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

title, type, language, tags, cover, dateModified

title	type	language	tags	cover	dateModified
Compact array	snippet	javascript	array	basket-paper	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 ]