An improved version of the typeOf operator.

toType.js

var toType = function(obj) {
  return ({}).toString.call(obj).match(/\s([a-zA-Z]+)/)[1].toLowerCase()
}
 
/**
 * http://javascriptweblog.wordpress.com/2011/08/08/fixing-the-javascript-typeof-operator/
 * toType({a: 4}); //"object"
 * toType([1, 2, 3]); //"array"
 * (function() {console.log(toType(arguments))})(); //arguments
 * toType(new ReferenceError); //"error"
 * toType(new Date); //"date"
 * toType(/a-z/); //"regexp"
 * toType(Math); //"math"
 * toType(JSON); //"json"
 * toType(new Number(4)); //"number"
 * toType(new String("abc")); //"string"
 * toType(new Boolean(true)); //"boolean"
 **/