On Jan 13, 2011, at 1:27 AM, Erik Buck wrote: > Class or instance method makes no difference in this case with regard to > polymorphism.
It does. He's only passing the two instance variables to the class method. And, being a class method, "self" is the class, not the half-initialized instance. So what using a class method does, is it makes it possible for subclasses to change the computation by overriding the method (assuming he's using [[self class] compute:...] to call the class method, and doesn't hardcode the class name). However, since it's a class method, subclasses can't accidentally mess with the half-initialized object. Cheers, -- Uli Kusterer "The Witnesses of TeachText are everywhere..." _______________________________________________ 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
