On May 28, 2013, at 9:46 AM, Steve Mills wrote: > On May 28, 2013, at 08:39:21, Alex Zavatone <z...@mac.com> wrote: > >> Though it's clearly defined in the docs when to use NSMubleAnything vs. >> NSAnything (insert Array, Dictionary, String, etc for Anything), there is no >> compiler warning when you perform a simple action such as allocate a string >> and then reassign values to it. >> >> With this in mind, what exactly constitutes a mutable action? >> >> If we take this: >> >> NSString *myString; >> myString = @"Hi"; >> myString = @"Hi there"; >> >> I'm clearly expecting some type of warning from the compiler when myString >> is redefined, but I don't see one in Xcode 4.6.1. Is this redefinition not >> a mutable action? It sure seems like it is. > > The example you've given is not changing the string, it's simply pointing the > string pointer to a new string (changing the address it points to). This > would require a mutable string: > > [myString appendString:@"Hi there"]; > > because it's changing the string, but it will leave myString at the same > pointer address.
Excellent. This is part of the information that I'm looking for. _______________________________________________ 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
