extract_namespace

# File actionpack/lib/action_controller/polymorphic_routes.rb, line 152
      def extract_namespace(record_or_hash_or_array)
        returning "" do |namespace|
          if record_or_hash_or_array.is_a?(Array)
            record_or_hash_or_array.delete_if do |record_or_namespace|
              if record_or_namespace.is_a?(String) || record_or_namespace.is_a?(Symbol)
                namespace << "#{record_or_namespace}_"
              end
            end
          end  
        end
      end