efficient searching of arrays

FROM : Mike Abdullah
DATE : Mon Aug 14 21:21:08 2006

Let's say I have an NSArray of several hundred instances of 
MyObject.  MyObject has a simple accessor method:

- (long)objectID;

I want to find the instance of MyObject whose objectID is 204.  What 
would be the best way of doing this?  At present, the only thing I 
can really think of is:

NSEnumerator *objectsEnumerator = [myArray objectEnumerator];
MyObject *anObject;

while (anObject = [objectsEnumerator nextObject])
{
   if ([anObject objectID] == 204)
       return anObject;
}

However this seems a little clunky.  Is there a better way of doing 
things in Cocoa that I haven't come across?

Mike.