Contents

(ns allergies)

(def ^:private allergens
  [:eggs :peanuts :shellfish :strawberries :tomatoes :chocolate :pollen :cats])

(defn- flagged?
  [flags index]
  (-> (bit-shift-right flags index)
      (bit-and 1)
      (pos?)))

(defn allergies
  "Given an 8-bit bitmap of flags, return the list of matching allergens."
  [flags]
  (keep-indexed (fn [index allergen]
                  (when (flagged? flags index)
                    allergen))
                allergens))

(defn allergic-to?
  "Given an 8-bit bitmap of flags and an allergen, return a boolean
  indicating whether or not the patient is allergic to the given allergen."
  [flags allergen]
  (some #{allergen} (allergies flags)))

Version data entries

396 entries across 396 versions & 1 rubygems

Version	Path
trackler-2.2.1.139	tracks/clojure/exercises/allergies/src/example.clj
trackler-2.2.1.138	tracks/clojure/exercises/allergies/src/example.clj
trackler-2.2.1.137	tracks/clojure/exercises/allergies/src/example.clj
trackler-2.2.1.136	tracks/clojure/exercises/allergies/src/example.clj
trackler-2.2.1.135	tracks/clojure/exercises/allergies/src/example.clj
trackler-2.2.1.134	tracks/clojure/exercises/allergies/src/example.clj
trackler-2.2.1.133	tracks/clojure/exercises/allergies/src/example.clj
trackler-2.2.1.132	tracks/clojure/exercises/allergies/src/example.clj
trackler-2.2.1.131	tracks/clojure/exercises/allergies/src/example.clj
trackler-2.2.1.130	tracks/clojure/exercises/allergies/src/example.clj
trackler-2.2.1.129	tracks/clojure/exercises/allergies/src/example.clj
trackler-2.2.1.128	tracks/clojure/exercises/allergies/src/example.clj
trackler-2.2.1.127	tracks/clojure/exercises/allergies/src/example.clj
trackler-2.2.1.126	tracks/clojure/exercises/allergies/src/example.clj
trackler-2.2.1.125	tracks/clojure/exercises/allergies/src/example.clj
trackler-2.2.1.124	tracks/clojure/exercises/allergies/src/example.clj
trackler-2.2.1.123	tracks/clojure/exercises/allergies/src/example.clj
trackler-2.2.1.122	tracks/clojure/exercises/allergies/src/example.clj
trackler-2.2.1.121	tracks/clojure/exercises/allergies/src/example.clj
trackler-2.2.1.120	tracks/clojure/exercises/allergies/src/example.clj