gistfile1.clj

(defmacro ?
  "A useful debugging tool when you can't figure out what's going on:
  wrap a form with ?, and the form will be printed alongside
  its result. The result will still be passed along."
  [val]
  `(let [x# ~val]
     (prn '~val '~'is x#)
     x#))

Right. And I also tend to rewrite such a little function, since it's even easier than trying to remember in what clojure contrib it lives, grab the dependency if I don't have it yet ... such a little function could maybe have its place somewhere in clojure core ? clojure.core, or clojure.repl ?