Laurent Sansonetti
lsans****@apple*****
Mon Dec 11 00:55:35 JST 2006
Hi, Mmh I see your point. I'm not sure if it's really interesting here as it's very usual to have nil values in Ruby arrays, and you probably don't expect to get an exception if you pass this array to Cocoa. Also, NSNull was specifically created for this usage, to put nil values in collections, most probably because nil isn't an object in ObjC. It's common to get NSNull objects when deserializing a properly list for example. You said that it might be used unexpectedly (so be a bug), do you have some test cases? # I would recommend to translate nil to NSNull, as we already translate strings to NSString and etc... Laurent On Dec 10, 2006, at 1:36 AM, kimura wataru wrote: > Hi, > > My purpose of this feature is to find bugs caused by unexpected > nil, not to avoid crashes. > > Programmers can use explicitly NSNull. > I think most of nil/NSNull values in an NSArray do not follow > Cocoa-programmers' intention. > > On Sat, 9 Dec 2006 19:52:27 +0100, Laurent Sansonetti wrote: >> Hi, >> >> Actually, from >> http://developer.apple.com/documentation/Cocoa/Reference/Foundation/Classes/NSNull_Class/Reference/Reference.html >> : >> >> "The NSNull class defines a singleton object used to represent null >> values in collection objects (which don’t allow nil values)." >> >> So according to this comment it should be safe to use it in NSArray/ >> NSDictionary. Also, it just inherits from NSObject, so it's a very >> basic class that shouldn't cause problems. >> >> # I can ask investigate more if you want. >> >> Laurent >> >> On Dec 9, 2006, at 4:11 PM, kimura wataru wrote: >> >>> Hi, >>> >>> There are no descriptions about NSNull value in class references >>> of NSArray and NSMutableArray (except archiving). I suppose using >>> NSNull into NSArray leads unexpected results. >>> > > -- > kimura wataru > _______________________________________________ > Rubycocoa-devel mailing list > Rubyc****@lists***** > http://lists.sourceforge.jp/mailman/listinfo/rubycocoa-devel
