Re: Storing values in dictionary with their address as the key
Re: Storing values in dictionary with their address as the key
- Subject: Re: Storing values in dictionary with their address as the key
- From: Jonathan Hess <email@hidden>
- Date: Mon, 28 Jul 2008 12:29:37 -0700
On Jul 28, 2008, at 11:44 AM, I. Savant wrote:
If I wanted to store an object in a dictionary and set its key as
the
object's memory address - how would I go about doing this?
I'm racking my brains trying to think of a good reason to do this
and am
drawing a blank. I can, however, think of myriad bad reasons.
A good reason would be that you care about identity equality and not
value equality. You care that the key is the exact same instance, not
that it is an equivalent instance. (== vs isEqual:) Another reason
would be that the keys might not implement NSCopying, which
NSDictionary requires.
Jon Hess
Agreed - I can't help but wonder about class clusters but I can't
think of a direct reason why this would be a 'problem area'. It's just
the first thing that popped into my head. :-)
--
I.S.
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