[Biococoa-dev] Re: BCSymbolSet

Alexander Griekspoor mek at mekentosj.com
Sun Sep 12 16:00:52 EDT 2004

Ha Koen,

I like the idea of having such a set, especially to have the class 
methods to get the predefined set. But you did save me a lot of work as 
indeed I can simply make BCSymbolSet a subclass of BCMutableSet (not 
NSCountedSet because you want only a single instance of a symbol in the 
set at max). But most methods are there already in the BCMutableSet, so 
that will be simple. I had it based on an array, but the documentation 
says "use sets as an alternative to arrays when the order of elements 
isn’t important and performance in testing whether an object is 
contained in the set is a consideration. While arrays are ordered, 
testing them for membership is slower than testing sets.", so in 
general a great idea Koen!

Op 12-sep-04 om 21:39 heeft Koen van der Drift het volgende geschreven:

> Hoi Alex,
> Do we really need a BCSymbolSet? NSMutableSet already allows adding of 
> objects:
> - (void)addObject:(id)anObject
> I use this for an NSCountedSet, and it works very well.
> cheers,
> - Koen.
                     ** Alexander Griekspoor **
               The Netherlands Cancer Institute
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