For something like a personal recommendation system, machine learning type of stuff on a website, what language would be best?
I happen to know a world-class expert in machine learning. He likes Prolog, especially for the higher level logic of the system. Hadn't even heard anyone mention that in a long time. Personally, I like Java. But if you're going to do intensive machine learning, you should be concerned about the speed of math processing. C++ for the math, in my view.
Interested in Collective Programming for the web -- Ruby or Python or PHP?