What does -> mean?

Question

I\'m a relative newbie to Objective-C (only studied Arron Hillegras\'s book) and am confused by the following snippit of code I\'ve found in one of Apple\'s code examples, i

Answer 1

That indicates a reference to -in this case- an instance variable of an object. Self refers to the object itself, and by writing self->_numbers, you refer to the variable that is part of the class instead of a global variable named _numbers.

Are you sure this is not mentioned in your book?