Clojure function destructuring

clj_function_destructuring.clj

; function destructuring
(defn eat-pizza-picky-style
  ; for eating only the good stuff from a pizza
  [{:keys [dough meat sauce]}]
  (println (str 
                "For this pizza, Whiskers only eats the " 
                dough ", " meat ", and " sauce 
                ". It picks everything else off!")))

(def pepperoni-pizza {
  :cheese "mozzarella"
  :dough "white flour dough"
  :meat "pepperoni"
  :sauce "canned tomato sauce"
  :veggies "peppers"
})

(def healthier-pizza {
  :dough "whole grain dough"
  :meat "chicken"
  :sauce "alfredo sauce"
  :veggies "peppers"
  :cheese "swiss"
})

(def northwest-pizza {
  :dough "sourdough"
  :meat "salmon"
  :sauce "dijon mustard"
  :veggies "peppers"
  :seasoning "dill"
})

(eat-pizza-picky-style pepperoni-pizza) 
;=> For this pizza, Whiskers only eats the white flour dough, 
;=> canned tomato sauce, and pepperoni. It picks everything else off!

(eat-pizza-picky-style healthier-pizza) 
;=> For this pizza, Whiskers only eats the whole grain dough, 
;=> alfredo sauce, and chicken. It picks everything else off!

(eat-pizza-picky-style northwest-pizza) 
;=> For this pizza, Whiskers only eats the sourdough, dijon mustard,
;=> and salmon. It picks everything else off!