parse_request_parameters

# File actionpack/lib/action_controller/request.rb, line 435
      def parse_request_parameters(params)
        parser = UrlEncodedPairParser.new

        params = params.dup
        until params.empty?
          for key, value in params
            if key.blank?
              params.delete key
            elsif !key.include?('[')
              # much faster to test for the most common case first (GET)
              # and avoid the call to build_deep_hash
              parser.result[key] = get_typed_value(value[0])
              params.delete key
            elsif value.is_a?(Array)
              parser.parse(key, get_typed_value(value.shift))
              params.delete key if value.empty?
            else
              raise TypeError, "Expected array, found #{value.inspect}"
            end
          end
        end

        parser.result
      end