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

title, tags, expertise, cover, firstSeen, lastUpdated

title	tags	expertise	cover	firstSeen	lastUpdated
Compact array	array	beginner	blog_images/basket-paper.jpg	2017-12-14T08:19:15+02:00	2020-10-22T20:23:47+03:00

Removes falsy values from an array.

• Use Array.prototype.filter() to filter out falsy values (false, null, 0, "", undefined, and NaN).

const compact = arr => arr.filter(Boolean);

compact([0, 1, false, 2, '', 3, 'a', 'e' * 23, NaN, 's', 34]);
// [ 1, 2, 3, 'a', 's', 34 ]