gistfile1.clj

(defmacro simple-let
  [bindings & body]
  `((fn ~(->> (partition-all 2 bindings) (map first) (vec))
     ~@body)
    ~@(->> (partition-all 2 bindings) (map second))))

(simple-let [x true]
  (= false x))
;; returns false, because x is bound to true

;; what's cool is how the author points out that let is actually a type of lambda expression (anonymous function)
;; so this macro i wrote illustrates that explicitly by macroexpanding the let form into a lambda form

;; we can verify that this macro works correctly by macroexpanding the quoted form (we quote so that the reader 
;; treats the form as a list of code, and not a list to be evaluated)

(macroexpand 
  '(simple-let [x true]
    (= false x)))

;; returns

((clojure.core/fn [x] (= false x)) true)