From: Ramakrishnan Muthukrishnan <vu3rdd@gmail.com>
Date: Tue, 7 Sep 2010 10:56:50 +0000 (+0530)
Subject: an important bug fixed on equal? function
X-Git-Url: https://git.rkrishnan.org/pf/content/en/seg/bcase/install.html?a=commitdiff_plain;h=6e1f44454d46e7e0c48033c27dfa759ccf9ee52f;p=sicp.git

an important bug fixed on equal? function
---

diff --git a/src/sicp/ex2_54.clj b/src/sicp/ex2_54.clj
index 0039c29..3ed52d2 100644
--- a/src/sicp/ex2_54.clj
+++ b/src/sicp/ex2_54.clj
@@ -10,7 +10,8 @@
     (= x y)))
 
 (defn equal? [a b]
-  (cond (empty? a) (empty? b)
+  (cond (and (atom? a) (atom? b)) (eq? a b)
+        (and (not (atom? a)) (not (atom? b))) (and (empty? a) (empty? b)) 
         (atom? (first a))
         (if (eq? (first a) (first b))
           (equal? (rest a) (rest b))