On Oct 29, 2010, at 7:52 AM, Graham Cox wrote: > > On 29/10/2010, at 10:44 PM, Roland King wrote: > >> It should work the way you've done it in a NSDictionary. >> >> Yes the numbers created by +numberWithUnsignedInteger: are distinct objects >> (normally, if I use low numbers they actually aren't, one of Cocoa's little >> optimizations I guess), however they compare as equal with isEqual: or >> isEqualToNumber: >> >> NSDictionary uses isEqual: so it should find it with no issue.
Not only that, it copies its keys. Although in this case -copy probably doesn't create a new object (since NSNumbers are immutable), in the general case you should code as if it does anyway. >> I just threw together a 10 line program which does that, puts an entry into >> a dictionary keyed on an NSNumber representation of an NSUInteger and gets >> it out with another distinct NSNumber of the same NSUInteger, it finds it. I >> did also test in that case that the two NSNumbers were distinct, they were. > > > Of course, you're quite right, which is why I thought it would work in the > first place. > > Having put it back to not using the static array, it's now working fine! > Gremlins.... Happens all the time. Someone should really do a study on why putting code back the way it was fixes bugs, especially after one has posted to cocoa-dev. :) --Andy > > OK, need to try and work out why this didn't work first time around... > > --Graham > > > > > _______________________________________________ > > 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/aglee%40mac.com > > This email sent to ag...@mac.com _______________________________________________ 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
