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  • Guru: Web Services, DATA-INTO and DATA-GEN, Part 2

    April 12, 2021 Jon Paris

    In Part 1 of this series I discussed the use of DATA-GEN and DATA-INTO to create “blog entries” via a web service. This time I am going to focus on using the GET HTTP method to retrieve blog entries. As you will see the basic process is very similar.

    I am going to start by retrieving a single blog post, but rather than retrieve all of the data associated with the post I will show you how to restrict processing to specific elements. I will then move on to look at two approaches to processing multiple posts. The first processes …

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  • Guru: RPG’s New DATA-INTO

    June 18, 2018 Jon Paris

    In this tip I’m going to give a brief introduction to the latest addition to the RPG language. The new DATA-INTO op-code. DATA-INTO is IBM’s response to the oft-asked question: “When is IBM going to introduce JSON-INTO so we can process JSON as easily as XML?”

    DATA-INTO provides this capability, but IBM has very cleverly given it functionality that goes way beyond what a simple JSON-INTO op-code could ever have done. DATA-INTO is effectively a cross between XML-INTO and Open Access. Like XML-INTO it uses the names of items and their hierarchy to unpack the document into RPG variables. Like …

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