Emacs auto-minor-mode based on extension

Question

I found this question somewhat on the topic, but is there a way [in emacs] to set a minor mode (or a list thereof) based on extension? For example, it\'s pretty easy to

Answer 1

The answer by Trey Jackson seems to be a very robust and extensible solution, but I was looking for something simpler. The following code will enable the fictional hmmm-mode when editing .hmmm files:

(add-hook 'find-file-hook
          (lambda ()
            (when (string= (file-name-extension buffer-file-name) "hmmm")
              (hmmm-mode +1))))