## assignIn extend + [link](./assignIn "Link to this entry.") + [source](https://github.com/lodash/lodash/blob/4.5.0正式版/lodash.src.js#L10736 "View in source.") + [npm](https://www.npmjs.com/package/lodash.assignin "See the npm package.") ``` _.assignIn(object, [sources]) ``` 這個方法類似 `_.assign`。 除了它會遍歷并繼承來源對象的屬性。 **注意:** 這方法會改變源對象 ### 參數 1. object (Object) 目標對象 2. [sources] (...Object) 來源對象 ### 返回值 (Object) 返回對象 ### 示例 ``` function Foo() { this.b = 2; } function Bar() { this.d = 4; } Foo.prototype.c = 3; Bar.prototype.e = 5; _.assignIn({ 'a': 1 }, new Foo, new Bar); // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4, 'e': 5 } ```