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. -- Steve Mills office: 952-818-3871 home: 952-401-6255 cell: 612-803-6157 _______________________________________________ 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
