Get the real type of a value

gistfile1.js

/**
 * Thanks to Dmitry Baranovsky for his knowledge sharing:
 * http://dmitry.baranovskiy.com/post/typeof-and-friends
 */
function is (value) {
  return {
    aan: function (type) {
      type = String(type).toLowerCase();
      return Object.prototype.toString.call(value).slice(8, -1).toLowerCase() === type;
    }
  }
}