JS - Given array of objects, can I return an array of just selected properties? [duplicate]

Question

Given an array like this:

[{a: 1, b: 2}, {a: 3, b: 4}, {a: 5, b: 6}]

Is there any (easy) way to return the an array of the same objects, but just with a selected property? E.g. let's say I only wanted to retain property "a" ...

[{a: 1}, {a: 3} {a: 5}]

let result = arr.map(({a}) => ({a}))

ibrahim mahrir
– ibrahim mahrir

2018-11-30 23:10:12 +00:00
Commented Nov 30, 2018 at 23:10 — ibrahim mahrir
– ibrahim mahrir, Commented Nov 30, 2018 at 23:10

kind user · Accepted Answer · 2018-11-30 23:16:24Z

2

Possible solution (little bit more generic than Ibrahim's comment):

const a = [{a: 1, b: 2}, {a: 3, b: 4}, {a: 5, b: 6}];

const f = (arr, prop) => a.map(({ [prop]: propToKeep }) => ({ [prop]: propToKeep }));

console.log(f(a, 'a'));

answered Nov 30, 2018 at 23:16

kind user

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