.go", "./a.txt"}
@@ -20,6 +22,8 @@ func TestIsExist(t *testing.T) {
 }

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

 	f := "./text.txt"
@@ -36,6 +40,8 @@ func TestCreateFile(t *testing.T) {
 }

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

 	pwd, err := os.Getwd()
@@ -57,6 +63,8 @@ func TestCreateDir(t *testing.T) {
 }

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

 	cases := []string{"./", "./a.txt"}
@@ -69,6 +77,8 @@ func TestIsDir(t *testing.T) {
 }

 func TestRemoveFile(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestRemoveFile")
 	f := "./text.txt"
 	if !IsExist(f) {
--- a/formatter/byte_test.go
+++ b/formatter/byte_test.go
@@ -7,6 +7,8 @@ import (
 )

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

 	assert.Equal("1KB", DecimalBytes(1000))
@@ -21,6 +23,8 @@ func TestDecimalBytes(t *testing.T) {
 }

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

 	assert.Equal("1KiB", BinaryBytes(1024))
@@ -30,6 +34,8 @@ func TestBinaryBytes(t *testing.T) {
 }

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

 	cases := map[string]uint64{
@@ -58,6 +64,8 @@ func TestParseDecimalBytes(t *testing.T) {
 }

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

 	cases := map[string]uint64{
--- a/formatter/formatter_test.go
+++ b/formatter/formatter_test.go
@@ -8,6 +8,8 @@ import (
 )

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

 	assert.Equal("", Comma("", ""))
@@ -29,6 +31,8 @@ func TestComma(t *testing.T) {
 }

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

 	cases := []any{
@@ -60,6 +64,8 @@ func TestPretty(t *testing.T) {
 }

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

 	type User struct {
--- a/function/function_test.go
+++ b/function/function_test.go
@@ -11,6 +11,8 @@ import (
 )

 func TestAfter(t *testing.T) {
+	t.Parallel()
+
 	arr := []string{"a", "b"}
 	f := After(len(arr), func(i int) int {
 		fmt.Println("print done")
@@ -34,6 +36,8 @@ func TestAfter(t *testing.T) {
 }

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

 	arr := []string{"a", "b", "c", "d", "e"}
@@ -57,6 +61,8 @@ func TestBefore(t *testing.T) {
 }

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

 	add := func(a, b int) int {
@@ -71,6 +77,8 @@ func TestCurry(t *testing.T) {
 }

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

 	toUpper := func(strs ...string) string {
--- a/function/watcher_test.go
+++ b/function/watcher_test.go
@@ -7,6 +7,8 @@ import (
 )

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

 	w := NewWatcher()
--- a/iterator/iterator_test.go
+++ b/iterator/iterator_test.go
@@ -12,6 +12,8 @@ import (
 )

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

 	// HashNext
@@ -60,6 +62,8 @@ func TestSliceIterator(t *testing.T) {
 }

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

 	t.Run("range iterator: ", func(t *testing.T) {
@@ -85,6 +89,8 @@ func TestRangeIterator(t *testing.T) {
 }

 func TestChannelIterator(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestRangeIterator")

 	iter := FromSlice([]int{1, 2, 3, 4})
--- a/iterator/operation_test.go
+++ b/iterator/operation_test.go
@@ -17,6 +17,8 @@ import (
 )

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

 	iter := FromSlice([]int{1, 2, 3, 4})
@@ -28,6 +30,8 @@ func TestMapIterator(t *testing.T) {
 }

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

 	iter := FromSlice([]int{1, 2, 3, 4})
@@ -39,6 +43,8 @@ func TestFilterIterator(t *testing.T) {
 }

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

 	iter1 := FromSlice([]int{1, 2})
@@ -54,6 +60,8 @@ func TestJoinIterator(t *testing.T) {
 }

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

 	iter := FromSlice([]int{1, 2, 3, 4})
@@ -62,6 +70,8 @@ func TestReduce(t *testing.T) {
 }

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

 	iter := FromSlice([]int{1, 2, 3, 4, 5})
--- a/maputil/map_test.go
+++ b/maputil/map_test.go
@@ -9,6 +9,8 @@ import (
 )

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

 	m := map[int]string{
@@ -26,6 +28,8 @@ func TestKeys(t *testing.T) {
 }

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

 	m := map[int]string{
@@ -43,6 +47,8 @@ func TestValues(t *testing.T) {
 }

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

 	m := map[int]string{
@@ -61,6 +67,8 @@ func TestKeysBy(t *testing.T) {
 }

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

 	m := map[int]string{
@@ -88,6 +96,8 @@ func TestValuesBy(t *testing.T) {
 }

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

 	m1 := map[int]string{
@@ -110,6 +120,8 @@ func TestMerge(t *testing.T) {
 }

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

 	m := map[string]int{
@@ -129,6 +141,8 @@ func TestForEach(t *testing.T) {
 }

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

 	m := map[string]int{
@@ -151,6 +165,8 @@ func TestFilter(t *testing.T) {
 }

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

 	m := map[string]int{
@@ -170,6 +186,8 @@ func TestFilterByKeys(t *testing.T) {
 }

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

 	m := map[string]int{
@@ -189,6 +207,8 @@ func TestFilterByValues(t *testing.T) {
 }

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

 	m := map[string]int{
@@ -212,6 +232,8 @@ func TestOmitBy(t *testing.T) {
 }

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

 	m := map[string]int{
@@ -232,6 +254,8 @@ func TestOmitByKeys(t *testing.T) {
 }

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

 	m := map[string]int{
@@ -252,6 +276,8 @@ func TestOmitByValues(t *testing.T) {
 }

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

 	m1 := map[string]int{
@@ -279,6 +305,8 @@ func TestIntersect(t *testing.T) {
 }

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

 	m1 := map[string]int{
@@ -297,6 +325,8 @@ func TestMinus(t *testing.T) {
 }

 func TestIsDisjoint(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestMinus")

 	m1 := map[string]int{
@@ -319,6 +349,8 @@ func TestIsDisjoint(t *testing.T) {
 }

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

 	m := map[string]int{
@@ -339,6 +371,8 @@ func TestEntries(t *testing.T) {
 }

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

 	result := FromEntries([]Entry[string, int]{
@@ -354,6 +388,8 @@ func TestFromEntries(t *testing.T) {
 }

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

 	m := map[string]int{
@@ -376,6 +412,8 @@ func TestTransform(t *testing.T) {
 }

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

 	m := map[int]string{
@@ -398,6 +436,8 @@ func TestMapKeys(t *testing.T) {
 }

 func TestMapValues(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestMapKeys")

 	m := map[int]string{
--- a/maputil/typemap_test.go
+++ b/maputil/typemap_test.go
@@ -21,6 +21,8 @@ type (
 )

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

 	src := map[string]interface{}{
@@ -44,6 +46,8 @@ func TestStructType(t *testing.T) {
 }

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

 	tc := map[string]interface{}{
@@ -90,22 +94,31 @@ func TestBaseType(t *testing.T) {

 	MapTo(tc["i"], &number)
 	assert.EqualValues(-1, number)
+
 	MapTo(tc["i8"], &number)
 	assert.EqualValues(-8, number)
+
 	MapTo(tc["i16"], &number)
 	assert.EqualValues(-16, number)
+
 	MapTo(tc["i32"], &number)
 	assert.EqualValues(-32, number)
+
 	MapTo(tc["i64"], &number)
 	assert.EqualValues(-64, number)
+
 	MapTo(tc["u"], &number)
 	assert.EqualValues(1, number)
+
 	MapTo(tc["u8"], &number)
 	assert.EqualValues(8, number)
+
 	MapTo(tc["u16"], &number)
 	assert.EqualValues(16, number)
+
 	MapTo(tc["u32"], &number)
 	assert.EqualValues(32, number)
+
 	MapTo(tc["u64"], &number)
 	assert.EqualValues(64, number)
 }
--- a/mathutil/mathutil.go
+++ b/mathutil/mathutil.go
@@ -173,7 +173,7 @@ func MinBy[T any](slice []T, comparator func(T, T) bool) T {
 }

 // Sum return sum of passed numbers.
-// Play: todo
+// Play: https://go.dev/play/p/1To2ImAMJA7
 func Sum[T constraints.Integer | constraints.Float](numbers ...T) T {
 	var sum T

@@ -337,7 +337,17 @@ func Sin(radian float64, precision ...int) float64 {
 }

 // Log returns the logarithm of base n.
-// Play: todo
+// Play: https://go.dev/play/p/_d4bi8oyhat
 func Log(n, base float64) float64 {
 	return math.Log(n) / math.Log(base)
 }
+
+// Abs returns the absolute value of x.
+// Play: todo
+func Abs[T constraints.Integer | constraints.Float](x T) T {
+	if x < 0 {
+		return (-x)
+	}
+
+	return x
+}
--- a/mathutil/mathutil_exmaple_test.go
+++ b/mathutil/mathutil_exmaple_test.go
@@ -389,3 +389,18 @@ func ExampleLog() {
 	// 2.32
 	// 3
 }
+
+func ExampleAbs() {
+	result1 := Abs(-1)
+	result2 := Abs(-0.1)
+	result3 := Abs(float32(0.2))
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
+
+	// Output:
+	// 1
+	// 0.1
+	// 0.2
+}
--- a/mathutil/mathutil_test.go
+++ b/mathutil/mathutil_test.go
@@ -8,6 +8,8 @@ import (
 )

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

 	assert.Equal(int64(1), Exponent(10, 0))
@@ -16,6 +18,8 @@ func TestExponent(t *testing.T) {
 }

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

 	assert.Equal(0, Fibonacci(1, 1, 0))
@@ -25,6 +29,8 @@ func TestFibonacci(t *testing.T) {
 }

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

 	assert.Equal(uint(1), Factorial(0))
@@ -34,6 +40,8 @@ func TestFactorial(t *testing.T) {
 }

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

 	assert.EqualValues(50, Percent(1, 2, 2))
@@ -42,6 +50,8 @@ func TestPercent(t *testing.T) {
 }

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

 	assert.Equal(float64(0), RoundToFloat(0, 0))
@@ -53,6 +63,8 @@ func TestRoundToFloat(t *testing.T) {
 }

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

 	assert.Equal("0", RoundToString(0, 0))
@@ -63,6 +75,8 @@ func TestRoundToString(t *testing.T) {
 }

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

 	assert.Equal(float64(0), TruncRound(0, 0))
@@ -74,6 +88,8 @@ func TestTruncRound(t *testing.T) {
 }

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

 	assert.Equal(0, Average(0, 0))
@@ -84,6 +100,8 @@ func TestAverage(t *testing.T) {
 }

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

 	assert.Equal(1, Sum(0, 1))
@@ -91,6 +109,8 @@ func TestSum(t *testing.T) {
 }

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

 	assert.Equal(0, Max(0, 0))
@@ -102,6 +122,8 @@ func TestMax(t *testing.T) {
 }

 func TestMaxBy(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "MaxBy")

 	res1 := MaxBy([]string{"a", "ab", "abc"}, func(v1, v2 string) bool {
@@ -121,6 +143,8 @@ func TestMaxBy(t *testing.T) {
 }

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

 	assert.Equal(0, Min(0, 0))
@@ -129,6 +153,8 @@ func TestMin(t *testing.T) {
 }

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

 	res1 := MinBy([]string{"a", "ab", "abc"}, func(v1, v2 string) bool {
@@ -148,6 +174,8 @@ func TestMinBy(t *testing.T) {
 }

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

 	result1 := Range(1, 4)
@@ -164,6 +192,8 @@ func TestRange(t *testing.T) {
 }

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

 	result1 := RangeWithStep(1, 4, 1)
@@ -178,6 +208,8 @@ func TestRangeWithStep(t *testing.T) {
 }

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

 	result1 := AngleToRadian(45)
@@ -190,6 +222,8 @@ func TestAngleToRadian(t *testing.T) {
 }

 func TestRadianToAngle(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestAngleToRadian")

 	result1 := RadianToAngle(math.Pi)
@@ -202,6 +236,8 @@ func TestRadianToAngle(t *testing.T) {
 }

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

 	result1 := PointDistance(1, 1, 4, 5)
@@ -210,6 +246,8 @@ func TestPointDistance(t *testing.T) {
 }

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

 	assert.Equal(false, IsPrime(-1))
@@ -221,6 +259,8 @@ func TestIsPrime(t *testing.T) {
 }

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

 	assert.Equal(1, GCD(1, 1))
@@ -246,6 +286,8 @@ func TestGCD(t *testing.T) {
 }

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

 	assert.Equal(1, LCM(1))
@@ -259,6 +301,8 @@ func TestLCM(t *testing.T) {
 }

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

 	assert.EqualValues(1, Cos(0))
@@ -269,6 +313,8 @@ func TestCos(t *testing.T) {
 }

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

 	assert.EqualValues(0, Sin(0))
@@ -279,9 +325,25 @@ func TestSin(t *testing.T) {
 }

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

 	assert.EqualValues(3, Log(8, 2))
 	assert.EqualValues(3, TruncRound(Log(27, 3), 0))
 	assert.EqualValues(2.32, TruncRound(Log(5, 2), 2))
 }
+
+func TestAbs(t *testing.T) {
+	t.Parallel()
+
+	assert := internal.NewAssert(t, "TestAbs")
+
+	assert.Equal(0, Abs(0))
+	assert.Equal(1, Abs(-1))
+
+	assert.Equal(0.1, Abs(-0.1))
+
+	assert.Equal(int64(1), Abs(int64(-1)))
+	assert.Equal(float32(1), Abs(float32(-1)))
+}
--- a/netutil/http_test.go
+++ b/netutil/http_test.go
@@ -126,6 +126,8 @@ func TestHttpDelete(t *testing.T) {
 }

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

 	var m = map[string]any{
@@ -133,6 +135,7 @@ func TestConvertMapToQueryString(t *testing.T) {
 		"a": 1,
 		"b": 2,
 	}
+
 	assert.Equal("a=1&b=2&c=3", ConvertMapToQueryString(m))
 }

@@ -163,6 +166,8 @@ func TestParseResponse(t *testing.T) {
 }

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

 	request := &HttpRequest{
@@ -218,6 +223,8 @@ func TestHttpClent_Post(t *testing.T) {
 }

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

 	type TodoQuery struct {
--- a/netutil/net_test.go
+++ b/netutil/net_test.go
@@ -9,6 +9,8 @@ import (
 )

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

 	internalIp := GetInternalIp()
@@ -17,6 +19,8 @@ func TestGetInternalIp(t *testing.T) {
 }

 func TestGetRequestPublicIp(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestGetPublicIpInfo")

 	ip := "36.112.24.10"
@@ -50,6 +54,8 @@ func TestGetRequestPublicIp(t *testing.T) {
 // }

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

 	ips := []net.IP{
@@ -69,6 +75,8 @@ func TestIsPublicIP(t *testing.T) {
 }

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

 	ips := []net.IP{
@@ -110,14 +118,9 @@ func TestEncodeUrl(t *testing.T) {
 	assert.Equal(expected, encodedUrl)
 }

-// func TestDownloadFile(t *testing.T) {
-// 	assert := internal.NewAssert(t, "TestDownloadFile")
-
-// 	err := DownloadFile("./lancet_logo.jpg", "https://picx.zhimg.com/v2-fc82a4199749de9cfb71e32e54f489d3_720w.jpg?source=172ae18b")
-// 	assert.IsNil(err)
-// }
-
 func TestIsPingConnected(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestIsPingConnected")

 	// in github action env, this will fail
@@ -129,6 +132,8 @@ func TestIsPingConnected(t *testing.T) {
 }

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

 	result1 := IsTelnetConnected("bing.com", "80")
--- a/pointer/pointer.go
+++ b/pointer/pointer.go
@@ -7,19 +7,19 @@ package pointer
 import "reflect"

 // Of returns a pointer to the value `v`.
-// Play: todo
+// Play: https://go.dev/play/p/HFd70x4DrMj
 func Of[T any](v T) *T {
 	return &v
 }

 // Unwrap returns the value from the pointer.
-// Play: todo
+// Play: https://go.dev/play/p/cgeu3g7cjWb
 func Unwrap[T any](p *T) T {
 	return *p
 }

 // ExtractPointer returns the underlying value by the given interface type
-// Play: todo
+// Play: https://go.dev/play/p/D7HFjeWU2ZP
 func ExtractPointer(value any) any {
 	t := reflect.TypeOf(value)
 	v := reflect.ValueOf(value)
--- a/pointer/pointer_test.go
+++ b/pointer/pointer_test.go
@@ -7,6 +7,8 @@ import (
 )

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

 	result1 := Of(123)
@@ -17,6 +19,8 @@ func TestOf(t *testing.T) {
 }

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

 	a := 123
@@ -27,6 +31,8 @@ func TestUnwrap(t *testing.T) {
 }

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

 	a := 1
--- a/promise/promise_test.go
+++ b/promise/promise_test.go
@@ -9,6 +9,8 @@ import (
 )

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

 	p := Resolve("abc")
@@ -18,6 +20,8 @@ func TestResolve(t *testing.T) {
 }

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

 	err := errors.New("error")
@@ -28,6 +32,8 @@ func TestReject(t *testing.T) {
 }

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

 	p1 := New(func(resolve func(string), reject func(error)) {
@@ -48,6 +54,8 @@ func TestThen(t *testing.T) {
 }

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

 	p1 := New(func(resolve func(int), reject func(error)) {
@@ -68,6 +76,8 @@ func TestPromise_Then(t *testing.T) {
 }

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

 	p1 := New(func(resolve func(string), reject func(error)) {
@@ -93,6 +103,8 @@ func TestCatch(t *testing.T) {
 }

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

 	p1 := New(func(resolve func(string), reject func(error)) {
@@ -118,6 +130,8 @@ func TestPromise_Catch(t *testing.T) {
 }

 func TestAll(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestPromise_All")

 	t.Run("AllPromisesFullfilled", func(_ *testing.T) {
@@ -180,7 +194,6 @@ func TestAll(t *testing.T) {
 		_, err := p.Await()

 		assert.IsNotNil(err)
-		// assert.Equal("error1", err.Error())
 	})

 }
@@ -227,7 +240,6 @@ func TestAny(t *testing.T) {
 		_, err := p.Await()

 		assert.IsNotNil(err)
-		// assert.Equal("error1", err.Error())
 	})

 }
@@ -275,7 +287,6 @@ func TestRace(t *testing.T) {
 		val, err := p.Await()

 		assert.IsNotNil(err)
-		// assert.Equal("error1", err.Error())
 		assert.Equal("", val)
 	})

@@ -296,7 +307,6 @@ func TestRace(t *testing.T) {
 		_, err := p.Await()

 		assert.IsNotNil(err)
-		// assert.Equal("error1", err.Error())
 	})

 }
--- a/random/random.go
+++ b/random/random.go
@@ -116,7 +116,7 @@ func UUIdV4() (string, error) {
 }

 // RandUniqueIntSlice generate a slice of random int of length n that do not repeat.
-// Play: todo
+// Play: https://go.dev/play/p/uBkRSOz73Ec
 func RandUniqueIntSlice(n, min, max int) []int {
 	if min > max {
 		return []int{}
--- a/random/random_test.go
+++ b/random/random_test.go
@@ -9,6 +9,8 @@ import (
 )

 func TestRandString(t *testing.T) {
+	t.Parallel()
+
 	pattern := `^[a-zA-Z]+$`
 	reg := regexp.MustCompile(pattern)

@@ -20,6 +22,8 @@ func TestRandString(t *testing.T) {
 }

 func TestRandUpper(t *testing.T) {
+	t.Parallel()
+
 	pattern := `^[A-Z]+$`
 	reg := regexp.MustCompile(pattern)

@@ -31,6 +35,8 @@ func TestRandUpper(t *testing.T) {
 }

 func TestRandLower(t *testing.T) {
+	t.Parallel()
+
 	pattern := `^[a-z]+$`
 	reg := regexp.MustCompile(pattern)

@@ -42,6 +48,8 @@ func TestRandLower(t *testing.T) {
 }

 func TestRandNumeral(t *testing.T) {
+	t.Parallel()
+
 	pattern := `^[0-9]+$`
 	reg := regexp.MustCompile(pattern)

@@ -53,6 +61,8 @@ func TestRandNumeral(t *testing.T) {
 }

 func TestRandNumeralOrLetter(t *testing.T) {
+	t.Parallel()
+
 	pattern := `^[0-9a-zA-Z]+$`
 	reg := regexp.MustCompile(pattern)

@@ -64,6 +74,8 @@ func TestRandNumeralOrLetter(t *testing.T) {
 }

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

 	r1 := RandInt(1, 10)
@@ -79,6 +91,8 @@ func TestRandInt(t *testing.T) {
 }

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

 	randBytes := RandBytes(4)
@@ -93,6 +107,8 @@ func TestRandBytes(t *testing.T) {
 }

 func TestUUIdV4(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestUUIdV4")

 	uuid, err := UUIdV4()
@@ -105,6 +121,8 @@ func TestUUIdV4(t *testing.T) {
 }

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

 	r1 := RandUniqueIntSlice(5, 0, 9)
--- a/retry/retry_test.go
+++ b/retry/retry_test.go
@@ -10,6 +10,8 @@ import (
 )

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

 	var number int
@@ -25,6 +27,8 @@ func TestRetryFailed(t *testing.T) {
 }

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

 	var number int
@@ -43,6 +47,8 @@ func TestRetrySucceeded(t *testing.T) {
 }

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

 	var number int
@@ -58,6 +64,8 @@ func TestSetRetryTimes(t *testing.T) {
 }

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

 	ctx, cancel := context.WithCancel(context.TODO())
--- a/slice/slice_test.go
+++ b/slice/slice_test.go
@@ -10,6 +10,8 @@ import (
 )

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

 	assert.Equal(true, Contain([]string{"a", "b", "c"}, "a"))
@@ -21,6 +23,8 @@ func TestContain(t *testing.T) {
 }

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

 	type foo struct {
@@ -43,6 +47,8 @@ func TestContainBy(t *testing.T) {
 }

 func TestContainSubSlice(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestContainSubSlice")
 	assert.Equal(true, ContainSubSlice([]string{"a", "a", "b", "c"}, []string{"a", "a"}))
 	assert.Equal(false, ContainSubSlice([]string{"a", "a", "b", "c"}, []string{"a", "d"}))
@@ -51,6 +57,8 @@ func TestContainSubSlice(t *testing.T) {
 }

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

 	arr := []string{"a", "b", "c", "d", "e"}
@@ -79,6 +87,8 @@ func TestChunk(t *testing.T) {
 }

 func TestCompact(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TesCompact")

 	assert.Equal([]int{}, Compact([]int{0}))
@@ -90,6 +100,8 @@ func TestCompact(t *testing.T) {
 }

 func TestConcat(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "Concat")

 	assert.Equal([]int{1, 2, 3, 4, 5}, Concat([]int{1, 2, 3}, []int{4, 5}))
@@ -97,6 +109,8 @@ func TestConcat(t *testing.T) {
 }

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

 	slice1 := []int{1, 2, 3}
@@ -115,6 +129,8 @@ func FuzzEqual(f *testing.F) {
 }

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

 	slice1 := []int{1, 2, 3}
@@ -128,6 +144,8 @@ func TestEqualWith(t *testing.T) {
 }

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

 	nums := []int{1, 2, 3, 5}
@@ -139,6 +157,8 @@ func TestEvery(t *testing.T) {
 }

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

 	nums := []int{1, 2, 3, 5}
@@ -150,6 +170,8 @@ func TestNone(t *testing.T) {
 }

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

 	nums := []int{1, 2, 3, 5}
@@ -161,6 +183,8 @@ func TestSome(t *testing.T) {
 }

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

 	nums := []int{1, 2, 3, 4, 5}
@@ -193,6 +217,8 @@ func TestFilter(t *testing.T) {
 }

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

 	nums := []int{1, 2, 3, 4, 5, 6}
@@ -206,6 +232,8 @@ func TestGroupBy(t *testing.T) {
 }

 func TestGroupWith(t *testing.T) {
+	t.Parallel()
+
 	nums := []float64{6.1, 4.2, 6.3}
 	floor := func(num float64) float64 {
 		return math.Floor(num)
@@ -220,6 +248,8 @@ func TestGroupWith(t *testing.T) {
 }

 func TestCount(t *testing.T) {
+	t.Parallel()
+
 	numbers := []int{1, 2, 3, 3, 5, 6}

 	assert := internal.NewAssert(t, "TestCountBy")
@@ -229,6 +259,8 @@ func TestCount(t *testing.T) {
 }

 func TestCountBy(t *testing.T) {
+	t.Parallel()
+
 	nums := []int{1, 2, 3, 4, 5, 6}
 	evenFunc := func(i, num int) bool {
 		return (num % 2) == 0
@@ -239,6 +271,8 @@ func TestCountBy(t *testing.T) {
 }

 func TestFind(t *testing.T) {
+	t.Parallel()
+
 	nums := []int{1, 2, 3, 4, 5}
 	even := func(i, num int) bool {
 		return num%2 == 0
@@ -251,6 +285,8 @@ func TestFind(t *testing.T) {
 }

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

 	nums := []int{1, 2, 3, 4, 5}
@@ -269,6 +305,8 @@ func TestFindBy(t *testing.T) {
 }

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

 	nums := []int{1, 2, 3, 4, 5}
@@ -289,6 +327,8 @@ func TestFindLastBy(t *testing.T) {
 }

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

 	nums := []int{1, 2, 3, 4, 5}
@@ -304,6 +344,8 @@ func TestFindLast(t *testing.T) {
 }

 func TestFindFoundNothing(t *testing.T) {
+	t.Parallel()
+
 	nums := []int{1, 1, 1, 1, 1, 1}
 	findFunc := func(i, num int) bool {
 		return num > 1
@@ -315,6 +357,8 @@ func TestFindFoundNothing(t *testing.T) {
 }

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

 	input := [][][]string{{{"a", "b"}}, {{"c", "d"}}}
@@ -324,6 +368,8 @@ func TestFlatten(t *testing.T) {
 }

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

 	input := [][][]string{{{"a", "b"}}, {{"c", "d"}}}
@@ -333,6 +379,8 @@ func TestFlattenDeep(t *testing.T) {
 }

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

 	numbers := []int{1, 2, 3, 4, 5}
@@ -348,6 +396,8 @@ func TestForEach(t *testing.T) {
 }

 func TestForEachWithBreak(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestForEach")

 	numbers := []int{1, 2, 3, 4, 5}
@@ -366,6 +416,8 @@ func TestForEachWithBreak(t *testing.T) {
 }

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

 	nums := []int{1, 2, 3, 4}
@@ -398,6 +450,8 @@ func TestMap(t *testing.T) {
 }

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

 	nums := []int{1, 2, 3, 4, 5}
@@ -415,6 +469,8 @@ func TestFilterMap(t *testing.T) {
 }

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

 	nums := []int{1, 2, 3, 4}
@@ -428,6 +484,8 @@ func TestFlatMap(t *testing.T) {
 }

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

 	cases := [][]int{
@@ -448,6 +506,8 @@ func TestReduce(t *testing.T) {
 }

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

 	result1 := ReduceBy([]int{1, 2, 3, 4}, 0, func(_ int, item int, agg int) int {
@@ -464,6 +524,8 @@ func TestReduceBy(t *testing.T) {
 }

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

 	result := ReduceRight([]int{1, 2, 3, 4}, "", func(_ int, item int, agg string) string {
@@ -474,6 +536,8 @@ func TestReduceRight(t *testing.T) {
 }

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

 	var nums []any
@@ -483,6 +547,8 @@ func TestIntSlice(t *testing.T) {
 }

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

 	var strs []any
@@ -492,6 +558,8 @@ func TestStringSlice(t *testing.T) {
 }

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

 	strs := []string{"a", "b", "c"}
@@ -501,6 +569,8 @@ func TestInterfaceSlice(t *testing.T) {
 }

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

 	assert.Equal([]string{"a", "b", "c"}, DeleteAt([]string{"a", "b", "c"}, -1))
@@ -518,6 +588,8 @@ func TestDeleteAt(t *testing.T) {
 }

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

 	assert.Equal([]int{}, Drop([]int{}, 0))
@@ -533,6 +605,8 @@ func TestDrop(t *testing.T) {
 }

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

 	assert.Equal([]int{}, DropRight([]int{}, 0))
@@ -548,6 +622,8 @@ func TestDropRight(t *testing.T) {
 }

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

 	numbers := []int{1, 2, 3, 4, 5}
@@ -569,6 +645,8 @@ func TestDropWhile(t *testing.T) {
 }

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

 	numbers := []int{1, 2, 3, 4, 5}
@@ -590,6 +668,8 @@ func TestDropRightWhile(t *testing.T) {
 }

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

 	strs := []string{"a", "b", "c"}
@@ -604,6 +684,8 @@ func TestInsertAt(t *testing.T) {
 }

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

 	assert.Equal([]string{"a", "b", "c"}, UpdateAt([]string{"a", "b", "c"}, -1, "1"))
@@ -613,6 +695,8 @@ func TestUpdateAt(t *testing.T) {
 }

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

 	assert.Equal([]int{1, 2, 3}, Unique([]int{1, 2, 2, 3}))
@@ -620,6 +704,8 @@ func TestUnique(t *testing.T) {
 }

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

 	actual := UniqueBy([]int{1, 2, 3, 4, 5, 6}, func(val int) int {
@@ -629,6 +715,8 @@ func TestUniqueBy(t *testing.T) {
 }

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

 	s1 := []int{1, 3, 4, 6}
@@ -641,6 +729,8 @@ func TestUnion(t *testing.T) {
 }

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

 	testFunc := func(i int) int {
@@ -652,6 +742,8 @@ func TestUnionBy(t *testing.T) {
 }

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

 	s1 := []int{1, 2, 3, 4}
@@ -664,6 +756,8 @@ func TestMerge(t *testing.T) {
 }

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

 	s1 := []int{1, 2, 2, 3}
@@ -690,6 +784,8 @@ func TestIntersection(t *testing.T) {
 }

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

 	s1 := []int{1, 2, 3}
@@ -702,6 +798,8 @@ func TestSymmetricDifference(t *testing.T) {
 }

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

 	s1 := []int{1, 2, 3, 4, 5}
@@ -714,6 +812,8 @@ func TestReverse(t *testing.T) {
 }

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

 	s1 := []int{1, 2, 3, 4, 5}
@@ -723,6 +823,8 @@ func TestDifference(t *testing.T) {
 }

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

 	s1 := []int{1, 2, 3, 4, 5}
@@ -735,6 +837,8 @@ func TestDifferenceWith(t *testing.T) {
 }

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

 	s1 := []int{1, 2, 3, 4, 5} // after add one: 2 3 4 5 6
@@ -747,6 +851,8 @@ func TestDifferenceBy(t *testing.T) {
 }

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

 	assert.Equal(true, IsAscending([]int{1, 2, 3, 4, 5}))
@@ -755,6 +861,8 @@ func TestIsAscending(t *testing.T) {
 }

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

 	assert.Equal(true, IsDescending([]int{5, 4, 3, 2, 1}))
@@ -763,6 +871,8 @@ func TestIsDescending(t *testing.T) {
 }

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

 	assert.Equal(true, IsSorted([]int{5, 4, 3, 2, 1}))
@@ -771,6 +881,8 @@ func TestIsSorted(t *testing.T) {
 }

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

 	assert.Equal(true, IsSortedByKey([]string{"a", "ab", "abc"}, func(s string) int {
@@ -787,6 +899,8 @@ func TestIsSortedByKey(t *testing.T) {
 }

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

 	numbers := []int{1, 4, 3, 2, 5}
@@ -807,6 +921,8 @@ func TestSort(t *testing.T) {
 }

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

 	numbers := []int{1, 4, 3, 2, 5}
@@ -836,6 +952,8 @@ func TestSortBy(t *testing.T) {
 }

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

 	type student struct {
@@ -862,6 +980,8 @@ func TestSortByFielDesc(t *testing.T) {
 }

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

 	type student struct {
@@ -888,12 +1008,16 @@ func TestSortByFieldAsc(t *testing.T) {
 }

 func TestWithout(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestWithout")
 	assert.Equal([]int{3, 4, 5}, Without([]int{1, 2, 3, 4, 5}, 1, 2))
 	assert.Equal([]int{1, 2, 3, 4, 5}, Without([]int{1, 2, 3, 4, 5}))
 }

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

 	numbers := []int{1, 2, 3, 4, 5}
@@ -903,6 +1027,8 @@ func TestShuffle(t *testing.T) {
 }

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

 	arr := []string{"a", "a", "b", "c"}
@@ -942,6 +1068,8 @@ func TestIndexOf(t *testing.T) {
 }

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

 	arr := []string{"a", "b", "b", "c"}
@@ -951,6 +1079,8 @@ func TestLastIndexOf(t *testing.T) {
 }

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

 	str1 := "a"
@@ -960,6 +1090,8 @@ func TestToSlice(t *testing.T) {
 }

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

 	str1 := "a"
@@ -969,6 +1101,8 @@ func TestToSlicePointer(t *testing.T) {
 }

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

 	str1 := []string{"a", "b"}
@@ -977,6 +1111,8 @@ func TestAppendIfAbsent(t *testing.T) {
 }

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

 	strs := []string{"a", "b", "a", "c", "d", "a"}
@@ -995,6 +1131,8 @@ func TestReplace(t *testing.T) {
 }

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

 	strs := []string{"a", "b", "a", "c", "d", "a"}
@@ -1004,6 +1142,8 @@ func TestReplaceAll(t *testing.T) {
 }

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

 	result := KeyBy([]string{"a", "ab", "abc"}, func(str string) int {
@@ -1014,6 +1154,8 @@ func TestKeyBy(t *testing.T) {
 }

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

 	assert.Equal([]string{}, Repeat("a", 0))
--- a/stream/stream_test.go
+++ b/stream/stream_test.go
@@ -8,6 +8,8 @@ import (
 )

 func TestOf(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestFromSlice")

 	stream := Of(1, 2, 3)
@@ -15,6 +17,8 @@ func TestOf(t *testing.T) {
 }

 func TestGenerate(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestFromSlice")

 	n := 0
@@ -33,14 +37,17 @@ func TestGenerate(t *testing.T) {
 }

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

 	stream := FromSlice([]int{1, 2, 3})
-
 	assert.Equal([]int{1, 2, 3}, stream.ToSlice())
 }

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

 	ch := make(chan int)
@@ -57,6 +64,8 @@ func TestFromChannel(t *testing.T) {
 }

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

 	s1 := FromRange(1, 5, 1)
@@ -67,6 +76,8 @@ func TestFromRange(t *testing.T) {
 }

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

 	nums := FromSlice([]int{1, 2, 2, 3, 3, 3})
@@ -99,6 +110,8 @@ func TestStream_Distinct(t *testing.T) {
 }

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

 	stream := FromSlice([]int{1, 2, 3, 4, 5})
--- a/structs/field_test.go
+++ b/structs/field_test.go
@@ -1,12 +1,15 @@
 package structs

 import (
-	"github.com/duke-git/lancet/v2/internal"
 	"reflect"
 	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
 )

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

 	type Parent struct {
@@ -17,11 +20,14 @@ func TestField_Tag(t *testing.T) {
 	s := New(p1)
 	n, _ := s.Field("Name")
 	tag := n.Tag()
+
 	assert.Equal("name", tag.Name)
 	assert.Equal(true, tag.HasOption("omitempty"))
 }

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

 	type Parent struct {
@@ -36,7 +42,10 @@ func TestField_Value(t *testing.T) {
 }

 func TestField_IsEmbedded(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestField_IsEmbedded")
+
 	type Parent struct {
 		Name string
 	}
@@ -51,11 +60,14 @@ func TestField_IsEmbedded(t *testing.T) {
 	s := New(c1)
 	n, _ := s.Field("Name")
 	a, _ := s.Field("Age")
+
 	assert.Equal(true, n.IsEmbedded())
 	assert.Equal(false, a.IsEmbedded())
 }

 func TestField_IsExported(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestField_IsEmbedded")

 	type Parent struct {
@@ -66,11 +78,14 @@ func TestField_IsExported(t *testing.T) {
 	s := New(p1)
 	n, _ := s.Field("Name")
 	a, _ := s.Field("age")
+
 	assert.Equal(true, n.IsExported())
 	assert.Equal(false, a.IsExported())
 }

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

 	type Parent struct {
@@ -81,11 +96,14 @@ func TestField_IsZero(t *testing.T) {
 	s := New(p1)
 	n, _ := s.Field("Name")
 	a, _ := s.Field("Age")
+
 	assert.Equal(true, n.IsZero())
 	assert.Equal(false, a.IsZero())
 }

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

 	type Parent struct {
@@ -102,6 +120,8 @@ func TestField_Name(t *testing.T) {
 }

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

 	type Parent struct {
@@ -118,6 +138,8 @@ func TestField_Kind(t *testing.T) {
 }

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

 	type Parent struct {
@@ -133,6 +155,8 @@ func TestField_IsSlice(t *testing.T) {
 }

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

 	t.Run("nested struct", func(t *testing.T) {
--- a/structs/struct_test.go
+++ b/structs/struct_test.go
@@ -8,8 +8,9 @@ import (
 )

 func TestStruct_ToMap(t *testing.T) {
-	assert := internal.NewAssert(t, "TestStruct_ToMap")
+	t.Parallel()

+	assert := internal.NewAssert(t, "TestStruct_ToMap")
 	t.Run("invalid struct", func(t *testing.T) {
 		m, _ := ToMap(1)
 		var expected map[string]any
@@ -65,6 +66,8 @@ func TestStruct_ToMap(t *testing.T) {
 }

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

 	type Parent struct {
@@ -91,6 +94,8 @@ func TestStruct_Fields(t *testing.T) {
 }

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

 	type Parent struct {
@@ -109,6 +114,7 @@ func TestStruct_Field(t *testing.T) {

 	s := New(p1)
 	a, ok := s.Field("A")
+
 	assert.Equal(true, ok)
 	assert.Equal(reflect.String, a.Kind())
 	assert.Equal("1", a.Value())
@@ -118,6 +124,8 @@ func TestStruct_Field(t *testing.T) {
 }

 func TestStruct_IsStruct(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestStruct_Field")

 	type Test1 struct{}
--- a/strutil/string.go
+++ b/strutil/string.go
@@ -561,7 +561,7 @@ var (

 // RemoveWhiteSpace remove whitespace characters from a string.
 // when set repalceAll is true removes all whitespace, false only replaces consecutive whitespace characters with one space.
-// Play: todo
+// Play: https://go.dev/play/p/HzLC9vsTwkf
 func RemoveWhiteSpace(str string, repalceAll bool) string {
 	if repalceAll && str != "" {
 		return strings.Join(strings.Fields(str), "")
--- a/strutil/string_test.go
+++ b/strutil/string_test.go
@@ -8,6 +8,8 @@ import (
 )

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

 	cases := map[string]string{
@@ -27,6 +29,8 @@ func TestCamelCase(t *testing.T) {
 }

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

 	cases := map[string]string{
@@ -46,6 +50,8 @@ func TestCapitalize(t *testing.T) {
 }

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

 	cases := map[string]string{
@@ -69,6 +75,8 @@ func TestKebabCase(t *testing.T) {
 }

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

 	cases := map[string]string{
@@ -92,6 +100,8 @@ func TestUpperKebabCase(t *testing.T) {
 }

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

 	cases := map[string]string{
@@ -115,6 +125,8 @@ func TestSnakeCase(t *testing.T) {
 }

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

 	cases := map[string]string{
@@ -138,6 +150,8 @@ func TestUpperSnakeCase(t *testing.T) {
 }

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

 	cases := map[string]string{
@@ -154,6 +168,8 @@ func TestUpperFirst(t *testing.T) {
 }

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

 	cases := map[string]string{
@@ -170,6 +186,8 @@ func TestLowerFirst(t *testing.T) {
 }

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

 	assert.Equal("a ", Pad("a", 2, ""))
@@ -192,6 +210,8 @@ func TestPadEnd(t *testing.T) {
 }

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

 	assert.Equal("a", PadStart("a", 1, "b"))
@@ -204,6 +224,8 @@ func TestPadStart(t *testing.T) {
 }

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

 	assert.Equal("lancet", Before("lancet", ""))
@@ -213,6 +235,8 @@ func TestBefore(t *testing.T) {
 }

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

 	assert.Equal("lancet", BeforeLast("lancet", ""))
@@ -223,6 +247,8 @@ func TestBeforeLast(t *testing.T) {
 }

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

 	assert.Equal("lancet", After("lancet", ""))
@@ -232,6 +258,8 @@ func TestAfter(t *testing.T) {
 }

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

 	assert.Equal("lancet", AfterLast("lancet", ""))
@@ -243,6 +271,8 @@ func TestAfterLast(t *testing.T) {
 }

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

 	assert.Equal(true, IsString("lancet"))
@@ -253,6 +283,8 @@ func TestIsString(t *testing.T) {
 }

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

 	assert.Equal("cba", Reverse("abc"))
@@ -260,6 +292,8 @@ func TestReverse(t *testing.T) {
 }

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

 	assert.Equal("ab", Wrap("ab", ""))
@@ -270,6 +304,8 @@ func TestWrap(t *testing.T) {
 }

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

 	assert.Equal("", Unwrap("", "*"))
@@ -288,6 +324,8 @@ func TestUnwrap(t *testing.T) {
 }

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

 	assert.Equal([]string{}, SplitEx(" a b c ", "", true))
@@ -300,6 +338,8 @@ func TestSplitEx(t *testing.T) {
 }

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

 	assert.Equal("bcd", Substring("abcde", 1, 3))
@@ -311,6 +351,8 @@ func TestSubstring(t *testing.T) {
 }

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

 	cases := map[string][]string{
@@ -327,6 +369,8 @@ func TestSplitWords(t *testing.T) {
 }

 func TestWordCount(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestSplitWords")

 	cases := map[string]int{
@@ -343,6 +387,8 @@ func TestWordCount(t *testing.T) {
 }

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

 	assert.Equal("hello world", RemoveNonPrintable("hello\u00a0 \u200bworld\n"))
@@ -350,47 +396,67 @@ func TestRemoveNonPrintable(t *testing.T) {
 }

 func TestStringToBytes(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestStringToBytes")
+
 	str := "abc"
 	bytes := StringToBytes(str)
+
 	assert.Equal(reflect.DeepEqual(bytes, []byte{'a', 'b', 'c'}), true)
 }

 func TestBytesToString(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestBytesToString")
+
 	bytes := []byte{'a', 'b', 'c'}
 	str := BytesToString(bytes)
+
 	assert.Equal(str == "abc", true)
 }

 func TestIsBlank(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestIsBlank")
 	assert.Equal(IsBlank(""), true)
 	assert.Equal(IsBlank("\t\v\f\n"), true)
+
 	assert.Equal(IsBlank(" 中文"), false)
 }

 func TestHasPrefixAny(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestHasPrefixAny")
 	str := "foo bar"
 	prefixes := []string{"fo", "xyz", "hello"}
 	notMatches := []string{"oom", "world"}
+
 	assert.Equal(HasPrefixAny(str, prefixes), true)
 	assert.Equal(HasPrefixAny(str, notMatches), false)
 }

 func TestHasSuffixAny(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestHasSuffixAny")
 	str := "foo bar"
 	suffixes := []string{"bar", "xyz", "hello"}
 	notMatches := []string{"oom", "world"}
+
 	assert.Equal(HasSuffixAny(str, suffixes), true)
 	assert.Equal(HasSuffixAny(str, notMatches), false)
 }

 func TestIndexOffset(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestIndexOffset")
 	str := "foo bar hello world"
+
 	assert.Equal(IndexOffset(str, "o", 5), 12)
 	assert.Equal(IndexOffset(str, "o", 0), 1)
 	assert.Equal(IndexOffset(str, "d", len(str)-1), len(str)-1)
@@ -399,6 +465,8 @@ func TestIndexOffset(t *testing.T) {
 }

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

 	str := "ac ab ab ac"
@@ -412,6 +480,8 @@ func TestReplaceWithMap(t *testing.T) {
 }

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

 	str1 := "$ ab	cd $ "
@@ -422,6 +492,8 @@ func TestTrim(t *testing.T) {
 }

 func TestSplitAndTrim(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestTrim")

 	str := " a,b, c,d,$1 "
@@ -434,6 +506,8 @@ func TestSplitAndTrim(t *testing.T) {
 }

 func TestHideString(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestTrim")

 	str := "13242658976"
@@ -452,6 +526,8 @@ func TestHideString(t *testing.T) {
 }

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

 	assert.Equal(true, ContainsAll("hello world", []string{"hello", "world"}))
@@ -460,6 +536,8 @@ func TestContainsAll(t *testing.T) {
 }

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

 	assert.Equal(true, ContainsAny("hello world", []string{"hello", "world"}))
--- a/system/os_test.go
+++ b/system/os_test.go
@@ -8,6 +8,8 @@ import (
 )

 func TestOsDetection(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestOsJudgment")

 	osType, _, _ := ExecCommand("echo $OSTYPE")
@@ -20,6 +22,8 @@ func TestOsDetection(t *testing.T) {
 }

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

 	envNotExist := GetOsEnv("foo")
@@ -44,6 +48,8 @@ func TestOsEnvOperation(t *testing.T) {
 }

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

 	// linux or mac
@@ -79,6 +85,8 @@ func TestExecCommand(t *testing.T) {
 // }

 func TestGetOsBits(t *testing.T) {
+	t.Parallel()
+
 	osBits := GetOsBits()
 	switch osBits {
 	case 32, 64:
--- a/tuple/tuple.go
+++ b/tuple/tuple.go
@@ -0,0 +1,641 @@
+// Copyright 2023 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package tuple implements tuple data type and some operations on it.
+package tuple
+
+import "github.com/duke-git/lancet/v2/mathutil"
+
+// Tuple2 represents a 2 elemnets tuple
+type Tuple2[A any, B any] struct {
+	FieldA A
+	FieldB B
+}
+
+// Unbox returns values in tuple.
+// Play: todo
+func (t Tuple2[A, B]) Unbox() (A, B) {
+	return t.FieldA, t.FieldB
+}
+
+// NewTuple2 creates a 2 elemnets tuple from a list of values.
+// Play: todo
+func NewTuple2[A any, B any](a A, b B) Tuple2[A, B] {
+	return Tuple2[A, B]{FieldA: a, FieldB: b}
+}
+
+// Zip2 create a slice of Tuple2, whose elements are correspond to the given slice elements.
+// Play: todo
+func Zip2[A any, B any](a []A, b []B) []Tuple2[A, B] {
+	size := mathutil.Max(len(a), len(b))
+
+	tuples := make([]Tuple2[A, B], size)
+
+	for i := 0; i < size; i++ {
+		v1, _ := getByIndex(a, i)
+		v2, _ := getByIndex(b, i)
+
+		tuples[i] = Tuple2[A, B]{FieldA: v1, FieldB: v2}
+	}
+
+	return tuples
+}
+
+// Unzip2 creates a group of slice from a slice of Tuple2.
+// Play: todo
+func Unzip2[A any, B any](tuples []Tuple2[A, B]) ([]A, []B) {
+	size := len(tuples)
+
+	r1 := make([]A, size)
+	r2 := make([]B, size)
+
+	for i, t := range tuples {
+		r1[i] = t.FieldA
+		r2[i] = t.FieldB
+	}
+
+	return r1, r2
+}
+
+// Tuple3 represents a 3 elemnets tuple
+type Tuple3[A any, B any, C any] struct {
+	FieldA A
+	FieldB B
+	FieldC C
+}
+
+// Unbox returns values in tuple.
+// Play: todo
+func (t Tuple3[A, B, C]) Unbox() (A, B, C) {
+	return t.FieldA, t.FieldB, t.FieldC
+}
+
+// NewTuple3 creates a 3 elemnets tuple from a list of values.
+// Play: todo
+func NewTuple3[A any, B any, C any](a A, b B, c C) Tuple3[A, B, C] {
+	return Tuple3[A, B, C]{FieldA: a, FieldB: b, FieldC: c}
+}
+
+// Zip3 create a slice of Tuple3, whose elements are correspond to the given slice elements.
+// Play: todo
+func Zip3[A any, B any, C any](a []A, b []B, c []C) []Tuple3[A, B, C] {
+	size := mathutil.Max(len(a), len(b), len(c))
+
+	tuples := make([]Tuple3[A, B, C], size)
+
+	for i := 0; i < size; i++ {
+		v1, _ := getByIndex(a, i)
+		v2, _ := getByIndex(b, i)
+		v3, _ := getByIndex(c, i)
+
+		tuples[i] = Tuple3[A, B, C]{FieldA: v1, FieldB: v2, FieldC: v3}
+	}
+
+	return tuples
+}
+
+// Unzip3 creates a group of slice from a slice of Tuple3.
+// Play: todo
+func Unzip3[A any, B any, C any](tuples []Tuple3[A, B, C]) ([]A, []B, []C) {
+	size := len(tuples)
+
+	r1 := make([]A, size)
+	r2 := make([]B, size)
+	r3 := make([]C, size)
+
+	for i, t := range tuples {
+		r1[i] = t.FieldA
+		r2[i] = t.FieldB
+		r3[i] = t.FieldC
+	}
+
+	return r1, r2, r3
+}
+
+// Tuple4 represents a 4 elemnets tuple
+type Tuple4[A any, B any, C any, D any] struct {
+	FieldA A
+	FieldB B
+	FieldC C
+	FieldD D
+}
+
+// Unbox returns values in tuple.
+// Play: todo
+func (t Tuple4[A, B, C, D]) Unbox() (A, B, C, D) {
+	return t.FieldA, t.FieldB, t.FieldC, t.FieldD
+}
+
+// NewTuple4 creates a 4 elemnets tuple from a list of values.
+// Play: todo
+func NewTuple4[A any, B any, C any, D any](a A, b B, c C, d D) Tuple4[A, B, C, D] {
+	return Tuple4[A, B, C, D]{FieldA: a, FieldB: b, FieldC: c, FieldD: d}
+}
+
+// Zip4 create a slice of Tuple4, whose elements are correspond to the given slice elements.
+// Play: todo
+func Zip4[A any, B any, C any, D any](a []A, b []B, c []C, d []D) []Tuple4[A, B, C, D] {
+	size := mathutil.Max(len(a), len(b), len(c), len(d))
+
+	tuples := make([]Tuple4[A, B, C, D], size)
+
+	for i := 0; i < size; i++ {
+		v1, _ := getByIndex(a, i)
+		v2, _ := getByIndex(b, i)
+		v3, _ := getByIndex(c, i)
+		v4, _ := getByIndex(d, i)
+
+		tuples[i] = Tuple4[A, B, C, D]{FieldA: v1, FieldB: v2, FieldC: v3, FieldD: v4}
+	}
+
+	return tuples
+}
+
+// Unzip4 creates a group of slice from a slice of Tuple4.
+// Play: todo
+func Unzip4[A any, B any, C any, D any](tuples []Tuple4[A, B, C, D]) ([]A, []B, []C, []D) {
+	size := len(tuples)
+
+	r1 := make([]A, size)
+	r2 := make([]B, size)
+	r3 := make([]C, size)
+	r4 := make([]D, size)
+
+	for i, t := range tuples {
+		r1[i] = t.FieldA
+		r2[i] = t.FieldB
+		r3[i] = t.FieldC
+		r4[i] = t.FieldD
+	}
+
+	return r1, r2, r3, r4
+}
+
+// Tuple5 represents a 5 elemnets tuple
+type Tuple5[A any, B any, C any, D any, E any] struct {
+	FieldA A
+	FieldB B
+	FieldC C
+	FieldD D
+	FieldE E
+}
+
+// Unbox returns values in tuple.
+// Play: todo
+func (t Tuple5[A, B, C, D, E]) Unbox() (A, B, C, D, E) {
+	return t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE
+}
+
+// NewTuple5 creates a 5 elemnets tuple from a list of values.
+// Play: todo
+func NewTuple5[A any, B any, C any, D any, E any](a A, b B, c C, d D, e E) Tuple5[A, B, C, D, E] {
+	return Tuple5[A, B, C, D, E]{FieldA: a, FieldB: b, FieldC: c, FieldD: d, FieldE: e}
+}
+
+// Zip5 create a slice of Tuple5, whose elements are correspond to the given slice elements.
+// Play: todo
+func Zip5[A any, B any, C any, D any, E any](a []A, b []B, c []C, d []D, e []E) []Tuple5[A, B, C, D, E] {
+	size := mathutil.Max(len(a), len(b), len(c), len(d), len(e))
+
+	tuples := make([]Tuple5[A, B, C, D, E], size)
+
+	for i := 0; i < size; i++ {
+		v1, _ := getByIndex(a, i)
+		v2, _ := getByIndex(b, i)
+		v3, _ := getByIndex(c, i)
+		v4, _ := getByIndex(d, i)
+		v5, _ := getByIndex(e, i)
+
+		tuples[i] = Tuple5[A, B, C, D, E]{
+			FieldA: v1, FieldB: v2, FieldC: v3,
+			FieldD: v4, FieldE: v5}
+	}
+
+	return tuples
+}
+
+// Unzip5 creates a group of slice from a slice of Tuple5.
+// Play: todo
+func Unzip5[A any, B any, C any, D any, E any](tuples []Tuple5[A, B, C, D, E]) ([]A, []B, []C, []D, []E) {
+	size := len(tuples)
+
+	r1 := make([]A, size)
+	r2 := make([]B, size)
+	r3 := make([]C, size)
+	r4 := make([]D, size)
+	r5 := make([]E, size)
+
+	for i, t := range tuples {
+		r1[i] = t.FieldA
+		r2[i] = t.FieldB
+		r3[i] = t.FieldC
+		r4[i] = t.FieldD
+		r5[i] = t.FieldE
+	}
+
+	return r1, r2, r3, r4, r5
+}
+
+// Tuple6 represents a 6 elemnets tuple
+type Tuple6[A any, B any, C any, D any, E any, F any] struct {
+	FieldA A
+	FieldB B
+	FieldC C
+	FieldD D
+	FieldE E
+	FieldF F
+}
+
+// Unbox returns values in tuple.
+// Play: todo
+func (t Tuple6[A, B, C, D, E, F]) Unbox() (A, B, C, D, E, F) {
+	return t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF
+}
+
+// NewTuple6 creates a 6 elemnets tuple from a list of values.
+// Play: todo
+func NewTuple6[A any, B any, C any, D any, E any, F any](a A, b B, c C, d D, e E, f F) Tuple6[A, B, C, D, E, F] {
+	return Tuple6[A, B, C, D, E, F]{FieldA: a, FieldB: b, FieldC: c, FieldD: d, FieldE: e, FieldF: f}
+}
+
+// Zip6 create a slice of Tuple6, whose elements are correspond to the given slice elements.
+// Play: todo
+func Zip6[A any, B any, C any, D any, E any, F any](a []A, b []B, c []C, d []D, e []E, f []F) []Tuple6[A, B, C, D, E, F] {
+	size := mathutil.Max(len(a), len(b), len(c), len(d), len(e), len(f))
+
+	tuples := make([]Tuple6[A, B, C, D, E, F], size)
+
+	for i := 0; i < size; i++ {
+		v1, _ := getByIndex(a, i)
+		v2, _ := getByIndex(b, i)
+		v3, _ := getByIndex(c, i)
+		v4, _ := getByIndex(d, i)
+		v5, _ := getByIndex(e, i)
+		v6, _ := getByIndex(f, i)
+
+		tuples[i] = Tuple6[A, B, C, D, E, F]{
+			FieldA: v1, FieldB: v2, FieldC: v3,
+			FieldD: v4, FieldE: v5, FieldF: v6}
+	}
+
+	return tuples
+}
+
+// Unzip6 creates a group of slice from a slice of Tuple6.
+// Play: todo
+func Unzip6[A any, B any, C any, D any, E any, F any](tuples []Tuple6[A, B, C, D, E, F]) ([]A, []B, []C, []D, []E, []F) {
+	size := len(tuples)
+
+	r1 := make([]A, size)
+	r2 := make([]B, size)
+	r3 := make([]C, size)
+	r4 := make([]D, size)
+	r5 := make([]E, size)
+	r6 := make([]F, size)
+
+	for i, t := range tuples {
+		r1[i] = t.FieldA
+		r2[i] = t.FieldB
+		r3[i] = t.FieldC
+		r4[i] = t.FieldD
+		r5[i] = t.FieldE
+		r6[i] = t.FieldF
+	}
+
+	return r1, r2, r3, r4, r5, r6
+}
+
+// Tuple7 represents a 7 elemnets tuple
+type Tuple7[A any, B any, C any, D any, E any, F any, G any] struct {
+	FieldA A
+	FieldB B
+	FieldC C
+	FieldD D
+	FieldE E
+	FieldF F
+	FieldG G
+}
+
+// Unbox returns values in tuple.
+// Play: todo
+func (t Tuple7[A, B, C, D, E, F, G]) Unbox() (A, B, C, D, E, F, G) {
+	return t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF, t.FieldG
+}
+
+// NewTuple7 creates a 7 elemnets tuple from a list of values.
+// Play: todo
+func NewTuple7[A any, B any, C any, D any, E any, F any, G any](a A, b B, c C, d D, e E, f F, g G) Tuple7[A, B, C, D, E, F, G] {
+	return Tuple7[A, B, C, D, E, F, G]{FieldA: a, FieldB: b, FieldC: c, FieldD: d, FieldE: e, FieldF: f, FieldG: g}
+}
+
+// Zip7 create a slice of Tuple7, whose elements are correspond to the given slice elements.
+// Play: todo
+func Zip7[A any, B any, C any, D any, E any, F any, G any](a []A, b []B, c []C, d []D, e []E, f []F, g []G) []Tuple7[A, B, C, D, E, F, G] {
+	size := mathutil.Max(len(a), len(b), len(c), len(d), len(e), len(f), len(g))
+
+	tuples := make([]Tuple7[A, B, C, D, E, F, G], size)
+
+	for i := 0; i < size; i++ {
+		v1, _ := getByIndex(a, i)
+		v2, _ := getByIndex(b, i)
+		v3, _ := getByIndex(c, i)
+		v4, _ := getByIndex(d, i)
+		v5, _ := getByIndex(e, i)
+		v6, _ := getByIndex(f, i)
+		v7, _ := getByIndex(g, i)
+
+		tuples[i] = Tuple7[A, B, C, D, E, F, G]{
+			FieldA: v1, FieldB: v2, FieldC: v3,
+			FieldD: v4, FieldE: v5, FieldF: v6,
+			FieldG: v7}
+	}
+
+	return tuples
+}
+
+// Unzip7 creates a group of slice from a slice of Tuple7.
+// Play: todo
+func Unzip7[A any, B any, C any, D any, E any, F any, G any](tuples []Tuple7[A, B, C, D, E, F, G]) ([]A, []B, []C, []D, []E, []F, []G) {
+	size := len(tuples)
+
+	r1 := make([]A, size)
+	r2 := make([]B, size)
+	r3 := make([]C, size)
+	r4 := make([]D, size)
+	r5 := make([]E, size)
+	r6 := make([]F, size)
+	r7 := make([]G, size)
+
+	for i, t := range tuples {
+		r1[i] = t.FieldA
+		r2[i] = t.FieldB
+		r3[i] = t.FieldC
+		r4[i] = t.FieldD
+		r5[i] = t.FieldE
+		r6[i] = t.FieldF
+		r7[i] = t.FieldG
+	}
+
+	return r1, r2, r3, r4, r5, r6, r7
+}
+
+// Tuple8 represents a 8 elemnets tuple
+type Tuple8[A any, B any, C any, D any, E any, F any, G any, H any] struct {
+	FieldA A
+	FieldB B
+	FieldC C
+	FieldD D
+	FieldE E
+	FieldF F
+	FieldG G
+	FieldH H
+}
+
+// Unbox returns values in tuple.
+// Play: todo
+func (t Tuple8[A, B, C, D, E, F, G, H]) Unbox() (A, B, C, D, E, F, G, H) {
+	return t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF, t.FieldG, t.FieldH
+}
+
+// NewTuple8 creates a 8 elemnets tuple from a list of values.
+// Play: todo
+func NewTuple8[A any, B any, C any, D any, E any, F any, G any, H any](a A, b B, c C, d D, e E, f F, g G, h H) Tuple8[A, B, C, D, E, F, G, H] {
+	return Tuple8[A, B, C, D, E, F, G, H]{FieldA: a, FieldB: b, FieldC: c, FieldD: d, FieldE: e, FieldF: f, FieldG: g, FieldH: h}
+}
+
+// Zip8 create a slice of Tuple8, whose elements are correspond to the given slice elements.
+// Play: todo
+func Zip8[A any, B any, C any, D any, E any, F any, G any, H any](a []A, b []B, c []C, d []D, e []E, f []F, g []G, h []H) []Tuple8[A, B, C, D, E, F, G, H] {
+	size := mathutil.Max(len(a), len(b), len(c), len(d), len(e), len(f), len(g), len(h))
+
+	tuples := make([]Tuple8[A, B, C, D, E, F, G, H], size)
+
+	for i := 0; i < size; i++ {
+		v1, _ := getByIndex(a, i)
+		v2, _ := getByIndex(b, i)
+		v3, _ := getByIndex(c, i)
+		v4, _ := getByIndex(d, i)
+		v5, _ := getByIndex(e, i)
+		v6, _ := getByIndex(f, i)
+		v7, _ := getByIndex(g, i)
+		v8, _ := getByIndex(h, i)
+
+		tuples[i] = Tuple8[A, B, C, D, E, F, G, H]{
+			FieldA: v1, FieldB: v2, FieldC: v3,
+			FieldD: v4, FieldE: v5, FieldF: v6,
+			FieldG: v7, FieldH: v8}
+	}
+
+	return tuples
+}
+
+// Unzip8 creates a group of slice from a slice of Tuple8.
+// Play: todo
+func Unzip8[A any, B any, C any, D any, E any, F any, G any, H any](tuples []Tuple8[A, B, C, D, E, F, G, H]) ([]A, []B, []C, []D, []E, []F, []G, []H) {
+	size := len(tuples)
+
+	r1 := make([]A, size)
+	r2 := make([]B, size)
+	r3 := make([]C, size)
+	r4 := make([]D, size)
+	r5 := make([]E, size)
+	r6 := make([]F, size)
+	r7 := make([]G, size)
+	r8 := make([]H, size)
+
+	for i, t := range tuples {
+		r1[i] = t.FieldA
+		r2[i] = t.FieldB
+		r3[i] = t.FieldC
+		r4[i] = t.FieldD
+		r5[i] = t.FieldE
+		r6[i] = t.FieldF
+		r7[i] = t.FieldG
+		r8[i] = t.FieldH
+	}
+
+	return r1, r2, r3, r4, r5, r6, r7, r8
+}
+
+// Tuple9 represents a 9 elemnets tuple
+type Tuple9[A any, B any, C any, D any, E any, F any, G any, H any, I any] struct {
+	FieldA A
+	FieldB B
+	FieldC C
+	FieldD D
+	FieldE E
+	FieldF F
+	FieldG G
+	FieldH H
+	FieldI I
+}
+
+// Unbox returns values in tuple.
+// Play: todo
+func (t Tuple9[A, B, C, D, E, F, G, H, I]) Unbox() (A, B, C, D, E, F, G, H, I) {
+	return t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF, t.FieldG, t.FieldH, t.FieldI
+}
+
+// NewTuple9 creates a 9 elemnets tuple from a list of values.
+// Play: todo
+func NewTuple9[A any, B any, C any, D any, E any, F any, G any, H any, I any](a A, b B, c C, d D, e E, f F, g G, h H, i I) Tuple9[A, B, C, D, E, F, G, H, I] {
+	return Tuple9[A, B, C, D, E, F, G, H, I]{FieldA: a, FieldB: b, FieldC: c, FieldD: d, FieldE: e, FieldF: f, FieldG: g, FieldH: h, FieldI: i}
+}
+
+// Zip9 create a slice of Tuple9, whose elements are correspond to the given slice elements.
+// Play: todo
+func Zip9[A any, B any, C any, D any, E any, F any, G any, H any, I any](a []A, b []B, c []C, d []D, e []E, f []F, g []G, h []H, i []I) []Tuple9[A, B, C, D, E, F, G, H, I] {
+	size := mathutil.Max(len(a), len(b), len(c), len(d), len(e), len(f), len(g), len(h), len(i))
+
+	tuples := make([]Tuple9[A, B, C, D, E, F, G, H, I], size)
+
+	for idx := 0; idx < size; idx++ {
+		v1, _ := getByIndex(a, idx)
+		v2, _ := getByIndex(b, idx)
+		v3, _ := getByIndex(c, idx)
+		v4, _ := getByIndex(d, idx)
+		v5, _ := getByIndex(e, idx)
+		v6, _ := getByIndex(f, idx)
+		v7, _ := getByIndex(g, idx)
+		v8, _ := getByIndex(h, idx)
+		v9, _ := getByIndex(i, idx)
+
+		tuples[idx] = Tuple9[A, B, C, D, E, F, G, H, I]{
+			FieldA: v1, FieldB: v2, FieldC: v3,
+			FieldD: v4, FieldE: v5, FieldF: v6,
+			FieldG: v7, FieldH: v8, FieldI: v9}
+	}
+
+	return tuples
+}
+
+// Unzip9 creates a group of slice from a slice of Tuple9.
+// Play: todo
+func Unzip9[A any, B any, C any, D any, E any, F any, G any, H any, I any](tuples []Tuple9[A, B, C, D, E, F, G, H, I]) ([]A, []B, []C, []D, []E, []F, []G, []H, []I) {
+	size := len(tuples)
+
+	r1 := make([]A, size)
+	r2 := make([]B, size)
+	r3 := make([]C, size)
+	r4 := make([]D, size)
+	r5 := make([]E, size)
+	r6 := make([]F, size)
+	r7 := make([]G, size)
+	r8 := make([]H, size)
+	r9 := make([]I, size)
+
+	for i, t := range tuples {
+		r1[i] = t.FieldA
+		r2[i] = t.FieldB
+		r3[i] = t.FieldC
+		r4[i] = t.FieldD
+		r5[i] = t.FieldE
+		r6[i] = t.FieldF
+		r7[i] = t.FieldG
+		r8[i] = t.FieldH
+		r9[i] = t.FieldI
+	}
+
+	return r1, r2, r3, r4, r5, r6, r7, r8, r9
+}
+
+// Tuple10 represents a 10 elemnets tuple
+type Tuple10[A any, B any, C any, D any, E any, F any, G any, H any, I any, J any] struct {
+	FieldA A
+	FieldB B
+	FieldC C
+	FieldD D
+	FieldE E
+	FieldF F
+	FieldG G
+	FieldH H
+	FieldI I
+	FieldJ J
+}
+
+// Unbox returns values in tuple.
+// Play: todo
+func (t Tuple10[A, B, C, D, E, F, G, H, I, J]) Unbox() (A, B, C, D, E, F, G, H, I, J) {
+	return t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF, t.FieldG, t.FieldH, t.FieldI, t.FieldJ
+}
+
+// NewTuple10 creates a 10 elemnets tuple from a list of values.
+// Play: todo
+func NewTuple10[A any, B any, C any, D any, E any, F any, G any, H any, I any, J any](a A, b B, c C, d D, e E, f F, g G, h H, i I, j J) Tuple10[A, B, C, D, E, F, G, H, I, J] {
+	return Tuple10[A, B, C, D, E, F, G, H, I, J]{FieldA: a, FieldB: b, FieldC: c, FieldD: d, FieldE: e, FieldF: f, FieldG: g, FieldH: h, FieldI: i, FieldJ: j}
+}
+
+// Zip10 create a slice of Tuple10, whose elements are correspond to the given slice elements.
+// Play: todo
+func Zip10[A any, B any, C any, D any, E any, F any, G any, H any, I any, J any](a []A, b []B, c []C, d []D, e []E, f []F, g []G, h []H, i []I, j []J) []Tuple10[A, B, C, D, E, F, G, H, I, J] {
+	size := mathutil.Max(len(a), len(b), len(c), len(d), len(e), len(f), len(g), len(h), len(i), len(j))
+
+	tuples := make([]Tuple10[A, B, C, D, E, F, G, H, I, J], size)
+
+	for idx := 0; idx < size; idx++ {
+		v1, _ := getByIndex(a, idx)
+		v2, _ := getByIndex(b, idx)
+		v3, _ := getByIndex(c, idx)
+		v4, _ := getByIndex(d, idx)
+		v5, _ := getByIndex(e, idx)
+		v6, _ := getByIndex(f, idx)
+		v7, _ := getByIndex(g, idx)
+		v8, _ := getByIndex(h, idx)
+		v9, _ := getByIndex(i, idx)
+		v10, _ := getByIndex(j, idx)
+
+		tuples[idx] = Tuple10[A, B, C, D, E, F, G, H, I, J]{
+			FieldA: v1, FieldB: v2, FieldC: v3,
+			FieldD: v4, FieldE: v5, FieldF: v6,
+			FieldG: v7, FieldH: v8, FieldI: v9,
+			FieldJ: v10}
+	}
+
+	return tuples
+}
+
+// Unzip10 creates a group of slice from a slice of Tuple10.
+// Play: todo
+func Unzip10[A any, B any, C any, D any, E any, F any, G any, H any, I any, J any](tuples []Tuple10[A, B, C, D, E, F, G, H, I, J]) ([]A, []B, []C, []D, []E, []F, []G, []H, []I, []J) {
+	size := len(tuples)
+
+	r1 := make([]A, size)
+	r2 := make([]B, size)
+	r3 := make([]C, size)
+	r4 := make([]D, size)
+	r5 := make([]E, size)
+	r6 := make([]F, size)
+	r7 := make([]G, size)
+	r8 := make([]H, size)
+	r9 := make([]I, size)
+	r10 := make([]J, size)
+
+	for i, t := range tuples {
+		r1[i] = t.FieldA
+		r2[i] = t.FieldB
+		r3[i] = t.FieldC
+		r4[i] = t.FieldD
+		r5[i] = t.FieldE
+		r6[i] = t.FieldF
+		r7[i] = t.FieldG
+		r8[i] = t.FieldH
+		r9[i] = t.FieldI
+		r10[i] = t.FieldJ
+	}
+
+	return r1, r2, r3, r4, r5, r6, r7, r8, r9, r10
+}
+
+func getByIndex[T any](slice []T, index int) (T, bool) {
+	l := len(slice)
+	if index >= l || -index > l {
+		var zeroVal T
+		return zeroVal, false
+	}
+
+	if index >= 0 {
+		return slice[index], true
+	}
+
+	return slice[l+index], true
+}
--- a/tuple/tuple_example_test.go
+++ b/tuple/tuple_example_test.go
@@ -0,0 +1,301 @@
+// Copyright 2023 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package tuple implements tuple data type and some operations on it.
+package tuple
+
+import (
+	"fmt"
+)
+
+func ExampleNewTuple2() {
+	t := NewTuple2(1, 0.1)
+	fmt.Printf("%v %v", t.FieldA, t.FieldB)
+
+	// Output: 1 0.1
+}
+
+func ExampleTuple2_Unbox() {
+	t := NewTuple2(1, 0.1)
+	v1, v2 := t.Unbox()
+	fmt.Printf("%v %v", v1, v2)
+
+	// Output: 1 0.1
+}
+
+func ExampleZip2() {
+	result := Zip2([]int{1}, []float64{0.1})
+	fmt.Println(result)
+
+	// Output: [{1 0.1}]
+}
+
+func ExampleUnzip2() {
+	v1, v2 := Unzip2([]Tuple2[int, float64]{{FieldA: 1, FieldB: 0.1}})
+
+	fmt.Printf("%v %v", v1, v2)
+
+	// Output: [1] [0.1]
+}
+
+func ExampleNewTuple3() {
+	t := NewTuple3(1, 0.1, "a")
+	fmt.Printf("%v %v %v", t.FieldA, t.FieldB, t.FieldC)
+
+	// Output: 1 0.1 a
+}
+
+func ExampleTuple3_Unbox() {
+	t := NewTuple3(1, 0.1, "a")
+	v1, v2, v3 := t.Unbox()
+	fmt.Printf("%v %v %v", v1, v2, v3)
+
+	// Output: 1 0.1 a
+}
+
+func ExampleZip3() {
+	result := Zip3([]int{1}, []float64{0.1}, []string{"a"})
+	fmt.Println(result)
+
+	// Output: [{1 0.1 a}]
+}
+
+func ExampleUnzip3() {
+	v1, v2, v3 := Unzip3([]Tuple3[int, float64, string]{
+		{FieldA: 1, FieldB: 0.1, FieldC: "a"},
+	})
+
+	fmt.Printf("%v %v %v", v1, v2, v3)
+
+	// Output: [1] [0.1] [a]
+}
+
+func ExampleNewTuple4() {
+	t := NewTuple4(1, 0.1, "a", true)
+	fmt.Printf("%v %v %v %v", t.FieldA, t.FieldB, t.FieldC, t.FieldD)
+
+	// Output: 1 0.1 a true
+}
+
+func ExampleTuple4_Unbox() {
+	t := NewTuple4(1, 0.1, "a", true)
+	v1, v2, v3, v4 := t.Unbox()
+	fmt.Printf("%v %v %v %v", v1, v2, v3, v4)
+
+	// Output: 1 0.1 a true
+}
+
+func ExampleZip4() {
+	result := Zip4([]int{1}, []float64{0.1}, []string{"a"}, []bool{true})
+	fmt.Println(result)
+
+	// Output: [{1 0.1 a true}]
+}
+
+func ExampleUnzip4() {
+	v1, v2, v3, v4 := Unzip4([]Tuple4[int, float64, string, bool]{
+		{FieldA: 1, FieldB: 0.1, FieldC: "a", FieldD: true},
+	})
+
+	fmt.Printf("%v %v %v %v", v1, v2, v3, v4)
+
+	// Output: [1] [0.1] [a] [true]
+}
+
+func ExampleNewTuple5() {
+	t := NewTuple5(1, 0.1, "a", true, 2)
+	fmt.Printf("%v %v %v %v %v", t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE)
+
+	// Output: 1 0.1 a true 2
+}
+
+func ExampleTuple5_Unbox() {
+	t := NewTuple5(1, 0.1, "a", true, 2)
+	v1, v2, v3, v4, v5 := t.Unbox()
+	fmt.Printf("%v %v %v %v %v", v1, v2, v3, v4, v5)
+
+	// Output: 1 0.1 a true 2
+}
+
+func ExampleZip5() {
+	result := Zip5([]int{1}, []float64{0.1}, []string{"a"}, []bool{true}, []int{2})
+	fmt.Println(result)
+
+	// Output: [{1 0.1 a true 2}]
+}
+
+func ExampleUnzip5() {
+	v1, v2, v3, v4, v5 := Unzip5([]Tuple5[int, float64, string, bool, int]{
+		{FieldA: 1, FieldB: 0.1, FieldC: "a", FieldD: true, FieldE: 2},
+	})
+
+	fmt.Printf("%v %v %v %v %v", v1, v2, v3, v4, v5)
+
+	// Output: [1] [0.1] [a] [true] [2]
+}
+
+func ExampleNewTuple6() {
+	t := NewTuple6(1, 0.1, "a", true, 2, 2.2)
+	fmt.Printf("%v %v %v %v %v %v", t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF)
+
+	// Output: 1 0.1 a true 2 2.2
+}
+
+func ExampleTuple6_Unbox() {
+	t := NewTuple6(1, 0.1, "a", true, 2, 2.2)
+	v1, v2, v3, v4, v5, v6 := t.Unbox()
+	fmt.Printf("%v %v %v %v %v %v", v1, v2, v3, v4, v5, v6)
+
+	// Output: 1 0.1 a true 2 2.2
+}
+
+func ExampleZip6() {
+	result := Zip6([]int{1}, []float64{0.1}, []string{"a"}, []bool{true}, []int{2}, []float32{2.2})
+	fmt.Println(result)
+
+	// Output: [{1 0.1 a true 2 2.2}]
+}
+
+func ExampleUnzip6() {
+	v1, v2, v3, v4, v5, v6 := Unzip6([]Tuple6[int, float64, string, bool, int, float32]{
+		{FieldA: 1, FieldB: 0.1, FieldC: "a", FieldD: true, FieldE: 2, FieldF: 2.2},
+	})
+
+	fmt.Printf("%v %v %v %v %v %v", v1, v2, v3, v4, v5, v6)
+
+	// Output: [1] [0.1] [a] [true] [2] [2.2]
+}
+
+func ExampleNewTuple7() {
+	t := NewTuple7(1, 0.1, "a", true, 2, 2.2, "b")
+	fmt.Printf("%v %v %v %v %v %v %v", t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF, t.FieldG)
+
+	// Output: 1 0.1 a true 2 2.2 b
+}
+
+func ExampleTuple7_Unbox() {
+	t := NewTuple7(1, 0.1, "a", true, 2, 2.2, "b")
+	v1, v2, v3, v4, v5, v6, v7 := t.Unbox()
+	fmt.Printf("%v %v %v %v %v %v %v", v1, v2, v3, v4, v5, v6, v7)
+
+	// Output: 1 0.1 a true 2 2.2 b
+}
+
+func ExampleZip7() {
+	result := Zip7([]int{1}, []float64{0.1}, []string{"a"}, []bool{true}, []int{2}, []float32{2.2}, []string{"b"})
+	fmt.Println(result)
+
+	// Output: [{1 0.1 a true 2 2.2 b}]
+}
+
+func ExampleUnzip7() {
+	v1, v2, v3, v4, v5, v6, v7 := Unzip7([]Tuple7[int, float64, string, bool, int, float32, string]{
+		{FieldA: 1, FieldB: 0.1, FieldC: "a", FieldD: true, FieldE: 2, FieldF: 2.2, FieldG: "b"},
+	})
+
+	fmt.Printf("%v %v %v %v %v %v %v", v1, v2, v3, v4, v5, v6, v7)
+
+	// Output: [1] [0.1] [a] [true] [2] [2.2] [b]
+}
+
+func ExampleNewTuple8() {
+	t := NewTuple8(1, 0.1, "a", true, 2, 2.2, "b", "c")
+	fmt.Printf("%v %v %v %v %v %v %v %v", t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF, t.FieldG, t.FieldH)
+
+	// Output: 1 0.1 a true 2 2.2 b c
+}
+
+func ExampleTuple8_Unbox() {
+	t := NewTuple8(1, 0.1, "a", true, 2, 2.2, "b", "c")
+	v1, v2, v3, v4, v5, v6, v7, v8 := t.Unbox()
+	fmt.Printf("%v %v %v %v %v %v %v %v", v1, v2, v3, v4, v5, v6, v7, v8)
+
+	// Output: 1 0.1 a true 2 2.2 b c
+}
+
+func ExampleZip8() {
+	result := Zip8([]int{1}, []float64{0.1}, []string{"a"}, []bool{true}, []int{2}, []float32{2.2}, []string{"b"}, []string{"c"})
+	fmt.Println(result)
+
+	// Output: [{1 0.1 a true 2 2.2 b c}]
+}
+
+func ExampleUnzip8() {
+	v1, v2, v3, v4, v5, v6, v7, v8 := Unzip8([]Tuple8[int, float64, string, bool, int, float32, string, string]{
+		{FieldA: 1, FieldB: 0.1, FieldC: "a", FieldD: true, FieldE: 2, FieldF: 2.2, FieldG: "b", FieldH: "c"},
+	})
+
+	fmt.Printf("%v %v %v %v %v %v %v %v", v1, v2, v3, v4, v5, v6, v7, v8)
+
+	// Output: [1] [0.1] [a] [true] [2] [2.2] [b] [c]
+}
+
+func ExampleNewTuple9() {
+	t := NewTuple9(1, 0.1, "a", true, 2, 2.2, "b", "c", map[string]int{"a": 1})
+	fmt.Printf("%v %v %v %v %v %v %v %v %v", t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF, t.FieldG, t.FieldH, t.FieldI)
+
+	// Output: 1 0.1 a true 2 2.2 b c map[a:1]
+}
+
+func ExampleTuple9_Unbox() {
+	t := NewTuple9(1, 0.1, "a", true, 2, 2.2, "b", "c", map[string]int{"a": 1})
+	v1, v2, v3, v4, v5, v6, v7, v8, v9 := t.Unbox()
+	fmt.Printf("%v %v %v %v %v %v %v %v %v", v1, v2, v3, v4, v5, v6, v7, v8, v9)
+
+	// Output: 1 0.1 a true 2 2.2 b c map[a:1]
+}
+
+func ExampleZip9() {
+	result := Zip9([]int{1}, []float64{0.1}, []string{"a"}, []bool{true}, []int{2}, []float32{2.2}, []string{"b"}, []string{"c"}, []int64{3})
+	fmt.Println(result)
+
+	// Output: [{1 0.1 a true 2 2.2 b c 3}]
+}
+
+func ExampleUnzip9() {
+	v1, v2, v3, v4, v5, v6, v7, v8, v9 := Unzip9([]Tuple9[int, float64, string, bool, int, float32, string, string, int64]{
+		{FieldA: 1, FieldB: 0.1, FieldC: "a", FieldD: true, FieldE: 2, FieldF: 2.2, FieldG: "b", FieldH: "c", FieldI: 3},
+	})
+
+	fmt.Printf("%v %v %v %v %v %v %v %v %v", v1, v2, v3, v4, v5, v6, v7, v8, v9)
+
+	// Output: [1] [0.1] [a] [true] [2] [2.2] [b] [c] [3]
+}
+
+func ExampleNewTuple10() {
+	type foo struct {
+		A string
+	}
+	t := NewTuple10(1, 0.1, "a", true, 2, 2.2, "b", "c", map[string]int{"a": 1}, foo{A: "a"})
+	fmt.Printf("%v %v %v %v %v %v %v %v %v %v", t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF, t.FieldG, t.FieldH, t.FieldI, t.FieldJ)
+
+	// Output: 1 0.1 a true 2 2.2 b c map[a:1] {a}
+}
+
+func ExampleTuple10_Unbox() {
+	type foo struct {
+		A string
+	}
+	t := NewTuple10(1, 0.1, "a", true, 2, 2.2, "b", "c", map[string]int{"a": 1}, foo{A: "a"})
+	v1, v2, v3, v4, v5, v6, v7, v8, v9, v10 := t.Unbox()
+	fmt.Printf("%v %v %v %v %v %v %v %v %v %v", v1, v2, v3, v4, v5, v6, v7, v8, v9, v10)
+
+	// Output: 1 0.1 a true 2 2.2 b c map[a:1] {a}
+}
+
+func ExampleZip10() {
+	result := Zip10([]int{1}, []float64{0.1}, []string{"a"}, []bool{true}, []int{2}, []float32{2.2}, []string{"b"}, []string{"c"}, []int64{3}, []bool{false})
+	fmt.Println(result)
+
+	// Output: [{1 0.1 a true 2 2.2 b c 3 false}]
+}
+
+func ExampleUnzip10() {
+	v1, v2, v3, v4, v5, v6, v7, v8, v9, v10 := Unzip10([]Tuple10[int, float64, string, bool, int, float32, string, string, int64, bool]{
+		{FieldA: 1, FieldB: 0.1, FieldC: "a", FieldD: true, FieldE: 2, FieldF: 2.2, FieldG: "b", FieldH: "c", FieldI: 3, FieldJ: false},
+	})
+
+	fmt.Printf("%v %v %v %v %v %v %v %v %v %v", v1, v2, v3, v4, v5, v6, v7, v8, v9, v10)
+
+	// Output: [1] [0.1] [a] [true] [2] [2.2] [b] [c] [3] [false]
+}
--- a/tuple/tuple_test.go
+++ b/tuple/tuple_test.go
@@ -0,0 +1,195 @@
+// Copyright 2023 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package tuple implements tuple data type and some operations on it.
+package tuple
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestTuples(t *testing.T) {
+	t.Parallel()
+	assert := internal.NewAssert(t, "TestTuples")
+
+	type foo struct {
+		A string
+	}
+
+	t2 := NewTuple2[int, float64](1, 0.1)
+	t3 := NewTuple3[int, float64, string](1, 0.1, "a")
+	t4 := NewTuple4[int, float64, string, bool](1, 0.1, "a", true)
+	t5 := NewTuple5[int, float64, string, bool, int64](1, 0.1, "a", true, 2)
+	t6 := NewTuple6[int, float64, string, bool, int64, float32](1, 0.1, "a", true, 2, 2.2)
+	t7 := NewTuple7[int, float64, string, bool, int64, float32, string](1, 0.1, "a", true, 2, 2.2, "b")
+	t8 := NewTuple8[int, float64, string, bool, int64, float32, string, string](1, 0.1, "a", true, 2, 2.2, "b", "c")
+	t9 := NewTuple9[int, float64, string, bool, int64, float32, string, string, map[string]int](1, 0.1, "a", true, 2, 2.2, "b", "c", map[string]int{"a": 1})
+	t10 := NewTuple10[int, float64, string, bool, int64, float32, string, string, map[string]int, foo](1, 0.1, "a", true, 2, 2.2, "b", "c", map[string]int{"a": 1}, foo{A: "a"})
+
+	assert.Equal(t2, Tuple2[int, float64]{FieldA: 1, FieldB: 0.1})
+	assert.Equal(t3, Tuple3[int, float64, string]{FieldA: 1, FieldB: 0.1, FieldC: "a"})
+	assert.Equal(t4, Tuple4[int, float64, string, bool]{FieldA: 1, FieldB: 0.1, FieldC: "a", FieldD: true})
+	assert.Equal(t5, Tuple5[int, float64, string, bool, int64]{FieldA: 1, FieldB: 0.1, FieldC: "a", FieldD: true, FieldE: 2})
+	assert.Equal(t6, Tuple6[int, float64, string, bool, int64, float32]{FieldA: 1, FieldB: 0.1, FieldC: "a", FieldD: true, FieldE: 2, FieldF: 2.2})
+	assert.Equal(t7, Tuple7[int, float64, string, bool, int64, float32, string]{FieldA: 1, FieldB: 0.1, FieldC: "a", FieldD: true, FieldE: 2, FieldF: 2.2, FieldG: "b"})
+	assert.Equal(t8, Tuple8[int, float64, string, bool, int64, float32, string, string]{FieldA: 1, FieldB: 0.1, FieldC: "a", FieldD: true, FieldE: 2, FieldF: 2.2, FieldG: "b", FieldH: "c"})
+	assert.Equal(t9, Tuple9[int, float64, string, bool, int64, float32, string, string, map[string]int]{FieldA: 1, FieldB: 0.1, FieldC: "a", FieldD: true, FieldE: 2, FieldF: 2.2, FieldG: "b", FieldH: "c", FieldI: map[string]int{"a": 1}})
+	assert.Equal(t10, Tuple10[int, float64, string, bool, int64, float32, string, string, map[string]int, foo]{FieldA: 1, FieldB: 0.1, FieldC: "a", FieldD: true, FieldE: 2, FieldF: 2.2, FieldG: "b", FieldH: "c", FieldI: map[string]int{"a": 1}, FieldJ: foo{A: "a"}})
+}
+
+func TestTuple_Unbox(t *testing.T) {
+	t.Parallel()
+	assert := internal.NewAssert(t, "TestTuple_Unbox")
+
+	type foo struct {
+		A string
+	}
+
+	t2 := NewTuple2[int, float64](1, 0.1)
+	v1, v2 := t2.Unbox()
+	assert.Equal(1, v1)
+	assert.Equal(0.1, v2)
+
+	t3 := NewTuple3[int, float64, string](1, 0.1, "a")
+	v1, v2, v3 := t3.Unbox()
+	assert.Equal(1, v1)
+	assert.Equal(0.1, v2)
+	assert.Equal("a", v3)
+
+	t4 := NewTuple4[int, float64, string, bool](1, 0.1, "a", true)
+	v1, v2, v3, v4 := t4.Unbox()
+	assert.Equal(1, v1)
+	assert.Equal(0.1, v2)
+	assert.Equal("a", v3)
+	assert.Equal(true, v4)
+
+	t5 := NewTuple5[int, float64, string, bool, int64](1, 0.1, "a", true, 2)
+	v1, v2, v3, v4, v5 := t5.Unbox()
+	assert.Equal(1, v1)
+	assert.Equal(0.1, v2)
+	assert.Equal("a", v3)
+	assert.Equal(true, v4)
+	assert.Equal(int64(2), v5)
+
+	t6 := NewTuple6[int, float64, string, bool, int64, float32](1, 0.1, "a", true, 2, 2.2)
+	v1, v2, v3, v4, v5, v6 := t6.Unbox()
+	assert.Equal(1, v1)
+	assert.Equal(0.1, v2)
+	assert.Equal("a", v3)
+	assert.Equal(true, v4)
+	assert.Equal(int64(2), v5)
+	assert.Equal(float32(2.2), v6)
+
+	t7 := NewTuple7[int, float64, string, bool, int64, float32, string](1, 0.1, "a", true, 2, 2.2, "b")
+	v1, v2, v3, v4, v5, v6, v7 := t7.Unbox()
+	assert.Equal(1, v1)
+	assert.Equal(0.1, v2)
+	assert.Equal("a", v3)
+	assert.Equal(true, v4)
+	assert.Equal(int64(2), v5)
+	assert.Equal(float32(2.2), v6)
+	assert.Equal("b", v7)
+
+	t8 := NewTuple8[int, float64, string, bool, int64, float32, string, string](1, 0.1, "a", true, 2, 2.2, "b", "c")
+	v1, v2, v3, v4, v5, v6, v7, v8 := t8.Unbox()
+	assert.Equal(1, v1)
+	assert.Equal(0.1, v2)
+	assert.Equal("a", v3)
+	assert.Equal(true, v4)
+	assert.Equal(int64(2), v5)
+	assert.Equal(float32(2.2), v6)
+	assert.Equal("b", v7)
+	assert.Equal("c", v8)
+
+	t9 := NewTuple9[int, float64, string, bool, int64, float32, string, string, map[string]int](1, 0.1, "a", true, 2, 2.2, "b", "c", map[string]int{"a": 1})
+	v1, v2, v3, v4, v5, v6, v7, v8, v9 := t9.Unbox()
+	assert.Equal(1, v1)
+	assert.Equal(0.1, v2)
+	assert.Equal("a", v3)
+	assert.Equal(true, v4)
+	assert.Equal(int64(2), v5)
+	assert.Equal(float32(2.2), v6)
+	assert.Equal("b", v7)
+	assert.Equal("c", v8)
+	assert.Equal(map[string]int{"a": 1}, v9)
+
+	t10 := NewTuple10[int, float64, string, bool, int64, float32, string, string, map[string]int, foo](1, 0.1, "a", true, 2, 2.2, "b", "c", map[string]int{"a": 1}, foo{A: "a"})
+	v1, v2, v3, v4, v5, v6, v7, v8, v9, v10 := t10.Unbox()
+	assert.Equal(1, v1)
+	assert.Equal(0.1, v2)
+	assert.Equal("a", v3)
+	assert.Equal(true, v4)
+	assert.Equal(int64(2), v5)
+	assert.Equal(float32(2.2), v6)
+	assert.Equal("b", v7)
+	assert.Equal("c", v8)
+	assert.Equal(map[string]int{"a": 1}, v9)
+	assert.Equal(foo{A: "a"}, v10)
+}
+
+func TestZip(t *testing.T) {
+	t.Parallel()
+	assert := internal.NewAssert(t, "TestZip")
+
+	r2 := Zip2(
+		[]int{1, 2},
+		[]string{"a", "b"},
+	)
+	assert.Equal(r2, []Tuple2[int, string]{
+		{FieldA: 1, FieldB: "a"},
+		{FieldA: 2, FieldB: "b"},
+	})
+
+	r3 := Zip3(
+		[]int{1, 2, 3},
+		[]string{"a", "b", "c"},
+		[]float64{0.1, 0.2, 0.3},
+	)
+	assert.Equal(r3, []Tuple3[int, string, float64]{
+		{FieldA: 1, FieldB: "a", FieldC: 0.1},
+		{FieldA: 2, FieldB: "b", FieldC: 0.2},
+		{FieldA: 3, FieldB: "c", FieldC: 0.3},
+	})
+
+	r4 := Zip4(
+		[]int{1, 2, 3, 4},
+		[]string{"a", "b", "c", "d"},
+		[]float64{0.1, 0.2, 0.3, 0.4},
+		[]bool{true, true, true, true},
+	)
+	assert.Equal(r4, []Tuple4[int, string, float64, bool]{
+		{FieldA: 1, FieldB: "a", FieldC: 0.1, FieldD: true},
+		{FieldA: 2, FieldB: "b", FieldC: 0.2, FieldD: true},
+		{FieldA: 3, FieldB: "c", FieldC: 0.3, FieldD: true},
+		{FieldA: 4, FieldB: "d", FieldC: 0.4, FieldD: true},
+	})
+
+	r5 := Zip5(
+		[]int{1, 2, 3, 4, 5},
+		[]string{"a", "b", "c", "d", "e"},
+		[]float64{0.1, 0.2, 0.3, 0.4, 0.5},
+		[]bool{true, true, true, true, true},
+		[]int{6, 7, 8, 9, 10},
+	)
+	assert.Equal(r5, []Tuple5[int, string, float64, bool, int]{
+		{FieldA: 1, FieldB: "a", FieldC: 0.1, FieldD: true, FieldE: 6},
+		{FieldA: 2, FieldB: "b", FieldC: 0.2, FieldD: true, FieldE: 7},
+		{FieldA: 3, FieldB: "c", FieldC: 0.3, FieldD: true, FieldE: 8},
+		{FieldA: 4, FieldB: "d", FieldC: 0.4, FieldD: true, FieldE: 9},
+		{FieldA: 5, FieldB: "e", FieldC: 0.5, FieldD: true, FieldE: 10},
+	})
+
+}
+
+func TestUnzip(t *testing.T) {
+	t.Parallel()
+	assert := internal.NewAssert(t, "TestUnzip")
+
+	r1, r2, r3 := Unzip3([]Tuple3[string, int, float64]{{FieldA: "a", FieldB: 1, FieldC: 0.1}, {FieldA: "b", FieldB: 2, FieldC: 0.2}})
+
+	assert.Equal(r1, []string{"a", "b"})
+	assert.Equal(r2, []int{1, 2})
+	assert.Equal(r3, []float64{0.1, 0.2})
+}
--- a/validator/validator_test.go
+++ b/validator/validator_test.go
@@ -11,6 +11,8 @@ import (
 )

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

 	assert.Equal(true, IsAllUpper("ABC"))
@@ -26,6 +28,8 @@ func TestIsAllUpper(t *testing.T) {
 }

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

 	assert.Equal(true, IsAllLower("abc"))
@@ -41,6 +45,8 @@ func TestIsAllLower(t *testing.T) {
 }

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

 	assert.Equal(true, ContainLower("abc"))
@@ -57,6 +63,8 @@ func TestContainLower(t *testing.T) {
 }

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

 	assert.Equal(true, ContainUpper("ABC"))
@@ -73,6 +81,8 @@ func TestContainUpper(t *testing.T) {
 }

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

 	assert.Equal(true, ContainLetter("ABC"))
@@ -87,6 +97,8 @@ func TestContainLetter(t *testing.T) {
 }

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

 	assert.Equal(true, ContainNumber("123"))
@@ -104,6 +116,8 @@ func TestContainNumber(t *testing.T) {
 }

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

 	assert.Equal(true, IsJSON("{}"))
@@ -118,6 +132,8 @@ func TestIsJSON(t *testing.T) {
 }

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

 	assert.Equal(false, IsNumber(""))
@@ -127,6 +143,8 @@ func TestIsNumber(t *testing.T) {
 }

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

 	assert.Equal(false, IsFloat(""))
@@ -136,6 +154,8 @@ func TestIsFloat(t *testing.T) {
 }

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

 	assert.Equal(false, IsInt(""))
@@ -146,6 +166,8 @@ func TestIsInt(t *testing.T) {
 }

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

 	assert.Equal(true, IsNumberStr("3."))
@@ -156,6 +178,8 @@ func TestIsNumberStr(t *testing.T) {
 }

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

 	assert.Equal(true, IsFloatStr("3."))
@@ -166,6 +190,8 @@ func TestIsFloatStr(t *testing.T) {
 }

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

 	assert.Equal(true, IsIntStr("+3"))
@@ -175,6 +201,8 @@ func TestIsIntStr(t *testing.T) {
 }

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

 	assert.Equal(true, IsPort("1"))
@@ -187,6 +215,8 @@ func TestIsPort(t *testing.T) {
 }

 func TestIsIp(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestIsIntStr")

 	assert.Equal(true, IsIp("127.0.0.1"))
@@ -196,6 +226,8 @@ func TestIsIp(t *testing.T) {
 }

 func TestIsIpV4(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestIsIpV4")

 	assert.Equal(true, IsIpV4("127.0.0.1"))
@@ -203,6 +235,8 @@ func TestIsIpV4(t *testing.T) {
 }

 func TestIsIpV6(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestIsIpV6")

 	assert.Equal(false, IsIpV6("127.0.0.1"))
@@ -210,6 +244,8 @@ func TestIsIpV6(t *testing.T) {
 }

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

 	assert.Equal(true, IsUrl("http://abc.com"))
@@ -219,6 +255,8 @@ func TestIsUrl(t *testing.T) {
 }

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

 	assert.Equal(true, IsDns("abc.com"))
@@ -227,6 +265,8 @@ func TestIsDns(t *testing.T) {
 }

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

 	assert.Equal(true, IsEmail("abc@xyz.com"))
@@ -234,6 +274,8 @@ func TestIsEmail(t *testing.T) {
 }

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

 	assert.Equal(true, ContainChinese("你好"))
@@ -242,6 +284,8 @@ func TestContainChinese(t *testing.T) {
 }

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

 	assert.Equal(true, IsChineseMobile("13263527980"))
@@ -249,6 +293,8 @@ func TestIsChineseMobile(t *testing.T) {
 }

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

 	assert.Equal(true, IsChinesePhone("010-32116675"))
@@ -259,6 +305,8 @@ func TestIsChinesePhone(t *testing.T) {
 }

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

 	assert.Equal(true, IsChineseIdNum("210911192105130715"))
@@ -268,6 +316,8 @@ func TestIsChineseIdNum(t *testing.T) {
 }

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

 	assert.Equal(true, IsCreditCard("4111111111111111"))
@@ -275,6 +325,8 @@ func TestIsCreditCard(t *testing.T) {
 }

 func TestIsBase64(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestIsBase64")

 	assert.Equal(true, IsBase64("aGVsbG8="))
@@ -282,6 +334,8 @@ func TestIsBase64(t *testing.T) {
 }

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

 	assert.Equal(true, IsEmptyString(""))
@@ -291,6 +345,8 @@ func TestIsEmptyString(t *testing.T) {
 }

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

 	assert.Equal(true, IsAlpha("abc"))
@@ -301,6 +357,8 @@ func TestIsAlpha(t *testing.T) {
 }

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

 	assert.Equal(true, IsRegexMatch("abc", `^[a-zA-Z]+$`))
@@ -309,6 +367,8 @@ func TestIsRegexMatch(t *testing.T) {
 }

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

 	assert.Equal(false, IsStrongPassword("abc", 3))
@@ -321,6 +381,8 @@ func TestIsStrongPassword(t *testing.T) {
 }

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

 	assert.Equal(true, IsWeakPassword("abc"))
@@ -331,6 +393,8 @@ func TestIsWeakPassword(t *testing.T) {
 }

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

 	var (
@@ -438,6 +502,8 @@ func TestIsZeroValue(t *testing.T) {
 }

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

 	str := "你好"
@@ -448,6 +514,8 @@ func TestIsGBK(t *testing.T) {
 }

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

 	assert.Equal(true, IsASCII("ABC"))
@@ -458,6 +526,8 @@ func TestIsASCII(t *testing.T) {
 }

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

 	assert.Equal(true, IsPrintable("ABC"))
--- a/xerror/xerror_test.go
+++ b/xerror/xerror_test.go
@@ -10,11 +10,15 @@ import (
 )

 func TestTryUnwrap(t *testing.T) {
+	t.Parallel()
+
 	assert := internal.NewAssert(t, "TestTryUnwrap")
 	assert.Equal(42, TryUnwrap(strconv.Atoi("42")))
 }

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

 	_, err := strconv.Atoi("4o2")
@@ -27,6 +31,8 @@ func TestTryUnwrapFail(t *testing.T) {
 }

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

 	err := New("error occurs")
@@ -34,6 +40,8 @@ func TestNew(t *testing.T) {
 }

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

 	err := New("wrong password")
@@ -43,6 +51,8 @@ func TestWrap(t *testing.T) {
 }

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

 	err1 := New("error").With("level", "high")
@@ -52,6 +62,8 @@ func TestXError_Wrap(t *testing.T) {
 }

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

 	err1 := New("error").With("level", "high")
@@ -64,6 +76,8 @@ func TestXError_Unwrap(t *testing.T) {
 }

 func TestXError_StackTrace(t *testing.T) {
+	// t.Parallel()
+
 	assert := internal.NewAssert(t, "TestXError_StackTrace")

 	err := New("error")
@@ -72,11 +86,13 @@ func TestXError_StackTrace(t *testing.T) {

 	assert.Equal(3, len(stacks))
 	assert.Equal("github.com/duke-git/lancet/v2/xerror.TestXError_StackTrace", stacks[0].Func)
-	assert.Equal(69, stacks[0].Line)
+	assert.Equal(83, stacks[0].Line)
 	assert.Equal(true, strings.Contains(stacks[0].File, "xerror_test.go"))
 }

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

 	baseErr := New("baseError")
@@ -94,6 +110,8 @@ func TestXError_With_Id_Is_Values(t *testing.T) {
 }

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

 	cause := errors.New("error")
Author	SHA1	Message	Date
dudaodong	584aabdf62	release v2.2.3	2023-07-03 14:09:04 +08:00
dudaodong	1b754a6264	doc: update link in readme	2023-07-03 11:57:50 +08:00
dudaodong	06a558d797	doc: update link in readme	2023-07-03 11:21:49 +08:00
dudaodong	423779d3ff	doc: update link in readme	2023-07-03 11:14:55 +08:00
dudaodong	78c17a9e7b	doc: update link in readme	2023-07-03 10:52:26 +08:00
dudaodong	529b9317d0	doc: update link in readme	2023-07-03 10:48:04 +08:00
dudaodong	dc838f645b	doc: update link in readme	2023-07-03 10:43:05 +08:00
dudaodong	7f559c4940	doc: update link in readme	2023-07-03 10:42:22 +08:00
dudaodong	acb08dfd90	doc: update link in readme	2023-07-03 10:40:50 +08:00
dudaodong	ffe46fd06d	update readme file	2023-07-02 22:31:17 +08:00
dudaodong	b419e46b9b	doc: add package index	2023-07-02 22:12:47 +08:00
dudaodong	8fbcdfd515	doc: add pointer and tuple package to readme file	2023-07-02 21:06:10 +08:00
dudaodong	f03f48210c	doc: update system package	2023-06-30 15:12:18 +08:00
dudaodong	742944e2f0	doc: add doc for tuple package	2023-06-30 15:11:26 +08:00
dudaodong	c0b491ad78	doc: add example for tuple package	2023-06-30 11:20:46 +08:00
dudaodong	e9abae2a92	doc: add doc for pointer package	2023-06-30 10:31:22 +08:00
dudaodong	8229de2f10	test: add parallel running for all unit test functions	2023-06-30 10:18:45 +08:00
dudaodong	ab364744b6	test: add parallel running for all unit test functions	2023-06-29 14:49:28 +08:00
dudaodong	17ff84fa1f	test: add test for Tuple Zip and Unzip	2023-06-29 11:34:43 +08:00
dudaodong	bf50baa07d	feat: add GetTodayStartTime and GetTodayEndTime	2023-06-29 11:03:28 +08:00
dudaodong	7d56da8108	feat: add Md5Byte	2023-06-29 10:33:29 +08:00
dudaodong	16c2df711b	feat: add unzip for tuple	2023-06-28 20:06:02 +08:00
dudaodong	015f8c3f5c	feat: add zip	2023-06-28 19:41:46 +08:00
dudaodong	ba25701d89	feat: add zip	2023-06-28 17:52:12 +08:00
dudaodong	a0cb4bb266	doc: add example for tuple package	2023-06-28 16:25:43 +08:00
dudaodong	d6ba7497f9	feat: add Tuple package	2023-06-28 15:58:41 +08:00
dudaodong	7da931e0a0	feat: add Abs	2023-06-27 10:24:35 +08:00
dudaodong	8f49078eb3	doc: add go playground demo	2023-06-20 14:04:18 +08:00