On iOS, NSNotFound is defined as NSIntegerMax. However, the index of an 
NSArray, which is a case where you'd often want to use NSNotFound (e.g. 
indexOfObject:), is of type NSUInteger.

Isn't there a type mismatch here? It seems to me that NSNotFound ought to be a 
value *outside* the possible range NSArray index values - which it would be, if 
NSNotFound were NSUIntegerMax, or if NSArray's indexes were of type NSInteger. 
As thing are, when you call indexOfObject: and test the result against 
NSNotFound, you could be getting the wrong answer; if that index happens to be 
NSIntegerMax (which is only halfway through the available unsigned indexes), it 
will seem to be NSNotFound when in fact it is an actual index.

I must be wrong about this, since Apple wouldn't make such a basic mistake. So 
what's *my* mistake? Thx - m.

--
matt neuburg, phd = m...@tidbits.com, http://www.apeth.net/matt/
pantes anthropoi tou eidenai oregontai phusei
Programming iOS 6! http://shop.oreilly.com/product/0636920029717.do
RubyFrontier! http://www.apeth.com/RubyFrontierDocs/default.html
TidBITS, Mac news and reviews since 1990, http://www.tidbits.com


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