# 數組的解構 數組的解構要按照順序來執行. ``` var [a, b] = [1, 2]; console.log(a); console.log(b); ``` ### 默認值 ``` var [a, b = 10, c] = [1, , 3]; console.log(a); console.log(b); console.log(c); ``` # 對象的解構 對象的解構不需要按照順序來執行. ``` let {foo, bar} = {bar: 'hello', foo: 'world'}; console.log(foo); console.log(bar); ``` ### 對象屬性別名 ``` let {foo: abc, bar} = {bar: 'hello', foo: 'world'}; //如果有了別名,那么foo就無效了 console.log(abc); console.log(bar); ``` ### 獲取對象的方法 ``` let {length} = 'hello'; console.log(length); //5 ``` # 字符串解構 ``` let [a, b, c, d] = 'hello'; console.log(a); //h console.log(b); //e console.log(c); //l console.log(typeof d); //string類型 ```