[TOC] ~~~ let arr = [2, 5, -10, 15] let [x, y] = arr; ~~~ x就是2, y就是5 **如果要跳過呢** ~~~ let [,,a,b] = arr a -10 b ~~~ **除了第一個以外剩下的** rest就是新數組 ~~~ let [,...rest] = arr rest (3)?[5, -10, 15] ~~~ **支持對象** ~~~ let p = {name:"jack", age:21} //需要屬性名, 名字不能亂起 let {name, age} = p; name "jack" age 21 ~~~ 如果要別名 `屬性名:別名` ~~~ let {name:n} = p n "jack" ~~~ **對象嵌套,雙重解析** ~~~ p = {name:"jack", age:21, girl: {name: "rose", age:18}} let {girl:{name}} = p name "rose" ~~~ **對象除了第一個以外剩下的** obj和p是對象的深層拷貝 ~~~ let {...obj} = p obj {name: "jack", age: 21, girl: {…}} ~~~