Object.keys()和Object.values()小记

Object.keys()把对象属性转为数组

// 获取对象的属性
let person={
                name:'一只流浪的kk',
                age:20,
                eat:function(){}
            }
            console.log(Object.keys(person));//    ['name','age','eat']


//获取数组的索引

let arr=[1,2,3,4,5];
console.log(Object.keys(arr));//['0','1','2','3','4','5']


//处理字符串，返回索引值数组

let str='hello';
console.log(Object.keys(str));//['0','1','2','3','4']

let person={
                   name:'一只流浪的kk',
                   age:18,
                   eat:function(){
                       
                   }
           }
           Object.keys(person).map((key)=>{
                   person[key];//获得属性对应的值，可以进行其它处理
           })

// Object.values把对像的值转为数组

var obj = {
        10: 'a',
        1: 'b',
        2: 'c'
    };
    console.log(Object.values(obj));
    // ['b', 'c', 'a']

    var obj1 = {
        0: 'a',
        1: 'b',
        2: 'c'
    };
    console.log(Object.values(obj1));
    // ['a', 'b', 'c']

 

 

 

转：https://www.cnblogs.com/jjgw/p/11647012.html