I'd start by taking a look at the CHDataStructures framework:  
http://cocoaheads.byu.edu/wiki/chdatastructures

It's a framework hosted by our local CocoaHeads group that includes most of the data structures that Apple forgot. =)

Cheers,

Dave

On Oct 15, 2009, at 5:44 PM, Ben Haller wrote:

Perhaps another way to ask the question is: suppose you wanted to implement a new collection class, akin to NSMutableArray but somehow different. How would you safely do it under GC, without using any of the pre-made Cocoa collections internally? That's all my AKPopulation really is: a poor man's (but a speedy man's!) re- implementation of something like NSMutableArray. Ought to be possible, right? So how do I manage this write barrier business to make it work properly?
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