Join travel writer as this experienced Ruby programmer dig Cocoa framework right from the beginning, answering the same questions and solving the same problem you will encounter. Together you will build a single application that threads throughout the book, and it's not a toy. You will see the development of the first tests of user-interface code, domain-specific languages that take advantage of the small features of Ruby, and other Rubyish tricks. At the end of this book, you'll be ready to write a real Mac OS X application that can be distributed to real users.