# File class/command.rb, line 11
        def fdate(files, date = 0, msg = '(new)')
                flist = getFileList(files)
                times = flist.collect{|x| File.mtime(x) }
                raise "ファイルがありません" if times.empty?
                time = times.max      # 一番更新日が新しいものを選ぶ
                str = time.strftime('%Y/%m/%d')
                str << msg if (Time.now - time) < (24 * 60 * 60 * date)
                str
        end