Extend the properties of one object into another.

extend

// functionality similar (if not the same) as _'s extend method

var extend = function(){
  if (arguments.length < 2) return;
  var extended = arguments[0];
  for (var _x = 1, _xx = arguments.length; _x < _xx; _x++) {
    var base = arguments[_x];
    for (var key in base) {
      extended[key] = base[key];
    }
  }
  return extended;
};