I need to keep a small (few thousand) record database of sorts. Each record has some pre-detertermined fields, but the user can add there own fields to to a limited extent. It is a pretty light use so CoreData isn't what I really want, plus migrating to future structures is an issue with CoreData.
This will be simple objects in an NSMutableArray. I can use an array of NSMutableDictionaries or perhaps an array of class-based custom cocoa objects. One nice thing about the object route is that I can have some fields (properties) be based on a calculation rather than real storage like they'd be in an NSMutableDictionary. E.g. NSNumber length NSNumber width NSNumber area In an object area could be a method returning length*width instead of an instance var for area. The trouble comes in the fact that I need to be able to add properties at runtime. For the dictionary option, it is easy - just make sure the key names don't collide and I can add more keys to each dictionary. But for the objects I don't see a nice way to do this There is setValue:forUndefinedKey: and then each object could keep a local dictionary of these "defined at runtime" keys. Thoughts on this? _______________________________________________ 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
