On May 11, 2010, at 7:48 PM, Ken Thomases wrote: > On May 11, 2010, at 10:17 AM, Keary Suska wrote: > >> There have been some lengthy discussions about this. An object may choose to >> emit KVO notifications for its collection properties (but this behavior >> should never be expected unless it is specifically documented), but no >> collection will ever emit a KVO notification that its contents have changed >> (unless, of course, you subclass and add this behavior). > > Depends on whether you consider a dictionary a collection or not. > NSMutableDictionary does emit KVO notifications when its contents change. > > I suspect you were thinking of sets and arrays, in which case you're correct.
Yes, this is an important distinction. I often forget about dictionaries since, in my mind, they behave much more like regular objects and themselves tend to represent properties rather than relationships. But they are a collection, and they will emit KVO notifications for contents. Keary Suska Esoteritech, Inc. "Demystifying technology for your home or business" _______________________________________________ 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
