Hey Tito, It depends. Does your method require all objects in the array to conform to a protocol? If yes, and one doesn't, then throw an exception, since it is a programming error. If no, meaning you allow some to pass through with nothing happening, then you should define the behavior in a header comment and/or documentation. If it is instead some array input that the user provided, and it is a user error to provide the wrong input, then you should return a user-presentable NSError and the caller should present the error on failure.
--corbin On Oct 15, 2010, at 12:42 PM, Tito Ciuro wrote: > Hello, > > I'm implementing a method and I'm not sure what the behavior should be when > detecting an anomaly. > > Case in point: I have a method that iterates through an array of objects. As > I traverse the array, I'm, checking whether the object in the array conforms > to a custom protocol. If it does, everything is fine and I process it. > However, if at some point I detect that the array contains a non-conforming > object, what should the method do?: > > a) skip the non-conforming object and continue processing and return a BOOL > or fill an NSError? > b) stop processing and return a BOOL or fill an NSError? > c) throw an exception? > > Since the method would end up processing less objects that the developer > intended, I wonder what Cocoa developers would expect in this case... > > Thanks, > > -- Tito _______________________________________________ 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
