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

compact

Removes falsey values from a list.

Use filter() to filter out falsey values (False, None, 0, and "").

def compact(arr):
    return list(filter(lambda x: bool(x), arr))

compact([0, 1, False, 2, '', 3, 'a', 's', 34]); // [ 1, 2, 3, 'a', 's', 34 ]