What is the best way add all array item in Javascript

Question

const arr1 = [
[{ id: 1 }],
[{ id: 2 },{ id: 3 }], 
[{ id: 4 }]
];

I want to add all items in this array how can I do this. I want my output as Like:

const arr2 = [
     {id:1},
     {id:2},
     {id:3},
     {id:4}
   ]

See https://stackoverflow.com/questions/10865025/merge-flatten-an-array-of-arrays — Davedude, Apr 20 '21 at 17:13
@Jubayer simply using `arr1.flat()` will work for your example. If you have an array of even greater depth of nested arrays of objects, you can even use `arr1.flat(Infinity)` to flatten to a variable depth. — Brandon McConnell, Apr 20 '21 at 17:28
@Jubayer please take a look at my solution below when you have a chance — Brandon McConnell, Apr 20 '21 at 18:31

score 0 · Answer 1 · answered Apr 20 '21 at 18:29

Using arr1.flat() will work for your example. If you have an array of even greater depth of nested arrays of objects, you can even use arr1.flat(Infinity) to flatten to a variable depth:

const arr1 = [
  { id: 0 },
  [{ id: 1 }],
  [{ id: 2 },{ id: 3 }], 
  [{ id: 4 }]
];

console.log(arr1.flat());

What is the best way add all array item in Javascript

1 Answers1