A comprehensive resource that can be used by RPG programmers as they advance from basic subfile usage to more advanced programming, this manual offers concepts, explanations, and practical examples that reflect current trends. With downloadable templates that include both the DDS and RPG IV code, this resource provides the techniques and styles-from basic single-page displays to powerful methods such as recursion, data queues, and embedded SQL-that enable RPG programmers to become subfile masters. With updated code that shows modern methods, such as ILE strategies and free-format RPG, this reference offers a bounty of practical examples and advanced techniques.

Focusing strictly on teaching free-format RPG programming methods, this book will help programmers wishing to upgrade their skills This how-to guide offers a concise and thorough introduction to the increased productivity, better readability, and easier program maintenance that comes with the free-format style of programming in RPG IV. Although free-format information is available in IBM manuals, it is not separated from everything else, requiring hours of tedious research to track down the information needed. This book provides everything you need to know to write RPG IV in the free-format style. Author Jim Martin not only teaches rules and syntax, but also explains how this modern style of coding has the potential to improve overall programmer productivity--from initial development through maintenance. He methodically covers the many style issues, such as named indicators and built-in functions, and addresses topics including input and output, program flow, data manipulation, math operations, prototyping, and APIs. This third edition is updated to V7.1 of the IBM i operating system on IBM Power machines. An added chapter explains the new free-format H, F, D, and P specifications introduced by IBM in Technology Refresh 7, and programming examples throughout the book are updated to reflect the new specifications.

Sketching User Experiences approaches design and design thinking as something distinct that needs to be better understood—by both designers and the people with whom they need to work— in order to achieve success with new products and systems. So while the focus is on design, the approach is holistic. Hence, the book speaks to designers, usability specialists, the HCI community, product managers, and business executives. There is an emphasis on balancing the back-end concern with usability and engineering excellence (getting the design right) with an up-front investment in sketching and ideation (getting the right design). Overall, the objective is to build the notion of informed design: molding emerging technology into a form that serves our society and reflects its values. Grounded in both practice and scientific research, Bill Buxton's engaging work aims to spark the imagination while encouraging the use of new techniques, breathing new life into user experience design. - Covers sketching and early prototyping design methods suitable for dynamic product capabilities: cell phones that communicate with each other and other embedded systems, "smart" appliances, and things you only imagine in your dreams - Thorough coverage of the design sketching method which helps easily build experience prototypes—without the effort of engineering prototypes which are difficult to abandon - Reaches out to a range of designers, including user interface designers, industrial designers, software engineers, usability engineers, product managers, and others - Full of case studies, examples, exercises, and projects, and access to video clips that demonstrate the principles and methods

This guide teaches programmers who have been left behind in the IBM i's evolution to code more productively and modernize their business applications. Shirey uses a casual, humorous teaching style to explain the concepts, along with plenty of code examples. Readers will gain confidence in areas that may be new to them and use the provided examples to practice what they've learned. The manual is structured so that whether they are using the latest IBM i technology or an older version, readers will learn methods to improve coding and applications, as well as become comfortable with writing programs using ILE RPG, free-format RPG, and Model-View-Controller (MVC).

This book begins with easy-to-understand explanations of subfile concepts then goes on to offer a bounty of practical examples, advanced techniques, and other cool stuff never before seen in subfile books. It is a comprehensive resource you will use over and over as you advance from basic subfile usage to gurulike mastery of subfile programming. This book provides you with the concepts, styles, and advanced techniques using RPG IV and ILE that will enable you to become a subfile master in your own right.