Aaron Hsu, the author, is now a complete APL (Dyalog) advocate. I similarly have gone from Lisp to J, and now APL. I read the book "Mr. Babbage's Secret: The Tale of a Cypher and Apl". It is more of a history narrative melding a few things together, but it got me back on the array programming languages. I find it is true, that a single page of code is easier for me to rework when I need to review/edit it than pages of well-documented code (Python, C, or other). Racket is now being implemented in Chez.
I downloaded it, but compiler design is not my area. I do like his talks and he champions Iverson's Notation as a Tool of Thought very well. I hope to read it over the holiday.
