Monthly Archives: November 2013

Fun with EWD.js and the Raspberry Pi

In this article I want to have some fun and explain how to create and set up two EWD.js applications, one running on a dEWDrop server and the other on a Raspberry Pi.  The fun part is that the application running on the Raspberry Pi will send messages to the application running on the dEWDrop […]

EWD approval by the VA

I have to thank Steve Owen for pointing this out to me: Gaining approval in the VA’s Technical Reference Model (TRM) effectively represents approval by the VA for a specific technology.  I appreciate this very good news as it now appears that there is a growing understanding within the VA of the potential of […]

Testing your EWD.js back-end logic

On the face of it, one of the tricky parts of EWD.js development is testing and debugging your “back-end” logic: by that I mean the JavaScript code that will run within the Node.js environment.  You don’t have direct access to that code because it runs within the child processes created by EWD.js (or more correctly […]

Creating JSON-LD documents from within Mumps

In yesterday’s posting, I explained how the _getDocument() and _setDocument() methods work within EWD.js, mapping between JavaScript objects and corresponding Mumps Globals. In this posting, I want to focus on something that is gaining interest within the VistA community: representing the complex network of data that is held for each patient within FileMan as a […]

JSON-interfacing VistA (and other legacy Mumps systems)

EWD.js is now providing the means by which legacy Mumps-based systems, such as VistA, can be enhanced and modernised by a new generation of JavaScript developers. In this technical article, I’m going to explain how legacy Mumps code, such as core VistA/FileMan APIs, can be wrapped so that they become available to JavaScript developers.  Certainly […]

EWD.js for the Raspberry Pi

I’ve been wanting to be able to run EWD on the $35 Raspberry Pi for ages.  Not only is it an amazing cheap but surprisingly powerful and capable computer in its own right, the Raspberry Pi is very much targeted at the educational sector, with an aim of encouraging a new generation of developers to […]