# \_.sortBy（数组或对象排序）

**语法：**

```javascript
_.sortBy(collection, [iteratees=[_.identity]])
```

**源代码链接：**[source](https://github.com/lodash/lodash/blob/4.17.10/lodash.js#L9929)

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

**描述：**

创建一个元素数组。 以 iteratee 处理的结果升序排序。 这个方法执行稳定排序，也就是说相同元素会保持原始排序。 iteratees 调用1个参数：*(value)*。

**开始版本：**0.1.0

**参数：**

* `collection (Array|Object)`: 用来迭代的集合。
* `[iteratees=[_.identity]] (...* (Array|Array[]|Function|Function[]|Object|Object[]|string|string[]))`: 这个函数决定排序。

**返回值：**

* `(Array)`: 返回排序后的数组。

**例子：**

```javascript
var users = [
  { 'user': 'fred',   'age': 48 },
  { 'user': 'barney', 'age': 36 },
  { 'user': 'fred',   'age': 40 },
  { 'user': 'barney', 'age': 34 }
];

_.sortBy(users, [function(o) { return o.user; }]);
// => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]

_.sortBy(users, ['user', 'age']);
// => objects for [['barney', 34], ['barney', 36], ['fred', 40], ['fred', 48]]
```


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