AntlrI4DE is an Eclipse plugin for editing Antlr4 grammars. One of the features I used to really like in the original Antlr IDE was the ability to generate railroad diagrams. It turns out that Antlr4IDE has this feature, so I decided to give it a try. My jvmBasic grammar is here, and you can take a look at the railroad diagram here.
I recently found myself in a situation where mission-critical software was suffering from performance problems due to relying on a remote API which was both slow (as slow as 11sec / transaction), and unreliable. In this case, it turned out that there were multiple applications accessing this API, and every individual application was affected….
I’ve always had a fascination with compilers. As a Java geek, I’m also quite interested in the JVM. In order to learn a little more about both, and as a way to contribute to the open source world, I decided to implement a compiler for BASIC. So, jvmBasic consumes BASIC code and emits .class…
We have an Arctic Spa at our house which we enjoy. Recently, an OpenAPI spec has been published for it, so I decided to write a Java wrapper so I could control the spa myself, and monitor temperature with Prometheus and Grafana. The resulting code is here. The wrapper class “com.khubla.kspa.Spa” takes care of all…
I recently had a reason to parse a large data set, for another project. I decided that an ideal “large data set” would be my Outlook mail saved archives. Sadly, Outlook for Mac doesn’t output PST files, it outputs OLM archives, which are, essentially, giant zip files full of XML. I was coding this all…
I’ve been interested in HTML parsing for a while now. There are a number of reasons to do this, such as: Validating that what claims to be HTML, is HTML Finding every style sheet and script in an HTML file Pretty-printing Syntax highlighting Linting Translating between markup languages, for example generating JSPs from PHP, or…
I recently had a chance to learn a little about Bioinformatics, and ended up browsing the NIH’s database of genomes here. Inside the genome data for any particular strain of a species, you’ll find various files with file extensions like “ffa”, “fna”, “ffn” and “frn”. These are FASTA files. If you’d like an example, here’s…