I have a pretty large number of objects "usrSession" I store them in my ArrayCollection usrSessionCollection.

I'M looking for a function that returns the latest userSessions added with a unique userID. So something like this:

1. search the usrSessionCollection and only return one userSessions per userID.

2. When it has returned x number of userSessions then deleted them from the usrSessionCollection

I'M stuck - would really love some code that can help me with that.

1. function ArrayCollection() {
2. var myArray = new Array;
3. return {
4. empty: function () {
5. myArray.splice(0, myArray.length);
6. },
7. add: function (myElement) {
8. myArray.push(myElement);
9. }
10. }
11. }
12. 
    
13. function usrSession(userID, cords, color) {
14. this.UserID = userID;
15. this.Cords = cords;
16. this.Color = color;
17. }
18. 
    
19. usrSessionCollection = new ArrayCollection();
20. 
    
21. $.getJSON(dataurl, function (data) {
22. for (var x = 0; x < data.length; x++) {
23. usrSessionCollection.add(new usrSession(data[x].usrID.toString(), data[x].usrcords.toString() ,data[x].color.toString());
24. }
25. });