I have to admit I got to https://www.jsoftware.com/ioj/iojATW.htm and seriously considered if the site is just pulling my leg. I think they're being sincere but I can't be 100% sure.
I think this seems insane from programmer land, but quaint from pure math land.
(I say this as someone who got filtered by pure math!)
Not a joke, and a famous piece of J lore!
There have a been at least a couple attempts I've seen posted here of blog posts breaking down the code in a beginner friendly way. One I dug up is: https://blog.wilsonb.com/posts/2025-06-06-readable-code-is-u...
Related: https://needleful.net/blog/2024/01/arthur_whitney.html