• Guru: Dynamic Arrays Come To RPG

  July 20, 2020 Jon Paris

  Some 12 months ago, when the 7.4 release was announced, I wrote the Guru Tip “7.4 Brings New RPG Goodies” describing the features of 7.4 that were also available on 7.3. I said at the time that I would return later to discuss the 7.4-only features. So now that a significant number of shops have access to 7.4 that time has arrived.

  Dynamic arrays are the answer to the perennial programmer question: “Just how big do I need to make this array?” In my experience it doesn’t actually matter how big you make it, at some point down the road …

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• Guru: The Case for Mixed-Case Procedure Names

  July 14, 2020 Paul Tuohy

  Using mixed case makes source code easier to read and easier to debug. I programmed in all upper case for many, many years, so I don’t recoil in horror when I see something in all uppercase. However, it’s a bit more difficult for developers who aren’t quite as long in the tooth as I am. To them, all uppercase is pretty abhorrent and bad (and I don’t mean bad as in good).

  There is a potential case issue with subprocedure names: there are at least three places on the system where the system shows subprocedure names in uppercase, regardless of …

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• Guru: RDi V9.6, Part 9 – RDi Helps with Refactoring Code into Procedures

  July 6, 2020 Susan Gantner

  I’m guessing that you have some RPG code in your shop that’s desperately in need of some refactoring. I have yet to visit an RPG one that wasn’t in that position. If by chance you don’t know what I mean by “refactoring” or why you may need it, I highly recommend that you read Ted Holt’s excellent series of Guru tips on refactoring RPG. I’ve included links to those tips in the Related Stories section below.

  I was inspired to go back and review the entire series after I attended Ted’s session Refactoring RPG: What, Why & How at an …

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• Guru: Use The Administration Runtime Expert To Validate Your System Configuration

  June 22, 2020 Dawn May

  Using the Administration Runtime Expert (ARE) to validate system configuration settings is an easy way to confirm configuration values are set the way you want them to be. You can use ARE to ensure these system configuration settings are consistent across multiple IBM i partitions or to verify settings have not changed on an individual partition. In this second in a series of articles on ARE, we’ll walk through the steps to set up a basic template to validate system configuration settings.

  The first step is to identify what system configuration attributes you want to make sure are consistent or …

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• Guru: SUBSET on EXECUTE and OPEN

  June 15, 2020 Paul Tuohy

  The DB2 for i Enhancements in IBM i 7.3 Technology Refresh 8 / IBM i 7.4 Technology Refresh 2 just made dynamic SQL, embedded in RPG, a lot easier to use. It includes an enhancement entitled USING SUBSET on EXECUTE and OPEN with Extended indicators. This enhancement provides a simple and effective solution to a problem that I first highlighted in an article I wrote back in September of 2015. (See A First Look At SQL Descriptors.)

  The “problem” we are dealing with is how to handle a variable number of host variables being used in a dynamic …

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• Guru: Graphical Debugging Through ACS

  June 8, 2020 Ted Holt

  ACS (IBM i Access Client Solutions) keeps getting better and better. I can’t stay up-to-date with the latest releases of all the software I use, but I do everything I can to keep up-to-date with ACS. One of the handiest of the relatively most recent releases is the ability to access IBM i Debugger through Run SQL Scripts. If you haven’t tried IBM i Debugger, you’re missing out.

  IBM i Debugger (a.k.a. System Debugger) is part of the IBM Toolkit for Java. It’s graphical, and it makes the green-screen debugger (STRDBG) look like something built by cavemen. To show you …

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• Guru: RDi V9.6, Part 8 – Better Ways To Copy Members, Manage LIBLs, and Find Preferences

  May 18, 2020 Susan Gantner

  If my crystal ball had told me just how many RDi V9.6 fix packs there would be and, more importantly, how many great new features would be added, I might have thought differently about starting a numbered series! Looks like I may well make it into double digits. But I’m not complaining. RDi has always been a great tool, and the pace of significant new functionality added since late 2017, when V9.6 first appeared, has reached new heights.

  This tip covers some of the features added in V9.6.0.7. Yes, I still have some catching up to do since 9.6.0.8 recently …

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• Guru: RDi V9.6 Part 7 – Zoom in, Know Where You Are, Refactor Constants and More

  May 11, 2020 Susan Gantner

  RDi enhancements just keep coming. Since my last installment in this series on V9.6 there have been more fix packs and quite a few new features. Here in part 7 I’ll cover refactoring character constants, two ways for RDi to indicate “you are here”, and a small but really useful way to zoom in on your code. Plus a small bonus item for those who do their compiles in batch.

  You Are Here!

  Two new features were added in 9.6.0.6 that act a bit like those “you are here” indications on maps. When editing RPG code, it tells you if …

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• Guru: Calling RPG Programs From Python, Part 2

  April 27, 2020 Mike Larsen

  In Calling RPG Programs From Python, Part 1, I showed how to call an RPG program from a Python script passing single string parameters as input and output. In the second part of this series, I’ll make the process a little more robust by passing a data structure to the RPG program.

  The first part of the Python script (shown in the first piece of code below) imports the itoolkit modules and assigns them to local names. Next, I set up the first command that adds a library list entry to where the RPG object resides.

  from itoolkit import 

  …

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• Guru: A Simple, Effective Way To Compare Data Using SQL

  April 20, 2020 Ted Holt

  One thing I have learned over the years is that no matter how much technology changes, people always ask the same questions like: “Why does the computer say we have 50 widgets when we only have 45?” and “Can you tell me who changed the due date of order number 12345?” and “How do sales of widgets this year compare to the same time last year?” It is the last of these that I wish to address today.

  Comparing data is a very common activity. Everybody compares data: sales people, production people, purchasing people, and of course management people. This …

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