Your application is live but it isn't quite behaving the way you expect - what do you do? You'd like to instrument the code, you'd like to be able to run parts of your production code in the live environment and look at the output, you might even like to replace functions with updated code. How can you do that? With most languages, this would be very difficult. Lisp languages tend to make this possible and Clojure makes this possible on the JVM. You can run Clojure on Heroku and they've recentl[...]