技術標籤：jses6

向一個物件數組裡面新增新的屬性

通過MAP 增加

var arry= [{a:11,b:22,c:33,d:44},{a:11,b:0,c:0,d:44},{a:11,b:22,c:99,d:99}];
var arry2=[];
arry.map(((item, index)=> {
arry2.push(Object.assign({},item,{mess1:item.c,mess2:item.d}))
}))
console.log(arry2);

返回

[{a:11,b:22,c:33,d:44,mess1:33,mess2,44},{a:11,b:
 
0,c:0,d:44,mess1:0,mess2:44},{a:11,b:22,c:99,d:99,mess1:99,mess2:99}];

直接增加

var a =[{name: 'Tom',age:20},{name: 'Tom2',age:22}]
a[0]['gender']='women'
a[0]['address']="China"
a[1].province="Jiangsu"