free-variable.org

Someone asked. Well, I wanted something just a little bit geeky, but the delightful strictly positive has already gone, and terms like 'iota reduction' just don't have the same ring.…

No, not me. Well, I think not. I recently gave a talk to the North East's excellent SuperMonday group on Git (with a brief intro to the main ideas behind…

Beginners in Haskell often get stuck with the design and pragmatics issues. For me, the golden rule is this: think about data structures. By this I mean: work out what…

This site has been set up by  Paul Callaghan. I'll probably use it to discuss various aspects of programming language technology. I like programming, and like anything that helps me…