Thanks much for the feedback. I clearly didn't understand them as well as I thought I did, though after reading http://stackoverflow.com/a/3085516/337184 http:/

Thanks much for the feedback. I clearly didn't understand them as well as I thought I did, though after reading http://stackoverflow.com/a/3085516/337184 http://stackoverflow.com/a/3085516/337184 I think I understand a bit more. I'll update the post with a correction, and eventually write a "how I learned to stop worrying and love the difference between foldl and foldr" post. :-)