solution to 2.17

diff --git a/src/sicp/ex2_17.clj b/src/sicp/ex2_17.clj
new file mode 100644 (file)
index 0000000..f58468d
--- /dev/null
+++ b/src/sicp/ex2_17.clj
@@ -0,0 +1,13 @@
+(ns sicp.ex2_17
+  (:use [sicp utils ch2_2]
+       [clojure test]))
+
+(defn last-pair [lst]
+  (if (= (length lst) 1)
+    lst
+    (last-pair (rest lst))))
+
+(deftest test-last-pair-1
+  (are [x y] [= x y]
+       (last-pair (list 1 2 3 4)) (list 4)
+       (last-pair (list 23 72 149 34)) (list 34)))
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