can use mongodb method? (request for Cursor.count())

Hi s9tpepper,
Could i use mongodb method like count() ,sort() etc.
For now i use find() to get a cusor but maye the result is large but i just need the count of the result set.
In java lib,we can use db.collections.find({'fidel' : 'abc'}).count(); that is quite faster than use cosor.toArray().length;
Any similar solution in mongoAS3?
Thanks
Bat
