In JavaScript: access deep object properties avoiding NPE checks

deepGet.js

/**
 * Provide a cleaner way to access deep object properties avoiding null pointers
 *
 * So, instead of doing this:
 *
 *    var x = (obj && obj.prop && obj.prop[subprop] && obj.prop[subprop][lastprop]) || "default";
 *
 * you can do:
 *
 *    var x = get(obj, "prop", "subprop", subprop, lastprop) || "default";
 *
 */
var deepGet  = function (obj) {

  if (obj === undefined || obj === null || arguments.length === 1)
    return obj;

  // convert arguments to a real Array
  var args = [].slice.apply(arguments);

  var newObj = obj[args[1]];
  var newArgs = args.slice(2);
  newArgs.unshift(newObj);
  return get.apply( this, newArgs );
};