From bdbc06b095faa959bf893c3e1c027cb4d91d595d Mon Sep 17 00:00:00 2001
From: dudaodong <lanliddd.2007@163.com>
Date: Wed, 18 May 2022 15:00:09 +0800
Subject: [PATCH] docs: add doc for funcs IndexOf and LastIndexOf

---
 docs/slice.md       | 59 +++++++++++++++++++++++++++++++++++++++++++++
 docs/slice_zh-CN.md | 58 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 117 insertions(+)

diff --git a/docs/slice.md b/docs/slice.md
index 98ee5a2..145294a 100644
--- a/docs/slice.md
+++ b/docs/slice.md
@@ -44,6 +44,8 @@ import (
 - [InterfaceSlice](#InterfaceSlice)
 - [Intersection](#Intersection)
 - [InsertAt](#InsertAt)
+- [IndexOf](#IndexOf)
+- [LastIndexOf](#LastIndexOf)
 - [Map](#Map)
 - [Reverse](#Reverse)
 - [Reduce](#Reduce)
@@ -704,6 +706,63 @@ func main() {
 
 
 
+### <span id="IndexOf">IndexOf</span>
+<p>Returns the index at which the first occurrence of a value is found in a slice or return -1 if the value cannot be found.</p>
+
+<b>Signature:</b>
+
+```go
+func IndexOf[T any](slice []T, value T) int
+```
+<b>Example:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/v2/slice"
+)
+
+func main() {
+	arr := []string{"a", "a", "b", "c"}
+	res1 := slice.IndexOf(arr, "a")
+	fmt.Println(res1) //0
+
+	res2 := slice.IndexOf(arr, "d")
+	fmt.Println(res2) //-1
+}
+```
+
+
+
+### <span id="LastIndexOf">LastIndexOf</span>
+<p>Returns the index at which the last occurrence of a value is found in a slice or return -1 if the value cannot be found.</p>
+
+<b>Signature:</b>
+
+```go
+func LastIndexOf[T any](slice []T, value T) int
+```
+<b>Example:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/v2/slice"
+)
+
+func main() {
+	arr := []string{"a", "a", "b", "c"}
+	res1 := slice.LastIndexOf(arr, "a")
+	fmt.Println(res1) //1
+
+	res2 := slice.LastIndexOf(arr, "d")
+	fmt.Println(res2) //-1
+}
+```
+
+
+
+
 ### <span id="Map">Map</span>
 <p>Creates an slice of values by running each element in slice thru function.</p>
 
diff --git a/docs/slice_zh-CN.md b/docs/slice_zh-CN.md
index 3c1ba8f..0521bdd 100644
--- a/docs/slice_zh-CN.md
+++ b/docs/slice_zh-CN.md
@@ -44,6 +44,8 @@ import (
 - [InterfaceSlice](#InterfaceSlice)
 - [Intersection](#Intersection)
 - [InsertAt](#InsertAt)
+- [IndexOf](#IndexOf)
+- [LastIndexOf](#LastIndexOf)
 - [Map](#Map)
 - [Reverse](#Reverse)
 - [Reduce](#Reduce)
@@ -704,6 +706,62 @@ func main() {
 
 
 
+### <span id="IndexOf">IndexOf</span>
+<p>返回在切片中找到值的第一个匹配项的索引，如果找不到值，则返回-1</p>
+
+<b>函数签名:</b>
+
+```go
+func IndexOf[T any](slice []T, value T) int
+```
+<b>例子:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/v2/slice"
+)
+
+func main() {
+	arr := []string{"a", "a", "b", "c"}
+	res1 := slice.IndexOf(arr, "a")
+	fmt.Println(res1) //0
+
+	res2 := slice.IndexOf(arr, "d")
+	fmt.Println(res2) //-1
+}
+```
+
+
+
+### <span id="LastIndexOf">LastIndexOf</span>
+<p>返回在切片中找到最后一个值的索引，如果找不到该值，则返回-1</p>
+
+<b>函数签名:</b>
+
+```go
+func LastIndexOf[T any](slice []T, value T) int
+```
+<b>例子:</b>
+
+```go
+import (
+	"fmt"
+	"github.com/duke-git/lancet/v2/slice"
+)
+
+func main() {
+	arr := []string{"a", "a", "b", "c"}
+	res1 := slice.LastIndexOf(arr, "a")
+	fmt.Println(res1) //1
+
+	res2 := slice.LastIndexOf(arr, "d")
+	fmt.Println(res2) //-1
+}
+```
+
+
+
 ### <span id="Map">Map</span>
 <p>通过运行函数slice中的每个元素来创建一个新切片</p>