This article is an excerpt from the book subfiles in free format rpg. As a registered member of, youre entitled to a complimentary copy of chapter 7 of subfiles in rpg iv. Profound logics alex roytman and liam allan are here to show you how freeformat rpg and node. Rules, examples, techniques, and other cool stuff by kevin vandever 20110809. Programming in ile rpg the definitive guide to business. Author of the definitive 2000 work subfiles in rpg iv. Single page subfiles nick litten is ibmi, as400 iseries. The essential guide to free format rpg factor 1, if there is one, follows the operation code. Kevin vandevers subfiles in rpg iv mc press, 2000 offered easytounderstand explanations of subfile concepts plus a bounty of practical examples, advanced techniques, and other cool stuff never before seen in subfile books. Free format rpg now encompasses nearly all functional aspects of the language, and this third edition of free format rpg iv brings you uptodate on all the latest features. In the meantime, refer to this post to see an rpg iv version of this. This book gives you the concepts, styles, and advanced techniques using freeformat rpg that will enable you to become a subfile master in.
Rules, examples, techniques, and other cool stuff, this updated and expanded work is brought up to the present with freeformat rpg examples and other new material. International technical support organization who knew you could do that with rpg iv. I would really like to have rpg tnt in ebook and my. Now, this popular manual has been updated from beginning to end to teach subfile concepts and programming techniques using freeformat rpg. Aug 21, 2003 for each topic, the book offers concepts, explanations, and practical examples you can use as templates for further development. The book has been reorganized and updated to the newest software release. The sfile keyword is used to define internally the subfiles that are specified in. A comprehensive resource that can be used by rpg programmers a. Chain, readc, update, or write operation codes can be used for subfile record format to transfer data between the. The examples are written in ile rpg iv rpg iii programmers will find the book useful, as well, and do a nice job of showing off recent rpg iv enhancements by incorporating them in the examples. Modern rpg for the modern programmer december 2016 sg24540201. If the indicators cannot share the same space in the rpg program, you can declare a separate screenspecific data structure for each format. Transform legacy rpg code to modern freeformat rpg and node. This book gives you the concepts, styles, and advanced techniques using free format rpg that will enable you to become a subfile master in.
Kevin vandever 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. Rules, examples, techniques, and other cool stuff enter your mobile number or email address below and well send you a link to download the free kindle app. Best books on as400 code400 the support alternative. This bookboth learning tool and handy reference guideprovides the information you need to learn this powerful way of coding. Rules, examples, techniques, and other cool stuff by kevin vandever 2011, paperback, new edition at the best online prices at ebay. Rules, examples, techniques, and other cool stuff by kevin vandever available from rakuten kobo. Now, this popular manual has been updated from beginning to end to teach subfile concepts and programming techniques using free format rpg. Traditional fixedformat rpg programmers everywhere are embracing the increased productivity, better readability, and easier program maintenance that comes with the freeformat style of programming in rpg iv. Rules, examples, techniques, and other cool stuff by kevin vandever 20110809 kevin vandever on. Additional builtin functions at that time also helped to modernize rpg ivs procedures. To use a subfile for a display device file in an rpg program, you must specify.
This technique lets you update, add, and delete from a name file, which ill call name master file maintenance. With updated code that shows modern methods, such as ile strategies and freeformat rpg, this reference offers a. A simple example of a subfile and accompanying program written in modern fully free rpg. Unlike other books on the topic, this one specifically focuses on coding subfile applications in freeformat rpg and does an excellent job of explaining how to use subfiles in the modern rendition of the rpg language. A comprehensive resource that can be used by rpg programmers as they advance from basic subfile usage to more advanced p.
Rules, examples, techniques, and other cool stuff ebook. Aug 05, 2012 deject d d recommended indicator usage for display files d d d indicator description d d 01 turns off the overlay when writing msgct d 10 subfile record dspatrhi d 20 subfile foldunfold mode d 21 subfile 1 end and enable rollup key d 22 subfile 2 end and enable rollup key d 23 subfile 3 end and enable rollup key d 24 subfile 4 end and. Enter your mobile number or email address below and well send you a link to download the free kindle app. Subfiles in freeformat rpg by kevin vandever overdrive. This book gives you the concepts, styles, and advanced techniquesusing freeformat rpgthat will enable you to become a subfile master in your own right. The nook book ebook of the subfiles in freeformat rpg. 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. Subfiles in freeformat rpg rules, examples, techniques, and other cool stuff. Product description look inside the book author bio specifications advanced, integrated rpg shows you how to take advantage of the latest technologies from within existing applications.
In this article, youll learn one way to modify data files using subfiles. The specifics on subfiles ccording to ibm, a subfile is a group of records that have the same record format and are read from and written to. Rules, examples, techniques, and other cool stuff written by kevin vandever and published by mc press. These fields are referenced from the physical file sfl001pf. This is the format that will actually contain the subfile data. It is also the format that will be written to in your rpg program. With updated code that shows modern methods, such as ile strategies and freeformat rpg, this reference offers a bounty of practical examples and advanced. I have developed lots of subfile programs, and read the other books on the subject. Overview an updated manual for mastering subfiles 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.
Subfiles in freeformat rpg guide books acm digital library. Traditional fixedformat rpg programmers everywhere are embracing the increased. Posts about rpgfree subfile programming written by ben. Going to buy some books on as400, name two books which are best for beginners focussed mainly on subfiles, printer files,modular programming with examples. Rules, examples, techniques, and other cool stuff by kevin vandever overview 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. Free format rpg uses many of the same operation codes.
Focusing strictly on teaching freeformat rpg programming methods, this book will help programmers wishing to upgrade their skills this howto guide offers a concise and thorough introduction to the increased productivity, better readability, and easier program maintenance that comes with the freeformat style of programming in rpg iv. The subfile was a method of storing data in memory to be presented on the screen in a columnar format much like a list. This book gives you the concepts, styles, and advanced techniques using freeformat rpg that will enable you to become a subfile master in your own right. This chapter, subfiles and data queues a perfect combination, looks at how to incorporate all the features in the program development manager pdm into a subfile. This article is an excerpt from the book subfiles in freeformat rpg. Deliver truly modern application interfaces with profound ui. These templates are fully functioning programs that include both dds and rpg iv code from basic singlepage display subfiles to powerful techniques like recursion, data queues, and embedded sql. Subfiles in free format rpg rules, examples, techniques, and other cool stuff by kevin vandever. Read unlimited books and audiobooks on the web, ipad, iphone and.
Today, freeformat calculations in rpg iv can look like any other modern programming language. A future post will show how the fields defined by this copy member are used in an rpg free subfile program architecture which establishes a programming pattern which is easy to maintain. Todays programmers must have a solid understanding of ibm is traditional concepts and tools, but they also need to know how to take advantage of the latest tools and methods. Read subfiles in freeformat rpg online by kevin vandever books. Focusing strictly on teaching free format rpg programming methods, this book will help programmers wishing to upgrade their skills this howto 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. Then you can start reading kindle books on your smartphone, tablet, or computer no kindle device required. I needed a way to combine the flexibility of the pageatatime subfile with the capability to process the changed records only when desired.
Displaying the data from subfile buffer to the display device. Rules, examples, techniques, and other cool stuff august 2011. Subfiles in freeformat rpg 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. Jun 01, 2000 the examples are written in ile rpg iv rpg iii programmers will find the book useful, as well, and do a nice job of showing off recent rpg iv enhancements by incorporating them in the examples. Now, both new and experienced programmers finally have a complete and uptodate resource for the tools and concepts needed to work.
It can be based on rpg400or rpgle another one may be which focusses on free format and sql rpgle. Today, freeformat calculations in rpg iv can look like. Read subfiles in freeformat rpg by kevin vandever for free with a 30 day free trial. Subfiles in freeformat rpg and millions of other books are available for amazon kindle. The essential guide to freeformat rpg factor 1, if there is one, follows the operation code. A subfile is a temporary place to store data of the same format to be used by a display file program. Youll find a chapter devoted to the new free format h control, f file definition, d definition, and p subprocedure specifications. Now, both new and experienced programmers finally have a complete and uptodate resource for the tools and concepts needed to. Whether youre an ibm i programmer who has not yet made the leap to modern coding with freeformat rpg, ile, and the modelviewcontroller mvc design pattern, or you need more practice with these technologies, you will benefit from this book. Having this book in ebook form allows me to llsten with kindle in text to speech while driving or at work. In subfiles in freeformat rpg, kevin vandever takes the reader through the subfile conceptfrom start to finish. As we go along in this book, i will show you examples of all these techniques because they are coded.
It does this by breaking out areas of responsibility using subroutines. The ibm i operating system running on ibm power systems is a platform in transition. Mastering subfiles is often the defining moment in an rpg programmers career. With pageatatime subfiles, you have to clear and build one new page of subfile records every time the user pages and uses a positionto field. We will cover the basics and definitions of coding subfiles in rpg. Like many of the best features of the as400, the subfile originally appeared on the ibm s38. Rules, examples, techniques, and other cool stuff book online at best prices in india on. Hi guys, going to buy some books on as400, name two books which are best for beginners focussed mainly on subfiles, printer files,modular programming with examples. Subfiles in freeformat rpg rules, examples, techniques, and other cool stuff by kevin vandever. Chain, readc, update, or write operation codes can be used for subfile record format to transfer data between the program and the subfile. Subfiles in freeformat rpg paperback 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 subfiles in freeformat rpg, you will learn how to. The dds for a subfile consists of two record formats.
Then, use a pointer to point the indicators data structure to the appropriate screenspecific data structure before you process that format. Readc read next changed record ibm knowledge center. Subfiles in free format rpg paperback 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. This allows rpg programmers to work faster and more efficiently. A vast amount of business software exists on ibm power systems that provides. A vast amount of business software exists on ibm power systems that provides detailed, secure, reliable information. Freeformat rpg uses many of the same operation codes.
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