1,数组的合并
var a=["校长","老师"];
var b="我";
var c=[...a,b];
c=["校长","老师","我"];
2,对象,()里面实现对象的组装
var a=((
b={},
b.name="小花",
b
));
console.log(a) //{name:'小花'}
3,对象的映射
var a={"name":"xiaoming","age":12,"sex":"man"};
var {name,sex}=a;
console.log(name); //"xiaoming"
console.log(sex); //"man"