I have an object that is a list of chatrooms, where the keys are chat room names and the value is a reference to the chat room. I want to deliver the rooms to users 50 rooms at a time. But I don't see how this can be done with an object.

Suppose you want to loop through

```
var obj = {
   "a" : 1,
   "b" : 2.
   "c" : 3
}

```

But start at "b", ending up with only "b" and "c" being accessed. Can it be done, including using some kind of map or table?