I wanted to update my comment but for some reason I can't. I mistakenly said Java Koans when I actually meant The Codeless Code, located here http://thecodeless

I wanted to update my comment but for some reason I can't. I mistakenly said Java Koans when I actually meant The Codeless Code, located here http://thecodelesscode.com/contents http://thecodelesscode.com/contents. Sorry about that!