Re: When do I need to override hash?
Re: When do I need to override hash?
- Subject: Re: When do I need to override hash?
- From: Kyle Sluder <email@hidden>
- Date: Thu, 20 Aug 2009 13:37:25 -0700
On Thu, Aug 20, 2009 at 1:33 PM, Clark Cox<email@hidden> wrote:
> -isEqual: is how Cocoa collections define equality. Saying that two
> objects are "equal" means, by definition, that -[obj1 isEqual: obj2]
> returns true.
This has nothing to do with -hash.
P: Two objects are equal.
Q: They have the same hash.
P -> Q.
Note that Q does not imply P.
--Kyle Sluder
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