## keys + [link](./keys "Link to this entry.") + [source](https://github.com/lodash/lodash/blob/4.5.0正式版/lodash.src.js#L11332 "View in source.") + [npm](https://www.npmjs.com/package/lodash.keys "See the npm package.") ``` _.keys(object) ``` 創建 `object` 自身可枚舉屬性名為一個數組。 **注意:** 非對象的值會被強制轉換為對象，查看 [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys) 了解詳情 ### 參數 1. object (Object) 要檢索的對象 ### 返回值 (Array) 返回包含屬性名的數組 ### 示例 ``` function Foo() { this.a = 1; this.b = 2; } Foo.prototype.c = 3; _.keys(new Foo); // => ['a', 'b'] (無法保證遍歷的順序) _.keys('hi'); // => ['0', '1'] ```