I've been working on it (prof. Erlang programmer) via Racket. I'm only on section 2.3 and I've gone through section 1's exercises several times. You really gain

I've been working on it (prof. Erlang programmer) via Racket. I'm only on section 2.3 and I've gone through section 1's exercises several times. You really gain an appreciation for math to controlling flow as opposed to something being "null" or matching a certain condition. It's good stuff once it starts to click. Painful, but I think it will pay off in the long run. I've only been at it part-time for 5 weeks!