What exactly is a so called "Class Cluster" in Objective-C?

Posted by openfrog on Stack Overflow See other posts from Stack Overflow or by openfrog
Published on 2009-12-04T00:48:30Z Indexed on 2010/03/17 1:41 UTC
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objective-c

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cocoa

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cocoa-design-patterns

I was reading that NSArray is just such a thing. Sounds heavy. I have 7 really fat books here on my desk about Objective-C, Cocoa and C. None of them mention Class Cluster at all, at least I can't find it in the Index at the back of the books. So what's that?

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