es6 map学习记录

var obj={
'name':'leo'
};
let map=new Map();
map.set(obj,"very,goods");
let v=map.get(obj);
console.log(v);
map.set(12,'number==12');
console.log(map.size);
console.log(map.has(12))；

if(map.has(12)){}

map.delete(12)

let a="bbb";
map.set(a,"你好");
console.log(map.get(a),map.get("bbb"));
let mp=new Map([
['name','leo'],
['qq','549233434'],
]
)
let keys=map.keys();
console.log(keys);
for(let k of keys){
console.log(k);
}
let value=mp.values();
console.log(value);
for(let k of value){
console.log(k)
}
let ent=mp.entries();
for(let k of ent){
console.log(k);
}
for(let k of mp){
console.log(k);
console.log(k[0])
}

map的结构与object有点类似，map可以用变量作为key值