Updated Integer#is_fibonacci?

skalnik · Oct 4, 2008 · 314ea6d · 314ea6d
1 parent c9518cf
commit 314ea6d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/euler.rb b/lib/euler.rb
@@ -95,7 +95,7 @@ def is_pandigital?(x)
     #   4.is_fibonacci? # => true
     def is_fibonacci?
       a, b = Math.sqrt((5*(self**2))+4), Math.sqrt((5*(self**2))-4)
-      return true if a.to_i == a or b.to_i == b
+      return true if (a.to_i == a and b.to_i != b) or (a.to_i != a && b.to_i == b)
       return false
     end