> For the complete documentation index, see [llms.txt](https://lodash.shujuwajue.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lodash.shujuwajue.com/array/lastindexof.md).

# \_.lastIndexOf（获取元素的索引值）

**语法：**

```javascript
_.lastIndexOf(array, value, [fromIndex=array.length-1])
```

**源代码链接：**[source](https://github.com/lodash/lodash/blob/4.17.10/lodash.js#L7635)

**npm包链接：**[npm package](https://www.npmjs.com/package/lodash.lastindexof)

**描述：**

这个方法类似[`_.indexOf`](https://lodash.com/docs/4.17.10#indexOf)，区别是它是从右到左遍历`array`的元素。

**开始版本：**0.1.0

**参数：**

* `array (Array)`: 要搜索的数组。
* `value (*)`: 要搜索的值。
* `[fromIndex=array.length-1] (number)`: 开始搜索的索引值。 

**返回值：**

* `(number)`: 返回匹配值的索引值，否则返回 -1。

**例子：**

```javascript
_.lastIndexOf([1, 2, 1, 2], 2);
// => 3

// Search from the `fromIndex`.
_.lastIndexOf([1, 2, 1, 2], 2, 2);
// => 1
```


---

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