Jekejeke Prolog 1.3.3 (HTML5/JavaScript plug-in)

Jan Burse, created Dec 27. 2018

Dear All,

We just uploaded a new release of Jekejeke Prolog. We made an experiment with a new HTML5/JavaScript plug-in based on the CheerpJ transpiler.

- New prolog flag sys_hint:
  We provide now access to our Prolog flag sys_hint and a new value HINT_WEB (3). This value changes some of the behaviour of the Prolog interpreter so that it can run in the CheerpJ threads which behave as fibers. 

- New command line option -w:
  We provide a new command line option -w which sets the Prolog flag sys_hint to HINT_WEB and reduces the GUI until some CheerpJ issues have been resolved. This can already be used to run the Prolog interpreter inside a HTML5/JavaScript page, for example in a Safari Browser on an iPad:

   <script src="https://cjrtnc.leaningtech.com/1.3/loader.js"></script>
   <script>
    cheerpjInit();
    cheerpjCreateDisplay(800,600);
    cheerpjRunJar("/app/asterix/interpreter.jar", "-w");
   </script>

- New applet class:
  There is a new class jekpro.platform.asterix.AsterixApplet which also sets the Prolog flag sys_hint to HINT_WEB and reduces the GUI. By using the Chrome browser and where the CheerpJ applet runner is available, we can again run our Prolog interpreter inside a HTML5/JavaScript page:

   <applet
        archive="interpreter.jar"
        code="jekpro.platform.asterix.AsterixApplet"
        width="600"
        height="520">
   Applet could not be loaded.
   </applet>

Disclaimer: We are not affiliated with Leaning Technologies, the provider of CheerpJ, and our technical experiment also does not imply some endorsement. Some benchmarks have revealed that under CheerpJ Java runs 10-15 times slower, so there is still a lot of head room for JavaScript transpilers.

Happy coding!

Android Appstores:
Google Play

Download:
Jekejeke Runtime

Comments