[fileExt](%E5%AD%97%E7%AC%A6%E4%B8%B2/fileExt.md) [fileNameExt](%E5%AD%97%E7%AC%A6%E4%B8%B2/fileNameExt.md) [currTimestamp](%E5%AD%97%E7%AC%A6%E4%B8%B2/currTimestamp.md) [currDatetime](%E5%AD%97%E7%AC%A6%E4%B8%B2/currDatetime.md) [timestampFormat](%E5%AD%97%E7%AC%A6%E4%B8%B2/timestampFormat.md)