gistfile1.txt

(defn foo []
  (if check
    return-value)
  (extra-thingy-1 param1 param2)
  (extra-thingy-2 param1 param2))

;; extra-thingies will always be evaluated, regardless of check
;; return value of the function will be extra-thingy-2

(defn foo []
  (if check
    return-value
    (do (extra-thingy-1 param1 param2)
        (extra-thingy-2 param1 param2)))

;; extra-thingies will only be evaluated when check fails
;; return value of function will be either return-value or extra-thingy-2, depending on the check