On Thursday, June 10, 2010, Kyle Sluder <kyle.slu...@gmail.com> wrote: > On Thu, Jun 10, 2010 at 1:58 PM, Frederick C.Lee > <frederick_...@apple.com> wrote: >> Greetings: >> I have a situation where I need to access a member of a mutable array >> (max 4 members). >> Sometimes I could get an out-of-bounds exception, if for example, I try to >> access member #3 out of a 2-member array. >> It's not serious, I could just ignore it and continue. > > No, you cannot. It is illegal and must not be done. > > Just check the count of the array before accessing it. But the fact > that you have this possibility at all is indicative of poor design.
It's not illegal; objectAtIndex: is documented to throw a range exception if you access something off the end. Relying on that is just using documented behavior. It's not a good idea and is deeply contrary to standard Cocoa idioms, but it's in no way illegal. Mike _______________________________________________ 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
