On Jan 6, 2011, at 12:43 PM, Quincey Morris wrote: > The semantics of keys also requires them to be immutable (well, maybe that's > the semantics of 'isEqual:')
The immutability requirement stems from needing to guarantee that keys in a dictionary are unique. If a key was mutable, it could be changed after a key-value pair was added to a dictionary, and if the new value of the key was "equal" to the value of another key, you'd have a borked dictionary. _murat_______________________________________________ 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 arch...@mail-archive.com
