It says it contains an evolution simulator? Oddly enough, I was thinking of something like this as a project to learn Clojure. Anyone know what that section of the book was like?
It's an implementation of Dewdney's classic article "Simulated evolution: wherein bugs learn to hunt bacteria"
What's cool is that it lends itself to a very pithy implementation in Lisp that runs right in the REPL, with ASCII graphics.