Javascript Array takeWhile(predicate)

Array.prototype.takeWhile = function (predicate) {
  predicate = predicate || Predicate;/*from   w w  w .  j a v  a2  s .c o  m*/
  var l = this.length;
  var arr = [];
  for (var i = 0; i < l && predicate(this[i], i) === true ; i++)
    arr.push(this[i]);

  return arr;
};