Today it was my fourth (I believe) encounter with APL:

• First, too many years ago when skimming through Tim Budd’s “The Kamin Interpreters in C++” (and the Kamin book afterwards). For the hardcore fans, Tim Budd has a book on implementing an APL compiler.
• Next was a Dr Dobbs issue about the J programming language.
• Some years a ago a comment on this blog about Dyalog.

Today it was Functional Geekery’s Episode 65 where I found out about the most interesting (to me) implementation of Conway’s Game of Life.