Jon Paris
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Guru: Sorting In Teraspace
January 29, 2018 Jon Paris
In an earlier tip, Teraspace To The Rescue, I discussed how to use teraspace in RPG to permit the storage and manipulation of data that requires more storage than RPG’s 16MB limit. In this tip I am going to discuss how such data can be sorted. Hint: SORTA won’t work!
Before I get to that though, there is one thing I should mention. In that original tip I said: “For reasons I have never understood, DEALLOC will not null your pointer. So it is a good idea to do it yourself. . . .” IBM’s Barbara Morris pointed out, …
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Guru: Teraspace To The Rescue
August 14, 2017 Jon Paris
Hey, Jon:
My team has been trying to resolve a problem for the last few weeks and they are running into several obstacles. The main one has to do with RPG restrictions for data structure length.
We use a third-party program to process transactions. In the latest version, the vendor has increased the length of the fields in the data structure that we have to pass them. After our programs were changed to accommodate this increase, the RPG program would not compile because the DS exceeds 16,733,104 bytes. The vendor has told us to use teraspace but by itself that …
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Guru: Fundamentals Of Prototyping, Part 1
July 24, 2017 Jon Paris
In my series on parameter passing fundamentals, I mentioned the importance of using prototypes to help ensure consistency of parameter definitions; i.e., to help ensure that the parameter passed to the called routine matches what is expected. After that article was published, it came to my attention that many of my readers were unaware of some of the additional capabilities of prototypes, in particular that prototypes can not only identity errors in parameter usage, but that in some cases they can actually fix them for you!
Before we can begin, though, it would be a good idea to ensure that …
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Guru: MiWorkplace As An Alternative To SEU
March 13, 2017 Jon Paris
From time to time somebody will recommend an application to me and it sounds really useful – until I discover that it is Windows Only. Whenever that happens I usually go to one of the Alternative To websites, such as AlternativeTo.net, to see what I can find.
Recently I was asked if there were any alternatives to SEU by a programmer who wanted to use fully free RPG and was tired of the green screen blobs all over his code. (See the example below if you don’t know what I mean by this.) This was a topic that …
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Guru: Parameter Passing Fundamentals Of Programs Versus Procedures
February 20, 2017 Jon Paris
In my earlier tip, Fundamentals: Parameter Passing, I discussed the basics of parameter passing and the importance of ensuring that parameter lengths and data types match those expected by the called routine. In this tip I want to go one step further and discuss differences between passing parameters to programs and to procedures.
Let’s start with passing parameters between programs. In particular, I will focus on the impact of passing fewer parameters than the called program is expecting because this is one area in which programs and procedures differ, and a failure to understand that can lead to some …
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