Remove all falsy values from an array

Question

I would like to remove all falsy values from an array. Falsy values in JavaScript are false, null, 0, \"\", undefined, and NaN.

Answer 1

Using filter we can write

function bouncer(arr) {
 return arr.filter(item => item);
}
bouncer([false, null, 0, NaN, undefined, ""]) // will return [].