JS How to add a new property to an array of objects inside

Add a new property to an array of objects which
var arry = [{a: 11 , b: 22, c: 33, d: 44}, {a: 11, b: 0, c: 0, d: 44}, { A:. 11, B: 22 is, C: 99, D: 99}];
var arry2 = [];
arry.map (((Item, index) => {
arry2.push (Object.assign ({}, Item, mess1 {: item.c, mess2: item.d}))
}))
the console.log (arry2);

 

An array of objects out data into another object
var arry = [{a: 11 , b: 22, c: 33, d: 44}, {a: 11, b: 0, c: 0, d: 44 }, {A:. 11, B: 22 is, C: 99, D: 99}];
var arry2 = [];
arry.map (((Item, index) => {
arry2.push (Object.assign ({} , {mess1: item.c, mess2: item.d}))
}))
the console.log (arry2);

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Author: Chen excellent horse
Source: CSDN
Original: https: //blog.csdn.net/qq_24147051/article/details/80541112
copyright notice : This article is a blogger original article, reproduced, please attach Bowen link!

 

Question: subString interception, "" front, or the back of the string?

String a = items1.get(j).toString();
parentId = a.substring(0,a.indexOf(",")).trim();//逗号前面
levelCode = a.substring(a.indexOf(",")+1).trim();//逗号后面
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作者：隔壁老方
来源：CSDN
原文：https://blog.csdn.net/fangkecool2008/article/details/50822576
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