Fixed index-of for clojure.

src/main/clojure/lists/ClojureLists.clj

@@ -2,7 +2,6 @@
   (:require [clojure.core])
   (:gen-class))
 
-
 (defn my-sum [& args]
   (reduce + args))
 
@@ -18,14 +17,12 @@
 (defn exists [e elements]
   (> (my-count e elements) 0))
 
-; Currentlu this doesn't work, but should try to figure it out
-;(defn- index-of-with-index
-;  ([e i] (do (println e i) -1))
-;  ([e i x] (do (println e i x) (if (= e x) i -1)))
-;  ([e i x & more] (do (println e i x more) (if (= e x) i (index-of-with-index e (+ i 1) more)))))
-;
-;(defn index-of [e & args]
-;  (index-of-with-index e 0 args))
+(defn- index-of-with-index [e i elements]
+  (if (empty? elements)
+    -1
+    (if (= e (first elements))
+      i
+      (index-of-with-index e (+ 1 i) (rest elements)))))
 
-(defn index-of2 [e & more]
-  (.indexOf more e))
+(defn index-of [e elements]
+  (index-of-with-index e 0 elements))

src/test/clojure/lists/ClojureListsTest.clj

@@ -10,6 +10,14 @@
   (testing "my-max"
     (is (= 3 (my-max 1 2 3)))))
 
+(deftest my-count-found
+  (testing "my-count-found"
+    (is (= 2 (my-count "a" (seq ["a" "a" "b"]))))))
+
+(deftest my-count-not-found
+  (testing "my-count-not-found"
+    (is (= 0 (my-count 4 (seq [1 2 3]))))))
+
 (deftest exists-true
   (testing "exists-true"
     (is (exists "a" (seq ["b" "b" "a"])))))
@@ -20,16 +28,8 @@
 
 (deftest index-of-found
   (testing "index-of-found"
-    (is (= 1 (index-of2 "b" "a" "b")))))
+    (is (= 3 (index-of "d" (seq ["a" "b" "c" "d"]))))))
 
 (deftest index-of-not-found
   (testing "index-of-not-found"
-    (is (= -1 (index-of2 4 1 2 3)))))
-
-(deftest my-count-found
-  (testing "my-count-found"
-    (is (= 2 (my-count "a" (seq ["a" "a" "b"]))))))
-
-(deftest my-count-not-found
-  (testing "my-count-not-found"
-    (is (= 0 (my-count 4 (seq [1 2 3]))))))
+    (is (= -1 (index-of "e" (seq ["a" "b" "c" "d"]))))))