I had some time today, so I built a little AJAX application for this blog. It’s an expression calculator. The world really doesn’t need another one, but it was the easiest thing that includes ANTLR for building a lexer/parser/AST and the Google Web Toolkit for building the client. Why? Because it’s fun …
Author Archives: Thomas Weitzel
Geometry for kids
2007-02-10 – 15:10 CET
One of our girls visits the 7th grade (13 years, secondary school) right now. In geometry, they are talking about the congruence rules for triangles and triangles in general. Yesterday’s homework included a geometrical problem: construct the space diagonal of a cube geometrically and specify its length (side length of the cube is 5.3cm).
While this [...]
Creating a WordPress Plugin
2007-02-10 – 13:40 CET
It wasn’t planned that way, but it turned out that I had to write a WordPress plugin myself to solve a problem. I want to have a Google Web Toolkit application run inside my blog. No big deal, but I couldn’t accomplish one tiny detail. GWT applications need a meta tag with the name gwt:module [...]
Programming editors
2007-02-01 – 22:20 CET
Everybody who is programming is using one or more of them. My favorite programming editor is Epsilon from Lugaru Software Ltd., and that since 1996. It’s around since 1984. Although my first version was for DOS, Windows, and OS/2, I used it primarily under DOS for writing C programs. I started in 1978 with a [...]
Problem with Oracle
2007-01-28 – 16:25 CET
While operating synformation together with an Oracle database (prior to version 10g), the following error can occur during page compilation:
FATAL ERROR IN TWO-TASK SERVER: error = 12571
ksedmp: internal or fatal error
This error is logged by Oracle in the user dump trace files. After this error has occurred, no more pages can be compiled. From [...]