The array adds new properties to the old array of properties mentioned in the new array to go

1. Add a new property to the array:

1.1: Build an array first:

var oldarr=[{name: ' li '},{name: ' Hi '},{name: ' Us '}

1.2: Add a new property to this array in the method:

function Looppushobj (Oldarr) {let arr=[]; if (oldarr&&oldarr.length>0) {    for (var in oldarr) {          var tempobj = {};         = Oldarr[i];        tempobj[' sex ' = ' male ';        Arr.push (tempobj);    }} return     arr;}

1.3: Build good one new array, push in:

var newArr = looppushobj (Oldarr)

2. The properties of the old array refer to the new array:

2.2 The method of the second step is different, the principle is the same:

function Looppushobj (Oldarr) {let arr=[]; if (oldarr&&oldarr.length>0) {    for (var in oldarr) {          var tempobj = {};         = I.name;        Arr.push (tempobj);    }} return     arr;}

The array adds new properties to the old array of properties mentioned in the new array to go