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  • Guru: RPG Sorting and Searching, A 7.2 Update

    September 5, 2018 Susan Gantner

    Author’s Note: This is the second update I’ve done to a tip I originally wrote back in 2008. In 2010, I updated the code to use SORTA with array data structures. Here in 2018 I’m updating it once more — this time to use free-form declarations in place of the D specs, including a more obvious way to code the nested data structure used in some of the examples and references to more recent tips for handling very large arrays. The 2010 version was entitled “. . . A 7.1 Update.” I’ve renamed this one as “. . . A …

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  • Guru: An Introduction to Processing XML With RPG, Part 3

    September 5, 2018 Jon Paris

    Author’s Note: In part 1 and part 2 of this XML series, I introduced you to the basics of using RPG’s XML support. In this tip we begin to explore some of the challenges that you may face when processing commercial XML documents, and the support XML-INTO offers to handle them. In particular we will be reviewing how to ignore parts of the document through the use of the path= %XML option. We will also review how to handle XML documents that make use of namespaces and how to handle XML element names that include characters that are not valid …

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  • Guru: Handling Constraint Violations In RPG

    September 5, 2018 Paul Tuohy

    Author’s Note: The contents of this article were originally published as two separate articles – Handling Constraint Violations in RPG and Handling Constraints Revisited. The content of the article has been updated for free form RPG and some of the coding enhancements that have been introduced, into RPG, since 2009.

    Constraints have been around for a long time but apparently have not quite made it into every programmer’s tool kit. This is partly explained by the fact that implementing constraints in an existing application can be tricky, but it doesn’t explain why constraints are not used extensively in new …

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