title: compact tags: array,beginner

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", Number("e") * 23, NaN, "s", 34]); // [ 1, 2, 3, 'a', 's', 34 ]