Abstract Heresies

This is an anecdote, not a data point, yet. I'm a firm believer in functional programming and I consider myself a `mostly functional...

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 ...

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

An anonymous reader requested an implementation of FOLD-LEFT , FOLD-RIGHT and NAMED-LET. Here they are: https://github.com/jrm-code-proj...

Suppose you satisfy these axioms: you have a binary function • and a set that • is closed over ( i.e. for all x , y in the set, x • y ...