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// 新增赋值方式：解构赋值
// 解构：解开，结构
// 数组的解构：按照顺序一一对应，没有对应，为undefined
var arr = ["hello",3.1415,true];
var [c,b,a,d,e,f] = arr;
console.log(a);//true
console.log(b);//undefined
console.log(c);//hello
console.log(d);//u
console.log(e);//u
console.log(f);//u
// 字符的解构：按照顺序一一对应，没有对应，为undefined
var str = "hi";
var [a,b,c,d] = str;
console.log(a)//h
console.log(b)//i
console.log(c)//u
console.log(d)//u
// 对象的解构：按照key一一对应，没有对应，为undefined
var obj = {
name:"admin",
age:18,
sex:1
}
var {sex,age,name,like} = obj;
console.log(name)//admin
console.log(age)//18
console.log(sex)//1
console.log(like)//undefined
// 参数的解构
function fn({name,age}){
// name
// age
}
fn({name:"admin",age:19})
function fn(){
return ["hello","world"]
}
var [a,b] = fn();
var a = 10;
var b = 20;
var [b,a] = [a,b];
console.log(a,b)//20 10
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