• Consider Modernizing Your Approach to IBM i Security, Too

  November 10, 2021 Alex Woodie

  Many IBM i users are facing the reality that they need to modernize their IBM i applications, especially those based on monolithic blocks of fixed-format RPG. But other aspects of the IBM i experience can use some renovating too, including how organizations manage their security settings. Luckily, in the last few Technology Refreshes to IBM i, IBM has provided a slew of new SQL-based services for doing just that.

  Traditionally on IBM i, administrators had two main approaches for viewing and changing security settings. They could view and control the settings directly using commands, often automated through CL programs. Or …

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• IBM i Developer Day This Week

  November 10, 2021 Alex Woodie

  IBM i developers of all stripes are welcome to IBM i Developer Day, a free virtual event that’s scheduled to take place next Friday, November 19, at 1 p.m. ET. Organized by Liam Allan, the event will feature a heavy dose of Visual Studio Code (Allan’s favorite IDE) plus discussions hosted by IBMers on the future of IBM i and its role in the cloud.

  The world of application development is moving fast, but many IBM i pros are still stuck in the past when it comes to the tools, technologies, and techniques they use. While RPG and COBOL development …

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• Guru: Abstract Data Types and RPG

  November 8, 2021 Ted Holt

  An abstract data type (ADT) is a type of data and a set of operations defined over that type of data. Using ADTs allows a programmer to work with data in terms of functionality rather than physical representation. The ADT is the basis of object-oriented programming. Does that mean that abstract data types don’t apply to procedural languages like RPG? Not at all. Quite the contrary.

  Before I show you how you can use abstract data types in RPG-based applications, let me further illustrate abstract data types with another, non-OO object — the user profile. The user profile is a …

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• PHP Is Here To Stay: PHP 8 And Beyond

  November 1, 2021 Mike Pavlak

  In 2005, PHP ushered in the era of TRUE open source development on IBM i with version 5.3 of the language, thanks to the dedicated efforts of Zend and IBM Rochester. PHP had just gone through a major evolution and was taking the world by storm in the middle of the Version 5 phenomena.

  Many IBM i developers were rapidly wrapping their heads around this wildly popular scripting technology with code stored in IFS files and Db2 data popping up on pages running directly on IBM i. Nearly every website on the web that was not HTML had some flavor …

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• Guru: Flexible Interfaces

  November 1, 2021 Ted Holt

  The details are murky, it’s been eons ago. Probably the mid-1990’s. I was working on an AS/400 that ran a mixture of System/36 and native applications. I needed to call a program that had been written in the latest version of RPG from both S/36 RPG II and native RPG III (a.k.a. RPG/400) programs. I hope I’m remembering this correctly. It’s been so long.

  The problem I ran into was rooted in a numeric parameter. S/36 programs passed numeric parameters in zoned decimal format, whereas native RPG and CL programs used packed decimal. The called program defined the parameter as …

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• Technical Debt: The Silent Killer

  October 27, 2021 Alex Woodie

  There’s a dangerous malady afflicting companies that rely on the IBM i server to run their business applications. Left undiagnosed and untreated, it can debilitate an IT shop, rendering it unable to take advantage of new opportunities and respond to challenges. It’s called technical debt, and you or an organization you know may be suffering from it as we speak.

  Technical debt is a concept that is credited to Ward Cunningham, the American programmer and the co-author of Manifesto for Agile Software Development. “If you develop a program for a long period of time by only adding features but …

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• Guru: Quick And Handy RPG Output, Take 2

  October 25, 2021 Ted Holt

  I am pleased today to revisit a topic I wrote about just over seven and a half years ago. I do so for two reasons. First, I’ve made a slight improvement to my routine. Second, I’d like to provide more examples of this routine in action. My previous article suffered from a paucity of examples. I can’t believe I let that happen.

  I’m talking about the writeln subprocedure, a handy routine that I use to write unstructured text to a spooled file. I derived the inspiration for this routine from Pascal, a programming language I used heavily when I was …

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• Expanding Fields Is A Bigger Pain In The Neck Than You Think

  October 20, 2021 Andrew Ireland

  Remember the Y2K problem, when companies had two-digit dates for years in their applications and the millennial turn was coming and they suddenly needed a four-digit date so all the math would work out right comparing the present, future, and past? Well, every time you need to change a field length in your source code – which almost always means making it bigger, not shorter – you have to suffer through a mini Y2K crisis.

  Yes, the Y2K crisis did not bring an end to civilization as we knew it, as some were prognosticating and maybe a few were hoping, …

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• Guru: What Is Constant Folding And Why Should I Care About It?

  October 18, 2021 Ted Holt

  Constant folding is a compiler-optimization technique, whereby the compiler replaces calculations that involve constants with the result values when possible. Constant folding is common in modern compilers, and according to the RPG reference, the RPG compiler uses this technique. (See the documentation of the %div and %rem functions, for example.)

  But you and I don’t write compilers. We write business applications. Why then should we care about constant folding? That’s a question worth pondering.

  Consider how I used to have to write RPG in the Dark Ages.

  C                     MOVE CUSTNR    CUSTSV  50
  

  Here I’m copying the customer account number to …

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• End of Life Looms for PHP 7.3

  October 13, 2021 Alex Woodie

  Organizations that are running PHP version 7.3 have just over a month to upgrade to a newer version and avoid losing bug fixes and security fixes when 7.3 hits the end of life (EOL) on December 6. The good news is that PHP version 7.4 and 8.0 are stable and will be supported for some time. The not-so-good news is it appears a large number of IBM i shops are still running older releases of the PHP language.

  According to an informal poll conducted by Seiden Group last month, about half of the IBM i shops that participated in a …

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