More on RPG Encapsulation
by Joel Cochran

Reader response to my July article, "Encapsulating File Access in a Service Program," filled my mailbox for some time. Most of the feedback has been extremely positive, with readers wanting information on some of the more advanced techniques I referred to but didn't have column space to explain. READ MORE >

Advanced Pattern Matching in RPG
by Michael Sansoterra

SQL has many great features, including the LIKE predicate. LIKE's power is manifest in its ability to have multiple wild cards in a search pattern. Unfortunately, RPG's closest analog to LIKE is the %SCAN built-in function, which is limited to searching a string for a single substring. READ MORE >

  The Dangers of Temporarily Changing User Profiles
  Hey, Ted:

In "Monitoring for System Request Menu Option 2," you answered a question from Paul, who needed to write a CL program that temporarily changes a user profile. I always worry when I hear someone is going to temporarily change a user profile and then change it back. Lots of things could happen that would cause problems. Paul realized System Request menu option 2 (ENDRQS) could cause problems that would prevent him from returning the user profile to its original state. What neither you nor Paul mentioned, however, is that options 1 and 90 from the System Request menu could also cause problems. READ MORE >

Correction

The article "How to Use the *NOPASS and *OMIT Parameter Options" has been corrected since its original publication. In the last section of code, the "date" and "dateIn" variable names were presented in the wrong order. IT Jungle regrets the error. [Correction made 1/6/05]

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