falsybouncer.js

// Remove all "flasy" values from an Array.
// Falsy values in JavaScript are false, null, 0, "", undefined, and NaN.

function bouncer(arr) {
  
  var test = function(x){
    return Boolean(x);
  };
  
  for(var i = 0; i < arr.length; i++){
    var temp = Boolean(arr[i]);
    arr = arr.filter(test);
  }
  
  return arr;
}