30-seconds-of-code/snippets/pick.md

title, tags, expertise, firstSeen, lastUpdated

title	tags	expertise	firstSeen	lastUpdated
Pick object keys	object	intermediate	2017-12-13T23:51:34+02:00	2020-10-18T14:58:09+03:00

Picks the key-value pairs corresponding to the given keys from an object.

• Use Array.prototype.reduce() to convert the filtered/picked keys back to an object with the corresponding key-value pairs if the key exists in the object.

const pick = (obj, arr) =>
  arr.reduce((acc, curr) => (curr in obj && (acc[curr] = obj[curr]), acc), {});

pick({ a: 1, b: '2', c: 3 }, ['a', 'c']); // { 'a': 1, 'c': 3 }