Gets the key "key" of the object and gets the key "key" and the value of the array separately

First, say the object, how to get Key "key";

　　

var obj={          Name: "Websong",          qq:289483936    }

　　

To get the key "name" and "QQ" for this obj object, you need to use the keys method of the built-in object, the code is as follows:

Object.keys (obj). ForEach (function (key,i,v) {            console.log (key)            Console.log ("---------")            Console.log ( i);            Console.log ("---------")            Console.log (v)        })   

　　

This method can output the key of the object obj as an array, and then we get it in a circular way.

Second, get the key and value of the array object

var arr=[{a:3},{b:4},{qqque:535880373}];

　　

The truth is the same, the only thing is to loop the array first, the code is as follows:

Arr.foreach ((v,i) =>{                               Object.keys (v). ForEach (v=>{                console.log (v)//takes the key                Console.log (arr[i][v ])//(Value of            })        })

　　

OK, here's the end of the content. If I can help you, I am very happy.

Gets the key "key" of the object and gets the key "key" and the value of the array separately