lib/ipaddress/extensions/extensions.rb in ipaddress-0.5.0 vs lib/ipaddress/extensions/extensions.rb in ipaddress-0.6.0

@@ -1,15 +1,21 @@
 class << Math
   def log2(n); log(n) / log(2); end
 end
 
+if RUBY_VERSION =~ /1\.8/
+    class Hash
+        alias :key :index
+    end
+end
+
 class Integer
   def power_of_2?
     Math::log2(self).to_i == Math::log2(self)
   end
 
-  def closest_power_of_2
-    self.upto(32) do |i|
+  def closest_power_of_2(limit=32)
+    self.upto(limit) do |i|
       return i if i.power_of_2?
     end
   end
 end