 -    frozen_array = [1,2,3]
 -    frozen_array.freeze
 -    frozen_array
-+    [1,2,3].dup.freeze
++    [1,2,3].freeze
    end
  
    def self.empty_frozen_array
 -    frozen_array = []
 -    frozen_array.freeze
 -    frozen_array
-+    [].dup.freeze
++    [].freeze
    end
  
    def self.recursive_array

-          return true if x == 2
-          raise raise StandardError, 'Oops' if x == 3
+          case x
+          when 3 then raise StandardError, 'Oops'
+          when 2 then true
+          else false
+          end
         end

       end
 
       a.should == [1, 3, 4]
