diff --git a/enumerable.rb b/enumerable.rb
index b0e6a1b..d653dbd 100644
--- a/enumerable.rb
+++ b/enumerable.rb
@@ -2,4 +2,24 @@ module Enumerable
   def mean
     sum / size
   end
+
+  # returns a new hash/array
+  # keeps object references in tact
+  # symbolize a hash recursivly
+  # if we encounter an array, we will also call symbolize for every hash or array found
+  def symbolize_keys_rec
+    if is_a?(Hash)
+      inject({}) do |options, (key, value)|
+        options[(key.to_sym rescue key) || key] = (value.is_a?(Hash)||value.is_a?(Array)) ? value.symbolize_keys_rec : value
+        options
+      end
+    elsif is_a?(Array)
+      inject([]) do |options, value|
+        options << ((value.is_a?(Hash)||value.is_a?(Array)) ? value.symbolize_keys_rec : value)
+        options
+      end
+    else
+      raise Exception.new("Can't do that!")
+    end
+  end
 end
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