diff --git a/README.md b/README.md
index 09e4213..2d3f2a3 100644
--- a/README.md
+++ b/README.md
@@ -248,6 +248,8 @@ import "github.com/duke-git/lancet/v2/convertor"
     [[play](https://go.dev/play/p/zI6xsmuQRbn)]
 -   **<big>DeepClone</big>** : creates a deep copy of passed item, can't clone unexported field of struct.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#DeepClone)]
+    [[play](https://go.dev/play/p/j4DP5dquxnk)]
+
 
 ### 5. Cryptor package is for data encryption and decryption.
 
@@ -836,13 +838,16 @@ import "github.com/duke-git/lancet/v2/slice"
     [[play](https://go.dev/play/p/pJ-d6MUWcvK)]
 -   **<big>Drop</big>** : drop n elements from the start of a slice.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Drop)]
-    [[play](https://go.dev/play/p/pJ-d6MUWcvK)]
+    [[play](https://go.dev/play/p/jnPO2yQsT8H)]
 -   **<big>DropRight</big>** : drop n elements from the end of a slice.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DropRight)]
+    [[play](https://go.dev/play/p/8bcXvywZezG)]
 -   **<big>DropWhile</big>** : drop n elements from the start of a slice while predicate function returns true.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DropWhile)]
+    [[play](https://go.dev/play/p/4rt252UV_qs)]
 -   **<big>DropRightWhile</big>** : drop n elements from the end of a slice while predicate function returns true.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DropRightWhile)]
+    [[play](https://go.dev/play/p/6wyK3zMY56e)]
 -   **<big>Equal</big>** : checks if two slices are equal: the same length and all elements' order and value are equal.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Equal)]
     [[play](https://go.dev/play/p/WcRQJ37ifPa)]
@@ -920,12 +925,16 @@ import "github.com/duke-git/lancet/v2/slice"
     [[play](https://go.dev/play/p/YHvhnWGU3Ge)]
 -   **<big>IsAscending</big>** : Checks if a slice is ascending order.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice.md#IsAscending)]
+    [[play](https://go.dev/play/p/9CtsFjet4SH)]
 -   **<big>IsDescending</big>** : Checks if a slice is descending order.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice.md#IsDescending)]
+    [[play](https://go.dev/play/p/U_LljFXma14)]
 -   **<big>IsSorted</big>** : Checks if a slice is sorted (ascending or descending).
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice.md#IsSorted)]
+    [[play](https://go.dev/play/p/nCE8wPLwSA-)]
 -   **<big>IsSortedByKey</big>** : Checks if a slice is sorted by iteratee function.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice.md#IsSortedByKey)]
+    [[play](https://go.dev/play/p/tUoGB7DOHI4)]
 -   **<big>Sort</big>** : sorts a slice of any ordered type(number or string).
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Sort)]
     [[play](https://go.dev/play/p/V9AVjzf_4Fk)]
diff --git a/README_zh-CN.md b/README_zh-CN.md
index 36ec432..d14b66d 100644
--- a/README_zh-CN.md
+++ b/README_zh-CN.md
@@ -247,6 +247,8 @@ import "github.com/duke-git/lancet/v2/convertor"
     [[play](https://go.dev/play/p/zI6xsmuQRbn)]
 -   **<big>DeepClone</big>** : 创建一个传入值的深拷贝, 无法克隆结构体的非导出字段。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#DeepClone)]
+    [[play](https://go.dev/play/p/j4DP5dquxnk)]
+
 
 
 ### 5. cryptor 加密包支持数据加密和解密，获取 md5，hash 值。支持 base64, md5, hmac, aes, des, rsa。
@@ -844,13 +846,16 @@ import "github.com/duke-git/lancet/v2/slice"
     [[play](https://go.dev/play/p/pJ-d6MUWcvK)]
 -   **<big>Drop</big>** : 从切片头部删除n个元素。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Drop)]
-    [[play](https://go.dev/play/p/pJ-d6MUWcvK)]
+    [[play](https://go.dev/play/p/jnPO2yQsT8H)]
 -   **<big>DropRight</big>** : 从切片尾部删除n个元素。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#DropRight)]
+    [[play](https://go.dev/play/p/8bcXvywZezG)]
 -   **<big>DropWhile</big>** : 从切片的头部删除n个元素，这个n个元素满足predicate函数返回true。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#DropWhile)]
+    [[play](https://go.dev/play/p/4rt252UV_qs)]
 -   **<big>DropRightWhile</big>** : 从切片的尾部删除n个元素，这个n个元素满足predicate函数返回true。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#DropRightWhile)]
+    [[play](https://go.dev/play/p/6wyK3zMY56e)]
 -   **<big>Equal</big>** : 检查两个切片是否相等，相等条件：切片长度相同，元素顺序和值都相同。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Equal)]
     [[play](https://go.dev/play/p/WcRQJ37ifPa)]
@@ -928,12 +933,16 @@ import "github.com/duke-git/lancet/v2/slice"
     [[play](https://go.dev/play/p/YHvhnWGU3Ge)]
 -   **<big>IsAscending</big>** : 检查切片元素是否按升序排列。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#IsAscending)]
+    [[play](https://go.dev/play/p/9CtsFjet4SH)]
 -   **<big>IsDescending</big>** : 检查切片元素是否按降序排列。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#IsDescending)]
+    [[play](https://go.dev/play/p/U_LljFXma14)]
 -   **<big>IsSorted</big>** : 检查切片元素是否是有序的（升序或降序）。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#IsSorted)]
+    [[play](https://go.dev/play/p/nCE8wPLwSA-)]
 -   **<big>IsSortedByKey</big>** : 通过iteratee函数，检查切片元素是否是有序的。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#IsSortedByKey)]
+    [[play](https://go.dev/play/p/tUoGB7DOHI4)]
 -   **<big>Sort</big>** : 对任何有序类型（数字或字符串）的切片进行排序，使用快速排序算法。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Sort)]
     [[play](https://go.dev/play/p/V9AVjzf_4Fk)]
diff --git a/convertor/convertor.go b/convertor/convertor.go
index 2aae431..a6a229b 100644
--- a/convertor/convertor.go
+++ b/convertor/convertor.go
@@ -327,7 +327,7 @@ func DecodeByte(data []byte, target any) error {
 
 // DeepClone creates a deep copy of passed item.
 // can't clone unexported field of struct
-// Play: todo
+// Play: https://go.dev/play/p/j4DP5dquxnk
 func DeepClone[T any](src T) T {
 	c := cloner{
 		ptrs: map[reflect.Type]map[uintptr]reflect.Value{},
diff --git a/slice/slice.go b/slice/slice.go
index 980fc89..dca073c 100644
--- a/slice/slice.go
+++ b/slice/slice.go
@@ -559,7 +559,7 @@ func DeleteAt[T any](slice []T, start int, end ...int) []T {
 }
 
 // Drop drop n elements from the start of a slice.
-// Play: https://go.dev/play/p/pJ-d6MUWcvK
+// Play: https://go.dev/play/p/jnPO2yQsT8H
 func Drop[T any](slice []T, n int) []T {
 	size := len(slice)
 
@@ -577,7 +577,7 @@ func Drop[T any](slice []T, n int) []T {
 }
 
 // DropRight drop n elements from the end of a slice.
-// Play: todo
+// Play: https://go.dev/play/p/8bcXvywZezG
 func DropRight[T any](slice []T, n int) []T {
 	size := len(slice)
 
@@ -595,7 +595,7 @@ func DropRight[T any](slice []T, n int) []T {
 }
 
 // DropWhile drop n elements from the start of a slice while predicate function returns true.
-// Play: todo
+// Play: https://go.dev/play/p/4rt252UV_qs
 func DropWhile[T any](slice []T, predicate func(item T) bool) []T {
 	i := 0
 
@@ -611,7 +611,7 @@ func DropWhile[T any](slice []T, predicate func(item T) bool) []T {
 }
 
 // DropRightWhile drop n elements from the end of a slice while predicate function returns true.
-// Play: todo
+// Play: https://go.dev/play/p/6wyK3zMY56e
 func DropRightWhile[T any](slice []T, predicate func(item T) bool) []T {
 	i := len(slice) - 1
 
@@ -831,7 +831,7 @@ func Shuffle[T any](slice []T) []T {
 }
 
 // IsAscending checks if a slice is ascending order.
-// Play: todo
+// Play: https://go.dev/play/p/9CtsFjet4SH
 func IsAscending[T constraints.Ordered](slice []T) bool {
 	for i := 1; i < len(slice); i++ {
 		if slice[i-1] > slice[i] {
@@ -843,7 +843,7 @@ func IsAscending[T constraints.Ordered](slice []T) bool {
 }
 
 // IsDescending checks if a slice is descending order.
-// Play: todo
+// Play: https://go.dev/play/p/U_LljFXma14
 func IsDescending[T constraints.Ordered](slice []T) bool {
 	for i := 1; i < len(slice); i++ {
 		if slice[i-1] < slice[i] {
@@ -855,13 +855,13 @@ func IsDescending[T constraints.Ordered](slice []T) bool {
 }
 
 // IsSorted checks if a slice is sorted(ascending or descending).
-// Play: todo
+// Play: https://go.dev/play/p/nCE8wPLwSA-
 func IsSorted[T constraints.Ordered](slice []T) bool {
 	return IsAscending(slice) || IsDescending(slice)
 }
 
 // IsSortedByKey checks if a slice is sorted by iteratee function.
-// Play: todo
+// Play: https://go.dev/play/p/tUoGB7DOHI4
 func IsSortedByKey[T any, K constraints.Ordered](slice []T, iteratee func(item T) K) bool {
 	size := len(slice)