refactor: use for loop than for range

README.md

@@ -397,6 +397,9 @@ import "github.com/duke-git/lancet/v2/cryptor"
 -   **<big>HmacSha512</big>** : return the hmac hash of string use sha512.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#HmacSha512)]
     [[play](https://go.dev/play/p/59Od6m4A0Ud)]
+-   **<big>Md5Byte</big>** : return the md5 string of byte slice.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Md5Byte)]
+    [[play](https://go.dev/play/p/suraalH8lyC)]
 -   **<big>Md5String</big>** : return the md5 value of string.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Md5String)]
     [[play](https://go.dev/play/p/1bLcVetbTOI)]
@@ -486,6 +489,12 @@ import "github.com/duke-git/lancet/v2/datetime"
 -   **<big>GetNowDateTime</big>** : return format yyyy-mm-dd hh-mm-ss of current datetime.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetNowDateTime)]
     [[play](https://go.dev/play/p/pI4AqngD0al)]
+-   **<big>GetTodayStartTime</big>** : return the start time of today, format: yyyy-mm-dd 00:00:00.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetTodayStartTime)]
+    [[play](https://go.dev/play/p/84siyYF7t99)]
+-   **<big>GetTodayEndTime</big>** : return the end time of today, format: yyyy-mm-dd 23:59:59.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetTodayEndTime)]
+    [[play](https://go.dev/play/p/jjrLnfoqgn3)]
 -   **<big>GetZeroHourTimestamp</big>** : return timestamp of zero hour (timestamp of 00:00).
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetZeroHourTimestamp)]
     [[play](https://go.dev/play/p/QmL2oIaGE3q)]
@@ -1517,76 +1526,112 @@ import "github.com/duke-git/lancet/v2/tuple"
 
 -   **<big>Tuple2</big>** : represents a 2 elemnets tuple.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple2)]
+    [[play](https://go.dev/play/p/3sHVqBQpLYN)]
 -   **<big>Tuple2_Unbox</big>** : returns values in Tuple2.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple2_Unbox)]
+    [[play](https://go.dev/play/p/0fD1qfCVwjm)]
 -   **<big>Zip2</big>** : create a slice of Tuple2, whose elements are correspond to the given slice elements.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Zip2)]
+    [[play](https://go.dev/play/p/4ncWJJ77Xio)]
 -   **<big>Unzip2</big>** : create a group of slice from a slice of Tuple2.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Unzip2)]
+    [[play](https://go.dev/play/p/KBecr60feXb)]
 -   **<big>Tuple3</big>** : represents a 3 elemnets tuple.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple3)]
+    [[play](https://go.dev/play/p/FtH2sdCLlCf)]
 -   **<big>Tuple3_Unbox</big>** : returns values in Tuple3.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple3_Unbox)]
+    [[play](https://go.dev/play/p/YojLy-id1BS)]
 -   **<big>Zip3</big>** : create a slice of Tuple3, whose elements are correspond to the given slice elements.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Zip3)]
+    [[play](https://go.dev/play/p/97NgmsTILfu)]
 -   **<big>Unzip3</big>** : create a group of slice from a slice of Tuple3.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Unzip3)]
+    [[play](https://go.dev/play/p/bba4cpAa7KO)]
 -   **<big>Tuple4</big>** : represents a 4 elemnets tuple.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple4)]
+    [[play](https://go.dev/play/p/D2EqDz096tk)]
 -   **<big>Tuple4_Unbox</big>** : returns values in Tuple4.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple4_Unbox)]
+    [[play](https://go.dev/play/p/ACj9YuACGgW)]
 -   **<big>Zip4</big>** : create a slice of Tuple4, whose elements are correspond to the given slice elements.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Zip4)]
+    [[play](https://go.dev/play/p/PEmTYVK5hL4)]
 -   **<big>Unzip4</big>** : create a group of slice from a slice of Tuple4.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Unzip4)]
+    [[play](https://go.dev/play/p/rb8z4gyYSRN)]
 -   **<big>Tuple5</big>** : represents a 5 elemnets tuple.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple5)]
+    [[play](https://go.dev/play/p/2WndmVxPg-r)]
 -   **<big>Tuple5_Unbox</big>** : returns values in Tuple4.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple5_Unbox)]
+    [[play](https://go.dev/play/p/GyIyZHjCvoS)]
 -   **<big>Zip5</big>** : create a slice of Tuple5, whose elements are correspond to the given slice elements.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Zip5)]
+    [[play](https://go.dev/play/p/fCAAJLMfBIP)]
 -   **<big>Unzip5</big>** : create a group of slice from a slice of Tuple5.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Unzip5)]
+    [[play](https://go.dev/play/p/gyl6vKfhqPb)]
 -   **<big>Tuple6</big>** : represents a 6 elemnets tuple.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple6)]
+    [[play](https://go.dev/play/p/VjqcCwEJZbs)]
 -   **<big>Tuple6_Unbox</big>** : returns values in Tuple6.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple6_Unbox)]
+    [[play](https://go.dev/play/p/FjIHV7lpxmW)]
 -   **<big>Zip6</big>** : create a slice of Tuple6, whose elements are correspond to the given slice elements.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Zip6)]
+    [[play](https://go.dev/play/p/oWPrnUYuFHo)]
 -   **<big>Unzip6</big>** : create a group of slice from a slice of Tuple6.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Unzip6)]
+    [[play](https://go.dev/play/p/l41XFqCyh5E)]
 -   **<big>Tuple7</big>** : represents a 7 elemnets tuple.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple7)]
+    [[play](https://go.dev/play/p/dzAgv_Ezub9)]
 -   **<big>Tuple7_Unbox</big>** : returns values in Tuple7.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple7_Unbox)]
+    [[play](https://go.dev/play/p/R9I8qeDk0zs)]
 -   **<big>Zip7</big>** : create a slice of Tuple7, whose elements are correspond to the given slice elements.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Zip7)]
+    [[play](https://go.dev/play/p/WUJuo897Egf)]
 -   **<big>Unzip7</big>** : create a group of slice from a slice of Tuple7.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Unzip7)]
+    [[play](https://go.dev/play/p/hws_P1Fr2j3)]
 -   **<big>Tuple8</big>** : represents a 8 elemnets tuple.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple8)]
+    [[play](https://go.dev/play/p/YA9S0rz3dRz)]
 -   **<big>Tuple8_Unbox</big>** : returns values in Tuple8.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple8_Unbox)]
+    [[play](https://go.dev/play/p/PRxLBBb4SMl)]
 -   **<big>Zip8</big>** : create a slice of Tuple8, whose elements are correspond to the given slice elements.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Zip8)]
+    [[play](https://go.dev/play/p/8V9jWkuJfaQ)]
 -   **<big>Unzip8</big>** : create a group of slice from a slice of Tuple8.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Unzip8)]
+    [[play](https://go.dev/play/p/1SndOwGsZB4)]
 -   **<big>Tuple9</big>** : represents a 9 elemnets tuple.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple9)]
+    [[play](https://go.dev/play/p/yS2NGGtZpQr)]
 -   **<big>Tuple9_Unbox</big>** : returns values in Tuple9.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple9_Unbox)]
+    [[play](https://go.dev/play/p/oFJFGTAuOa8)]
 -   **<big>Zip9</big>** : create a slice of Tuple9, whose elements are correspond to the given slice elements.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Zip9)]
+    [[play](https://go.dev/play/p/cgsL15QYnfz)]
 -   **<big>Unzip9</big>** : create a group of slice from a slice of Tuple9.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Unzip9)]
+    [[play](https://go.dev/play/p/91-BU_KURSA)]
 -   **<big>Tuple10</big>** : represents a 10 elemnets tuple.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple10)]
+    [[play](https://go.dev/play/p/799qqZg0hUv)]
 -   **<big>Tuple10_Unbox</big>** : returns values in Tuple10.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Tuple10_Unbox)]
+    [[play](https://go.dev/play/p/qfyx3x_X0Cu)]
 -   **<big>Zip10</big>** : create a slice of Tuple10, whose elements are correspond to the given slice elements.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Zip10)]
+    [[play](https://go.dev/play/p/YSR-2cXnrY4)]
 -   **<big>Unzip10</big>** : create a group of slice from a slice of Tuple10.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple.md#Unzip10)]
+    [[play](https://go.dev/play/p/-taQB6Wfre_z)]
 
 <h3 id="Validator"> 24. Validator package contains some functions for data validation. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>
 

README_zh-CN.md

@@ -396,6 +396,9 @@ import "github.com/duke-git/lancet/v2/cryptor"
 -   **<big>HmacSha512</big>** : 返回字符串 sha256 hmac 值。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#HmacSha512)]
     [[play](https://go.dev/play/p/59Od6m4A0Ud)]
+-   **<big>Md5Byte</big>** : 返回byte slice的md5值.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Md5Byte)]
+    [[play](https://go.dev/play/p/suraalH8lyC)]
 -   **<big>Md5String</big>** : 返回字符串 md5 值。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Md5String)]
     [[play](https://go.dev/play/p/1bLcVetbTOI)]
@@ -485,6 +488,12 @@ import "github.com/duke-git/lancet/v2/datetime"
 -   **<big>GetNowDateTime</big>** : 获取当时日期和时间，返回格式：yyyy-mm-dd hh:mm:ss。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetNowDateTime)]
     [[play](https://go.dev/play/p/pI4AqngD0al)]
+-   **<big>GetTodayStartTime</big>** : 返回当天开始时间， 格式: yyyy-mm-dd 00:00:00。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetTodayStartTime)]
+    [[play](https://go.dev/play/p/84siyYF7t99)]
+-   **<big>GetTodayEndTime</big>** : 返回当天结束时间，格式: yyyy-mm-dd 23:59:59。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetTodayEndTime)]
+    [[play](https://go.dev/play/p/jjrLnfoqgn3)]
 -   **<big>GetZeroHourTimestamp</big>** : 获取零时时间戳(timestamp of 00:00)。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetZeroHourTimestamp)]
     [[play](https://go.dev/play/p/QmL2oIaGE3q)]
@@ -1522,76 +1531,113 @@ import "github.com/duke-git/lancet/v2/tuple"
 
 -   **<big>Tuple2</big>** : 2 元元组
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple2)]
+    [[play](https://go.dev/play/p/3sHVqBQpLYN)]
 -   **<big>Tuple2_Unbox</big>** : 返回 2 元元组的字段值。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple2_Unbox)]
+    [[play](https://go.dev/play/p/0fD1qfCVwjm)]
 -   **<big>Zip2</big>** : 创建一个 Tuple2 元组切片, 其中元组的元素和传入切片元素相对应。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Zip2)]
+    [[play](https://go.dev/play/p/4ncWJJ77Xio)]
 -   **<big>Unzip2</big>** : 根据传入的Tuple2切片，创建一组和Tuple2元素相对应的切片。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Unzip2)]
+    [[play](https://go.dev/play/p/KBecr60feXb)]
 -   **<big>Tuple3</big>** : 3 元元组
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple3)]
+    [[play](https://go.dev/play/p/FtH2sdCLlCf)]
 -   **<big>Tuple3_Unbox</big>** : 返回 3 元元组的字段值。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple3_Unbox)]
+    [[play](https://go.dev/play/p/YojLy-id1BS)]
 -   **<big>Zip3</big>** : 创建一个 Tuple3 元组切片, 其中元组的元素和传入切片元素相对应。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Zip3)]
+    [[play](https://go.dev/play/p/97NgmsTILfu)]
 -   **<big>Unzip3</big>** : 根据传入的Tuple3切片，创建一组和Tuple3元素相对应的切片。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Unzip3)]
+    [[play](https://go.dev/play/p/bba4cpAa7KO)]
 -   **<big>Tuple4</big>** : 4 元元组
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple4)]
+    [[play](https://go.dev/play/p/D2EqDz096tk)]
 -   **<big>Tuple4_Unbox</big>** : 返回 4 元元组的字段值。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple4_Unbox)]
+    [[play](https://go.dev/play/p/ACj9YuACGgW)]
 -   **<big>Zip4</big>** : 创建一个 Tuple4 元组切片, 其中元组的元素和传入切片元素相对应。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Zip4)]
+    [[play](https://go.dev/play/p/PEmTYVK5hL4)]
 -   **<big>Unzip4</big>** : 根据传入的Tuple4切片，创建一组和Tuple4元素相对应的切片。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Unzip4)]
+    [[play](https://go.dev/play/p/rb8z4gyYSRN)]
 -   **<big>Tuple5</big>** : 5 元元组
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple5)]
+    [[play](https://go.dev/play/p/2WndmVxPg-r)]
 -   **<big>Tuple5_Unbox</big>** : 返回 5 元元组的字段值。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple5_Unbox)]
+    [[play](https://go.dev/play/p/GyIyZHjCvoS)]
 -   **<big>Zip5</big>** : 创建一个 Tuple5 元组切片, 其中元组的元素和传入切片元素相对应。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Zip5)]
+    [[play](https://go.dev/play/p/fCAAJLMfBIP)]
 -   **<big>Unzip5</big>** : 根据传入的Tuple5切片，创建一组和Tuple5元素相对应的切片。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Unzip5)]
+    [[play](https://go.dev/play/p/gyl6vKfhqPb)]
 -   **<big>Tuple6</big>** : 6 元元组
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple6)]
+    [[play](https://go.dev/play/p/VjqcCwEJZbs)]
 -   **<big>Tuple6_Unbox</big>** : 返回 6 元元组的字段值。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple6_Unbox)]
+    [[play](https://go.dev/play/p/FjIHV7lpxmW)]
 -   **<big>Zip6</big>** : 创建一个 Tuple6 元组切片, 其中元组的元素和传入切片元素相对应。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Zip6)]
+    [[play](https://go.dev/play/p/oWPrnUYuFHo)]
 -   **<big>Unzip6</big>** : 根据传入的Tuple6切片，创建一组和Tuple6元素相对应的切片。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Unzip6)]
+    [[play](https://go.dev/play/p/l41XFqCyh5E)]
 -   **<big>Tuple7</big>** : 7 元元组
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple7)]
+    [[play](https://go.dev/play/p/dzAgv_Ezub9)]
 -   **<big>Tuple7_Unbox</big>** : 返回 7 元元组的字段值。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple7_Unbox)]
+    [[play](https://go.dev/play/p/R9I8qeDk0zs)]
 -   **<big>Zip7</big>** : 创建一个 Tuple7 元组切片, 其中元组的元素和传入切片元素相对应。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Zip7)]
+    [[play](https://go.dev/play/p/WUJuo897Egf)]
 -   **<big>Unzip7</big>** : 根据传入的Tuple7切片，创建一组和Tuple7元素相对应的切片。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Unzip7)]
+    [[play](https://go.dev/play/p/hws_P1Fr2j3)]
 -   **<big>Tuple8</big>** : 8 元元组
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple8)]
+    [[play](https://go.dev/play/p/YA9S0rz3dRz)]
 -   **<big>Tuple8_Unbox</big>** : 返回 8 元元组的字段值。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple8_Unbox)]
+    [[play](https://go.dev/play/p/PRxLBBb4SMl)]
 -   **<big>Zip8</big>** : 创建一个 Tuple8 元组切片, 其中元组的元素和传入切片元素相对应。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Zip8)]
+    [[play](https://go.dev/play/p/8V9jWkuJfaQ)]
 -   **<big>Unzip8</big>** : 根据传入的Tuple8切片，创建一组和Tuple8元素相对应的切片。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Unzip8)]
+    [[play](https://go.dev/play/p/1SndOwGsZB4)]
 -   **<big>Tuple9</big>** : 9 元元组
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple9)]
+    [[play](https://go.dev/play/p/yS2NGGtZpQr)]
 -   **<big>Tuple9_Unbox</big>** : 返回 9 元元组的字段值。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple9_Unbox)]
+    [[play](https://go.dev/play/p/oFJFGTAuOa8)]
 -   **<big>Zip9</big>** : 创建一个 Tuple9 元组切片, 其中元组的元素和传入切片元素相对应。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Zip9)]
+    [[play](https://go.dev/play/p/cgsL15QYnfz)]
 -   **<big>Unzip9</big>** : 根据传入的Tuple9切片，创建一组和Tuple9元素相对应的切片。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Unzip9)]
+    [[play](https://go.dev/play/p/91-BU_KURSA)]
 -   **<big>Tuple10</big>** : 10 元元组
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple10)]
+    [[play](https://go.dev/play/p/799qqZg0hUv)]
 -   **<big>Tuple10_Unbox</big>** : 返回 10 元元组的字段值。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Tuple10_Unbox)]
+    [[play](https://go.dev/play/p/qfyx3x_X0Cu)]
 -   **<big>Zip10</big>** : 创建一个 Tuple10 元组切片, 其中元组的元素和传入切片元素相对应。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Zip10)]
+    [[play](https://go.dev/play/p/YSR-2cXnrY4)]
 -   **<big>Unzip10</big>** : 根据传入的Tuple10切片，创建一组和Tuple10元素相对应的切片。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/tuple_zh-CN.md#Unzip10)]
+    [[play](https://go.dev/play/p/-taQB6Wfre_z)]
+
 
 <h3 id="Validator"> 24. validator 验证器包，包含常用字符串格式验证函数。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>
 

cryptor/basic.go

@@ -40,8 +40,8 @@ func Md5String(s string) string {
 	return hex.EncodeToString(h.Sum(nil))
 }
 
-// Md5String return the md5 string of byte slice.
+// Md5Byte return the md5 string of byte slice.
-// Play: todo
+// Play: https://go.dev/play/p/suraalH8lyC
 func Md5Byte(data []byte) string {
 	h := md5.New()
 	h.Write(data)

datetime/datetime.go

@@ -97,13 +97,13 @@ func GetNowDateTime() string {
 }
 
 // GetTodayStartTime return the start time of today, format: yyyy-mm-dd 00:00:00.
-// Play: todo
+// Play: https://go.dev/play/p/84siyYF7t99
 func GetTodayStartTime() string {
 	return time.Now().Format("2006-01-02") + " 00:00:00"
 }
 
 // GetTodayEndTime return the end time of today, format: yyyy-mm-dd 23:59:59.
-// Play: todo
+// Play: https://go.dev/play/p/jjrLnfoqgn3
 func GetTodayEndTime() string {
 	return time.Now().Format("2006-01-02") + " 23:59:59"
 }

docs/datetime_zh-CN.md

@@ -717,7 +717,7 @@ func main() {
 
 ### <span id="GetTodayStartTime">GetTodayStartTime</span>
 
-<p>返回当天开始时间， 格式: yyyy-mm-dd 00:00:00.</p>
+<p>返回当天开始时间， 格式: yyyy-mm-dd 00:00:00。</p>
 
 <b>函数签名:</b>
 
@@ -746,7 +746,7 @@ func main() {
 
 ### <span id="GetTodayEndTime">GetTodayEndTime</span>
 
-<p>返回当天结束时间，格式: yyyy-mm-dd 23:59:59.</p>
+<p>返回当天结束时间，格式: yyyy-mm-dd 23:59:59。</p>
 
 <b>函数签名:</b>
 

docs/fileutil.md

@@ -108,7 +108,7 @@ func main() {
 
 ### <span id="CreateDir">CreateDir</span>
 
-<p>Create directory in absolute path. param `absPath` like /a/, /a/b/.</p>
+<p>Create directory in absolute path. param `absPath` like /a, /a/b.</p>
 
 <b>Signature:</b>
 
@@ -127,7 +127,7 @@ import (
 )
 
 func main() {
-    err := fileutil.CreateDir("/a/")
+    err := fileutil.CreateDir("/a/b") // will create folder /a/b
     fmt.Println(err)
 }
 ```

docs/fileutil_zh-CN.md

@@ -108,7 +108,7 @@ func main() {
 
 ### <span id="CreateDir">CreateDir</span>
 
-<p>使用绝对路径创建嵌套目录，例如/a/, /a/b/</p>
+<p>使用绝对路径创建嵌套目录，例如/a/, /a/b</p>
 
 <b>函数签名:</b>
 
@@ -127,7 +127,7 @@ import (
 )
 
 func main() {
-    err := fileutil.CreateDir("/a/")
+    err := fileutil.CreateDir("/a/b") // will create folder /a/b
     fmt.Println(err)
 }
 ```

docs/maputil.md

@@ -43,6 +43,7 @@ import (
 -   [Merge](#Merge)
 -   [Minus](#Minus)
 -   [IsDisjoint](#IsDisjoint)
+-   [HasKey](#HasKey)
 
 <div STYLE="page-break-after: always;"></div>
 
@@ -893,7 +894,7 @@ func main() {
 
 ### <span id="IsDisjoint">IsDisjoint</span>
 
-<p>Checks two maps are disjoint if they have no keys in common</p>
+<p>Checks two maps are disjoint if they have no keys in common.</p>
 
 <b>Signature:</b>
 
@@ -937,3 +938,49 @@ func main() {
     // false
 }
 ```
+
+### <span id="HasKey">HasKey</span>
+
+<p>Checks if map has key or not. This function is used to replace the following boilerplate code:</p>
+
+```go
+_, haskey := amap["baz"];
+
+if haskey {
+    fmt.Println("map has key baz")
+}
+```
+
+<b>Signature:</b>
+
+```go
+func HasKey[K comparable, V any](m map[K]V, key K) bool
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/maputil"
+)
+
+func main() {
+    m := map[string]int{
+        "a": 1,
+        "b": 2,
+    }
+
+    result1 := HasKey(m, "a")
+    result2 := HasKey(m, "c")
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+
+    // Output:
+    // true
+    // false
+}
+```

docs/maputil_zh-CN.md

@@ -43,6 +43,7 @@ import (
 -   [Merge](#Merge)
 -   [Minus](#Minus)
 -   [IsDisjoint](#IsDisjoint)
+-   [HasKey](#HasKey)
 
 <div STYLE="page-break-after: always;"></div>
 
@@ -932,3 +933,49 @@ func main() {
     // false
 }
 ```
+
+### <span id="HasKey">HasKey</span>
+
+<p>检查map是否包含某个key。用于代替以下样板代码:</p>
+
+```go
+_, haskey := amap["baz"];
+
+if haskey {
+    fmt.Println("map has key baz")
+}
+```
+
+<b>函数签名:</b>
+
+```go
+func HasKey[K comparable, V any](m map[K]V, key K) bool
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/maputil"
+)
+
+func main() {
+    m := map[string]int{
+        "a": 1,
+        "b": 2,
+    }
+
+    result1 := HasKey(m, "a")
+    result2 := HasKey(m, "c")
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+
+    // Output:
+    // true
+    // false
+}
+```

docs/slice.md

@@ -90,6 +90,7 @@ import (
 -   [UpdateAt](#UpdateAt)
 -   [Without](#Without)
 -   [KeyBy](#KeyBy)
+-   [Join](#Join)
 
 <div STYLE="page-break-after: always;"></div>
 
@@ -2417,3 +2418,36 @@ func main() {
     // map[1:a 2:ab 3:abc]
 }
 ```
+
+### <span id="Join">Join</span>
+
+<p>Join the slice item with specify separator.</p>
+
+<b>Signature:</b>
+
+```go
+func Join[T any](s []T, separator string) string
+```
+
+<b>Example:</b>
+
+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/slice"
+)
+
+func main() {
+    nums := []int{1, 2, 3, 4, 5}
+
+    result1 := slice.Join(nums, ",")
+    result2 := slice.Join(nums, "-")
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+
+    // Output:
+    // 1,2,3,4,5
+    // 1-2-3-4-5
+}
+```

docs/slice_zh-CN.md

@@ -90,6 +90,7 @@ import (
 -   [UpdateAt](#UpdateAt)
 -   [Without](#Without)
 -   [KeyBy](#KeyBy)
+-   [Join](#Join)
 
 <div STYLE="page-break-after: always;"></div>
 
@@ -2390,7 +2391,7 @@ func main() {
 
 ### <span id="KeyBy">KeyBy</span>
 
-<p>将切片每个元素调用函数后转为map</p>
+<p>将切片每个元素调用函数后转为map。</p>
 
 <b>函数签名:</b>
 
@@ -2417,3 +2418,36 @@ func main() {
     // map[1:a 2:ab 3:abc]
 }
 ```
+
+### <span id="Join">Join</span>
+
+<p>用指定的分隔符链接切片元素。</p>
+
+<b>函数签名:</b>
+
+```go
+func Join[T any](s []T, separator string) string
+```
+
+<b>示例:</b>
+
+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/slice"
+)
+
+func main() {
+    nums := []int{1, 2, 3, 4, 5}
+
+    result1 := slice.Join(nums, ",")
+    result2 := slice.Join(nums, "-")
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+
+    // Output:
+    // 1,2,3,4,5
+    // 1-2-3-4-5
+}
+```

docs/tuple.md

@@ -237,9 +237,9 @@ import (
 )
 
 func main() {
-    t := tuple.NewTuple2(1, 0.1, "a")
+    t := tuple.NewTuple3(1, 0.1, "a")
     v1, v2, v3 := t.Unbox()
-    fmt.Printf("%v %v %v", t.FieldA, t.FieldB, t.FieldC)
+    fmt.Printf("%v %v %v", v1, v2, v3)
 
     // Output: 1 0.1 a
 }
@@ -1134,8 +1134,6 @@ func main() {
     fmt.Printf("%v %v %v %v %v %v %v %v %v %v", v1, v2, v3, v4, v5, v6, v7, v8, v9, v10)
 
     // Output: 1 0.1 a true 2 2.2 b c map[a:1] {a}
-
-    // Output: 1 0.1 a true 2 2.2 b c map[a:1]
 }
 ```
 

docs/tuple_zh-CN.md

@@ -239,7 +239,7 @@ import (
 func main() {
     t := tuple.NewTuple2(1, 0.1, "a")
     v1, v2, v3 := t.Unbox()
-    fmt.Printf("%v %v %v", t.FieldA, t.FieldB, t.FieldC)
+    fmt.Printf("%v %v %v", v1, v2, v3)
 
     // Output: 1 0.1 a
 }
@@ -1134,8 +1134,6 @@ func main() {
     fmt.Printf("%v %v %v %v %v %v %v %v %v %v", v1, v2, v3, v4, v5, v6, v7, v8, v9, v10)
 
     // Output: 1 0.1 a true 2 2.2 b c map[a:1] {a}
-
-    // Output: 1 0.1 a true 2 2.2 b c map[a:1]
 }
 ```
 

fileutil/file.go

@@ -52,7 +52,8 @@ func CreateFile(path string) bool {
 // CreateDir create directory in absolute path. param `absPath` like /a/, /a/b/.
 // Play: https://go.dev/play/p/qUuCe1OGQnM
 func CreateDir(absPath string) error {
-	return os.MkdirAll(path.Dir(absPath), os.ModePerm)
+	// return os.MkdirAll(path.Dir(absPath), os.ModePerm)
+	return os.MkdirAll(absPath, os.ModePerm)
 }
 
 // IsDir checks if the path is directory or not.

fileutil/file_example_test.go

@@ -39,7 +39,7 @@ func ExampleCreateFile() {
 
 func ExampleCreateDir() {
 	pwd, _ := os.Getwd()
-	dirPath := pwd + "/test_xxx/"
+	dirPath := pwd + "/createdir/a/b"
 
 	result1 := IsExist(dirPath)
 
@@ -48,16 +48,22 @@ func ExampleCreateDir() {
 		return
 	}
 
-	result2 := IsExist(dirPath)
+	result2 := IsExist(pwd + "/createdir/")
-
+	result3 := IsExist(pwd + "/createdir/a")
-	os.Remove(dirPath)
+	result4 := IsExist(pwd + "/createdir/a/b")
 
 	fmt.Println(result1)
 	fmt.Println(result2)
+	fmt.Println(result3)
+	fmt.Println(result4)
+
+	os.RemoveAll(pwd + "/createdir/")
 
 	// Output:
 	// false
 	// true
+	// true
+	// true
 }
 
 func ExampleIsDir() {

fileutil/file_test.go

@@ -50,7 +50,7 @@ func TestCreateDir(t *testing.T) {
 		t.FailNow()
 	}
 
-	dirPath := pwd + "/a/"
+	dirPath := pwd + "/a/b"
 	err = CreateDir(dirPath)
 	if err != nil {
 		t.Error(err)
@@ -58,7 +58,9 @@ func TestCreateDir(t *testing.T) {
 	}
 
 	assert.Equal(true, IsExist(dirPath))
-	os.Remove(dirPath)
+
+	os.RemoveAll(pwd + "/a")
+
 	assert.Equal(false, IsExist(dirPath))
 }
 

maputil/map.go

@@ -289,3 +289,21 @@ func MapValues[K comparable, V any, T any](m map[K]V, iteratee func(key K, value
 
 	return result
 }
+
+// HasKey checks if map has key or not.
+// This function is used to replace the following boilerplate code:
+// _, haskey := amap["baz"];
+//
+//	if haskey {
+//	   fmt.Println("map has key baz")
+//	}
+//
+// Play: todo
+func HasKey[K comparable, V any](m map[K]V, key K) bool {
+	_, haskey := m[key]
+	if haskey {
+		return true
+	}
+
+	return false
+}

maputil/map_example_test.go

@@ -433,3 +433,20 @@ func ExampleMapTo() {
 	// <nil>
 	// {Nothin 28 123456789 {test 1}}
 }
+
+func ExampleHasKey() {
+	m := map[string]int{
+		"a": 1,
+		"b": 2,
+	}
+
+	result1 := HasKey(m, "a")
+	result2 := HasKey(m, "c")
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+
+	// Output:
+	// true
+	// false
+}

maputil/map_test.go

@@ -458,3 +458,17 @@ func TestMapValues(t *testing.T) {
 
 	assert.Equal(expected, result)
 }
+
+func TestHasKey(t *testing.T) {
+	t.Parallel()
+
+	assert := internal.NewAssert(t, "TestHasKey")
+
+	m := map[string]int{
+		"a": 1,
+		"b": 2,
+	}
+
+	assert.Equal(true, HasKey(m, "a"))
+	assert.Equal(false, HasKey(m, "c"))
+}

slice/slice.go

@@ -9,6 +9,7 @@ import (
 	"math/rand"
 	"reflect"
 	"sort"
+	"strings"
 	"time"
 
 	"golang.org/x/exp/constraints"
@@ -436,8 +437,8 @@ func flattenRecursive(value reflect.Value, result reflect.Value) reflect.Value {
 // ForEach iterates over elements of slice and invokes function for each element.
 // Play: https://go.dev/play/p/DrPaa4YsHRF
 func ForEach[T any](slice []T, iteratee func(index int, item T)) {
-	for i, v := range slice {
+	for i := 0; i < len(slice); i++ {
-		iteratee(i, v)
+		iteratee(i, slice[i])
 	}
 }
 
@@ -445,8 +446,8 @@ func ForEach[T any](slice []T, iteratee func(index int, item T)) {
 // when iteratee return false, will break the for each loop.
 // Play: https://go.dev/play/p/qScs39f3D9W
 func ForEachWithBreak[T any](slice []T, iteratee func(index int, item T) bool) {
-	for i, v := range slice {
+	for i := 0; i < len(slice); i++ {
-		if !iteratee(i, v) {
+		if !iteratee(i, slice[i]) {
 			break
 		}
 	}
@@ -457,8 +458,8 @@ func ForEachWithBreak[T any](slice []T, iteratee func(index int, item T) bool) {
 func Map[T any, U any](slice []T, iteratee func(index int, item T) U) []U {
 	result := make([]U, len(slice), cap(slice))
 
-	for i, v := range slice {
+	for i := 0; i < len(slice); i++ {
-		result[i] = iteratee(i, v)
+		result[i] = iteratee(i, slice[i])
 	}
 
 	return result
@@ -1188,3 +1189,13 @@ func KeyBy[T any, U comparable](slice []T, iteratee func(item T) U) map[U]T {
 
 	return result
 }
+
+// Join the slice item with specify separator.
+// Play: todo
+func Join[T any](s []T, separator string) string {
+	str := Map(s, func(_ int, item T) string {
+		return fmt.Sprint(item)
+	})
+
+	return strings.Join(str, separator)
+}

slice/slice_example_test.go

@@ -1032,3 +1032,17 @@ func ExampleKeyBy() {
 	// Output:
 	// map[1:a 2:ab 3:abc]
 }
+
+func ExampleJoin() {
+	nums := []int{1, 2, 3, 4, 5}
+
+	result1 := Join(nums, ",")
+	result2 := Join(nums, "-")
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+
+	// Output:
+	// 1,2,3,4,5
+	// 1-2-3-4-5
+}

slice/slice_test.go

@@ -1161,3 +1161,17 @@ func TestRepeat(t *testing.T) {
 	assert.Equal([]string{}, Repeat("a", 0))
 	assert.Equal([]string{"a", "a", "a", "a", "a", "a"}, Repeat("a", 6))
 }
+
+func TestJoin(t *testing.T) {
+	t.Parallel()
+
+	assert := internal.NewAssert(t, "TestJoin")
+
+	nums := []int{1, 2, 3, 4, 5}
+
+	result1 := Join(nums, ",")
+	result2 := Join(nums, "-")
+
+	assert.Equal("1,2,3,4,5", result1)
+	assert.Equal("1-2-3-4-5", result2)
+}

tuple/tuple.go

@@ -13,19 +13,19 @@ type Tuple2[A any, B any] struct {
 }
 
 // Unbox returns values in tuple.
-// Play: todo
+// Play: https://go.dev/play/p/0fD1qfCVwjm
 func (t Tuple2[A, B]) Unbox() (A, B) {
 	return t.FieldA, t.FieldB
 }
 
 // NewTuple2 creates a 2 elemnets tuple from a list of values.
-// Play: todo
+// Play: https://go.dev/play/p/3sHVqBQpLYN
 func NewTuple2[A any, B any](a A, b B) Tuple2[A, B] {
 	return Tuple2[A, B]{FieldA: a, FieldB: b}
 }
 
 // Zip2 create a slice of Tuple2, whose elements are correspond to the given slice elements.
-// Play: todo
+// Play: https://go.dev/play/p/4ncWJJ77Xio
 func Zip2[A any, B any](a []A, b []B) []Tuple2[A, B] {
 	size := mathutil.Max(len(a), len(b))
 
@@ -42,7 +42,7 @@ func Zip2[A any, B any](a []A, b []B) []Tuple2[A, B] {
 }
 
 // Unzip2 creates a group of slice from a slice of Tuple2.
-// Play: todo
+// Play: https://go.dev/play/p/KBecr60feXb
 func Unzip2[A any, B any](tuples []Tuple2[A, B]) ([]A, []B) {
 	size := len(tuples)
 
@@ -65,19 +65,19 @@ type Tuple3[A any, B any, C any] struct {
 }
 
 // Unbox returns values in tuple.
-// Play: todo
+// Play: https://go.dev/play/p/YojLy-id1BS
 func (t Tuple3[A, B, C]) Unbox() (A, B, C) {
 	return t.FieldA, t.FieldB, t.FieldC
 }
 
 // NewTuple3 creates a 3 elemnets tuple from a list of values.
-// Play: todo
+// Play: https://go.dev/play/p/FtH2sdCLlCf
 func NewTuple3[A any, B any, C any](a A, b B, c C) Tuple3[A, B, C] {
 	return Tuple3[A, B, C]{FieldA: a, FieldB: b, FieldC: c}
 }
 
 // Zip3 create a slice of Tuple3, whose elements are correspond to the given slice elements.
-// Play: todo
+// Play: https://go.dev/play/p/97NgmsTILfu
 func Zip3[A any, B any, C any](a []A, b []B, c []C) []Tuple3[A, B, C] {
 	size := mathutil.Max(len(a), len(b), len(c))
 
@@ -95,7 +95,7 @@ func Zip3[A any, B any, C any](a []A, b []B, c []C) []Tuple3[A, B, C] {
 }
 
 // Unzip3 creates a group of slice from a slice of Tuple3.
-// Play: todo
+// Play: https://go.dev/play/p/bba4cpAa7KO
 func Unzip3[A any, B any, C any](tuples []Tuple3[A, B, C]) ([]A, []B, []C) {
 	size := len(tuples)
 
@@ -121,19 +121,19 @@ type Tuple4[A any, B any, C any, D any] struct {
 }
 
 // Unbox returns values in tuple.
-// Play: todo
+// Play: https://go.dev/play/p/ACj9YuACGgW
 func (t Tuple4[A, B, C, D]) Unbox() (A, B, C, D) {
 	return t.FieldA, t.FieldB, t.FieldC, t.FieldD
 }
 
 // NewTuple4 creates a 4 elemnets tuple from a list of values.
-// Play: todo
+// Play: https://go.dev/play/p/D2EqDz096tk
 func NewTuple4[A any, B any, C any, D any](a A, b B, c C, d D) Tuple4[A, B, C, D] {
 	return Tuple4[A, B, C, D]{FieldA: a, FieldB: b, FieldC: c, FieldD: d}
 }
 
 // Zip4 create a slice of Tuple4, whose elements are correspond to the given slice elements.
-// Play: todo
+// Play: https://go.dev/play/p/PEmTYVK5hL4
 func Zip4[A any, B any, C any, D any](a []A, b []B, c []C, d []D) []Tuple4[A, B, C, D] {
 	size := mathutil.Max(len(a), len(b), len(c), len(d))
 
@@ -152,7 +152,7 @@ func Zip4[A any, B any, C any, D any](a []A, b []B, c []C, d []D) []Tuple4[A, B,
 }
 
 // Unzip4 creates a group of slice from a slice of Tuple4.
-// Play: todo
+// Play: https://go.dev/play/p/rb8z4gyYSRN
 func Unzip4[A any, B any, C any, D any](tuples []Tuple4[A, B, C, D]) ([]A, []B, []C, []D) {
 	size := len(tuples)
 
@@ -181,19 +181,19 @@ type Tuple5[A any, B any, C any, D any, E any] struct {
 }
 
 // Unbox returns values in tuple.
-// Play: todo
+// Play: https://go.dev/play/p/GyIyZHjCvoS
 func (t Tuple5[A, B, C, D, E]) Unbox() (A, B, C, D, E) {
 	return t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE
 }
 
 // NewTuple5 creates a 5 elemnets tuple from a list of values.
-// Play: todo
+// Play: https://go.dev/play/p/2WndmVxPg-r
 func NewTuple5[A any, B any, C any, D any, E any](a A, b B, c C, d D, e E) Tuple5[A, B, C, D, E] {
 	return Tuple5[A, B, C, D, E]{FieldA: a, FieldB: b, FieldC: c, FieldD: d, FieldE: e}
 }
 
 // Zip5 create a slice of Tuple5, whose elements are correspond to the given slice elements.
-// Play: todo
+// Play: https://go.dev/play/p/fCAAJLMfBIP
 func Zip5[A any, B any, C any, D any, E any](a []A, b []B, c []C, d []D, e []E) []Tuple5[A, B, C, D, E] {
 	size := mathutil.Max(len(a), len(b), len(c), len(d), len(e))
 
@@ -215,7 +215,7 @@ func Zip5[A any, B any, C any, D any, E any](a []A, b []B, c []C, d []D, e []E)
 }
 
 // Unzip5 creates a group of slice from a slice of Tuple5.
-// Play: todo
+// Play: https://go.dev/play/p/gyl6vKfhqPb
 func Unzip5[A any, B any, C any, D any, E any](tuples []Tuple5[A, B, C, D, E]) ([]A, []B, []C, []D, []E) {
 	size := len(tuples)
 
@@ -247,19 +247,19 @@ type Tuple6[A any, B any, C any, D any, E any, F any] struct {
 }
 
 // Unbox returns values in tuple.
-// Play: todo
+// Play: https://go.dev/play/p/FjIHV7lpxmW
 func (t Tuple6[A, B, C, D, E, F]) Unbox() (A, B, C, D, E, F) {
 	return t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF
 }
 
 // NewTuple6 creates a 6 elemnets tuple from a list of values.
-// Play: todo
+// Play: https://go.dev/play/p/VjqcCwEJZbs
 func NewTuple6[A any, B any, C any, D any, E any, F any](a A, b B, c C, d D, e E, f F) Tuple6[A, B, C, D, E, F] {
 	return Tuple6[A, B, C, D, E, F]{FieldA: a, FieldB: b, FieldC: c, FieldD: d, FieldE: e, FieldF: f}
 }
 
 // Zip6 create a slice of Tuple6, whose elements are correspond to the given slice elements.
-// Play: todo
+// Play: https://go.dev/play/p/oWPrnUYuFHo
 func Zip6[A any, B any, C any, D any, E any, F any](a []A, b []B, c []C, d []D, e []E, f []F) []Tuple6[A, B, C, D, E, F] {
 	size := mathutil.Max(len(a), len(b), len(c), len(d), len(e), len(f))
 
@@ -282,7 +282,7 @@ func Zip6[A any, B any, C any, D any, E any, F any](a []A, b []B, c []C, d []D,
 }
 
 // Unzip6 creates a group of slice from a slice of Tuple6.
-// Play: todo
+// Play: https://go.dev/play/p/l41XFqCyh5E
 func Unzip6[A any, B any, C any, D any, E any, F any](tuples []Tuple6[A, B, C, D, E, F]) ([]A, []B, []C, []D, []E, []F) {
 	size := len(tuples)
 
@@ -317,19 +317,19 @@ type Tuple7[A any, B any, C any, D any, E any, F any, G any] struct {
 }
 
 // Unbox returns values in tuple.
-// Play: todo
+// Play: https://go.dev/play/p/R9I8qeDk0zs
 func (t Tuple7[A, B, C, D, E, F, G]) Unbox() (A, B, C, D, E, F, G) {
 	return t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF, t.FieldG
 }
 
 // NewTuple7 creates a 7 elemnets tuple from a list of values.
-// Play: todo
+// Play: https://go.dev/play/p/dzAgv_Ezub9
 func NewTuple7[A any, B any, C any, D any, E any, F any, G any](a A, b B, c C, d D, e E, f F, g G) Tuple7[A, B, C, D, E, F, G] {
 	return Tuple7[A, B, C, D, E, F, G]{FieldA: a, FieldB: b, FieldC: c, FieldD: d, FieldE: e, FieldF: f, FieldG: g}
 }
 
 // Zip7 create a slice of Tuple7, whose elements are correspond to the given slice elements.
-// Play: todo
+// Play: https://go.dev/play/p/WUJuo897Egf
 func Zip7[A any, B any, C any, D any, E any, F any, G any](a []A, b []B, c []C, d []D, e []E, f []F, g []G) []Tuple7[A, B, C, D, E, F, G] {
 	size := mathutil.Max(len(a), len(b), len(c), len(d), len(e), len(f), len(g))
 
@@ -354,7 +354,7 @@ func Zip7[A any, B any, C any, D any, E any, F any, G any](a []A, b []B, c []C,
 }
 
 // Unzip7 creates a group of slice from a slice of Tuple7.
-// Play: todo
+// Play: https://go.dev/play/p/hws_P1Fr2j3
 func Unzip7[A any, B any, C any, D any, E any, F any, G any](tuples []Tuple7[A, B, C, D, E, F, G]) ([]A, []B, []C, []D, []E, []F, []G) {
 	size := len(tuples)
 
@@ -392,19 +392,19 @@ type Tuple8[A any, B any, C any, D any, E any, F any, G any, H any] struct {
 }
 
 // Unbox returns values in tuple.
-// Play: todo
+// Play: https://go.dev/play/p/PRxLBBb4SMl
 func (t Tuple8[A, B, C, D, E, F, G, H]) Unbox() (A, B, C, D, E, F, G, H) {
 	return t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF, t.FieldG, t.FieldH
 }
 
 // NewTuple8 creates a 8 elemnets tuple from a list of values.
-// Play: todo
+// Play: https://go.dev/play/p/YA9S0rz3dRz
 func NewTuple8[A any, B any, C any, D any, E any, F any, G any, H any](a A, b B, c C, d D, e E, f F, g G, h H) Tuple8[A, B, C, D, E, F, G, H] {
 	return Tuple8[A, B, C, D, E, F, G, H]{FieldA: a, FieldB: b, FieldC: c, FieldD: d, FieldE: e, FieldF: f, FieldG: g, FieldH: h}
 }
 
 // Zip8 create a slice of Tuple8, whose elements are correspond to the given slice elements.
-// Play: todo
+// Play: https://go.dev/play/p/8V9jWkuJfaQ
 func Zip8[A any, B any, C any, D any, E any, F any, G any, H any](a []A, b []B, c []C, d []D, e []E, f []F, g []G, h []H) []Tuple8[A, B, C, D, E, F, G, H] {
 	size := mathutil.Max(len(a), len(b), len(c), len(d), len(e), len(f), len(g), len(h))
 
@@ -430,7 +430,7 @@ func Zip8[A any, B any, C any, D any, E any, F any, G any, H any](a []A, b []B,
 }
 
 // Unzip8 creates a group of slice from a slice of Tuple8.
-// Play: todo
+// Play: https://go.dev/play/p/1SndOwGsZB4
 func Unzip8[A any, B any, C any, D any, E any, F any, G any, H any](tuples []Tuple8[A, B, C, D, E, F, G, H]) ([]A, []B, []C, []D, []E, []F, []G, []H) {
 	size := len(tuples)
 
@@ -471,19 +471,19 @@ type Tuple9[A any, B any, C any, D any, E any, F any, G any, H any, I any] struc
 }
 
 // Unbox returns values in tuple.
-// Play: todo
+// Play: https://go.dev/play/p/oFJFGTAuOa8
 func (t Tuple9[A, B, C, D, E, F, G, H, I]) Unbox() (A, B, C, D, E, F, G, H, I) {
 	return t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF, t.FieldG, t.FieldH, t.FieldI
 }
 
 // NewTuple9 creates a 9 elemnets tuple from a list of values.
-// Play: todo
+// Play: https://go.dev/play/p/yS2NGGtZpQr
 func NewTuple9[A any, B any, C any, D any, E any, F any, G any, H any, I any](a A, b B, c C, d D, e E, f F, g G, h H, i I) Tuple9[A, B, C, D, E, F, G, H, I] {
 	return Tuple9[A, B, C, D, E, F, G, H, I]{FieldA: a, FieldB: b, FieldC: c, FieldD: d, FieldE: e, FieldF: f, FieldG: g, FieldH: h, FieldI: i}
 }
 
 // Zip9 create a slice of Tuple9, whose elements are correspond to the given slice elements.
-// Play: todo
+// Play: https://go.dev/play/p/cgsL15QYnfz
 func Zip9[A any, B any, C any, D any, E any, F any, G any, H any, I any](a []A, b []B, c []C, d []D, e []E, f []F, g []G, h []H, i []I) []Tuple9[A, B, C, D, E, F, G, H, I] {
 	size := mathutil.Max(len(a), len(b), len(c), len(d), len(e), len(f), len(g), len(h), len(i))
 
@@ -510,7 +510,7 @@ func Zip9[A any, B any, C any, D any, E any, F any, G any, H any, I any](a []A,
 }
 
 // Unzip9 creates a group of slice from a slice of Tuple9.
-// Play: todo
+// Play: https://go.dev/play/p/91-BU_KURSA
 func Unzip9[A any, B any, C any, D any, E any, F any, G any, H any, I any](tuples []Tuple9[A, B, C, D, E, F, G, H, I]) ([]A, []B, []C, []D, []E, []F, []G, []H, []I) {
 	size := len(tuples)
 
@@ -554,19 +554,19 @@ type Tuple10[A any, B any, C any, D any, E any, F any, G any, H any, I any, J an
 }
 
 // Unbox returns values in tuple.
-// Play: todo
+// Play: https://go.dev/play/p/qfyx3x_X0Cu
 func (t Tuple10[A, B, C, D, E, F, G, H, I, J]) Unbox() (A, B, C, D, E, F, G, H, I, J) {
 	return t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF, t.FieldG, t.FieldH, t.FieldI, t.FieldJ
 }
 
 // NewTuple10 creates a 10 elemnets tuple from a list of values.
-// Play: todo
+// Play: https://go.dev/play/p/799qqZg0hUv
 func NewTuple10[A any, B any, C any, D any, E any, F any, G any, H any, I any, J any](a A, b B, c C, d D, e E, f F, g G, h H, i I, j J) Tuple10[A, B, C, D, E, F, G, H, I, J] {
 	return Tuple10[A, B, C, D, E, F, G, H, I, J]{FieldA: a, FieldB: b, FieldC: c, FieldD: d, FieldE: e, FieldF: f, FieldG: g, FieldH: h, FieldI: i, FieldJ: j}
 }
 
 // Zip10 create a slice of Tuple10, whose elements are correspond to the given slice elements.
-// Play: todo
+// Play: https://go.dev/play/p/YSR-2cXnrY4
 func Zip10[A any, B any, C any, D any, E any, F any, G any, H any, I any, J any](a []A, b []B, c []C, d []D, e []E, f []F, g []G, h []H, i []I, j []J) []Tuple10[A, B, C, D, E, F, G, H, I, J] {
 	size := mathutil.Max(len(a), len(b), len(c), len(d), len(e), len(f), len(g), len(h), len(i), len(j))
 
@@ -595,7 +595,7 @@ func Zip10[A any, B any, C any, D any, E any, F any, G any, H any, I any, J any]
 }
 
 // Unzip10 creates a group of slice from a slice of Tuple10.
-// Play: todo
+// Play: https://go.dev/play/p/-taQB6Wfre_z
 func Unzip10[A any, B any, C any, D any, E any, F any, G any, H any, I any, J any](tuples []Tuple10[A, B, C, D, E, F, G, H, I, J]) ([]A, []B, []C, []D, []E, []F, []G, []H, []I, []J) {
 	size := len(tuples)