How can I merge Object in Javascript?

Question

This is two object. One is 'major'. Other one is 'marjorModel'.

const major = [
  {
    id: 1,
    subject: 'math',
    title: 'no good'
  },
  {
    id: 2,
    subject: 'science',
    title: 'good'
  }
]

const majorModel = [
 {
   id: 1,
   amount: 23,
   date: '2022-03-01'
 },
 {
   id: 3,
   amount: 26,
   date: '2022-03-01'
 }
]

and I want to merge new one

example)

const newObj = [
 {
  id: 1,
  subject: 'math',
  title: 'no good',
  amount: 23,
  date: '2022-03-01'
 },
 {
  id: 2,
  subject: 'science',
  title: 'good',
  amount: 26,
  date: '2022-03-01'
 }
]

I don't know how to merge different of other object. please let me know!!

So what happened with `id: 3`? – trincot Sep 01 '21 at 13:31 — trincot, Sep 01 '21 at 13:31
Ooops... that's my fault... thx a lot! – batman_jh Sep 02 '21 at 01:51 — batman_jh, Sep 02 '21 at 01:51

score 0 · Accepted Answer · answered Sep 01 '21 at 13:31

0

You can use reduce

major.reduce((acc, v, i) => {
  acc.push({
    ...v,
    ...majorModel[i]
  });
  return acc;
}, []);

answered Sep 01 '21 at 13:31

Brandon

1,447
2
21
41

How can I merge Object in Javascript?

1 Answers1