在Javascript中使用map函数返回新值

Question

这是我的json:

[ { gsm: 'gsm',
  firstName: 'firstname',
  lastName: 'lastname' },
{ gsm: '123456789',
  firstName: 'Mohamed',
  lastName: 'Sameer'},
{ gsm: '987654321',
  firstName: 'Hameed',
  lastName: 'Basha'}]

我希望我的最终输出看起来像:

[ { gsm: 'gsm',
  firstName: 'firstname',
  lastName: 'lastname',
  userKey: 'Key1'},
{ gsm: '123456789',
  firstName: 'Mohamed',
  lastName: 'Sameer',
  userKey: 'Key1'},
{ gsm: '987654321',
  firstName: 'Hameed',
  lastName: 'Basha',
  userKey: 'Key1'}]

我需要使用任何javascript方法,如map等

Answer 1

使用 map

var output = arr.map( s => ( s.userKey = "Key1", s ) );

演示

var arr = [{
    gsm: 'gsm',
    firstName: 'firstname',
    lastName: 'lastname'
  },
  {
    gsm: '123456789',
    firstName: 'Mohamed',
    lastName: 'Sameer'
  },
  {
    gsm: '987654321',
    firstName: 'Hameed',
    lastName: 'Basha'
  }
];

var output = arr.map( s => ( s.userKey = "Key1", s ) );

console.log( output );