Yes, you're exactly right about REPL-driven development and TDD being the same spirit. I took to TDD pretty easily because I was already used to doing short ru

Yes, you're exactly right about REPL-driven development and TDD being the same spirit. I took to TDD pretty easily because I was already used to doing short run-it-and-see-if-it-works cycles. The main difference was that instead of checking via eyeball, I talk the computer to check it. This is slightly slower early on, but so much faster once a program is big enough that manually checking everything would take a while.