Re: Implementing NSFastEnumeration

On Fri,  2 Oct 2009 00:21:24 +0200, Tom Hageman wrote:
> How about _replacing_ the key in itemsPtr[i] with the value as you go
> along? Something like this: (Achtung, Mailware!)
>
> - (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state
> {
> 	NSUInteger i, count = [keys countByEnumeratingWithState:state
> objects:stackbuf count:len];
> 	for (i = 0; i < count; i++)
> 	{
> 		id key = state->itemsPtr[i];
> 		id value = [values objectForKey:key];
> 		state->itemsPtr[i] = value;
> 		//stackbuf[i] = value;
> 	}
> 	//state->itemsPtr = stackbuf;
> 	return count;
> }

Urrgh, what was I thinking?  This is a bad idea, as it may overwrite some  
objects private backingstore.  So don't do this!

--Tom.