ES6学习笔记之新增数据类型实例解析

let [name,age,sex]=['小明',24,'男'];
console.log(name);
console.log(age);
console.log(sex);

let [arr1,,[arr3,,[,arr6]]]=[1,2,[31,32,[331,332]]];
console.log(arr1);
console.log(arr3);
console.log(arr6);

let obj={name:'小明',age:24,sex:'男',friend:['小张','小李']};
console.log(obj.name);
console.log(obj.age);
console.log(obj.sex);
console.log(obj.friend);

let [a,b,c]="这是一个字符串";
console.log(a);
console.log(b);
console.log(c);

let myset=new Set(['data1','data2','data3','data3']);

console.log(myset.size);

myset.add('data4');//增加元素
myset.delete('data2');//删除元素
console.log(myset.has('data1'));//判断是否含有某个元素，包含返回true
myset.clear();//清除集合所有元素
console.log(myset.keys());//返回集合所有的键值
console.log(myset.values());//返回集合所有值

let obj1={key:1},obj2={key:2},obj={};
obj.value='objValue';
obj[obj1]='obj1Value';  //将对象obj1作为obj的键值
obj[obj2]='obj2Value';
console.log(obj);

let mymap=new Map([
    ['stringKey','stringValue'],
    ['age',24],
    [obj1,'obj1Value'],
    [obj2,'obj2Value'],
    [['arr'],'arrValue']
]);

console.log(mymap.size);

mymap.set('key','value');//设置map的键、值
mymap.get('key');//通过键来取值
mymap.delete('key');//删除对应的键值
mymap.has('key');//判断是否含有
//mymap.clear();//清除map中所有键值
//遍历
mymap.forEach(function (value,key) {
  console.log(key+":"+value);
})

mymap.set({},"obj1");
mymap.set({},"obj2");

let obj={};
obj[Symbol('name')]="小赵";
obj[Symbol('name')]="小钱";
console.log(obj);