Convert Array to Object with key name

Question

What is the best way to convert:

[2019,2020,2021]

to

{
  0: {year:2019},
  1: {year:2020},
  2: {year:2021}
}

@Barmar The proposed answer doesn't quiet answers it, as the end result needs to be an object, not just values of the array. — vanowm, Aug 10 '21 at 19:27
Why do you want an object with numeric keys instead of an array? — Barmar, Aug 10 '21 at 19:29

score 1 · Answer 1 · answered Aug 10 '21 at 19:21

1

Please try this:

a = [2019,2020,2021];
a.reduce((acc, val, idx)=> {acc[idx] = {year: val}; return acc;}, {});

answered Aug 10 '21 at 19:21

Rinkal Rohara

232
1
7

we are creating 1 object out of an array. So we are reducing the array. May would create another array. Though the question does raise the question of whether or not it should be an array instead of an object. – async await Aug 10 '21 at 19:22

score 0 · Answer 2 · answered Aug 10 '21 at 19:36

Combination of Object.assign() and array.map() comes to mind:

const array = [2019,2020,2021];

const object = Object.assign({}, array.map(a => ({year: a})));
console.log("object:", object);


const object2 = {}
array.forEach((a, i) => object2[i] = {year: a});
console.log("object2:", object2);

Convert Array to Object with key name

2 Answers2