Can someone help how to convert this array

Question

What is the best way to convert from this array

[{key: "key1", value: "1"},{key: "key2", value: "2"}]

to

{"key1":"1","key2":"2"}

Map won't work because it returns an array of objects, 1 for each input. — frodo2975, Nov 20 '20 at 03:20

score 3 · Accepted Answer · answered Nov 20 '20 at 02:50

3

Using Array.prototype.reduce, you can convert it easily as follows.

const input = [{key: "key1", value: "1"},{key: "key2", value: "2"}];
const output = input.reduce((acc, cur) => {
  acc[cur.key] = cur.value;
  return acc;
}, {});
console.log(output);

answered Nov 20 '20 at 02:50

Derek Wang

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I think a map would be more appropriate and more efficient. – Tarik Nov 20 '20 at 02:53
map would return an array, reduce would be more efficent. – tsamridh86 Nov 20 '20 at 03:19

score 1 · Answer 2 · answered Nov 20 '20 at 03:23

You can do this with a simple for loop by iterating your array and storing your keys/values in an object:

const input = [{key: "key1", value: "1"},{key: "key2", value: "2"}];
const out = {};
for (const item of input) {
  out[item.key] = item.value;
}
console.log(out);

Can someone help how to convert this array

2 Answers2