> On 24 Sep 2016, at 12:13 PM, Uli Kusterer <witness.of.teacht...@gmx.net> > wrote: > >> I expect the first thing -isEqualToString: does is a pointer comparison, so >> it’s unlikely to be significantly less performant for the case of when the >> pointers are literally identical. > > No, Graham, don't do that! > > There is no guarantee that the context is a valid object. It is just supposed > to be a unique pointer value so your class can tell a KVO notification from > notifications for other observers on the same object (e.g. if a subclass > observes the same value as a base class).
Yep, I’ve realised (from this discussion) that that’s an invalid assumption of another kind. I’ve been revising code that does this as a result. Always something to learn :) —Graham _______________________________________________ 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
