Question Sean Connelly · Jun 7, 2017 Does $system.Version.GetMajor() exist on older releases? My oldest release is 2013 on this computer.Does anyone know how far back $system.Version.GetMajor() goes.Sean. #Caché 0 3 0 275
Article Sean Connelly · Jun 7, 2017 1m read Cogs.JsonClass 1.0 The Cogs.JsonClass library is now available in the Cogs project on GitHub.https://github.com/SeanConnelly/CogsPlease see the README and the /docs folder on how to use the class.Overview #Caché #JSON #ObjectScript #Release 5 5 0 629
Article Sean Connelly · May 31, 2017 28m read Cogs Library Cogs Library Over the next few months I will be releasing a number of open source libraries and tools to the Caché community. Most of the code has evolved from previous production grade solutions over the years and I am collating it together under a single overarching library package that I am calling Cogs. #JSON #Object Data Model #Caché 17 38 4 1.5K
Question Sean Connelly · May 17, 2017 How to handle pre-flight checks in CSP? From a browser, an XMLHttpRequest to a CSP page on a different server will obviously hit the CORS security check.To get around this I can set the Access-Control-Allow-Origin header on that particular CSP class.However, setting any request headers on the XMLHttpRequest object will trigger a pre-flight OPTIONS request.This OPTIONS request is not handled by the target CSP page and the Access-Control-Allow-Origin header is never set, triggering a CORS error. #CSP #Caché 0 3 0 719
Article Sean Connelly · May 15, 2017 2m read Security Alerts Wanna CryMost of you should be aware that the Wanna Cry virus is massively infecting un-patched windows machines all around the world. It's particularly affecting the NHS, one of my main clients. Wanna Cry is one of a line of Viruses that exploit SMBv1 over ports 135 and 445.A kill switch has been enabled, but this won't protect machines sitting behind http proxies, and there are already reports of new versions without a kill switch.All windows machines should be isolated and updated a.s.a.p. #Caché #Security 3 1 0 780
Question Sean Connelly · May 10, 2017 Internationalization Questions I'm looking at adding multilingual support to a couple of open source projects I'm working on. The solutions are already developed in CSP so I am not looking for alternative approaches.I'm wondering what would be the best approach for CSP and separate JavaScript files.Initially I was wondering if I should bake the default system language text at compile time, or provide the end user with a language selection option at run time.I came across $$$TEXT reading the docs... #Caché #Compiler #CSP 1 20 0 555
Article Sean Connelly · Apr 27, 2017 7m read Level up your XDATA XDATA is used for a whole host of ISC libraries to store things like Zen pages, BPL logic and DTL transformations.XDATA is the equivalent of XML config files of the JAVA world and JSON config files of the JavaScript / NPM world.Whilst Atelier looks to shift source code to the disk, XDATA will remain a key component to source control our projects config / meta data. #Object Data Model #ObjectScript #XML #Caché 3 4 0 1.2K
Question Sean Connelly · Apr 19, 2017 WebSockets vs Long Polling vs Short Polling? WebSockets look to be supported reasonably well in Cache. I have yet to use them in production so I am wondering how well it has worked for other developers.In particular what happens when the browser does not support WebSockets, or when a firewall blocks the connection.Have you had to write your own long polling fall-back?I've read the documentation and found this interesting article...https://community.intersystems.com/post/asynchronous-websockets-quick-tutorial #Node.js #Tutorial #CSP #Caché 0 15 0 11.6K
Article Sean Connelly · Apr 18, 2017 1m read TIP: Beautify XML in two lines of COS If your handling XML then it can often be unformatted for human display.Using a little bit of XSLT magic you can format the XML in just two lines of code... #XML #ObjectScript #Caché 6 1 0 648
Article Sean Connelly · Apr 13, 2017 3m read Compilation gotchas and a request for change On the back of my recent post on writing bug-less code I wanted to raise a few suggestions (to ISC) that would help prevent certain types of bugs at compile time. I've probably missed a few, but these are the main ones in my mind. Please contribute more suggestions.Btw, these also serve as potential gotchas for new COS developers. #Compiler #ObjectScript #Caché 4 24 0 1.1K
Article Sean Connelly · Apr 12, 2017 5m read Bug killing development tips Does anyone NOT use a debugger? I can't remember the last time I did. It's not because I don't dislike them, I just don't need to use them. The main reason for this is because I have a certain development methodology that either produces less bugs, catches them at a unit test level, or makes tracking them down much easier. Here are my tips... 1. Write your own COS cheat-sheet. #Best Practices #Tips & Tricks #Caché 19 17 6 1.6K
Article Sean Connelly · Mar 28, 2017 2m read Map, Reduce and Filter Collections Inspired by the article "Declarative development in Caché" that's still trending on the dev com. The OP explored a functional style of iterating over a collection. A comment today suggested "Caché would need syntax support for anonymous functions". With Macros you can kind of get anonymous like syntax using dot notation. This is not production code, but it does work. First the macros... #Caché #Code Snippet #ObjectScript #Mapping #Tips & Tricks 2 15 0 720
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