# File lib_doc/rucy/lang.rb, line 54
    def select(lang_ranges)
      lang_range_list = LanguageSelector.parse_accept_lang(lang_ranges)
      lang_range_map = Hash.new
      for lang_info in lang_range_list
        lang_range = lang_info[:language]
        next if (lang_range == '*')
        lang_range += '-' + lang_info[:country] if lang_info[:country]
        lang_range_map[lang_range] = lang_info
      end

      for lang_info in lang_range_list
        lang_range = lang_info[:language]
        if (lang_range == '*') then
          for lang_range2 in @lang_list
            unless (lang_range_map.include? lang_range2) then
              return lang_range2
            end
          end
        else
          lang_range += '-' + lang_info[:country] if lang_info[:country]
          if (@lang_set[lang_range]) then
            return lang_range
          end
        end
      end

      nil
    end