"Implementing" Hashes in Javascript

Hash.js

//Hash.js -- a cute little wrapper that is really great for turning data-only objects into something that
//javascript explictly calls a "Hash".  Useful for cosmetically improving data structure representations
//in your favorite console. also great for making Javascript look like some of the more friendly scripting
//languages like Ruby.  Possibly useless for anything else, and may make your code easier to read at the
//expense of speed and/or memory.

Hash = function(object)
{
  if (object && (typeof object == 'object'))  //do an initial type check to see if this can be hashified.
  {                                           //if not, then you should return an empty hash {}.
    if (object instanceof Array)              //special case, we have passed an array.
    {
      var a = new Array();                    //create a new array that is going to go into our hash.
      for (var i = 0; i < object.length; i++) //iterate over the passed array.
        if (typeof object[i] != 'object' || object[i] == null)
          a.push(object[i]);                  //if it's a boring member, just push it onto the array
        else
          a.push(new Hash(object[i]));        //if it's an object member, call hash again.
      return a;                               //yes! you can effectively bypass the "new" by returning a value
    }                                         //this overrides the Hash object creation and keeps Arrays as is.
    else
    for (var o in object)                     //iterate over the objects in our source
    {
      if ((typeof object[o] != 'object') || object[o] == null)
        this[o] = object[o]                   //if it's boring, just add it to the hash.
      else
        this[o] = new Hash(object[o]);        //iterate hash-ification!
    }
  }
}