Can I set the type of a Javascript object?

Question

I\'m trying to use some of the more advanced OO features of Javascript, following Doug Crawford\'s \"super constructor\" pattern. However, I don\'t know how to set and get types

Answer 1

if you're using a constructor, a better solution than instanceOf, would be this :

Object.toType = function(obj) {
  return ({}).toString.call(obj).match(/\s([a-z|A-Z]+)/)[1].toLowerCase();
}


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"
toType(new CreateBicycle(2)); //"createbicycle"

The explanation of WHY it's the best way to do it relies in This post.