How do I convert an array of objects to an object of objects?

Question

For example, I have the following array of objects:

[{id:1, name: Hana, age: 30}, {id:2, name: Sana, age: 20}, {id:3, name: Kana, age: 30}]

I want to convert it to an object of objects as following:

{0:{id:1, name: Hana, age: 30}, 1:{id:2, name: Sana, age: 20}, 2:{id:3, name: Kana, age: 30}}

Out of interest why do you want to do this? The array is already zero-indexed. This doesn't really seem to solve a problem. — Andy, Jan 25 '23 at 07:17

score 2 · Answer 1 · answered Jan 25 '23 at 07:16

2

Using Object's pre built method assign you can achieve this.

Object.assign({}, yourObject);

No need to iterate through the Array unnecessary.

answered Jan 25 '23 at 07:16

Swanand Taware

723
2
7
32

FYI, this also iterates through the indices of the array internally. – adiga Jan 25 '23 at 07:22
Agree, but it will reduce the time complexity and with this we do not need to write custom logic for it. – Swanand Taware Jan 25 '23 at 07:24
where do I pass the array of objects here? – emma Jan 25 '23 at 07:47
after the `,` i have mentioned it in answer as well by adding yourObject. You can assign that result to the any variable. – Swanand Taware Jan 25 '23 at 08:21

score 1 · Answer 2 · answered Jan 25 '23 at 07:17

1

You can easily achieve the result, using a simple map function and store the result in an object as a key:value pair

const data = [{id:1, name: 'Hana', age: 30}, {id:2, name: 'Sana', age: 20}, {id:3, name: 'Kana', age: 30}]

const resultObj = {}

data.map((obj,index) =>  resultObj[index] = obj)

console.log(resultObj)

answered Jan 25 '23 at 07:17

karthik

528
4
19

Arrow functions should not return assignment, could you improve your answer? – emma Jan 25 '23 at 07:39

score 0 · Answer 3 · answered Jan 25 '23 at 07:21

0

You can map that array and get its unique value (in this case i have taken id as key) then map it according you want to display array.

Here is an example to do that.

var arr = [{
  id: 1,
  name: 'Hana',
  age: 30
}, {
  id: 2,
  name: 'Sana',
  age: 20
}, {
  id: 3,
  name: 'Kana',
  age: 30
}]


var mapped = arr.map(item => ({
  [item.id]: item
}));
var newObj = Object.assign({}, ...mapped);
console.log(newObj);

answered Jan 25 '23 at 07:21

Parth Raval

4,097
3
23
36

he/she is new so its hard for him to understand map/filter etc – Kishan Jan 25 '23 at 07:56

How do I convert an array of objects to an object of objects?

3 Answers3