release v2.1.14

feat: add ForEach, Reduce for stream
2026-02-12 08:42:29 +08:00 · 2023-02-06 17:42:13 +08:00 · 2023-02-06 17:40:54 +08:00 · 2023-02-06 17:38:33 +08:00 · 2023-02-06 17:24:17 +08:00 · 2023-02-06 17:08:36 +08:00
48 changed files with 6145 additions and 3925 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-2.1.13-green.svg)](https://github.com/duke-git/lancet/releases)
+[![Release](https://img.shields.io/badge/release-2.1.14-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)
--- 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-2.1.13-green.svg)](https://github.com/duke-git/lancet/releases)
+[![Release](https://img.shields.io/badge/release-2.1.14-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)
@@ -51,7 +51,7 @@ lancet 是以包的结构组织代码的，使用时需要导入相应的包名
 import "github.com/duke-git/lancet/v2/strutil"
 ```

-## 例子
+## 示例

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

--- a/datastructure/list/list.go
+++ b/datastructure/list/list.go
@@ -6,6 +6,8 @@ package datastructure

 import (
 	"reflect"
+
+	"github.com/duke-git/lancet/v2/iterator"
 )

 // List is a linear table, implemented with slice.
@@ -316,6 +318,43 @@ func (l *List[T]) Intersection(other *List[T]) *List[T] {
 	return result
 }

+// Difference returns the difference between two collections.
+// return a list whose element in the original list, not in the given list.
+func (l *List[T]) Difference(other *List[T]) *List[T] {
+	result := NewList(make([]T, 0))
+
+	intersectList := l.Intersection(other)
+
+	for _, v := range l.data {
+		if !intersectList.Contain(v) {
+			result.data = append(result.data, v)
+		}
+	}
+
+	return result
+}
+
+// SymmetricDifference oppoiste operation of intersection function.
+func (l *List[T]) SymmetricDifference(other *List[T]) *List[T] {
+	result := NewList(make([]T, 0))
+
+	intersectList := l.Intersection(other)
+
+	for _, v := range l.data {
+		if !intersectList.Contain(v) {
+			result.data = append(result.data, v)
+		}
+	}
+
+	for _, v := range other.data {
+		if !intersectList.Contain(v) {
+			result.data = append(result.data, v)
+		}
+	}
+
+	return result
+}
+
 // SubList returns a sub list of the original list between the specified fromIndex, inclusive, and toIndex, exclusive.
 func (l *List[T]) SubList(fromIndex, toIndex int) *List[T] {
 	data := l.data[fromIndex:toIndex]
@@ -323,3 +362,57 @@ func (l *List[T]) SubList(fromIndex, toIndex int) *List[T] {
 	copy(subList, data)
 	return NewList(subList)
 }
+
+// ForEach performs the given action for each element of the list.
+func (l *List[T]) ForEach(consumer func(T)) {
+	for _, it := range l.data {
+		consumer(it)
+	}
+}
+
+// RetainAll retains only the elements in this list that are contained in the given list.
+func (l *List[T]) RetainAll(list *List[T]) bool {
+	return l.batchRemove(list, true)
+}
+
+// DeleteAll removes from this list all of its elements that are contained in the given list.
+func (l *List[T]) DeleteAll(list *List[T]) bool {
+	return l.batchRemove(list, false)
+}
+
+func (l *List[T]) batchRemove(list *List[T], complement bool) bool {
+	var (
+		w    = 0
+		data = l.data
+		size = len(data)
+	)
+
+	for i := 0; i < size; i++ {
+		if list.Contain(data[i]) == complement {
+			data[w] = data[i]
+			w++
+		}
+	}
+
+	if w != size {
+		l.data = data[:w]
+		return true
+	}
+	return false
+}
+
+// Iterator returns an iterator over the elements in this list in proper sequence.
+func (l *List[T]) Iterator() iterator.Iterator[T] {
+	return iterator.FromSlice(l.data)
+}
+
+// ListToMap convert a list to a map based on iteratee function.
+func ListToMap[T any, K comparable, V any](list *List[T], iteratee func(T) (K, V)) map[K]V {
+	result := make(map[K]V, list.Size())
+	for _, item := range list.data {
+		k, v := iteratee(item)
+		result[k] = v
+	}
+
+	return result
+}
--- a/datastructure/list/list_test.go
+++ b/datastructure/list/list_test.go
@@ -328,6 +328,28 @@ func TestIntersection(t *testing.T) {
 	assert.Equal(true, expected.Equal(list3))
 }

+func TestDifference(t *testing.T) {
+	assert := internal.NewAssert(t, "TestDifference")
+
+	list1 := NewList([]int{1, 2, 3})
+	list2 := NewList([]int{1, 2, 4})
+	expected := NewList([]int{3})
+
+	list3 := list1.Difference(list2)
+	assert.Equal(true, expected.Equal(list3))
+}
+
+func TestSymmetricDifference(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSymmetricDifference")
+
+	list1 := NewList([]int{1, 2, 3})
+	list2 := NewList([]int{1, 2, 4})
+	expected := NewList([]int{3, 4})
+
+	list3 := list1.SymmetricDifference(list2)
+	assert.Equal(true, expected.Equal(list3))
+}
+
 func TestSubSlice(t *testing.T) {
 	assert := internal.NewAssert(t, "TestSubSlice")

@@ -357,3 +379,84 @@ func TestDeleteIf(t *testing.T) {
 	assert.Equal([]int{2, 3, 4}, list.Data())
 	assert.Equal(0, count)
 }
+
+func TestForEach(t *testing.T) {
+	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)
+	})
+
+	assert.Equal([]int{1, 2, 3, 4}, rs)
+}
+
+func TestRetainAll(t *testing.T) {
+	assert := internal.NewAssert(t, "TestRetainAll")
+
+	list := NewList([]int{1, 2, 3, 4})
+	list1 := NewList([]int{1, 2, 3, 4})
+	list2 := NewList([]int{1, 2, 3, 4})
+
+	retain := NewList([]int{1, 2})
+	retain1 := NewList([]int{2, 3})
+	retain2 := NewList([]int{1, 2, 5})
+
+	list.RetainAll(retain)
+	list1.RetainAll(retain1)
+	list2.RetainAll(retain2)
+
+	assert.Equal([]int{1, 2}, list.Data())
+	assert.Equal([]int{2, 3}, list1.Data())
+	assert.Equal([]int{1, 2}, list2.Data())
+}
+
+func TestDeleteAll(t *testing.T) {
+	assert := internal.NewAssert(t, "TestDeleteAll")
+
+	list := NewList([]int{1, 2, 3, 4})
+	list1 := NewList([]int{1, 2, 3, 4})
+	list2 := NewList([]int{1, 2, 3, 4})
+
+	del := NewList([]int{1})
+	del1 := NewList([]int{2, 3})
+	del2 := NewList([]int{1, 2, 5})
+
+	list.DeleteAll(del)
+	list1.DeleteAll(del1)
+	list2.DeleteAll(del2)
+	assert.Equal([]int{2, 3, 4}, list.Data())
+	assert.Equal([]int{1, 4}, list1.Data())
+	assert.Equal([]int{3, 4}, list2.Data())
+}
+
+func TestIterator(t *testing.T) {
+	assert := internal.NewAssert(t, "TestIterator")
+
+	list := NewList([]int{1, 2, 3, 4})
+
+	iterator := list.Iterator()
+
+	rs := make([]int, 0)
+	for iterator.HasNext() {
+		item, _ := iterator.Next()
+		rs = append(rs, item)
+	}
+
+	assert.Equal([]int{1, 2, 3, 4}, rs)
+}
+
+func TestListToMap(t *testing.T) {
+	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}
+
+	assert.Equal(expected, result)
+}
--- a/docs/concurrency_zh-CN.md
+++ b/docs/concurrency_zh-CN.md
@@ -46,7 +46,7 @@ import (
 type Channel[T any] struct
 func NewChannel[T any]() *Channel[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -70,7 +70,7 @@ func main() {
 ```go
 func (c *Channel[T]) Bridge(ctx context.Context, chanStream <-chan <-chan T) <-chan T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -122,7 +122,7 @@ func main() {
 ```go
 func (c *Channel[T]) FanIn(ctx context.Context, channels ...<-chan T) <-chan T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -161,7 +161,7 @@ func main() {
 ```go
 func (c *Channel[T]) Generate(ctx context.Context, values ...T) <-chan T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -199,7 +199,7 @@ func main() {
 ```go
 func (c *Channel[T]) Repeat(ctx context.Context, values ...T) <-chan T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -238,7 +238,7 @@ func main() {
 ```go
 func (c *Channel[T]) RepeatFn(ctx context.Context, fn func() T) <-chan T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -279,7 +279,7 @@ func main() {
 ```go
 func (c *Channel[T]) Or(channels ...<-chan T) <-chan T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -322,7 +322,7 @@ func main() {
 ```go
 func (c *Channel[T]) OrDone(ctx context.Context, channel <-chan T) <-chan T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -360,7 +360,7 @@ func main() {
 ```go
 func (c *Channel[T]) Take(ctx context.Context, valueStream <-chan T, number int) <-chan T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -406,7 +406,7 @@ func main() {
 ```go
 func (c *Channel[T]) Tee(ctx context.Context, in <-chan T) (<-chan T, <-chan T)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
--- a/docs/condition_zh-CN.md
+++ b/docs/condition_zh-CN.md
@@ -45,7 +45,7 @@ slices和map的length大于0时，返回true，否则返回false<br/>
 ```go
 func Bool[T any](value T) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -109,7 +109,7 @@ func main() {
 ```go
 func And[T, U any](a T, b U) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -135,7 +135,7 @@ func main() {
 ```go
 func Or[T, U any](a T, b U) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -161,7 +161,7 @@ func main() {
 ```go
 func Xor[T, U any](a T, b U) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -187,7 +187,7 @@ func main() {
 ```go
 func Nor[T, U any](a T, b U) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -213,7 +213,7 @@ func main() {
 ```go
 func Xnor[T, U any](a T, b U) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -239,7 +239,7 @@ func main() {
 ```go
 func Nand[T, U any](a T, b U) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -265,7 +265,7 @@ func main() {
 ```go
 func TernaryOperator[T, U any](isTrue T, ifValue U, elseValue U) U
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
--- a/docs/datastructure/hashmap_zh-CN.md
+++ b/docs/datastructure/hashmap_zh-CN.md
@@ -46,7 +46,7 @@ import (
 func NewHashMap() *HashMap
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -72,7 +72,7 @@ func main() {
 func NewHashMapWithCapacity(size, capacity uint64) *HashMap
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -98,7 +98,7 @@ func main() {
 func (hm *HashMap) Get(key any) any
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -126,7 +126,7 @@ func main() {
 func (hm *HashMap) Put(key any, value any) any
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -155,7 +155,7 @@ func main() {
 func (hm *HashMap) Delete(key any)
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -187,7 +187,7 @@ func main() {
 func (hm *HashMap) Contains(key any) bool
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -217,7 +217,7 @@ func main() {
 func (hm *HashMap) Iterate(iteratee func(key, value any))
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -252,7 +252,7 @@ func main() {
 func (hm *HashMap) Keys() []any
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -284,7 +284,7 @@ func main() {
 func (hm *HashMap) Values() []any
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
--- a/docs/datastructure/heap_zh-CN.md
+++ b/docs/datastructure/heap_zh-CN.md
@@ -48,7 +48,7 @@ type MaxHeap[T any] struct {
 }
 func NewMaxHeap[T any](comparator lancetconstraints.Comparator) *MaxHeap[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -89,7 +89,7 @@ func main() {
 ```go
 func (h *MaxHeap[T]) Push(value T)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -136,7 +136,7 @@ func main() {
 ```go
 func (h *MaxHeap[T]) Pop() (T, bool)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -184,7 +184,7 @@ func main() {
 ```go
 func (h *MaxHeap[T]) Peek() (T, bool)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -232,7 +232,7 @@ func main() {
 ```go
 func (h *MaxHeap[T]) Data() []T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -277,7 +277,7 @@ func main() {
 ```go
 func (h *MaxHeap[T]) Size() int
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -323,7 +323,7 @@ func main() {
 ```go
 func (h *MaxHeap[T]) PrintStructure()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
--- a/docs/datastructure/link_zh-CN.md
+++ b/docs/datastructure/link_zh-CN.md
@@ -81,7 +81,7 @@ type SinglyLink[T any] struct {
 }
 func NewSinglyLink[T any]() *SinglyLink[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -107,7 +107,7 @@ func main() {
 ```go
 func (link *SinglyLink[T]) Values() []T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -139,7 +139,7 @@ func main() {
 ```go
 func (link *SinglyLink[T]) InsertAt(index int, value T)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -174,7 +174,7 @@ func main() {
 ```go
 func (link *SinglyLink[T]) InsertAtHead(value T)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -206,7 +206,7 @@ func main() {
 ```go
 func (link *SinglyLink[T]) InsertAtTail(value T)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -237,7 +237,7 @@ func main() {
 ```go
 func (link *SinglyLink[T]) DeleteAt(index int)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -271,7 +271,7 @@ func main() {
 ```go
 func (link *SinglyLink[T]) DeleteAtHead()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -306,7 +306,7 @@ func main() {
 ```go
 func (link *SinglyLink[T]) DeleteAtTail()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -339,7 +339,7 @@ func main() {
 ```go
 func (link *SinglyLink[T]) DeleteValue(value T)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -373,7 +373,7 @@ func main() {
 ```go
 func (link *SinglyLink[T]) Reverse()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -405,7 +405,7 @@ func main() {
 ```go
 func (link *SinglyLink[T]) GetMiddleNode() *datastructure.LinkNode[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -437,7 +437,7 @@ func main() {
 ```go
 func (link *SinglyLink[T]) Size() int
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -468,7 +468,7 @@ func main() {
 ```go
 func (link *SinglyLink[T]) IsEmpty() bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -500,7 +500,7 @@ func main() {
 ```go
 func (link *SinglyLink[T]) Clear()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -533,7 +533,7 @@ func main() {
 ```go
 func (link *SinglyLink[T]) Clear()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -576,7 +576,7 @@ type DoublyLink[T any] struct {
 }
 func NewDoublyLink[T any]() *DoublyLink[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -602,7 +602,7 @@ func main() {
 ```go
 func (link *DoublyLink[T]) Values() []T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -634,7 +634,7 @@ func main() {
 ```go
 func (link *DoublyLink[T]) InsertAt(index int, value T)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -669,7 +669,7 @@ func main() {
 ```go
 func (link *DoublyLink[T]) InsertAtHead(value T)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -701,7 +701,7 @@ func main() {
 ```go
 func (link *DoublyLink[T]) InsertAtTail(value T)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -732,7 +732,7 @@ func main() {
 ```go
 func (link *DoublyLink[T]) DeleteAt(index int)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -766,7 +766,7 @@ func main() {
 ```go
 func (link *DoublyLink[T]) DeleteAtHead()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -801,7 +801,7 @@ func main() {
 ```go
 func (link *DoublyLink[T]) DeleteAtTail()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -835,7 +835,7 @@ func main() {
 ```go
 func (link *DoublyLink[T]) Reverse()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -867,7 +867,7 @@ func main() {
 ```go
 func (link *DoublyLink[T]) GetMiddleNode() *datastructure.LinkNode[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -899,7 +899,7 @@ func main() {
 ```go
 func (link *DoublyLink[T]) Size() int
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -930,7 +930,7 @@ func main() {
 ```go
 func (link *DoublyLink[T]) IsEmpty() bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -962,7 +962,7 @@ func main() {
 ```go
 func (link *DoublyLink[T]) Clear()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -995,7 +995,7 @@ func main() {
 ```go
 func (link *DoublyLink[T]) Clear()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
--- a/docs/datastructure/list.md
+++ b/docs/datastructure/list.md
@@ -47,6 +47,13 @@ import (
 - [Unique](#Unique)
 - [Union](#Union)
 - [Intersection](#Intersection)
+- [Difference](#Difference)
+- [SymmetricDifference](#SymmetricDifference)
+- [RetainAll](#RetainAll)
+- [DeleteAll](#DeleteAll)
+- [ForEach](#ForEach)
+- [Iterator](#Iterator)
+- [ListToMap](#ListToMap)
 - [SubList](#SubList)
 - [DeleteIf](#DeleteIf)

@@ -62,7 +69,7 @@ NewList function return a list pointer</p>

 ```go
 type List[T any] struct {
-	data []T
+    data []T
 }
 func NewList[T any](data []T) *List[T]
 ```
@@ -671,8 +678,8 @@ import (
 )

 func main() {
-	data := make([]int, 0, 100)
-	
+    data := make([]int, 0, 100)
+    
    li := list.NewList(data)

    fmt.Println(li.Cap()) // 100
@@ -828,6 +835,233 @@ func main() {



+### <span id="Difference">Difference</span>
+<p>Return a list whose element in the original list, not in the given list.</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) Difference(other *List[T]) *List[T]
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    list1 := NewList([]int{1, 2, 3})
+    list2 := NewList([]int{1, 2, 4})
+
+    list3 := list1.Intersection(list2)
+
+    fmt.Println(list3.Data()) //3
+}
+```
+
+
+### <span id="SymmetricDifference">SymmetricDifference</span>
+<p>Oppoiste operation of intersection function.</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) SymmetricDifference(other *List[T]) *List[T]
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    list1 := NewList([]int{1, 2, 3})
+    list2 := NewList([]int{1, 2, 4})
+
+    list3 := list1.Intersection(list2)
+
+    fmt.Println(list3.Data()) //3, 4
+}
+```
+
+
+### <span id="RetainAll">RetainAll</span>
+<p>Retains only the elements in this list that are contained in the given list.</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) RetainAll(list *List[T]) bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    list := NewList([]int{1, 2, 3, 4})
+    list1 := NewList([]int{1, 2, 3, 4})
+    list2 := NewList([]int{1, 2, 3, 4})
+
+    retain := NewList([]int{1, 2})
+    retain1 := NewList([]int{2, 3})
+    retain2 := NewList([]int{1, 2, 5})
+
+    list.RetainAll(retain)
+    list1.RetainAll(retain1)
+    list2.RetainAll(retain2)
+
+    fmt.Println(list.Data()) //1, 2
+    fmt.Println(list1.Data()) //2, 3
+    fmt.Println(list2.Data()) //1, 2
+}
+```
+
+
+### <span id="DeleteAll">DeleteAll</span>
+<p>Removes from this list all of its elements that are contained in the given list.</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) DeleteAll(list *List[T]) bool
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    list := NewList([]int{1, 2, 3, 4})
+    list1 := NewList([]int{1, 2, 3, 4})
+    list2 := NewList([]int{1, 2, 3, 4})
+
+    del := NewList([]int{1})
+    del1 := NewList([]int{2, 3})
+    del2 := NewList([]int{1, 2, 5})
+
+    list.DeleteAll(del)
+    list1.DeleteAll(del1)
+    list2.DeleteAll(del2)
+
+    fmt.Println(list.Data()) //2,3,4
+    fmt.Println(list1.Data()) //1,4
+    fmt.Println(list2.Data()) //3,4
+}
+```
+
+
+### <span id="ForEach">ForEach</span>
+<p>Performs the given action for each element of the list.</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) ForEach(consumer func(T))
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    list := NewList([]int{1, 2, 3, 4})
+
+    result := make([]int, 0)
+    list.ForEach(func(i int) {
+        result = append(result, i)
+    })
+
+    fmt.Println(result.Data()) //1,2,3,4
+}
+```
+
+
+### <span id="Iterator">Iterator</span>
+<p>Returns an iterator over the elements in this list in proper sequence.</p>
+
+<b>Signature:</b>
+
+```go
+func (l *List[T]) Iterator() iterator.Iterator[T]
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    list := NewList([]int{1, 2, 3, 4})
+
+    iterator := list.Iterator()
+
+    result := make([]int, 0)
+    for iterator.HasNext() {
+        item, _ := iterator.Next()
+        result = append(result, item)
+    }
+
+    fmt.Println(result.Data()) //1,2,3,4
+}
+```
+
+
+### <span id="ListToMap">ListToMap</span>
+<p>Converts a list to a map based on iteratee function.</p>
+
+<b>Signature:</b>
+
+```go
+func ListToMap[T any, K comparable, V any](list *List[T], iteratee func(T) (K, V)) map[K]V
+```
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    list := NewList([]int{1, 2, 3, 4})
+
+    result := ListToMap(list, func(n int) (int, bool) {
+        return n, n > 1
+    })
+
+    fmt.Println(result) //map[int]bool{1: false, 2: true, 3: true, 4: true}
+}
+```

 ### <span id="SubList">SubList</span>
 <p>SubList returns a sub list of the original list between the specified fromIndex, inclusive, and toIndex, exclusive.</p>
@@ -876,9 +1110,9 @@ import (
 )

 func main() {
-	l := list.NewList([]int{1, 1, 1, 1, 2, 3, 1, 1, 4, 1, 1, 1, 1, 1, 1})
+    l := list.NewList([]int{1, 1, 1, 1, 2, 3, 1, 1, 4, 1, 1, 1, 1, 1, 1})

-	fmt.Println(l.DeleteIf(func(a int) bool { return a == 1 })) // 12 
-	fmt.Println(l.Data()) // []int{2, 3, 4}
+    fmt.Println(l.DeleteIf(func(a int) bool { return a == 1 })) // 12 
+    fmt.Println(l.Data()) // []int{2, 3, 4}
 }
 ```
--- a/docs/datastructure/list_zh-CN.md
+++ b/docs/datastructure/list_zh-CN.md
@@ -34,7 +34,6 @@ import (
 - [PopLast](#PopLast)
 - [DeleteAt](#DeleteAt)
 - [InsertAt](#InsertAt)
-
 - [UpdateAt](#UpdateAt)
 - [Equal](#Equal)
 - [IsEmpty](#IsEmpty)
@@ -48,6 +47,13 @@ import (
 - [Unique](#Unique)
 - [Union](#Union)
 - [Intersection](#Intersection)
+- [Difference](#Difference)
+- [SymmetricDifference](#SymmetricDifference)
+- [RetainAll](#RetainAll)
+- [DeleteAll](#DeleteAll)
+- [ForEach](#ForEach)
+- [Iterator](#Iterator)
+- [ListToMap](#ListToMap)
 - [SubList](#SubList)
 - [DeleteIf](#DeleteIf)

@@ -62,11 +68,11 @@ import (

 ```go
 type List[T any] struct {
-	data []T
+    data []T
 }
 func NewList[T any](data []T) *List[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -92,7 +98,7 @@ func main() {
 ```go
 func (l *List[T]) Contain(value T) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -121,7 +127,7 @@ func main() {
 ```go
 func (l *List[T]) Data() []T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -150,7 +156,7 @@ func main() {
 ```go
 func (l *List[T]) ValueOf(index int) (*T, bool)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -180,7 +186,7 @@ func main() {
 ```go
 func (l *List[T]) IndexOf(value T) int
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -207,7 +213,7 @@ func main() {
 ```go
 func (l *List[T]) LastIndexOf(value T) int
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -233,7 +239,7 @@ func main() {
 ```go
 func (l *List[T]) IndexOfFunc(f func(T) bool) int 
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -259,7 +265,7 @@ func main() {
 ```go
 func (l *List[T]) LastIndexOfFunc(f func(T) bool) int
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -287,7 +293,7 @@ func main() {
 ```go
 func (l *List[T]) Push(value T)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -316,7 +322,7 @@ func main() {
 ```go
 func (l *List[T]) PopFirst() (*T, bool)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -348,7 +354,7 @@ func main() {
 ```go
 func (l *List[T]) PopLast() (*T, bool)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -379,7 +385,7 @@ func main() {
 ```go
 func (l *List[T]) DeleteAt(index int)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -417,7 +423,7 @@ func main() {
 ```go
 func (l *List[T]) InsertAt(index int, value T)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -454,7 +460,7 @@ func main() {
 ```go
 func (l *List[T]) UpdateAt(index int, value T)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -487,7 +493,7 @@ func main() {
 ```go
 func (l *List[T]) Equal(other *List[T]) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -517,7 +523,7 @@ func main() {
 ```go
 func (l *List[T]) IsEmpty() bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -547,7 +553,7 @@ func main() {
 ```go
 func (l *List[T]) Clear()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -575,7 +581,7 @@ func main() {
 ```go
 func (l *List[T]) Clone() *List[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -604,7 +610,7 @@ func main() {
 ```go
 func (l *List[T]) Merge(other *List[T]) *List[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -633,7 +639,7 @@ func main() {
 ```go
 func (l *List[T]) Size() int
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -660,7 +666,7 @@ func main() {
 ```go
 func (l *List[T]) Cap() int
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -671,8 +677,8 @@ import (
 )

 func main() {
-	data := make([]int, 0, 100)
-	
+    data := make([]int, 0, 100)
+    
    li := list.NewList(data)

    fmt.Println(li.Cap()) // 100
@@ -689,7 +695,7 @@ func main() {
 ```go
 func (l *List[T]) Swap(i, j int)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -718,7 +724,7 @@ func main() {
 ```go
 func (l *List[T]) Reverse()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -747,7 +753,7 @@ func main() {
 ```go
 func (l *List[T]) Unique()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -776,7 +782,7 @@ func main() {
 ```go
 func (l *List[T]) Union(other *List[T]) *List[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -806,7 +812,7 @@ func main() {
 ```go
 func (l *List[T]) Intersection(other *List[T]) *List[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -826,16 +832,244 @@ func main() {
 ```


+### <span id="Difference">Difference</span>
+<p>差集运算。</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) Difference(other *List[T]) *List[T]
+```
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    list1 := NewList([]int{1, 2, 3})
+    list2 := NewList([]int{1, 2, 4})
+
+    list3 := list1.Intersection(list2)
+
+    fmt.Println(list3.Data()) //3
+}
+```
+
+
+### <span id="SymmetricDifference">SymmetricDifference</span>
+<p>对称差集运算。</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) SymmetricDifference(other *List[T]) *List[T]
+```
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    list1 := NewList([]int{1, 2, 3})
+    list2 := NewList([]int{1, 2, 4})
+
+    list3 := list1.Intersection(list2)
+
+    fmt.Println(list3.Data()) //3, 4
+}
+```
+
+
+### <span id="RetainAll">RetainAll</span>
+<p>仅保留列表中包含在给定列表中的元素。</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) RetainAll(list *List[T]) bool
+```
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    list := NewList([]int{1, 2, 3, 4})
+    list1 := NewList([]int{1, 2, 3, 4})
+    list2 := NewList([]int{1, 2, 3, 4})
+
+    retain := NewList([]int{1, 2})
+    retain1 := NewList([]int{2, 3})
+    retain2 := NewList([]int{1, 2, 5})
+
+    list.RetainAll(retain)
+    list1.RetainAll(retain1)
+    list2.RetainAll(retain2)
+
+    fmt.Println(list.Data()) //1, 2
+    fmt.Println(list1.Data()) //2, 3
+    fmt.Println(list2.Data()) //1, 2
+}
+```
+
+
+### <span id="DeleteAll">DeleteAll</span>
+<p>从列表中删除给定列表中包含的所有元素。</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) DeleteAll(list *List[T]) bool
+```
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    list := NewList([]int{1, 2, 3, 4})
+    list1 := NewList([]int{1, 2, 3, 4})
+    list2 := NewList([]int{1, 2, 3, 4})
+
+    del := NewList([]int{1})
+    del1 := NewList([]int{2, 3})
+    del2 := NewList([]int{1, 2, 5})
+
+    list.DeleteAll(del)
+    list1.DeleteAll(del1)
+    list2.DeleteAll(del2)
+
+    fmt.Println(list.Data()) //2,3,4
+    fmt.Println(list1.Data()) //1,4
+    fmt.Println(list2.Data()) //3,4
+}
+```
+
+
+### <span id="ForEach">ForEach</span>
+<p>对列表的每个元素执行给定的操作。</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) ForEach(consumer func(T))
+```
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    list := NewList([]int{1, 2, 3, 4})
+
+    result := make([]int, 0)
+    list.ForEach(func(i int) {
+        result = append(result, i)
+    })
+
+    fmt.Println(result.Data()) //1,2,3,4
+}
+```
+
+
+### <span id="Iterator">Iterator</span>
+<p>按顺序返回列表中元素的迭代器。</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *List[T]) Iterator() iterator.Iterator[T]
+```
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    list := NewList([]int{1, 2, 3, 4})
+
+    iterator := list.Iterator()
+
+    result := make([]int, 0)
+    for iterator.HasNext() {
+        item, _ := iterator.Next()
+        result = append(result, item)
+    }
+
+    fmt.Println(result.Data()) //1,2,3,4
+}
+```
+
+
+### <span id="ListToMap">ListToMap</span>
+<p>基于iteratee函数将列表转换为映射map。</p>
+
+<b>函数签名:</b>
+
+```go
+func ListToMap[T any, K comparable, V any](list *List[T], iteratee func(T) (K, V)) map[K]V
+```
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    list "github.com/duke-git/lancet/v2/datastructure/list"
+)
+
+func main() {
+    list := NewList([]int{1, 2, 3, 4})
+
+    result := ListToMap(list, func(n int) (int, bool) {
+        return n, n > 1
+    })
+
+    fmt.Println(result) //map[int]bool{1: false, 2: true, 3: true, 4: true}
+}
+```
+

 ### <span id="SubList">SubList</span>
-<p>SubList returns a sub list of the original list between the specified fromIndex, inclusive, and toIndex, exclusive.</p>
+<p>返回指定的fromIndex（包含）和toIndex（不包含）之间的原始列表的子列表。</p>

 <b>函数签名:</b>

 ```go
 func (l *List[T]) SubList(fromIndex, toIndex int) *List[T] 
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -863,7 +1097,7 @@ func main() {
 ```go
 func (l *List[T]) DeleteIf(f func(T) bool) int
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -874,9 +1108,9 @@ import (
 )

 func main() {
-	l := list.NewList([]int{1, 1, 1, 1, 2, 3, 1, 1, 4, 1, 1, 1, 1, 1, 1})
+    l := list.NewList([]int{1, 1, 1, 1, 2, 3, 1, 1, 4, 1, 1, 1, 1, 1, 1})

-	fmt.Println(l.DeleteIf(func(a int) bool { return a == 1 })) // 12 
-	fmt.Println(l.Data()) // []int{2, 3, 4}
+    fmt.Println(l.DeleteIf(func(a int) bool { return a == 1 })) // 12 
+    fmt.Println(l.Data()) // []int{2, 3, 4}
 }
 ```
--- a/docs/datastructure/queue_zh-CN.md
+++ b/docs/datastructure/queue_zh-CN.md
@@ -99,7 +99,7 @@ type ArrayQueue[T any] struct {
 	size     int
 }
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -125,7 +125,7 @@ func main() {
 ```go
 func (q *ArrayQueue[T]) Data() []T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -152,7 +152,7 @@ func main() {
 ```go
 func (q *ArrayQueue[T]) Enqueue(item T) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -183,7 +183,7 @@ func main() {
 ```go
 func (q *ArrayQueue[T]) Dequeue() (T, bool)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -215,7 +215,7 @@ func main() {
 ```go
 func (q *ArrayQueue[T]) Front() T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -247,7 +247,7 @@ func main() {
 ```go
 func (q *ArrayQueue[T]) Back() T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -278,7 +278,7 @@ func main() {
 ```go
 func (q *ArrayQueue[T]) Size() int
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -308,7 +308,7 @@ func main() {
 ```go
 func (q *ArrayQueue[T]) IsEmpty() bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -341,7 +341,7 @@ func main() {
 ```go
 func (q *ArrayQueue[T]) IsFull() bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -373,7 +373,7 @@ func main() {
 ```go
 func (q *ArrayQueue[T]) Clear()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -404,7 +404,7 @@ func main() {
 ```go
 func (q *ArrayQueue[T]) Contain(value T) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -448,7 +448,7 @@ type QueueNode[T any] struct {
 	Next  *QueueNode[T]
 }
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -474,7 +474,7 @@ func main() {
 ```go
 func (q *LinkedQueue[T]) Data() []T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -501,7 +501,7 @@ func main() {
 ```go
 func (q *LinkedQueue[T]) Enqueue(value T)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -532,7 +532,7 @@ func main() {
 ```go
 func (q *LinkedQueue[T]) Dequeue() (T, error)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -564,7 +564,7 @@ func main() {
 ```go
 func (q *LinkedQueue[T]) Front() (*T, error)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -596,7 +596,7 @@ func main() {
 ```go
 func (q *LinkedQueue[T]) Back() (*T, error) 
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -627,7 +627,7 @@ func main() {
 ```go
 func (q *LinkedQueue[T]) Size() int
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -657,7 +657,7 @@ func main() {
 ```go
 func (q *LinkedQueue[T]) IsEmpty() bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -690,7 +690,7 @@ func main() {
 ```go
 func (q *LinkedQueue[T]) Clear()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -721,7 +721,7 @@ func main() {
 ```go
 func (q *LinkedQueue[T]) Contain(value T) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -763,7 +763,7 @@ type CircularQueue[T any] struct {
 	capacity  int
 }
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -789,7 +789,7 @@ func main() {
 ```go
 func (q *CircularQueue[T]) Data() []T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -816,7 +816,7 @@ func main() {
 ```go
 func (q *CircularQueue[T]) Enqueue(value T) error
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -847,7 +847,7 @@ func main() {
 ```go
 func (q *CircularQueue[T]) Dequeue() (*T, bool)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -880,7 +880,7 @@ func main() {
 ```go
 func (q *CircularQueue[T]) Front() T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -912,7 +912,7 @@ func main() {
 ```go
 func (q *CircularQueue[T]) Back() T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -943,7 +943,7 @@ func main() {
 ```go
 func (q *CircularQueue[T]) Size() int
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -973,7 +973,7 @@ func main() {
 ```go
 func (q *CircularQueue[T]) IsEmpty() bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -1006,7 +1006,7 @@ func main() {
 ```go
 func (q *CircularQueue[T]) IsFull() bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -1038,7 +1038,7 @@ func main() {
 ```go
 func (q *CircularQueue[T]) Clear()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -1069,7 +1069,7 @@ func main() {
 ```go
 func (q *CircularQueue[T]) Contain(value T) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -1108,7 +1108,7 @@ type PriorityQueue[T any] struct {
 	comparator lancetconstraints.Comparator
 }
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -1134,7 +1134,7 @@ func main() {
 ```go
 func (q *PriorityQueue[T]) Data() []T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -1161,7 +1161,7 @@ func main() {
 ```go
 func (q *PriorityQueue[T]) Enqueue(item T) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -1207,7 +1207,7 @@ func main() {
 ```go
 func (q *PriorityQueue[T]) Dequeue() (T, bool)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -1254,7 +1254,7 @@ func main() {
 ```go
 func (q *PriorityQueue[T]) IsEmpty() bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -1301,7 +1301,7 @@ func main() {
 ```go
 func (q *PriorityQueue[T]) IsFull() bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -1348,7 +1348,7 @@ func main() {
 ```go
 func (q *PriorityQueue[T]) Size() int
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
--- a/docs/datastructure/set_zh-CN.md
+++ b/docs/datastructure/set_zh-CN.md
@@ -55,7 +55,7 @@ import (
 type Set[T comparable] map[T]bool
 func NewSet[T comparable](items ...T) Set[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -81,7 +81,7 @@ func main() {
 ```go
 func NewSetFromSlice[T comparable](items []T) Set[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -107,7 +107,7 @@ func main() {
 ```go
 func (s Set[T]) Values() []T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -134,7 +134,7 @@ func main() {
 ```go
 func (s Set[T]) Add(items ...T)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -161,7 +161,7 @@ func main() {
 ```go
 func (s Set[T]) AddIfNotExist(item T) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -193,7 +193,7 @@ func main() {
 ```go
 func (s Set[T]) AddIfNotExistBy(item T, checker func(element T) bool) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -232,7 +232,7 @@ func main() {
 ```go
 func (s Set[T]) Delete(items ...T)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -261,7 +261,7 @@ func main() {
 ```go
 func (s Set[T]) Contain(item T) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -291,7 +291,7 @@ func main() {
 ```go
 func (s Set[T]) ContainAll(other Set[T]) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -321,7 +321,7 @@ func main() {
 ```go
 func (s Set[T]) Size() int
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -348,7 +348,7 @@ func main() {
 ```go
 func (s Set[T]) Clone() Set[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -378,7 +378,7 @@ func main() {
 ```go
 func (s Set[T]) Equal(other Set[T]) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -408,7 +408,7 @@ func main() {
 ```go
 func (s Set[T]) Iterate(fn func(item T))
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -439,7 +439,7 @@ func main() {
 ```go
 func (s Set[T]) IsEmpty() bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -468,7 +468,7 @@ func main() {
 ```go
 func (s Set[T]) Union(other Set[T]) Set[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -497,7 +497,7 @@ func main() {
 ```go
 func (s Set[T]) Intersection(other Set[T]) Set[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -525,7 +525,7 @@ func main() {
 ```go
 func (s Set[T]) SymmetricDifference(other Set[T]) Set[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -556,7 +556,7 @@ func main() {
 ```go
 func (s Set[T]) Minus(comparedSet Set[T]) Set[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
--- a/docs/datastructure/stack_zh-CN.md
+++ b/docs/datastructure/stack_zh-CN.md
@@ -64,7 +64,7 @@ type ArrayStack[T any] struct {
 }
 func NewArrayStack[T any]() *ArrayStack[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -91,7 +91,7 @@ func main() {
 ```go
 func (s *ArrayStack[T]) Push(value T)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -122,7 +122,7 @@ func main() {
 ```go
 func (s *ArrayStack[T]) Pop() (*T, error)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -157,7 +157,7 @@ func main() {
 ```go
 func (s *ArrayStack[T]) Peak() (*T, error)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -192,7 +192,7 @@ func main() {
 ```go
 func (s *ArrayStack[T]) Data() []T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -223,7 +223,7 @@ func main() {
 ```go
 func (s *ArrayStack[T]) Size() int
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -254,7 +254,7 @@ func main() {
 ```go
 func (s *ArrayStack[T]) IsEmpty() bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -287,7 +287,7 @@ func main() {
 ```go
 func (s *ArrayStack[T]) Clear()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -331,7 +331,7 @@ type LinkedStack[T any] struct {
 }
 func NewLinkedStack[T any]() *LinkedStack[T]
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -358,7 +358,7 @@ func main() {
 ```go
 func (s *LinkedStack[T]) Push(value T)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -389,7 +389,7 @@ func main() {
 ```go
 func (s *LinkedStack[T]) Pop() (*T, error)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -424,7 +424,7 @@ func main() {
 ```go
 func (s *LinkedStack[T]) Peak() (*T, error)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -459,7 +459,7 @@ func main() {
 ```go
 func (s *LinkedStack[T]) Data() []T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -490,7 +490,7 @@ func main() {
 ```go
 func (s *LinkedStack[T]) Size() int
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -521,7 +521,7 @@ func main() {
 ```go
 func (s *LinkedStack[T]) IsEmpty() bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -554,7 +554,7 @@ func main() {
 ```go
 func (s *LinkedStack[T]) Clear()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -588,7 +588,7 @@ func main() {
 ```go
 func (s *LinkedStack[T]) Print()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
--- a/docs/datastructure/tree_zh-CN.md
+++ b/docs/datastructure/tree_zh-CN.md
@@ -62,7 +62,7 @@ type TreeNode[T any] struct {
 	Right *TreeNode[T]
 }
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -103,7 +103,7 @@ func main() {
 ```go
 func (t *BSTree[T]) Insert(data T)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -149,7 +149,7 @@ func main() {
 ```go
 func (t *BSTree[T]) Delete(data T)
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -197,7 +197,7 @@ func main() {
 ```go
 func (t *BSTree[T]) PreOrderTraverse() []T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -243,7 +243,7 @@ func main() {
 ```go
 func (t *BSTree[T]) InOrderTraverse() []T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -289,7 +289,7 @@ func main() {
 ```go
 func (t *BSTree[T]) PostOrderTraverse() []T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -335,7 +335,7 @@ func main() {
 ```go
 func (t *BSTree[T]) LevelOrderTraverse() []T
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -381,7 +381,7 @@ func main() {
 ```go
 func (t *BSTree[T]) Depth() int
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -427,7 +427,7 @@ func main() {
 ```go
 func (t *BSTree[T]) HasSubTree(subTree *BSTree[T]) bool
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -479,7 +479,7 @@ func main() {
 ```go
 func (t *BSTree[T]) Print()
 ```
-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
--- a/docs/fileutil_zh-CN.md
+++ b/docs/fileutil_zh-CN.md
@@ -52,7 +52,7 @@ import (
 func ClearFile(path string) error
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -80,7 +80,7 @@ func main() {
 func CreateFile(path string) bool
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -132,7 +132,7 @@ func main() {
 func CopyFile(srcFilePath string, dstFilePath string) error
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -160,7 +160,7 @@ func main() {
 func FileMode(path string) (fs.FileMode, error)
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -189,7 +189,7 @@ func main() {
 func MiMeType(file any) string
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -220,7 +220,7 @@ func main() {
 func IsExist(path string) bool
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -247,7 +247,7 @@ func main() {
 func IsLink(path string) bool
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -273,7 +273,7 @@ func main() {
 func IsDir(path string) bool
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -302,7 +302,7 @@ func main() {
 func ListFileNames(path string) ([]string, error)
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -328,7 +328,7 @@ func main() {
 func RemoveFile(path string) error
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -356,7 +356,7 @@ func main() {
 func ReadFileToString(path string) (string, error)
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -389,7 +389,7 @@ func main() {
 func ReadFileByLine(path string)([]string, error)
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -423,7 +423,7 @@ func main() {
 func Zip(fpath string, destPath string) error
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -451,7 +451,7 @@ func main() {
 func UnZip(zipFile string, destPath string) error
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
--- a/docs/formatter_zh-CN.md
+++ b/docs/formatter_zh-CN.md
@@ -38,7 +38,7 @@ import (
 func Comma[T constraints.Float | constraints.Integer | string](value T, symbol string) string
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
--- a/docs/function_zh-CN.md
+++ b/docs/function_zh-CN.md
@@ -46,7 +46,7 @@ import (
 func After(n int, fn any) func(args ...any) []reflect.Value
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -79,7 +79,7 @@ func main() {
 func Before(n int, fn any) func(args ...any) []reflect.Value
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -117,7 +117,7 @@ type CurryFn[T any] func(...T) T
 func (cf CurryFn[T]) New(val T) func(...T) T
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -156,7 +156,7 @@ func main() {
 func Compose[T any](fnList ...func(...T) T) func(...T) T
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -194,7 +194,7 @@ func main() {
 func Debounced(fn func(), duration time.Duration) func()
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -244,7 +244,7 @@ func main() {
 func Delay(delay time.Duration, fn any, args ...any)
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -276,7 +276,7 @@ func main() {
 func Schedule(d time.Duration, fn any, args ...any) chan bool
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -315,7 +315,7 @@ func main() {
 func Pipeline[T any](funcs ...func(T) T) func(T) T
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -366,7 +366,7 @@ func (w *Watcher) Reset() //reset the watcher
 func (w *Watcher) GetElapsedTime() time.Duration //get the elapsed time of function execution
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
--- a/docs/maputil_zh-CN.md
+++ b/docs/maputil_zh-CN.md
@@ -45,7 +45,7 @@ import (
 func ForEach[K comparable, V any](m map[K]V, iteratee func(key K, value V))
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -86,7 +86,7 @@ func main() {
 func Filter[K comparable, V any](m map[K]V, predicate func(key K, value V) bool) map[K]V
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -131,7 +131,7 @@ func main() {
 func Intersect[K comparable, V any](maps ...map[K]V) map[K]V
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -186,7 +186,7 @@ func main() {
 func Keys[K comparable, V any](m map[K]V) []K
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -225,7 +225,7 @@ func main() {
 func Merge[K comparable, V any](maps ...map[K]V) map[K]V
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -264,7 +264,7 @@ func main() {
 func Minus[K comparable, V any](mapA, mapB map[K]V) map[K]V
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -306,7 +306,7 @@ func main() {
 func Values[K comparable, V any](m map[K]V) []V
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -343,7 +343,7 @@ func main() {
 func IsDisjoint[K comparable, V any](mapA, mapB map[K]V) bool
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
--- a/docs/mathutil_zh-CN.md
+++ b/docs/mathutil_zh-CN.md
@@ -49,7 +49,7 @@ import (
 func Average[T constraints.Integer | constraints.Float](numbers ...T) T
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -84,7 +84,7 @@ func main() {
 func Exponent(x, n int64) int64
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -120,7 +120,7 @@ func main() {
 func Fibonacci(first, second, n int) int
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -156,7 +156,7 @@ func main() {
 func Factorial(x uint) uint
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -192,7 +192,7 @@ func main() {
 func Max[T constraints.Integer | constraints.Float](numbers ...T) T
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -225,7 +225,7 @@ func main() {
 func MaxBy[T any](slice []T, comparator func(T, T) bool) T
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -269,7 +269,7 @@ func main() {
 func Min[T constraints.Integer | constraints.Float](numbers ...T) T
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -302,7 +302,7 @@ func main() {
 func MinBy[T any](slice []T, comparator func(T, T) bool) T
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -346,7 +346,7 @@ func main() {
 func Percent(val, total float64, n int) float64
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -379,7 +379,7 @@ func main() {
 func RoundToFloat(x float64, n int) float64
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -415,7 +415,7 @@ func main() {
 func RoundToString(x float64, n int) string
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -451,7 +451,7 @@ func main() {
 func TruncRound(x float64, n int) float64
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
--- a/docs/netutil.md
+++ b/docs/netutil.md
--- a/docs/netutil_zh-CN.md
+++ b/docs/netutil_zh-CN.md
--- a/docs/random.md
+++ b/docs/random.md
@@ -56,8 +56,8 @@ import (
 )

 func main() {
-	randBytes := random.RandBytes(4)
-	fmt.Println(randBytes)
+    randBytes := random.RandBytes(4)
+    fmt.Println(randBytes)
 }
 ```

@@ -82,8 +82,8 @@ import (
 )

 func main() {
-	rInt := random.RandInt(1, 10)
-	fmt.Println(rInt)
+    rInt := random.RandInt(1, 10)
+    fmt.Println(rInt)
 }
 ```

@@ -108,8 +108,8 @@ import (
 )

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

@@ -134,8 +134,8 @@ import (
 )

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

@@ -160,8 +160,8 @@ import (
 )

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

@@ -186,8 +186,8 @@ import (
 )

 func main() {
-	randStr := random.RandNumeral(6)
-	fmt.Println(randStr) //035172
+    randStr := random.RandNumeral(6)
+    fmt.Println(randStr) //035172
 }
 ```

@@ -212,8 +212,8 @@ import (
 )

 func main() {
-	randStr := random.RandNumeralOrLetter(6)
-	fmt.Println(randStr) //0aW7cQ
+    randStr := random.RandNumeralOrLetter(6)
+    fmt.Println(randStr) //0aW7cQ
 }
 ```

@@ -238,10 +238,10 @@ import (
 )

 func main() {
-	uuid, err := random.UUIdV4()
+    uuid, err := random.UUIdV4()
    if err != nil {
        return
    }
-	fmt.Println(uuid)
+    fmt.Println(uuid)
 }
 ```
--- a/docs/random_zh-CN.md
+++ b/docs/random_zh-CN.md
@@ -45,7 +45,7 @@ import (
 func RandBytes(length int) []byte
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -56,8 +56,8 @@ import (
 )

 func main() {
-	randBytes := random.RandBytes(4)
-	fmt.Println(randBytes)
+    randBytes := random.RandBytes(4)
+    fmt.Println(randBytes)
 }
 ```

@@ -71,7 +71,7 @@ func main() {
 func RandInt(min, max int) int
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -82,8 +82,8 @@ import (
 )

 func main() {
-	rInt := random.RandInt(1, 10)
-	fmt.Println(rInt)
+    rInt := random.RandInt(1, 10)
+    fmt.Println(rInt)
 }
 ```

@@ -97,7 +97,7 @@ func main() {
 func RandString(length int) string
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -108,8 +108,8 @@ import (
 )

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

@@ -123,7 +123,7 @@ func main() {
 func RandUpper(length int) string
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -134,8 +134,8 @@ import (
 )

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

@@ -149,7 +149,7 @@ func main() {
 func RandLower(length int) string
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -160,8 +160,8 @@ import (
 )

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

@@ -175,7 +175,7 @@ func main() {
 func RandNumeral(length int) string
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -186,8 +186,8 @@ import (
 )

 func main() {
-	randStr := random.RandNumeral(6)
-	fmt.Println(randStr) //035172
+    randStr := random.RandNumeral(6)
+    fmt.Println(randStr) //035172
 }
 ```

@@ -201,7 +201,7 @@ func main() {
 func RandNumeralOrLetter(length int) string
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -212,8 +212,8 @@ import (
 )

 func main() {
-	randStr := random.RandNumeralOrLetter(6)
-	fmt.Println(randStr) //0aW7cQ
+    randStr := random.RandNumeralOrLetter(6)
+    fmt.Println(randStr) //0aW7cQ
 }
 ```

@@ -227,7 +227,7 @@ func main() {
 func UUIdV4() (string, error)
 ```

-<b>例子:</b>
+<b>示例:</b>

 ```go
 package main
@@ -238,10 +238,10 @@ import (
 )

 func main() {
-	uuid, err := random.UUIdV4()
+    uuid, err := random.UUIdV4()
    if err != nil {
        return
    }
-	fmt.Println(uuid)
+    fmt.Println(uuid)
 }
 ```
--- a/docs/retry.md
+++ b/docs/retry.md
@@ -1,16 +1,17 @@
 # Retry
+
 Package retry is for executing a function repeatedly until it was successful or canceled by the context.

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

 ## Source:

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

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

 ## Usage:
+
 ```go
 import (
    "github.com/duke-git/lancet/v2/retry"
@@ -20,18 +21,19 @@ import (
 <div STYLE="page-break-after: always;"></div>

 ## Index
- [Context](#Context)
- [Retry](#Retry)
- [RetryFunc](#RetryFunc)
- [RetryDuration](#RetryDuration)
- [RetryTimes](#RetryTimes)
+
+-   [Context](#Context)
+-   [Retry](#Retry)
+-   [RetryFunc](#RetryFunc)
+-   [RetryDuration](#RetryDuration)
+-   [RetryTimes](#RetryTimes)

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

 ## Documentation

-
 ### <span id="Context">Context</span>
+
 <p>Set retry context config, can cancel the retry with context.</p>

 <b>Signature:</b>
@@ -39,43 +41,46 @@ import (
 ```go
 func Context(ctx context.Context)
 ```
+
 <b>Example:</b>

 ```go
 import (
-	"context"
-	"errors"
-	"fmt"
-	"github.com/duke-git/lancet/v2/retry"
-	"time"
+    "context"
+    "errors"
+    "fmt"
+    "github.com/duke-git/lancet/v2/retry"
+    "time"
 )

 func main() {
-	ctx, cancel := context.WithCancel(context.TODO())
-	var number int
-	increaseNumber := func() error {
-		number++
-		if number > 3 {
-			cancel()
-		}
-		return errors.New("error occurs")
-	}
+    ctx, cancel := context.WithCancel(context.TODO())

-	err := retry.Retry(increaseNumber,
-		retry.RetryDuration(time.Microsecond*50),
-		retry.Context(ctx),
-	)
+    number := 0
+    increaseNumber := func() error {
+        number++
+        if number > 3 {
+            cancel()
+        }
+        return errors.New("error occurs")
+    }

-	if err != nil {
-		fmt.Println(err) //retry is cancelled
-	}
+    duration := retry.RetryDuration(time.Microsecond*50)
+
+    retry.Retry(increaseNumber,
+        duration,
+        retry.Context(ctx),
+    )
+
+    fmt.Println(number)
+
+    // Output:
+    // 4
 }
 ```

-
-
-
 ### <span id="RetryFunc">RetryFunc</span>
+
 <p>Function that retry executes.</p>

 <b>Signature:</b>
@@ -83,6 +88,7 @@ func main() {
 ```go
 type RetryFunc func() error
 ```
+
 <b>Example:</b>

 ```go
@@ -96,28 +102,31 @@ import (
 )

 func main() {
-    var number int
+    number := 0
+    var increaseNumber retry.RetryFunc = func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }

-	increaseNumber := func() error {
-		number++
-		if number == 3 {
-			return nil
-		}
-		return errors.New("error occurs")
-	}
+    duration := retry.RetryDuration(time.Microsecond*50)

-	err := retry.Retry(increaseNumber, retry.RetryDuration(time.Microsecond*50))
+    err := retry.Retry(increaseNumber, duration)
    if err != nil {
-		log.Fatal(err)
-	}
+        return
+    }

-    fmt.Println(number) //3
+    fmt.Println(number)
+
+    // Output:
+    // 3
 }
 ```

-
-
 ### <span id="RetryTimes">RetryTimes</span>
+
 <p>Set times of retry. Default times is 5.</p>

 <b>Signature:</b>
@@ -125,6 +134,7 @@ func main() {
 ```go
 func RetryTimes(n uint)
 ```
+
 <b>Example:</b>

 ```go
@@ -138,26 +148,28 @@ import (
 )

 func main() {
-    var number int
+    number := 0

-	increaseNumber := func() error {
-		number++
-		if number == 3 {
-			return nil
-		}
-		return errors.New("error occurs")
-	}
+    increaseNumber := func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }

-	err := retry.Retry(increaseNumber, retry.RetryTimes(2))
+    err := retry.Retry(increaseNumber, retry.RetryTimes(2))
    if err != nil {
-		log.Fatal(err) //2022/02/01 18:42:25 function main.main.func1 run failed after 2 times retry exit status 1
-	}
+        fmt.Println(err)
+    }
+
+    // Output:
+    // function main.main.func1 run failed after 2 times retry
 }
 ```

-
-
 ### <span id="RetryDuration">RetryDuration</span>
+
 <p>Set duration of retries. Default duration is 3 second.</p>

 <b>Signature:</b>
@@ -165,6 +177,7 @@ func main() {
 ```go
 func RetryDuration(d time.Duration)
 ```
+
 <b>Example:</b>

 ```go
@@ -178,26 +191,31 @@ import (
 )

 func main() {
-    var number int
-	increaseNumber := func() error {
-		number++
-		if number == 3 {
-			return nil
-		}
-		return errors.New("error occurs")
-	}
+    number := 0
+    increaseNumber := func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }

-	err := retry.Retry(increaseNumber, retry.RetryDuration(time.Microsecond*50))
+    duration := retry.RetryDuration(time.Microsecond*50)
+
+    err := retry.Retry(increaseNumber, duration)
    if err != nil {
-		log.Fatal(err)
-	}
+        return
+    }

-    fmt.Println(number) //3
+    fmt.Println(number)
+
+    // Output:
+    // 3
 }
 ```

-
 ### <span id="Retry">Retry</span>
+
 <p>Executes the retryFunc repeatedly until it was successful or canceled by the context.</p>

 <b>Signature:</b>
@@ -205,6 +223,7 @@ func main() {
 ```go
 func Retry(retryFunc RetryFunc, opts ...Option) error
 ```
+
 <b>Example:</b>

 ```go
@@ -218,20 +237,25 @@ import (
 )

 func main() {
-    var number int
-	increaseNumber := func() error {
-		number++
-		if number == 3 {
-			return nil
-		}
-		return errors.New("error occurs")
-	}
+    number := 0
+    increaseNumber := func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }

-	err := retry.Retry(increaseNumber, retry.RetryDuration(time.Microsecond*50))
+    duration := retry.RetryDuration(time.Microsecond*50)
+
+    err := retry.Retry(increaseNumber, duration)
    if err != nil {
-		log.Fatal(err)
-	}
+        return
+    }

-    fmt.Println(number) //3
+    fmt.Println(number)
+
+    // Output:
+    // 3
 }
 ```
--- a/docs/retry_zh-CN.md
+++ b/docs/retry_zh-CN.md
@@ -1,16 +1,17 @@
 # Retry
-retry重试执行函数直到函数运行成功或被context cancel。
+
+retry 重试执行函数直到函数运行成功或被 context cancel。

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

 ## 源码:

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

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

 ## 用法:
+
 ```go
 import (
    "github.com/duke-git/lancet/v2/retry"
@@ -20,20 +21,19 @@ import (
 <div STYLE="page-break-after: always;"></div>

 ## 目录
- [Context](#Context)
- [Retry](#Retry)
- [RetryFunc](#RetryFunc)
- [RetryDuration](#RetryDuration)
- [RetryTimes](#RetryTimes)

+-   [Context](#Context)
+-   [Retry](#Retry)
+-   [RetryFunc](#RetryFunc)
+-   [RetryDuration](#RetryDuration)
+-   [RetryTimes](#RetryTimes)

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

-
-## Document文档
-
+## Document 文档

 ### <span id="Context">Context</span>
+
 <p>设置重试context参数</p>

 <b>函数签名:</b>
@@ -41,43 +41,46 @@ import (
 ```go
 func Context(ctx context.Context)
 ```
-<b>例子:</b>
+
+<b>示例:</b>

 ```go
 import (
-	"context"
-	"errors"
-	"fmt"
-	"lancet-demo/retry"
-	"time"
+    "context"
+    "errors"
+    "fmt"
+    "lancet-demo/retry"
+    "time"
 )

 func main() {
-	ctx, cancel := context.WithCancel(context.TODO())
-	var number int
-	increaseNumber := func() error {
-		number++
-		if number > 3 {
-			cancel()
-		}
-		return errors.New("error occurs")
-	}
+    ctx, cancel := context.WithCancel(context.TODO())

-	err := retry.Retry(increaseNumber,
-		retry.RetryDuration(time.Microsecond*50),
-		retry.Context(ctx),
-	)
+    number := 0
+    increaseNumber := func() error {
+        number++
+        if number > 3 {
+            cancel()
+        }
+        return errors.New("error occurs")
+    }

-	if err != nil {
-		fmt.Println(err) //retry is cancelled
-	}
+    duration := retry.RetryDuration(time.Microsecond*50)
+
+    retry.Retry(increaseNumber,
+        duration,
+        retry.Context(ctx),
+    )
+
+    fmt.Println(number)
+
+    // Output:
+    // 4
 }
 ```

-
-
-
 ### <span id="RetryFunc">RetryFunc</span>
+
 <p>被重试执行的函数</p>

 <b>函数签名:</b>
@@ -85,7 +88,8 @@ func main() {
 ```go
 type RetryFunc func() error
 ```
-<b>例子:</b>
+
+<b>示例:</b>

 ```go
 package main
@@ -98,27 +102,31 @@ import (
 )

 func main() {
-    var number int
-	increaseNumber := func() error {
-		number++
-		if number == 3 {
-			return nil
-		}
-		return errors.New("error occurs")
-	}
+    number := 0
+    var increaseNumber retry.RetryFunc = func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }

-	err := retry.Retry(increaseNumber, retry.RetryDuration(time.Microsecond*50))
+    duration := retry.RetryDuration(time.Microsecond*50)
+
+    err := retry.Retry(increaseNumber, duration)
    if err != nil {
-		log.Fatal(err)
-	}
+        return
+    }

-    fmt.Println(number) //3
+    fmt.Println(number)
+
+    // Output:
+    // 3
 }
 ```

-
-
 ### <span id="RetryTimes">RetryTimes</span>
+
 <p>设置重试次数，默认5</p>

 <b>函数签名:</b>
@@ -126,7 +134,8 @@ func main() {
 ```go
 func RetryTimes(n uint)
 ```
-<b>例子:</b>
+
+<b>示例:</b>

 ```go
 package main
@@ -139,25 +148,28 @@ import (
 )

 func main() {
-    var number int
-	increaseNumber := func() error {
-		number++
-		if number == 3 {
-			return nil
-		}
-		return errors.New("error occurs")
-	}
+    number := 0

-	err := retry.Retry(increaseNumber, retry.RetryTimes(2))
+    increaseNumber := func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }
+
+    err := retry.Retry(increaseNumber, retry.RetryTimes(2))
    if err != nil {
-		log.Fatal(err) //2022/02/01 18:42:25 function main.main.func1 run failed after 2 times retry exit status 1
-	}
+        fmt.Println(err)
+    }
+
+    // Output:
+    // function main.main.func1 run failed after 2 times retry
 }
 ```

-
-
 ### <span id="RetryDuration">RetryDuration</span>
+
 <p>设置重试间隔时间，默认3秒</p>

 <b>函数签名:</b>
@@ -165,7 +177,8 @@ func main() {
 ```go
 func RetryDuration(d time.Duration)
 ```
-<b>例子:</b>
+
+<b>示例:</b>

 ```go
 package main
@@ -178,26 +191,31 @@ import (
 )

 func main() {
-    var number int
-	increaseNumber := func() error {
-		number++
-		if number == 3 {
-			return nil
-		}
-		return errors.New("error occurs")
-	}
+    number := 0
+    increaseNumber := func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }

-	err := retry.Retry(increaseNumber, retry.RetryDuration(time.Microsecond*50))
+    duration := retry.RetryDuration(time.Microsecond*50)
+
+    err := retry.Retry(increaseNumber, duration)
    if err != nil {
-		log.Fatal(err)
-	}
+        return
+    }

-    fmt.Println(number) //3
+    fmt.Println(number)
+
+    // Output:
+    // 3
 }
 ```

-
 ### <span id="Retry">Retry</span>
+
 <p>重试执行函数retryFunc，直到函数运行成功，或被context停止</p>

 <b>函数签名:</b>
@@ -205,7 +223,8 @@ func main() {
 ```go
 func Retry(retryFunc RetryFunc, opts ...Option) error
 ```
-<b>例子:</b>
+
+<b>示例:</b>

 ```go
 package main
@@ -218,20 +237,25 @@ import (
 )

 func main() {
-    var number int
-	increaseNumber := func() error {
-		number++
-		if number == 3 {
-			return nil
-		}
-		return errors.New("error occurs")
-	}
+    number := 0
+    increaseNumber := func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }

-	err := retry.Retry(increaseNumber, retry.RetryDuration(time.Microsecond*50))
+    duration := retry.RetryDuration(time.Microsecond*50)
+
+    err := retry.Retry(increaseNumber, duration)
    if err != nil {
-		log.Fatal(err)
-	}
+        return
+    }

-    fmt.Println(number) //3
+    fmt.Println(number)
+
+    // Output:
+    // 3
 }
 ```
--- a/docs/slice.md
+++ b/docs/slice.md
--- a/docs/slice_zh-CN.md
+++ b/docs/slice_zh-CN.md
--- a/docs/strutil.md
+++ b/docs/strutil.md
--- a/docs/strutil_zh-CN.md
+++ b/docs/strutil_zh-CN.md
--- a/docs/system.md
+++ b/docs/system.md
@@ -1,16 +1,17 @@
 # System
+
 Package system contains some functions about os, runtime, shell command.

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

 ## Source:

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

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

 ## Usage:
+
 ```go
 import (
    "github.com/duke-git/lancet/v2/system"
@@ -20,23 +21,23 @@ import (
 <div STYLE="page-break-after: always;"></div>

 ## Index
- [IsWindows](#IsWindows)
- [IsLinux](#IsLinux)
- [IsMac](#IsMac)
- [GetOsEnv](#GetOsEnv)
- [SetOsEnv](#SetOsEnv)
- [RemoveOsEnv](#RemoveOsEnv)
- [CompareOsEnv](#CompareOsEnv)
- [ExecCommand](#ExecCommand)
- [GetOsBits](#GetOsBits)
-  
+
+-   [IsWindows](#IsWindows)
+-   [IsLinux](#IsLinux)
+-   [IsMac](#IsMac)
+-   [GetOsEnv](#GetOsEnv)
+-   [SetOsEnv](#SetOsEnv)
+-   [RemoveOsEnv](#RemoveOsEnv)
+-   [CompareOsEnv](#CompareOsEnv)
+-   [ExecCommand](#ExecCommand)
+-   [GetOsBits](#GetOsBits)

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

 ## Documentation

-
 ### <span id="IsWindows">IsWindows</span>
+
 <p>Check if current os is windows.</p>

 <b>Signature:</b>
@@ -44,24 +45,23 @@ import (
 ```go
 func IsWindows() bool
 ```
+
 <b>Example:</b>

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

 func main() {
-	isOsWindows := system.IsWindows()
-	fmt.Println(isOsWindows)
+    isOsWindows := system.IsWindows()
+    fmt.Println(isOsWindows)
 }
 ```

-
-
-
 ### <span id="IsLinux">IsLinux</span>
+
 <p>Check if current os is linux.</p>

 <b>Signature:</b>
@@ -69,23 +69,23 @@ func main() {
 ```go
 func IsLinux() bool
 ```
+
 <b>Example:</b>

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

 func main() {
-	isOsLinux := system.IsLinux()
-	fmt.Println(isOsLinux)
+    isOsLinux := system.IsLinux()
+    fmt.Println(isOsLinux)
 }
 ```

-
-
 ### <span id="IsMac">IsMac</span>
+
 <p>Check if current os is macos.</p>

 <b>Signature:</b>
@@ -93,23 +93,23 @@ func main() {
 ```go
 func IsMac() bool
 ```
+
 <b>Example:</b>

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

 func main() {
-	isOsMac := system.IsMac()
-	fmt.Println(isOsMac)
+    isOsMac := system.IsMac()
+    fmt.Println(isOsMac)
 }
 ```

-
-
 ### <span id="GetOsEnv">GetOsEnv</span>
+
 <p>Gets the value of the environment variable named by the key.</p>

 <b>Signature:</b>
@@ -117,23 +117,29 @@ func main() {
 ```go
 func GetOsEnv(key string) string
 ```
+
 <b>Example:</b>

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

 func main() {
-	fooEnv := system.GetOsEnv("foo")
-	fmt.Println(fooEnv)
+    err := system.SetOsEnv("foo", "abc")
+    result := system.GetOsEnv("foo")
+
+    fmt.Println(err)
+    fmt.Println(result)
+    // Output:
+    // <nil>
+    // abc
 }
 ```

-
-
 ### <span id="SetOsEnv">SetOsEnv</span>
+
 <p>Sets the value of the environment variable named by the key.</p>

 <b>Signature:</b>
@@ -141,24 +147,29 @@ func main() {
 ```go
 func SetOsEnv(key, value string) error
 ```
+
 <b>Example:</b>

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

 func main() {
-	err := system.SetOsEnv("foo", "foo_value")
-	fmt.Println(err)
+    err := system.SetOsEnv("foo", "abc")
+    result := system.GetOsEnv("foo")
+
+    fmt.Println(err)
+    fmt.Println(result)
+    // Output:
+    // <nil>
+    // abc
 }
 ```

-
-
-
 ### <span id="RemoveOsEnv">RemoveOsEnv</span>
+
 <p>Remove a single environment variable.</p>

 <b>Signature:</b>
@@ -166,25 +177,37 @@ func main() {
 ```go
 func RemoveOsEnv(key string) error
 ```
+
 <b>Example:</b>

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

 func main() {
-	err := system.RemoveOsEnv("foo")
-	if err != nil {
-		fmt.Println(err)
-	}
+    err1 := system.SetOsEnv("foo", "abc")
+    result1 := GetOsEnv("foo")
+
+    err2 := system.RemoveOsEnv("foo")
+    result2 := GetOsEnv("foo")
+
+    fmt.Println(err1)
+    fmt.Println(err2)
+    fmt.Println(result1)
+    fmt.Println(result2)
+
+    // Output:
+    // <nil>
+    // <nil>
+    // abc
+    //
 }
 ```

-
-
 ### <span id="CompareOsEnv">CompareOsEnv</span>
+
 <p>Get env named by the key and compare it with comparedEnv.</p>

 <b>Signature:</b>
@@ -192,25 +215,32 @@ func main() {
 ```go
 func CompareOsEnv(key, comparedEnv string) bool
 ```
+
 <b>Example:</b>

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

 func main() {
-	system.SetOsEnv("foo", "foo_value")
-	res := system.CompareOsEnv("foo", "foo_value")
-	fmt.Println(res) //true
+    err := system.SetOsEnv("foo", "abc")
+    if err != nil {
+        return
+    }
+
+    result := system.CompareOsEnv("foo", "abc")
+
+    fmt.Println(result)
+
+    // Output:
+    // true
 }
 ```

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

 <b>Signature:</b>
@@ -218,40 +248,39 @@ func main() {
 ```go
 func ExecCommand(command string) (stdout, stderr string, err error)
 ```
+
 <b>Example:</b>

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

 func main() {
-	// linux or mac
-	stdout, stderr, err := system.ExecCommand("ls")
-	fmt.Println("std out: ", stdout)
-	fmt.Println("std err: ", stderr)
-	assert.Equal("", stderr)
+    // linux or mac
+    stdout, stderr, err := system.ExecCommand("ls")
+    fmt.Println("std out: ", stdout)
+    fmt.Println("std err: ", stderr)
+    assert.Equal("", stderr)

-	// windows
-	stdout, stderr, err = system.ExecCommand("dir")
-	fmt.Println("std out: ", stdout)
-	fmt.Println("std err: ", stderr)
+    // windows
+    stdout, stderr, err = system.ExecCommand("dir")
+    fmt.Println("std out: ", stdout)
+    fmt.Println("std err: ", stderr)

-	// error command
-	stdout, stderr, err = system.ExecCommand("abc")
-	fmt.Println("std out: ", stdout)
-	fmt.Println("std err: ", stderr)
-	if err != nil {
-		fmt.Println(err.Error())
-	}
+    // error command
+    stdout, stderr, err = system.ExecCommand("abc")
+    fmt.Println("std out: ", stdout)
+    fmt.Println("std err: ", stderr)
+    if err != nil {
+        fmt.Println(err.Error())
+    }
 }
 ```

-
-
-
 ### <span id="GetOsBits">GetOsBits</span>
+
 <p>Get current os bits, 32bit or 64bit. return 32 or 64</p>

 <b>Signature:</b>
@@ -259,19 +288,17 @@ func main() {
 ```go
 func GetOsBits() int
 ```
+
 <b>Example:</b>

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

 func main() {
-	osBit := system.GetOsBits()
-	fmt.Println(osBit) 
+    osBit := system.GetOsBits()
+    fmt.Println(osBit) // 32 or 64
 }
 ```
-
-
-
--- a/docs/system_zh-CN.md
+++ b/docs/system_zh-CN.md
@@ -1,16 +1,17 @@
 # System
-system包含os, runtime, shell command相关函数。
+
+system 包含 os, runtime, shell command 相关函数。

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

 ## 源码:

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

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

 ## 用法:
+
 ```go
 import (
    "github.com/duke-git/lancet/v2/system"
@@ -20,23 +21,23 @@ import (
 <div STYLE="page-break-after: always;"></div>

 ## 目录
- [IsWindows](#IsWindows)
- [IsLinux](#IsLinux)
- [IsMac](#IsMac)
- [GetOsEnv](#GetOsEnv)
- [SetOsEnv](#SetOsEnv)
- [RemoveOsEnv](#RemoveOsEnv)
- [CompareOsEnv](#CompareOsEnv)
- [ExecCommand](#ExecCommand)
- [GetOsBits](#GetOsBits)
-  
+
+-   [IsWindows](#IsWindows)
+-   [IsLinux](#IsLinux)
+-   [IsMac](#IsMac)
+-   [GetOsEnv](#GetOsEnv)
+-   [SetOsEnv](#SetOsEnv)
+-   [RemoveOsEnv](#RemoveOsEnv)
+-   [CompareOsEnv](#CompareOsEnv)
+-   [ExecCommand](#ExecCommand)
+-   [GetOsBits](#GetOsBits)

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

-## Documentation文档
-
+## Documentation 文档

 ### <span id="IsWindows">IsWindows</span>
+
 <p>检查当前操作系统是否是windows</p>

 <b>Signature:</b>
@@ -44,24 +45,23 @@ import (
 ```go
 func IsWindows() bool
 ```
+
 <b>Example:</b>

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

 func main() {
-	isOsWindows := system.IsWindows()
-	fmt.Println(isOsWindows)
+    isOsWindows := system.IsWindows()
+    fmt.Println(isOsWindows)
 }
 ```

-
-
-
 ### <span id="IsLinux">IsLinux</span>
+
 <p>检查当前操作系统是否是linux</p>

 <b>Signature:</b>
@@ -69,23 +69,23 @@ func main() {
 ```go
 func IsLinux() bool
 ```
+
 <b>Example:</b>

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

 func main() {
-	isOsLinux := system.IsLinux()
-	fmt.Println(isOsLinux)
+    isOsLinux := system.IsLinux()
+    fmt.Println(isOsLinux)
 }
 ```

-
-
 ### <span id="IsMac">IsMac</span>
+
 <p>检查当前操作系统是否是macos</p>

 <b>Signature:</b>
@@ -93,23 +93,23 @@ func main() {
 ```go
 func IsMac() bool
 ```
+
 <b>Example:</b>

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

 func main() {
-	isOsMac := system.IsMac()
-	fmt.Println(isOsMac)
+    isOsMac := system.IsMac()
+    fmt.Println(isOsMac)
 }
 ```

-
-
 ### <span id="GetOsEnv">GetOsEnv</span>
+
 <p>获取key命名的环境变量的值</p>

 <b>Signature:</b>
@@ -117,23 +117,29 @@ func main() {
 ```go
 func GetOsEnv(key string) string
 ```
+
 <b>Example:</b>

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

 func main() {
-	fooEnv := system.GetOsEnv("foo")
-	fmt.Println(fooEnv)
+    err := system.SetOsEnv("foo", "abc")
+    result := system.GetOsEnv("foo")
+
+    fmt.Println(err)
+    fmt.Println(result)
+    // Output:
+    // <nil>
+    // abc
 }
 ```

-
-
 ### <span id="SetOsEnv">SetOsEnv</span>
+
 <p>设置由key命名的环境变量的值</p>

 <b>Signature:</b>
@@ -141,24 +147,29 @@ func main() {
 ```go
 func SetOsEnv(key, value string) error
 ```
+
 <b>Example:</b>

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

 func main() {
-	err := system.SetOsEnv("foo", "foo_value")
-	fmt.Println(err)
+    err := system.SetOsEnv("foo", "abc")
+    result := system.GetOsEnv("foo")
+
+    fmt.Println(err)
+    fmt.Println(result)
+    // Output:
+    // <nil>
+    // abc
 }
 ```

-
-
-
 ### <span id="RemoveOsEnv">RemoveOsEnv</span>
+
 <p>删除单个环境变量</p>

 <b>Signature:</b>
@@ -166,25 +177,37 @@ func main() {
 ```go
 func RemoveOsEnv(key string) error
 ```
+
 <b>Example:</b>

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

 func main() {
-	err := system.RemoveOsEnv("foo")
-	if err != nil {
-		fmt.Println(err)
-	}
+    err1 := system.SetOsEnv("foo", "abc")
+    result1 := GetOsEnv("foo")
+
+    err2 := system.RemoveOsEnv("foo")
+    result2 := GetOsEnv("foo")
+
+    fmt.Println(err1)
+    fmt.Println(err2)
+    fmt.Println(result1)
+    fmt.Println(result2)
+
+    // Output:
+    // <nil>
+    // <nil>
+    // abc
+    //
 }
 ```

-
-
 ### <span id="CompareOsEnv">CompareOsEnv</span>
+
 <p>获取key命名的环境变量值并与compareEnv进行比较</p>

 <b>Signature:</b>
@@ -192,25 +215,32 @@ func main() {
 ```go
 func CompareOsEnv(key, comparedEnv string) bool
 ```
+
 <b>Example:</b>

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

 func main() {
-	system.SetOsEnv("foo", "foo_value")
-	res := system.CompareOsEnv("foo", "foo_value")
-	fmt.Println(res) //true
+    err := system.SetOsEnv("foo", "abc")
+    if err != nil {
+        return
+    }
+
+    result := system.CompareOsEnv("foo", "abc")
+
+    fmt.Println(result)
+
+    // Output:
+    // true
 }
 ```

-
-
-
 ### <span id="ExecCommand">ExecCommand</span>
+
 <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>
@@ -218,40 +248,39 @@ func main() {
 ```go
 func ExecCommand(command string) (stdout, stderr string, err error)
 ```
+
 <b>Example:</b>

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

 func main() {
-	// linux or mac
-	stdout, stderr, err := system.ExecCommand("ls")
-	fmt.Println("std out: ", stdout)
-	fmt.Println("std err: ", stderr)
-	assert.Equal("", stderr)
+    // linux or mac
+    stdout, stderr, err := system.ExecCommand("ls")
+    fmt.Println("std out: ", stdout)
+    fmt.Println("std err: ", stderr)
+    assert.Equal("", stderr)

-	// windows
-	stdout, stderr, err = system.ExecCommand("dir")
-	fmt.Println("std out: ", stdout)
-	fmt.Println("std err: ", stderr)
+    // windows
+    stdout, stderr, err = system.ExecCommand("dir")
+    fmt.Println("std out: ", stdout)
+    fmt.Println("std err: ", stderr)

-	// error command
-	stdout, stderr, err = system.ExecCommand("abc")
-	fmt.Println("std out: ", stdout)
-	fmt.Println("std err: ", stderr)
-	if err != nil {
-		fmt.Println(err.Error())
-	}
+    // error command
+    stdout, stderr, err = system.ExecCommand("abc")
+    fmt.Println("std out: ", stdout)
+    fmt.Println("std err: ", stderr)
+    if err != nil {
+        fmt.Println(err.Error())
+    }
 }
 ```

-
-
-
 ### <span id="GetOsBits">GetOsBits</span>
+
 <p>获取当前操作系统位数，返回32或64</p>

 <b>函数签名:</b>
@@ -259,23 +288,17 @@ func main() {
 ```go
 func GetOsBits() int
 ```
-<b>例子:</b>
+
+<b>示例:</b>

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

 func main() {
-	osBit := system.GetOsBits()
-	fmt.Println(osBit) 
+    osBit := system.GetOsBits()
+    fmt.Println(osBit) // 32 or 64
 }
 ```
-
-
-
-
-
-
-
--- a/docs/validator.md
+++ b/docs/validator.md
--- a/docs/validator_zh-CN.md
+++ b/docs/validator_zh-CN.md
--- a/docs/xerror.md
+++ b/docs/xerror.md
@@ -1,15 +1,17 @@
 # Xerror
+
 Package xerror implements helpers for errors.

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

 ## Source:

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

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

 ## Usage:
+
 ```go
 import (
    "github.com/duke-git/lancet/v2/xerror"
@@ -19,15 +21,15 @@ import (
 <div STYLE="page-break-after: always;"></div>

 ## Index
- [Unwrap](#Unwrap)
+
+-   [Unwrap](#Unwrap)

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

 ## Documentation

-
-
 ### <span id="Unwrap">Unwrap</span>
+
 <p>Unwrap if err is nil then it returns a valid value. If err is not nil, Unwrap panics with err.</p>

 <b>Signature:</b>
@@ -35,6 +37,7 @@ import (
 ```go
 func Unwrap[T any](val T, err error) T
 ```
+
 <b>Example:</b>

 ```go
@@ -46,20 +49,20 @@ import (
 )

 func main() {
-	result1 := xerror.Unwrap(strconv.Atoi("42"))
-	fmt.Println(result1)
+    result1 := xerror.Unwrap(strconv.Atoi("42"))
+    fmt.Println(result1)

-	_, err := strconv.Atoi("4o2")
-	defer func() {
-		v := recover()
-		result2 := reflect.DeepEqual(err.Error(), v.(*strconv.NumError).Error())
-		fmt.Println(result2)
-	}()
+    _, err := strconv.Atoi("4o2")
+    defer func() {
+        v := recover()
+        result2 := reflect.DeepEqual(err.Error(), v.(*strconv.NumError).Error())
+        fmt.Println(result2)
+    }()

-	xerror.Unwrap(strconv.Atoi("4o2"))
+    xerror.Unwrap(strconv.Atoi("4o2"))

-	// Output:
-	// 42
-	// true
+    // Output:
+    // 42
+    // true
 }
 ```
--- a/docs/xerror_zh-CN.md
+++ b/docs/xerror_zh-CN.md
@@ -1,15 +1,17 @@
 # Xerror
-xerror错误处理逻辑封装
+
+xerror 错误处理逻辑封装

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

 ## 源码:

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

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

 ## 用法:
+
 ```go
 import (
    "github.com/duke-git/lancet/v2/xerror"
@@ -19,15 +21,15 @@ import (
 <div STYLE="page-break-after: always;"></div>

 ## 目录
- [Unwrap](#Unwrap)
+
+-   [Unwrap](#Unwrap)

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

 ## 文档

-
-
 ### <span id="Unwrap">Unwrap</span>
+
 <p>检查error, 如果err为nil则展开，则它返回一个有效值，如果err不是nil则Unwrap使用err发生panic。</p>

 <b>函数签名:</b>
@@ -35,7 +37,8 @@ import (
 ```go
 func Unwrap[T any](val T, err error) T
 ```
-<b>例子:</b>
+
+<b>示例:</b>

 ```go
 package main
@@ -46,20 +49,20 @@ import (
 )

 func main() {
-	result1 := xerror.Unwrap(strconv.Atoi("42"))
-	fmt.Println(result1)
+    result1 := xerror.Unwrap(strconv.Atoi("42"))
+    fmt.Println(result1)

-	_, err := strconv.Atoi("4o2")
-	defer func() {
-		v := recover()
-		result2 := reflect.DeepEqual(err.Error(), v.(*strconv.NumError).Error())
-		fmt.Println(result2)
-	}()
+    _, err := strconv.Atoi("4o2")
+    defer func() {
+        v := recover()
+        result2 := reflect.DeepEqual(err.Error(), v.(*strconv.NumError).Error())
+        fmt.Println(result2)
+    }()

-	xerror.Unwrap(strconv.Atoi("4o2"))
+    xerror.Unwrap(strconv.Atoi("4o2"))

-	// Output:
-	// 42
-	// true
+    // Output:
+    // 42
+    // true
 }
 ```
--- a/netutil/http.go
+++ b/netutil/http.go
@@ -13,12 +13,21 @@
 package netutil

 import (
+	"bytes"
+	"crypto/tls"
 	"encoding/json"
 	"errors"
 	"fmt"
+	"io"
 	"net/http"
+	"net/url"
+	"reflect"
+	"regexp"
 	"sort"
 	"strings"
+	"time"
+
+	"github.com/duke-git/lancet/v2/slice"
 )

 // HttpGet send get http request.
@@ -78,3 +87,220 @@ func ConvertMapToQueryString(param map[string]any) string {
 	}
 	return build.String()
 }
+
+// HttpRequest struct is a composed http request
+type HttpRequest struct {
+	RawURL      string
+	Method      string
+	Headers     http.Header
+	QueryParams url.Values
+	FormData    url.Values
+	Body        []byte
+}
+
+// HttpClientConfig contains some configurations for http client
+type HttpClientConfig struct {
+	SSLEnabled       bool
+	TLSConfig        *tls.Config
+	Compressed       bool
+	HandshakeTimeout time.Duration
+	ResponseTimeout  time.Duration
+	Verbose          bool
+}
+
+// defaultHttpClientConfig defalut client config
+var defaultHttpClientConfig = &HttpClientConfig{
+	Compressed:       false,
+	HandshakeTimeout: 20 * time.Second,
+	ResponseTimeout:  40 * time.Second,
+}
+
+// HttpClient is used for sending http request
+type HttpClient struct {
+	*http.Client
+	TLS     *tls.Config
+	Request *http.Request
+	Config  HttpClientConfig
+}
+
+// NewHttpClient make a HttpClient instance
+func NewHttpClient() *HttpClient {
+	client := &HttpClient{
+		Client: &http.Client{
+			Transport: &http.Transport{
+				TLSHandshakeTimeout:   defaultHttpClientConfig.HandshakeTimeout,
+				ResponseHeaderTimeout: defaultHttpClientConfig.ResponseTimeout,
+				DisableCompression:    !defaultHttpClientConfig.Compressed,
+			},
+		},
+		Config: *defaultHttpClientConfig,
+	}
+
+	return client
+}
+
+// NewHttpClientWithConfig make a HttpClient instance with pass config
+func NewHttpClientWithConfig(config *HttpClientConfig) *HttpClient {
+	if config == nil {
+		config = defaultHttpClientConfig
+	}
+
+	client := &HttpClient{
+		Client: &http.Client{
+			Transport: &http.Transport{
+				TLSHandshakeTimeout:   config.HandshakeTimeout,
+				ResponseHeaderTimeout: config.ResponseTimeout,
+				DisableCompression:    !config.Compressed,
+			},
+		},
+		Config: *config,
+	}
+
+	if config.SSLEnabled {
+		client.TLS = config.TLSConfig
+	}
+
+	return client
+}
+
+// SendRequest send http request.
+// Play: https://go.dev/play/p/jUSgynekH7G
+func (client *HttpClient) SendRequest(request *HttpRequest) (*http.Response, error) {
+	err := validateRequest(request)
+	if err != nil {
+		return nil, err
+	}
+
+	rawUrl := request.RawURL
+
+	req, err := http.NewRequest(request.Method, rawUrl, bytes.NewBuffer(request.Body))
+	if err != nil {
+		return nil, err
+	}
+
+	client.setTLS(rawUrl)
+	client.setHeader(req, request.Headers)
+
+	err = client.setQueryParam(req, rawUrl, request.QueryParams)
+	if err != nil {
+		return nil, err
+	}
+
+	if request.FormData != nil {
+		client.setFormData(req, request.FormData)
+	}
+
+	client.Request = req
+
+	resp, err := client.Client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp, nil
+}
+
+// DecodeResponse decode response into target object.
+// Play: https://go.dev/play/p/jUSgynekH7G
+func (client *HttpClient) DecodeResponse(resp *http.Response, target any) error {
+	if resp == nil {
+		return errors.New("invalid target param")
+	}
+	defer resp.Body.Close()
+	return json.NewDecoder(resp.Body).Decode(target)
+}
+
+// setTLS set http client transport TLSClientConfig
+func (client *HttpClient) setTLS(rawUrl string) {
+	if strings.HasPrefix(rawUrl, "https") {
+		if transport, ok := client.Client.Transport.(*http.Transport); ok {
+			transport.TLSClientConfig = client.TLS
+		}
+	}
+}
+
+// setHeader set http rquest header
+func (client *HttpClient) setHeader(req *http.Request, headers http.Header) {
+	if headers == nil {
+		headers = make(http.Header)
+	}
+
+	if _, ok := headers["Accept"]; !ok {
+		headers["Accept"] = []string{"*/*"}
+	}
+	if _, ok := headers["Accept-Encoding"]; !ok && client.Config.Compressed {
+		headers["Accept-Encoding"] = []string{"deflate, gzip"}
+	}
+
+	req.Header = headers
+}
+
+// setQueryParam set http request query string param
+func (client *HttpClient) setQueryParam(req *http.Request, reqUrl string, queryParam url.Values) error {
+	if queryParam != nil {
+		if !strings.Contains(reqUrl, "?") {
+			reqUrl = reqUrl + "?" + queryParam.Encode()
+		} else {
+			reqUrl = reqUrl + "&" + queryParam.Encode()
+		}
+		u, err := url.Parse(reqUrl)
+		if err != nil {
+			return err
+		}
+		req.URL = u
+	}
+	return nil
+}
+
+func (client *HttpClient) setFormData(req *http.Request, values url.Values) {
+	formData := []byte(values.Encode())
+	req.Body = io.NopCloser(bytes.NewReader(formData))
+	req.ContentLength = int64(len(formData))
+}
+
+// validateRequest check if a request has url, and valid method.
+func validateRequest(req *HttpRequest) error {
+	if req.RawURL == "" {
+		return errors.New("invalid request url")
+	}
+
+	// common HTTP methods
+	methods := []string{"GET", "POST", "PUT", "DELETE", "PATCH",
+		"HEAD", "CONNECT", "OPTIONS", "TRACE"}
+
+	if !slice.Contain(methods, strings.ToUpper(req.Method)) {
+		return errors.New("invalid request method")
+	}
+
+	return nil
+}
+
+// StructToUrlValues convert struct to url valuse,
+// only convert the field which is exported and has `json` tag.
+// Play: https://go.dev/play/p/pFqMkM40w9z
+func StructToUrlValues(targetStruct any) url.Values {
+	rv := reflect.ValueOf(targetStruct)
+	rt := reflect.TypeOf(targetStruct)
+
+	if rt.Kind() == reflect.Ptr {
+		rt = rt.Elem()
+	}
+	if rt.Kind() != reflect.Struct {
+		panic(fmt.Errorf("data type %T not support, shuld be struct or pointer to struct", targetStruct))
+	}
+
+	result := url.Values{}
+
+	fieldNum := rt.NumField()
+	pattern := `^[A-Z]`
+	regex := regexp.MustCompile(pattern)
+	for i := 0; i < fieldNum; i++ {
+		name := rt.Field(i).Name
+		tag := rt.Field(i).Tag.Get("json")
+		if regex.MatchString(name) && tag != "" {
+			result.Add(tag, fmt.Sprintf("%v", rv.Field(i).Interface()))
+		}
+	}
+
+	return result
+}
--- a/netutil/http_client.go
+++ b/netutil/http_client.go
@@ -1,235 +0,0 @@
-package netutil
-
-import (
-	"bytes"
-	"crypto/tls"
-	"encoding/json"
-	"errors"
-	"fmt"
-	"io"
-	"net/http"
-	"net/url"
-	"reflect"
-	"regexp"
-	"strings"
-	"time"
-
-	"github.com/duke-git/lancet/v2/slice"
-)
-
-// HttpRequest struct is a composed http request
-type HttpRequest struct {
-	RawURL      string
-	Method      string
-	Headers     http.Header
-	QueryParams url.Values
-	FormData    url.Values
-	Body        []byte
-}
-
-// HttpClientConfig contains some configurations for http client
-type HttpClientConfig struct {
-	SSLEnabled       bool
-	TLSConfig        *tls.Config
-	Compressed       bool
-	HandshakeTimeout time.Duration
-	ResponseTimeout  time.Duration
-	Verbose          bool
-}
-
-// defaultHttpClientConfig defalut client config
-var defaultHttpClientConfig = &HttpClientConfig{
-	Compressed:       false,
-	HandshakeTimeout: 20 * time.Second,
-	ResponseTimeout:  40 * time.Second,
-}
-
-// HttpClient is used for sending http request
-type HttpClient struct {
-	*http.Client
-	TLS     *tls.Config
-	Request *http.Request
-	Config  HttpClientConfig
-}
-
-// NewHttpClient make a HttpClient instance
-func NewHttpClient() *HttpClient {
-	client := &HttpClient{
-		Client: &http.Client{
-			Transport: &http.Transport{
-				TLSHandshakeTimeout:   defaultHttpClientConfig.HandshakeTimeout,
-				ResponseHeaderTimeout: defaultHttpClientConfig.ResponseTimeout,
-				DisableCompression:    !defaultHttpClientConfig.Compressed,
-			},
-		},
-		Config: *defaultHttpClientConfig,
-	}
-
-	return client
-}
-
-// NewHttpClientWithConfig make a HttpClient instance with pass config
-func NewHttpClientWithConfig(config *HttpClientConfig) *HttpClient {
-	if config == nil {
-		config = defaultHttpClientConfig
-	}
-
-	client := &HttpClient{
-		Client: &http.Client{
-			Transport: &http.Transport{
-				TLSHandshakeTimeout:   config.HandshakeTimeout,
-				ResponseHeaderTimeout: config.ResponseTimeout,
-				DisableCompression:    !config.Compressed,
-			},
-		},
-		Config: *config,
-	}
-
-	if config.SSLEnabled {
-		client.TLS = config.TLSConfig
-	}
-
-	return client
-}
-
-// SendRequest send http request.
-// Play: https://go.dev/play/p/jUSgynekH7G
-func (client *HttpClient) SendRequest(request *HttpRequest) (*http.Response, error) {
-	err := validateRequest(request)
-	if err != nil {
-		return nil, err
-	}
-
-	rawUrl := request.RawURL
-
-	req, err := http.NewRequest(request.Method, rawUrl, bytes.NewBuffer(request.Body))
-	if err != nil {
-		return nil, err
-	}
-
-	client.setTLS(rawUrl)
-	client.setHeader(req, request.Headers)
-
-	err = client.setQueryParam(req, rawUrl, request.QueryParams)
-	if err != nil {
-		return nil, err
-	}
-
-	if request.FormData != nil {
-		client.setFormData(req, request.FormData)
-	}
-
-	client.Request = req
-
-	resp, err := client.Client.Do(req)
-	if err != nil {
-		return nil, err
-	}
-
-	return resp, nil
-}
-
-// DecodeResponse decode response into target object.
-// Play: https://go.dev/play/p/jUSgynekH7G
-func (client *HttpClient) DecodeResponse(resp *http.Response, target any) error {
-	if resp == nil {
-		return errors.New("invalid target param")
-	}
-	defer resp.Body.Close()
-	return json.NewDecoder(resp.Body).Decode(target)
-}
-
-// setTLS set http client transport TLSClientConfig
-func (client *HttpClient) setTLS(rawUrl string) {
-	if strings.HasPrefix(rawUrl, "https") {
-		if transport, ok := client.Client.Transport.(*http.Transport); ok {
-			transport.TLSClientConfig = client.TLS
-		}
-	}
-}
-
-// setHeader set http rquest header
-func (client *HttpClient) setHeader(req *http.Request, headers http.Header) {
-	if headers == nil {
-		headers = make(http.Header)
-	}
-
-	if _, ok := headers["Accept"]; !ok {
-		headers["Accept"] = []string{"*/*"}
-	}
-	if _, ok := headers["Accept-Encoding"]; !ok && client.Config.Compressed {
-		headers["Accept-Encoding"] = []string{"deflate, gzip"}
-	}
-
-	req.Header = headers
-}
-
-// setQueryParam set http request query string param
-func (client *HttpClient) setQueryParam(req *http.Request, reqUrl string, queryParam url.Values) error {
-	if queryParam != nil {
-		if !strings.Contains(reqUrl, "?") {
-			reqUrl = reqUrl + "?" + queryParam.Encode()
-		} else {
-			reqUrl = reqUrl + "&" + queryParam.Encode()
-		}
-		u, err := url.Parse(reqUrl)
-		if err != nil {
-			return err
-		}
-		req.URL = u
-	}
-	return nil
-}
-
-func (client *HttpClient) setFormData(req *http.Request, values url.Values) {
-	formData := []byte(values.Encode())
-	req.Body = io.NopCloser(bytes.NewReader(formData))
-	req.ContentLength = int64(len(formData))
-}
-
-// validateRequest check if a request has url, and valid method.
-func validateRequest(req *HttpRequest) error {
-	if req.RawURL == "" {
-		return errors.New("invalid request url")
-	}
-
-	// common HTTP methods
-	methods := []string{"GET", "POST", "PUT", "DELETE", "PATCH",
-		"HEAD", "CONNECT", "OPTIONS", "TRACE"}
-
-	if !slice.Contain(methods, strings.ToUpper(req.Method)) {
-		return errors.New("invalid request method")
-	}
-
-	return nil
-}
-
-// StructToUrlValues convert struct to url valuse,
-// only convert the field which is exported and has `json` tag.
-// Play: https://go.dev/play/p/pFqMkM40w9z
-func StructToUrlValues(targetStruct any) url.Values {
-	rv := reflect.ValueOf(targetStruct)
-	rt := reflect.TypeOf(targetStruct)
-
-	if rt.Kind() == reflect.Ptr {
-		rt = rt.Elem()
-	}
-	if rt.Kind() != reflect.Struct {
-		panic(fmt.Errorf("data type %T not support, shuld be struct or pointer to struct", targetStruct))
-	}
-
-	result := url.Values{}
-
-	fieldNum := rt.NumField()
-	pattern := `^[A-Z]`
-	regex := regexp.MustCompile(pattern)
-	for i := 0; i < fieldNum; i++ {
-		name := rt.Field(i).Name
-		tag := rt.Field(i).Tag.Get("json")
-		if regex.MatchString(name) && tag != "" {
-			result.Add(tag, fmt.Sprintf("%v", rv.Field(i).Interface()))
-		}
-	}
-
-	return result
-}
--- a/netutil/http_client_test.go
+++ b/netutil/http_client_test.go
@@ -1,98 +0,0 @@
-package netutil
-
-import (
-	"io"
-	"log"
-	"net/http"
-	"net/url"
-	"testing"
-
-	"github.com/duke-git/lancet/v2/internal"
-)
-
-func TestHttpClient_Get(t *testing.T) {
-	assert := internal.NewAssert(t, "TestHttpClient_Get")
-
-	request := &HttpRequest{
-		RawURL: "https://jsonplaceholder.typicode.com/todos/1",
-		Method: "GET",
-	}
-
-	httpClient := NewHttpClient()
-	resp, err := httpClient.SendRequest(request)
-	if err != nil || resp.StatusCode != 200 {
-		log.Fatal(err)
-	}
-
-	type Todo struct {
-		UserId    int    `json:"userId"`
-		Id        int    `json:"id"`
-		Title     string `json:"title"`
-		Completed bool   `json:"completed"`
-	}
-
-	var todo Todo
-	err = httpClient.DecodeResponse(resp, &todo)
-	if err != nil {
-		t.Log(err)
-	}
-
-	assert.Equal(1, todo.Id)
-}
-
-func TestHttpClent_Post(t *testing.T) {
-	header := http.Header{}
-	header.Add("Content-Type", "multipart/form-data")
-
-	postData := url.Values{}
-	postData.Add("userId", "1")
-	postData.Add("title", "testItem")
-
-	request := &HttpRequest{
-		RawURL:   "https://jsonplaceholder.typicode.com/todos",
-		Method:   "POST",
-		Headers:  header,
-		FormData: postData,
-	}
-
-	httpClient := NewHttpClient()
-	resp, err := httpClient.SendRequest(request)
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	body, _ := io.ReadAll(resp.Body)
-	t.Log("response: ", resp.StatusCode, string(body))
-}
-
-func TestStructToUrlValues(t *testing.T) {
-	assert := internal.NewAssert(t, "TestStructToUrlValues")
-
-	type TodoQuery struct {
-		Id     int `json:"id"`
-		UserId int `json:"userId"`
-	}
-	todoQuery := TodoQuery{
-		Id:     1,
-		UserId: 1,
-	}
-	todoValues := StructToUrlValues(todoQuery)
-
-	assert.Equal("1", todoValues.Get("id"))
-	assert.Equal("1", todoValues.Get("userId"))
-
-	request := &HttpRequest{
-		RawURL:      "https://jsonplaceholder.typicode.com/todos",
-		Method:      "GET",
-		QueryParams: todoValues,
-	}
-
-	httpClient := NewHttpClient()
-	resp, err := httpClient.SendRequest(request)
-	if err != nil || resp.StatusCode != 200 {
-		log.Fatal(err)
-	}
-
-	body, _ := io.ReadAll(resp.Body)
-	t.Log("response: ", string(body))
-}
--- a/netutil/http_example_test.go
+++ b/netutil/http_example_test.go
@@ -1,99 +0,0 @@
-package netutil
-
-import "fmt"
-
-func ExampleHttpClient_SendRequest() {
-	request := &HttpRequest{
-		RawURL: "https://jsonplaceholder.typicode.com/todos/1",
-		Method: "GET",
-	}
-
-	httpClient := NewHttpClient()
-	resp, err := httpClient.SendRequest(request)
-	if err != nil || resp.StatusCode != 200 {
-		return
-	}
-
-	type Todo struct {
-		UserId    int    `json:"userId"`
-		Id        int    `json:"id"`
-		Title     string `json:"title"`
-		Completed bool   `json:"completed"`
-	}
-
-	var todo Todo
-	err = httpClient.DecodeResponse(resp, &todo)
-	if err != nil {
-		return
-	}
-
-	fmt.Println(todo.Id)
-
-	// Output:
-	// 1
-}
-
-func ExampleHttpClient_DecodeResponse() {
-	request := &HttpRequest{
-		RawURL: "https://jsonplaceholder.typicode.com/todos/1",
-		Method: "GET",
-	}
-
-	httpClient := NewHttpClient()
-	resp, err := httpClient.SendRequest(request)
-	if err != nil || resp.StatusCode != 200 {
-		return
-	}
-
-	type Todo struct {
-		UserId    int    `json:"userId"`
-		Id        int    `json:"id"`
-		Title     string `json:"title"`
-		Completed bool   `json:"completed"`
-	}
-
-	var todo Todo
-	err = httpClient.DecodeResponse(resp, &todo)
-	if err != nil {
-		return
-	}
-
-	fmt.Println(todo.Id)
-
-	// Output:
-	// 1
-}
-
-func ExampleStructToUrlValues() {
-	type TodoQuery struct {
-		Id   int    `json:"id"`
-		Name string `json:"name"`
-	}
-	todoQuery := TodoQuery{
-		Id:   1,
-		Name: "Test",
-	}
-	todoValues := StructToUrlValues(todoQuery)
-
-	fmt.Println(todoValues.Get("id"))
-	fmt.Println(todoValues.Get("name"))
-
-	// Output:
-	// 1
-	// Test
-}
-
-func ExampleConvertMapToQueryString() {
-	var m = map[string]any{
-		"c": 3,
-		"a": 1,
-		"b": 2,
-	}
-
-	qs := ConvertMapToQueryString(m)
-
-	fmt.Println(qs)
-
-	// Output:
-	// a=1&b=2&c=3
-}
--- a/netutil/http_test.go
+++ b/netutil/http_test.go
@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"io"
 	"log"
+	"net/http"
 	"net/url"
 	"testing"

@@ -156,3 +157,90 @@ func TestParseResponse(t *testing.T) {
 	}
 	t.Log("response: ", toDoResp)
 }
+
+func TestHttpClient_Get(t *testing.T) {
+	assert := internal.NewAssert(t, "TestHttpClient_Get")
+
+	request := &HttpRequest{
+		RawURL: "https://jsonplaceholder.typicode.com/todos/1",
+		Method: "GET",
+	}
+
+	httpClient := NewHttpClient()
+	resp, err := httpClient.SendRequest(request)
+	if err != nil || resp.StatusCode != 200 {
+		log.Fatal(err)
+	}
+
+	type Todo struct {
+		UserId    int    `json:"userId"`
+		Id        int    `json:"id"`
+		Title     string `json:"title"`
+		Completed bool   `json:"completed"`
+	}
+
+	var todo Todo
+	err = httpClient.DecodeResponse(resp, &todo)
+	if err != nil {
+		t.Log(err)
+	}
+
+	assert.Equal(1, todo.Id)
+}
+
+func TestHttpClent_Post(t *testing.T) {
+	header := http.Header{}
+	header.Add("Content-Type", "multipart/form-data")
+
+	postData := url.Values{}
+	postData.Add("userId", "1")
+	postData.Add("title", "testItem")
+
+	request := &HttpRequest{
+		RawURL:   "https://jsonplaceholder.typicode.com/todos",
+		Method:   "POST",
+		Headers:  header,
+		FormData: postData,
+	}
+
+	httpClient := NewHttpClient()
+	resp, err := httpClient.SendRequest(request)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	body, _ := io.ReadAll(resp.Body)
+	t.Log("response: ", resp.StatusCode, string(body))
+}
+
+func TestStructToUrlValues(t *testing.T) {
+	assert := internal.NewAssert(t, "TestStructToUrlValues")
+
+	type TodoQuery struct {
+		Id     int `json:"id"`
+		UserId int `json:"userId"`
+	}
+	todoQuery := TodoQuery{
+		Id:     1,
+		UserId: 1,
+	}
+	todoValues := StructToUrlValues(todoQuery)
+
+	assert.Equal("1", todoValues.Get("id"))
+	assert.Equal("1", todoValues.Get("userId"))
+
+	request := &HttpRequest{
+		RawURL:      "https://jsonplaceholder.typicode.com/todos",
+		Method:      "GET",
+		QueryParams: todoValues,
+	}
+
+	httpClient := NewHttpClient()
+	resp, err := httpClient.SendRequest(request)
+	if err != nil || resp.StatusCode != 200 {
+		log.Fatal(err)
+	}
+
+	body, _ := io.ReadAll(resp.Body)
+	t.Log("response: ", string(body))
+}
--- a/netutil/net_example_test.go
+++ b/netutil/net_example_test.go
@@ -89,3 +89,68 @@ func ExampleEncodeUrl() {
 	// Output:
 	// http://www.lancet.com?a=1&b=%5B2%5D
 }
+
+func ExampleHttpClient_DecodeResponse() {
+	request := &HttpRequest{
+		RawURL: "https://jsonplaceholder.typicode.com/todos/1",
+		Method: "GET",
+	}
+
+	httpClient := NewHttpClient()
+	resp, err := httpClient.SendRequest(request)
+	if err != nil || resp.StatusCode != 200 {
+		return
+	}
+
+	type Todo struct {
+		UserId    int    `json:"userId"`
+		Id        int    `json:"id"`
+		Title     string `json:"title"`
+		Completed bool   `json:"completed"`
+	}
+
+	var todo Todo
+	err = httpClient.DecodeResponse(resp, &todo)
+	if err != nil {
+		return
+	}
+
+	fmt.Println(todo.Id)
+
+	// Output:
+	// 1
+}
+
+func ExampleStructToUrlValues() {
+	type TodoQuery struct {
+		Id   int    `json:"id"`
+		Name string `json:"name"`
+	}
+	todoQuery := TodoQuery{
+		Id:   1,
+		Name: "Test",
+	}
+	todoValues := StructToUrlValues(todoQuery)
+
+	fmt.Println(todoValues.Get("id"))
+	fmt.Println(todoValues.Get("name"))
+
+	// Output:
+	// 1
+	// Test
+}
+
+func ExampleConvertMapToQueryString() {
+	var m = map[string]any{
+		"c": 3,
+		"a": 1,
+		"b": 2,
+	}
+
+	qs := ConvertMapToQueryString(m)
+
+	fmt.Println(qs)
+
+	// Output:
+	// a=1&b=2&c=3
+}
--- a/random/random_example_test.go
+++ b/random/random_example_test.go
@@ -6,7 +6,6 @@ import (
 )

 func ExampleRandInt() {
-
 	result := RandInt(1, 10)

 	if result >= 1 && result < 10 {
--- a/stream/stream.go
+++ b/stream/stream.go
@@ -0,0 +1,261 @@
+// Copyright 2023 dudaodong@gmail.com. All rights resulterved.
+// Use of this source code is governed by MIT license
+
+// Package stream implements a sequence of elements supporting sequential and parallel aggregate operations.
+// this package is an experiment to explore if stream in go can work as the way java does. it's complete, but not
+// powerful like other libs
+package stream
+
+import (
+	"bytes"
+	"encoding/gob"
+
+	"golang.org/x/exp/constraints"
+)
+
+// A stream should implements methods:
+// type StreamI[T any] interface {
+
+// 	// part methods of Java Stream Specification.
+// 	Distinct() StreamI[T]
+// 	Filter(predicate func(item T) bool) StreamI[T]
+// 	FlatMap(mapper func(item T) StreamI[T]) StreamI[T]
+// 	Map(mapper func(item T) T) StreamI[T]
+// 	Peek(consumer func(item T)) StreamI[T]
+
+// 	Sort(less func(a, b T) bool) StreamI[T]
+// 	Max(less func(a, b T) bool) (T, bool)
+// 	Min(less func(a, b T) bool) (T, bool)
+
+// 	Limit(maxSize int) StreamI[T]
+// 	Skip(n int) StreamI[T]
+
+// 	AllMatch(predicate func(item T) bool) bool
+// 	AnyMatch(predicate func(item T) bool) bool
+// 	NoneMatch(predicate func(item T) bool) bool
+// 	ForEach(consumer func(item T))
+// 	Reduce(init T, accumulator func(a, b T) T) T
+// 	Count() int
+
+// 	FindFirst() (T, bool)
+
+// 	ToSlice() []T
+
+// 	// part of methods custom extension
+// 	Reverse() StreamI[T]
+// 	Range(start, end int64) StreamI[T]
+// 	Concat(streams ...StreamI[T]) StreamI[T]
+// }
+
+type stream[T any] struct {
+	source []T
+}
+
+// Of creates a stream stream whose elements are the specified values.
+func Of[T any](elems ...T) stream[T] {
+	return FromSlice(elems)
+}
+
+// Generate stream where each element is generated by the provided generater function
+// generater function: func() func() (item T, ok bool) {}
+func Generate[T any](generator func() func() (item T, ok bool)) stream[T] {
+	source := make([]T, 0)
+
+	var zeroValue T
+	for next, item, ok := generator(), zeroValue, true; ok; {
+		item, ok = next()
+		if ok {
+			source = append(source, item)
+		}
+	}
+
+	return FromSlice(source)
+}
+
+// FromSlice create stream from slice.
+func FromSlice[T any](source []T) stream[T] {
+	return stream[T]{source: source}
+}
+
+// FromChannel create stream from channel.
+func FromChannel[T any](source <-chan T) stream[T] {
+	s := make([]T, 0)
+
+	for v := range source {
+		s = append(s, v)
+	}
+
+	return FromSlice(s)
+}
+
+// FromRange create a number stream from start to end. both start and end are included. [start, end]
+func FromRange[T constraints.Integer | constraints.Float](start, end, step T) stream[T] {
+	if end < start {
+		panic("stream.FromRange: param start should be before param end")
+	} else if step <= 0 {
+		panic("stream.FromRange: param step should be positive")
+	}
+
+	l := int((end-start)/step) + 1
+	source := make([]T, l, l)
+
+	for i := 0; i < l; i++ {
+		source[i] = start + (T(i) * step)
+	}
+
+	return FromSlice(source)
+}
+
+// Distinct returns a stream that removes the duplicated items.
+func (s stream[T]) Distinct() stream[T] {
+	source := make([]T, 0)
+
+	distinct := map[string]bool{}
+
+	for _, v := range s.source {
+		// todo: performance issue
+		k := hashKey(v)
+		if _, ok := distinct[k]; !ok {
+			distinct[k] = true
+			source = append(source, v)
+		}
+	}
+
+	return FromSlice(source)
+}
+
+func hashKey(data any) string {
+	buffer := bytes.NewBuffer(nil)
+	encoder := gob.NewEncoder(buffer)
+	err := encoder.Encode(data)
+	if err != nil {
+		panic("stream.hashKey: get hashkey failed")
+	}
+	return buffer.String()
+}
+
+// Filter returns a stream consisting of the elements of this stream that match the given predicate.
+func (s stream[T]) Filter(predicate func(item T) bool) stream[T] {
+	source := make([]T, 0)
+
+	for _, v := range s.source {
+		if predicate(v) {
+			source = append(source, v)
+		}
+	}
+
+	return FromSlice(source)
+}
+
+// Map returns a stream consisting of the elements of this stream that apply the given function to elements of stream.
+func (s stream[T]) Map(mapper func(item T) T) stream[T] {
+	source := make([]T, s.Count(), s.Count())
+
+	for i, v := range s.source {
+		source[i] = mapper(v)
+	}
+
+	return FromSlice(source)
+}
+
+// Peek returns a stream consisting of the elements of this stream, additionally performing the provided action on each element as elements are consumed from the resulting stream.
+func (s stream[T]) Peek(consumer func(item T)) stream[T] {
+	for _, v := range s.source {
+		consumer(v)
+	}
+
+	return s
+}
+
+// Skip returns a stream consisting of the remaining elements of this stream after discarding the first n elements of the stream.
+// If this stream contains fewer than n elements then an empty stream will be returned.
+func (s stream[T]) Skip(n int) stream[T] {
+	if n <= 0 {
+		return s
+	}
+
+	source := make([]T, 0)
+	l := len(s.source)
+
+	if n > l {
+		return FromSlice(source)
+	}
+
+	for i := n; i < l; i++ {
+		source = append(source, s.source[i])
+	}
+
+	return FromSlice(source)
+}
+
+// Limit returns a stream consisting of the elements of this stream, truncated to be no longer than maxSize in length.
+func (s stream[T]) Limit(maxSize int) stream[T] {
+	if s.source == nil {
+		return s
+	}
+
+	if maxSize < 0 {
+		return FromSlice([]T{})
+	}
+
+	source := make([]T, 0, maxSize)
+
+	for i := 0; i < len(s.source) && i < maxSize; i++ {
+		source = append(source, s.source[i])
+	}
+
+	return FromSlice(source)
+}
+
+// AllMatch returns whether all elements of this stream match the provided predicate.
+func (s stream[T]) AllMatch(predicate func(item T) bool) bool {
+	for _, v := range s.source {
+		if !predicate(v) {
+			return false
+		}
+	}
+
+	return true
+}
+
+// AnyMatch returns whether any elements of this stream match the provided predicate.
+func (s stream[T]) AnyMatch(predicate func(item T) bool) bool {
+	for _, v := range s.source {
+		if predicate(v) {
+			return true
+		}
+	}
+
+	return false
+}
+
+// NoneMatch returns whether no elements of this stream match the provided predicate.
+func (s stream[T]) NoneMatch(predicate func(item T) bool) bool {
+	return !s.AnyMatch(predicate)
+}
+
+// ForEach performs an action for each element of this stream.
+func (s stream[T]) ForEach(action func(item T)) {
+	for _, v := range s.source {
+		action(v)
+	}
+}
+
+// Reduce performs a reduction on the elements of this stream, using an associative accumulation function, and returns an Optional describing the reduced value, if any.
+func (s stream[T]) Reduce(init T, accumulator func(a, b T) T) T {
+	for _, v := range s.source {
+		init = accumulator(init, v)
+	}
+
+	return init
+}
+
+// Count returns the count of elements in the stream.
+func (s stream[T]) Count() int {
+	return len(s.source)
+}
+
+// ToSlice return the elements in the stream.
+func (s stream[T]) ToSlice() []T {
+	return s.source
+}
--- a/stream/stream_test.go
+++ b/stream/stream_test.go
@@ -0,0 +1,249 @@
+package stream
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestOf(t *testing.T) {
+	assert := internal.NewAssert(t, "TestFromSlice")
+
+	stream := Of(1, 2, 3)
+	assert.Equal([]int{1, 2, 3}, stream.ToSlice())
+}
+
+func TestGenerate(t *testing.T) {
+	assert := internal.NewAssert(t, "TestFromSlice")
+
+	n := 0
+	max := 4
+
+	generator := func() func() (int, bool) {
+		return func() (int, bool) {
+			n++
+			return n, n < max
+		}
+	}
+
+	stream := Generate(generator)
+
+	assert.Equal([]int{1, 2, 3}, stream.ToSlice())
+}
+
+func TestFromSlice(t *testing.T) {
+	assert := internal.NewAssert(t, "TestFromSlice")
+
+	stream := FromSlice([]int{1, 2, 3})
+
+	assert.Equal([]int{1, 2, 3}, stream.ToSlice())
+}
+
+func TestFromChannel(t *testing.T) {
+	assert := internal.NewAssert(t, "TestFromChannel")
+
+	ch := make(chan int)
+	go func() {
+		for i := 1; i < 4; i++ {
+			ch <- i
+		}
+		close(ch)
+	}()
+
+	stream := FromChannel(ch)
+
+	assert.Equal([]int{1, 2, 3}, stream.ToSlice())
+}
+
+func TestFromRange(t *testing.T) {
+	assert := internal.NewAssert(t, "TestFromRange")
+
+	s1 := FromRange(1, 5, 1)
+	s2 := FromRange(1.1, 5.0, 1.0)
+
+	assert.Equal([]int{1, 2, 3, 4, 5}, s1.ToSlice())
+	assert.Equal([]float64{1.1, 2.1, 3.1, 4.1}, s2.ToSlice())
+}
+
+func TestStream_Distinct(t *testing.T) {
+	assert := internal.NewAssert(t, "TestStream_Distinct")
+
+	nums := FromSlice([]int{1, 2, 2, 3, 3, 3})
+	distinctNums := nums.Distinct()
+
+	assert.Equal([]int{1, 2, 2, 3, 3, 3}, nums.ToSlice())
+	assert.Equal([]int{1, 2, 3}, distinctNums.ToSlice())
+
+	type Person struct {
+		Id   string
+		Name string
+		Age  uint
+	}
+
+	people := []Person{
+		{Id: "001", Name: "Tom", Age: 10},
+		{Id: "001", Name: "Tom", Age: 10},
+		{Id: "002", Name: "Jim", Age: 20},
+		{Id: "003", Name: "Mike", Age: 30},
+	}
+
+	stream := FromSlice(people)
+	distinctStream := stream.Distinct()
+
+	// {[{001 Tom 10} {001 Tom 10} {002 Jim 20} {003 Mike 30}]}
+	t.Log(stream)
+
+	// {[{001 Tom 10} {002 Jim 20} {003 Mike 30}]}
+	t.Log(distinctStream)
+}
+
+func TestStream_Filter(t *testing.T) {
+	assert := internal.NewAssert(t, "TestStream_Filter")
+
+	stream := FromSlice([]int{1, 2, 3, 4, 5})
+
+	isEven := func(n int) bool {
+		return n%2 == 0
+	}
+
+	even := stream.Filter(isEven)
+
+	assert.Equal([]int{2, 4}, even.ToSlice())
+}
+
+func TestStream_Map(t *testing.T) {
+	assert := internal.NewAssert(t, "TestStream_Map")
+
+	stream := FromSlice([]int{1, 2, 3})
+
+	addOne := func(n int) int {
+		return n + 1
+	}
+
+	s := stream.Map(addOne)
+
+	assert.Equal([]int{2, 3, 4}, s.ToSlice())
+}
+
+func TestStream_Peek(t *testing.T) {
+	assert := internal.NewAssert(t, "TestStream_Peek")
+
+	stream := FromSlice([]int{1, 2, 3, 4, 5, 6})
+
+	result := []string{}
+	stream = stream.Filter(func(n int) bool {
+		return n <= 3
+	}).Peek(func(n int) {
+		result = append(result, fmt.Sprint("current: ", n))
+	})
+
+	assert.Equal([]int{1, 2, 3}, stream.ToSlice())
+	assert.Equal([]string{
+		"current: 1", "current: 2", "current: 3",
+	}, result)
+}
+
+func TestStream_Skip(t *testing.T) {
+	assert := internal.NewAssert(t, "TestStream_Peek")
+
+	stream := FromSlice([]int{1, 2, 3, 4, 5, 6})
+
+	s1 := stream.Skip(-1)
+	s2 := stream.Skip(0)
+
+	assert.Equal([]int{1, 2, 3, 4, 5, 6}, s1.ToSlice())
+	assert.Equal([]int{1, 2, 3, 4, 5, 6}, s2.ToSlice())
+}
+
+func TestStream_Limit(t *testing.T) {
+	assert := internal.NewAssert(t, "TestStream_Limit")
+
+	stream := FromSlice([]int{1, 2, 3, 4, 5, 6})
+
+	s1 := stream.Limit(-1)
+	s2 := stream.Limit(0)
+	s3 := stream.Limit(1)
+	s4 := stream.Limit(6)
+
+	assert.Equal([]int{}, s1.ToSlice())
+	assert.Equal([]int{}, s2.ToSlice())
+	assert.Equal([]int{1}, s3.ToSlice())
+	assert.Equal([]int{1, 2, 3, 4, 5, 6}, s4.ToSlice())
+}
+
+func TestStream_AllMatch(t *testing.T) {
+	assert := internal.NewAssert(t, "TestStream_AllMatch")
+
+	stream := FromSlice([]int{1, 2, 3, 4, 5, 6})
+
+	result1 := stream.AllMatch(func(item int) bool {
+		return item > 0
+	})
+
+	result2 := stream.AllMatch(func(item int) bool {
+		return item > 1
+	})
+
+	assert.Equal(true, result1)
+	assert.Equal(false, result2)
+}
+
+func TestStream_AnyMatch(t *testing.T) {
+	assert := internal.NewAssert(t, "TestStream_AnyMatch")
+
+	stream := FromSlice([]int{1, 2, 3})
+
+	result1 := stream.AnyMatch(func(item int) bool {
+		return item > 3
+	})
+
+	result2 := stream.AnyMatch(func(item int) bool {
+		return item > 1
+	})
+
+	assert.Equal(false, result1)
+	assert.Equal(true, result2)
+}
+
+func TestStream_NoneMatch(t *testing.T) {
+	assert := internal.NewAssert(t, "TestStream_NoneMatch")
+
+	stream := FromSlice([]int{1, 2, 3})
+
+	result1 := stream.NoneMatch(func(item int) bool {
+		return item > 3
+	})
+
+	result2 := stream.NoneMatch(func(item int) bool {
+		return item > 1
+	})
+
+	assert.Equal(true, result1)
+	assert.Equal(false, result2)
+}
+
+func TestStream_ForEach(t *testing.T) {
+	assert := internal.NewAssert(t, "TestStream_ForEach")
+
+	stream := FromSlice([]int{1, 2, 3})
+
+	result := 0
+	stream.ForEach(func(item int) {
+		result += item
+	})
+
+	assert.Equal(6, result)
+}
+
+func TestStream_Reduce(t *testing.T) {
+	assert := internal.NewAssert(t, "TestStream_Reduce")
+
+	stream := FromSlice([]int{1, 2, 3})
+
+	result := stream.Reduce(0, func(a, b int) int {
+		return a + b
+	})
+
+	assert.Equal(6, result)
+}
--- a/system/os_example_test.go
+++ b/system/os_example_test.go
@@ -3,10 +3,10 @@ package system
 import "fmt"

 func ExampleSetOsEnv() {
-	ok := SetOsEnv("foo", "abc")
+	err := SetOsEnv("foo", "abc")
 	result := GetOsEnv("foo")

-	fmt.Println(ok)
+	fmt.Println(err)
 	fmt.Println(result)
 	// Output:
 	// <nil>
@@ -25,14 +25,14 @@ func ExampleGetOsEnv() {
 }

 func ExampleRemoveOsEnv() {
-	ok1 := SetOsEnv("foo", "abc")
+	err1 := SetOsEnv("foo", "abc")
 	result1 := GetOsEnv("foo")

-	ok2 := RemoveOsEnv("foo")
+	err2 := RemoveOsEnv("foo")
 	result2 := GetOsEnv("foo")

-	fmt.Println(ok1)
-	fmt.Println(ok2)
+	fmt.Println(err1)
+	fmt.Println(err2)
 	fmt.Println(result1)
 	fmt.Println(result2)

@@ -49,9 +49,10 @@ func ExampleCompareOsEnv() {
 		return
 	}

-	result1 := CompareOsEnv("foo", "abc")
+	result := CompareOsEnv("foo", "abc")
+
+	fmt.Println(result)

-	fmt.Println(result1)
 	// Output:
 	// true
 }
--- a/validator/validator.go
+++ b/validator/validator.go
@@ -25,7 +25,7 @@ var (
 	chineseMobileMatcher *regexp.Regexp = regexp.MustCompile(`^1(?:3\d|4[4-9]|5[0-35-9]|6[67]|7[013-8]|8\d|9\d)\d{8}$`)
 	chineseIdMatcher     *regexp.Regexp = regexp.MustCompile(`^[1-9]\d{5}(18|19|20|21|22)\d{2}((0[1-9])|(1[0-2]))(([0-2][1-9])|10|20|30|31)\d{3}[0-9Xx]$`)
 	chineseMatcher       *regexp.Regexp = regexp.MustCompile("[\u4e00-\u9fa5]")
-	chinesePhoneMatcher  *regexp.Regexp = regexp.MustCompile(`\d{3}-\d{8}|\d{4}-\d{7}`)
+	chinesePhoneMatcher  *regexp.Regexp = regexp.MustCompile(`\d{3}-\d{8}|\d{4}-\d{7}|\d{4}-\d{8}`)
 	creditCardMatcher    *regexp.Regexp = regexp.MustCompile(`^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|(222[1-9]|22[3-9][0-9]|2[3-6][0-9]{2}|27[01][0-9]|2720)[0-9]{12}|6(?:011|5[0-9][0-9])[0-9]{12}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|(?:2131|1800|35\\d{3})\\d{11}|6[27][0-9]{14})$`)
 	base64Matcher        *regexp.Regexp = regexp.MustCompile(`^(?:[A-Za-z0-9+\\/]{4})*(?:[A-Za-z0-9+\\/]{2}==|[A-Za-z0-9+\\/]{3}=|[A-Za-z0-9+\\/]{4})$`)
 )
--- a/validator/validator_test.go
+++ b/validator/validator_test.go
@@ -208,6 +208,7 @@ func TestIsChinesePhone(t *testing.T) {

 	assert.Equal(true, IsChinesePhone("010-32116675"))
 	assert.Equal(true, IsChinesePhone("0464-8756213"))
+	assert.Equal(true, IsChinesePhone("0731-82251545")) //长沙晚报电话
 	assert.Equal(false, IsChinesePhone("123-87562"))

 }
Author	SHA1	Message	Date
dudaodong	9cd9d1aeb5	release v2.1.14	2023-02-06 17:42:13 +08:00
dudaodong	71b27c0aa9	feat: add ForEach, Reduce for stream	2023-02-06 17:40:54 +08:00
dudaodong	09a379ec6d	feat: add ForEach, Reduce for stream	2023-02-06 17:38:33 +08:00
dudaodong	b4b9b03835	feat: add NoneMatch, AllMatch, AnyMatch for stream	2023-02-06 17:24:17 +08:00
dudaodong	48c7794b01	feat: add Limit method of stream	2023-02-06 17:08:36 +08:00
dudaodong	8e3911833d	doc: normalize documents	2023-02-06 11:42:03 +08:00
dudaodong	ebe494051b	doc: add doc for some new methods of list	2023-02-06 11:35:32 +08:00
dudaodong	c35bda6a65	feat: add ListToMap for list	2023-02-06 11:06:46 +08:00
dudaodong	1fe4cdc429	feat: add Difference and SymmetricDifference for list	2023-02-06 10:55:42 +08:00
dudaodong	6a79e322e3	Merge branch 'main' into v2	2023-02-06 10:00:02 +08:00
Cai Zhijiang	17e8d2bb6d	部分城市有4位区号+8位号码 (#69 )	2023-02-06 09:47:21 +08:00
燕归来	325be0d6a1	feat: add func Iterator, ForEach, RetainAll and DeleteAll for List structure (#71 )	2023-02-06 09:46:25 +08:00
dudaodong	ea0f96a8c0	feat: add Skip for stream	2023-01-30 16:56:33 +08:00
dudaodong	82cbb54787	feat: add FromChannel for create stream	2023-01-17 16:47:20 +08:00
dudaodong	585d33cafa	feat: add Generate for create stream	2023-01-17 16:31:44 +08:00
dudaodong	bc4cf35e15	feat: add Filter, Map, Count for stream	2023-01-17 14:59:47 +08:00
dudaodong	a3bc20af1d	feat: add Distinct	2023-01-17 11:39:05 +08:00
dudaodong	61338b6b46	feat: add Stream package	2023-01-17 11:25:15 +08:00
dudaodong	bc3c080ac3	doc: normalize document	2023-01-15 12:43:00 +08:00
dudaodong	d3fab15af3	refactor: clean structure for netutil package	2023-01-14 14:39:06 +08:00
dudaodong	6e3e411d46	doc: normalize document	2023-01-14 12:48:39 +08:00
dudaodong	f976941e36	doc: normalize document	2023-01-14 12:32:27 +08:00