Remove falsy values from an array

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);

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

Source