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Re: Using NSSortDescriptor to reverse sort an NSArray containing NSString objects



On Jun 6, 2008, at 3:43 AM, George Stuart wrote:

NSSortDescriptor *desc = [[NSSortDescriptor alloc] initWithKey:nil ascending:NO selector:@selector(localizedCompare:)];
NSArray *sortedArray = [unsortedArray sortedArrayUsingDescriptors: [NSArray arrayWithObject:desc]];
[desc release];


That seems to work just fine... but I'm worried. I "guessed" at using the key of "nil" since I want the actual objects in the array to be the target for the @selector. Is it a fluke that this works? I don't want to rely on undefined behavior.

Hmm. Good question. You could use @"description" as the key to eliminate the uncertainty. Or maybe @"self".


Cheers,
Ken

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 >Using NSSortDescriptor to reverse sort an NSArray containing NSString objects (From: George Stuart <email@hidden>)



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