On Sat, Aug 23, 2008 at 11:41 PM, Graham Cox <[EMAIL PROTECTED]> wrote: > I have a class for which equality can be defined as having the same internal > string value (which happens to be a UUID-turned-string). I can easily > implement isEqual: based on that but the docs say I also need to implement > -hash. Any pointers on what is a good way to do that? Could I just safely > defer to the -hash returned by the string in question? >
If you're deferring both -isEqual: and -hash to an NSString, you'll be fine. Hash doesn't need to be anything complicated (although a good distribution is nice), just as long as two objects that return YES for -isEqual: return the same value for -hash (the inverse doesn't have to be true). Phil _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
