将对象转为键值对数组
Object.entries 返回键/值对数组:[ ["name","John"], ["age", 30] ]。这就是 Map 所需要的格式
let obj = {
name: "John",
age: 30
};
let map = new Map(Object.entries(obj));
alert( map.get('name') ); // John
注:以上内容仅用于日常学习
Object.entries 返回键/值对数组:[ ["name","John"], ["age", 30] ]。这就是 Map 所需要的格式
let obj = {
name: "John",
age: 30
};
let map = new Map(Object.entries(obj));
alert( map.get('name') ); // John