陣列的結構

單行結構

 let [name,age,sex]=['Mr.Lee',100,'男'];

雙行結構

let info=['Mr.Lee',100,'男'];  //陣列賦值
let [name,age,sex]=info;   //陣列結構賦值

陣列層次需要匹配

let [name,[age,sex]]=['Mr.Lee',[100,'男']];

let [,,sex]=['Mr.Lee',100,'男'];

 let [name, ...other]=['Mr.Lee',100,'男'];

物件的結構

 1
 
 let obj={
 2     name:'Mr.Lee',
 3     age:100
 4 };
 5 let {name,age}=obj; 或  ({name,age}=obj);
 6 
 7 let obj={
 8     name:'Mr.Lee',
 9     age:100
10 },name='Mr.Wang';   //被替代
11 ({name,age}=obj); //用()不用get的原因，避免臨時性死區

let obj={...}
let {name,age,sex='女'}=obj;

let {name:myname,age:myage}=obj;  //
 
name將失效
console.log(myname);
console.log(myage);

 1 let obj={
 2     name:'Mr.Lee',
 3     age:100,
 4     info:{
 5         id:1,
 6         sex:'男'
 7     }
 8 };
 9 let {info:{id,sex}}=obj;
10 console.log(id);
11 console.log(sex);

簡寫模式

let {name,age}={name:'Mr.Lee',age:100
 
};

常用的結構

function fn(){
    return ['Mr.Lee',100,'男'];
}
let [name,age,sex] = fn();
console.log(name);

function fn2(){
    return{
        name:'Mr.Lee',
        age:100,
        sex:'男' 
    };
}
let [name,age,sex] = fn2(); //返回的是物件
console.log(name);

1 function fn([name,age,sex]){
2     console.log(name);
3 }
4 fn(['Mr.Lee',100,'男']);
5 function fn2([name,age,sex]){
6     console.log(name);
7 }

1 let[x,y,z]='ABC';
2 console.log(x);   //A
3 
4 let{length:len}='ABC';  //長度
5 console.log(len);  //輸出3