added approx-equal function

diff --git a/src/sicp/utils.clj b/src/sicp/utils.clj
index f5c3e9c6f04397a2466d1b7dc9760ad1d41e4ed1..258ac6080cb2b19e170c13cb04fcc4da42f48e24 100644 (file)
--- a/src/sicp/utils.clj
+++ b/src/sicp/utils.clj
@@ -39,6 +39,9 @@
   (/ (reduce + coll)
      (float (count coll))))
 
+(defn approx-equal [x y]
+  (< (abs (- x y)) 0.00001))
+
 (defmacro microbench
   " Evaluates the expression n number of times, returning the average
     time spent in computation, removing highest and lowest values.