es6应用篇

1.（...）展开运算符合并数组，数组对象的浅克隆

2.数组，对象的解构赋值，快速取出对应值

var obj={
  name:"jack",
  age:18,
}
let {name}=obj;
var arr=["中","jjj","fff"];
let [a,b]=arr;