Use Array#isArray instead of instanceof

[rauchg]

And if you plan to support browser, use this instead

/**
 * Checks for Array type.
 *
 * @param {Object} object
 * @api private
 */

function isArray (obj) {
  return '[object Array]' == Object.prototype.toString.call(obj);
};

[rauchg]

This also applies to dref.js

[crcn]

I think generally it'd be good practice for me to start using Array.isArray versus value instanceof Array for this very reason. Made note of it. Thanks for pointing it out.