(defn greet-me [] (print "hey programmer!")) (defn greet-stranger [] (print "hey stranger!")) (varfn greet [] (greet-me)) (greet) # prints "hey programmer!" (varfn greet [] (greet-stranger)) (greet) # prints "hey stranger!" # kind of analogous to (def greet (fn [] (some-thunk))), but with built-in # sugar to automatically update 'greet' if varfn is called with a name # already bound