7-3 WPS JS宏 keys、values、entries、JSON.stringify 循环对象中的属性

7-3 WPS JS宏 keys、values、entries、JSON.stringify 循环对象中的属性

注意：映射中的方法，映射.keys()、映射.values()、映射.entries()与对象使用写法的不同。

1.keys:

指定对象的键

Object.keys(对象)

2.values:

指定对象的值

Object.values(对象)

3.entries:

指定对象的键和值

Object.entries(对象)

4.JSON.stringify:

内容转为文本型

JSON.stringify(Object.entries(对象))

一、基础测试

function test(){

var obj={姓名:"小明",性别:"男",年龄:18};

var n=1;

var k=Object.keys(obj);

//局部变量结果：k="姓名","性别","年龄";Array/object

var v=Object.values(obj);

//局部变量结果：v="小明","男",18；Array/object

var x=Object.entries(obj)

//局部变量结果：x=Array(2),Array(2),Array(2);Array/object

var a=JSON.stringify(Object.entries(obj));

//局部变量结果：a="\["姓名","小明","性别","男","年龄",18]"；string

var a1=Object.entries(obj).map(ar=>n++,ar\[0,ar1]);

//局部变量结果：a1=Array(3),Array(3),Array(3);Array/object

var s=JSON.stringify(a1);

//局部变量结果：s="\[1,"姓名","小明",2,"性别","男",3,"年龄",18]";string

}

function test(){	
var obj={姓名:"小明",性别:"男",年龄:18};
var	n=1;

var k=Object.keys(obj);
//局部变量结果：k=["姓名","性别","年龄"];Array/object

var v=Object.values(obj);
//局部变量结果：v=["小明","男",18]；Array/object

var x=Object.entries(obj)
//局部变量结果：x=[Array(2),Array(2),Array(2)];Array/object

var a=JSON.stringify(Object.entries(obj));
//局部变量结果：a="[["姓名","小明"],["性别","男"],["年龄",18]]"；string

var a1=Object.entries(obj).map(ar=>[n++,ar[0],ar[1]]);
//局部变量结果：a1=[Array(3),Array(3),Array(3)];Array/object

var s=JSON.stringify(a1);
//局部变量结果：s="[[1,"姓名","小明"],[2,"性别","男"],[3,"年龄",18]]";string
				}