On 27 May 2010, at 13:59, Ariel Feinerman wrote: > Hi, > > if i understand, -copy message implement via -retain for true immutable > objects like NSNumber, via -alloc, -init thus make true copy for mutable > objects like NSMutableArray, my question is: what does -copy for immutable > variant of immutable/mutable objects, for instance NSArray *arrayCopy = > [array copy]; returns true copy or retains one? Or what does happen if > object itself is immutable and has not setters, but it instance variables is > mutable and can be changed? > NSDictionary instance has NSMutableDictionary values
Container classes make shallow copies of themselves. If you've got a dictionary containing mutable dictionary values, you either: A) NSDictionary *copy = [[NSDictionary alloc] initWithDictionary:myDict copyItems:YES]; B) Look again at your code and think that it would probably be better to create model classes rather than nested dictionaries. > > > -- > best regards > Ariel > _______________________________________________ > > 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/cocoadev%40mikeabdullah.net > > This email sent to cocoa...@mikeabdullah.net _______________________________________________ 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
