Le 1 févr. 2010 à 19:17, Michael Gardner a écrit : > On Jan 29, 2010, at 6:44 PM, Chunk 1978 wrote: > >> i'm almost 100% sure it's not possible to return a nil on basic data >> types, but just incase i'll post the question. >> >> ------------------------------------------------------ >> - (float)panForSoundWithName:(NSString *)soundName >> { >> OpenALSound *sound = [soundDictionary objectForKey:soundName]; >> if (!sound) return 0.0f; >> return sound.pan; >> } >> ------------------------------------------------------ >> >> so above i'd like to write "if (!sound) return nil;". my reasoning is >> because some attributes to a sound object (like pan) are created only >> when the sound is initialized. if there is no sound object than there >> should also be no pan value to return. unfortunately, the float >> default 0.0f is also the default value for pan (range from -1.0 to >> 1.0). > > Another option besides those already mentioned is to use exceptions. Whether > they're appropriate depends on whether calling -panForSoundWithName: on > non-existent sounds is part of your normal control flow, I guess. >
This solution is not suitable in Cocoa. Exceptions are slow and should be used only when a critical error occurs. They should not be part of the normal flow and should not be used in this kind of situation. -- Jean-Daniel _______________________________________________ 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