数组，对象解构

数组解构

var names = ["abc", "cba", undefined, "nba", "mba"]

1. 基本使用

　　var [name1, name2, name3] = names

2. 顺序问题: 严格的顺序

　　var [name1, , name3] = names

3. 解构出数组

　　var [name1, name2, ...newNames] = names

4. 解构的默认值

   var [name1, name2, name3 = "default"] = names

    

对象解构

var obj = { name: "why", age: 18, height: 1.88 }

1. 基本使用

   var { name, age, height } = obj

2. 顺序问题

   var { height, name, age } = obj

3. 对变量进行重命名

   var { height: wHeight, name: wName, age: wAge } = obj

4. 默认值

   var { height: wHeight, name: wName, age: wAge, address: wAddress = "中国"} = obj

5. 对象的剩余内容

   var { name,age,...newObj} = obj