add tasks starting with a number

Task/100-doors/Clojure/100-doors-1.clj

@@ -0,0 +1,13 @@
+(defn doors []
+  (let [doors (into-array (repeat 100 false))]
+    (doseq [pass   (range 1 101)
+            i      (range (dec pass) 100 pass) ]
+      (aset doors i (not (aget doors i))))
+    doors))
+
+(defn open-doors [] (for [[d n] (map vector (doors) (iterate inc 1)) :when d] n))
+
+(defn print-open-doors []
+  (println
+    "Open doors after 100 passes:"
+    (apply str (interpose ", " (open-doors)))))

Task/100-doors/Clojure/100-doors-2.clj

@@ -0,0 +1,13 @@
+(defn doors []
+  (reduce (fn [doors toggle-idx] (update-in doors [toggle-idx] not))
+          (into [] (repeat 100 false))
+          (for [pass   (range 1 101)
+                i      (range (dec pass) 100 pass) ]
+            i)))
+
+(defn open-doors [] (for [[d n] (map vector (doors) (iterate inc 1)) :when d] n))
+
+(defn print-open-doors []
+  (println
+    "Open doors after 100 passes:"
+    (apply str (interpose ", " (open-doors)))))

Task/100-doors/Clojure/100-doors-3.clj

@@ -0,0 +1,11 @@
+(defn doors []
+	(reduce (fn [doors idx] (assoc doors idx true))
+	        (into [] (repeat 100 false))
+	        (map #(dec (* % %)) (range 1 11))))
+
+(defn open-doors [] (for [[d n] (map vector (doors) (iterate inc 1)) :when d] n))
+
+(defn print-open-doors []
+  (println
+    "Open doors after 100 passes:"
+    (apply str (interpose ", " (open-doors)))))