Abstract Heresies

If you have a unary function F, you can compose it with function G, H = F ∘ G, which means H(x) = F(G(x)). Instead of running x through ...

Mark Friedman just released his Scheme-JS interpreter which is a Scheme with transparent JavaScript interoperability. See his blog post at...

Zach Beane has released the latest Quicklisp beta (January 2026), and I am pleased to have contributed to this release. Here are the high...

I did the Advent of Code this year using Common Lisp. Last year I attempted to use the series library as the primary iteration mec...

One of the core ideas in functional programming is to filter a set of items by some criterion. It may be somewhat suprising to learn th...

When you play with these AIs for a while you'll probably get into a conversation with one about consciousness and existence, and how i...

Here are some simple puzzles to exercise your brain. 1. Write partial-apply-left , a function that takes a binary function and the left...