NSString is the class. myString is an instance of that class and in this case is a variable. myString is information. Its not an operation. It is a class instance which contains information on what the data is and what can be done with it.
mystring is not a function. copy is a method call to that instance of a class. On Jul 24, 2011, at 10:01 PM, Tom Jeffries wrote: > On Sun, Jul 24, 2011 at 12:12 PM, Andy Lee <ag...@mac.com> wrote: > >> You should know that it is most certainly possible to use that syntax with >> a variable. For example: >> >> NSString *myString = @"abc"; // <== a variable >> NSString *newString = [myString copy]; // <== a message send >> >> You can send messages to both classes and instances of classes. If you are >> not clear about the difference between a class and an instance, let us know >> now so we can proceed on the same page. >> > > > OK, we're each half right- myString in this case is a function, not a class, > but I would question calling it a variable. Maybe I'm old fashioned, but I > think it's important to distinguish between information (variables) and > operations (functions). That is one reason why I'm less than completely > enthusiastic about Objective C syntax and Cocoa conventions. However, I do > understand that using them would make it easier to understand what's going > on. > > I've gotten several interesting hints from the comments, which I appreciate. > I'm going to pursue them, if I don't find a solution I'll see if I can post > a more understandable example. > > Thanks, Tom > _______________________________________________ > > 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/alex%40webis.net > > This email sent to a...@webis.net Alex Kac - President and Founder Web Information Solutions, Inc. "If at first you don't succeed, skydiving is not for you." -- Francis Roberts _______________________________________________ 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
