Really like the introduction by the way, it reads better than most I've read on apl/k - with a suitable mix of motivation and explanation - and not too much "pr

Really like the introduction by the way, it reads better than most I've read on apl/k - with a suitable mix of motivation and explanation - and not too much "pride" (like, lisp pride, or apl pride, where authors cannot imagine any reason why other languages exist. Seems especially common when run-times are written in such a language; namely C...). To be clear, a little language pride is always warranted :-) Other than that, I find it a bit funny that the factorial function is singled out as an example of why naming (short) functions are redundant - seeing as how it's one of the first "complex" functions/operands thaught/named in mathematics, and heavily used to shorten notation for for example combinatorics (that is "n!"). But I think this just reflects on the (for me) somewhat alien culture of array languages - its not wrong, but it is different.