This is another Ruby tutorial that attempts to teach ruby via test driven development.
Learn Ruby with EdgeCase Ruby Koans

I don't believe I could have learned a language this way, but maybe others can.

Thanks for the post

This does seem like it expects you to already understand general programming fundamentals, and it jumps you into relatively advanced stuff without explaining the basics. So I don't think I could have learned with this as an absolute beginner, although I think there is a ton of value in practicing test driven development. So it may be worth a look even for someone who knows how to program, or even ruby, but wants to learn more about writing tests.

What are the ruby lessons in JohnnyStar's signature like? Are they a better means of learning ruby?

edit: nvm, after reading them both, I much prefer Johnny's lessons… just wish there were more of them! :P