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

function removeFalsy(value){

  var val = Boolean(value);
  if(!val)
    return false;
  return true;
}

function bouncer(arr) {

  return arr.filter(removeFalsy);
}

bouncer([7, "ate", "", false, 9]);