Regular Expression(正規表現) Part16

[81 デフォルトの名無しさん 2021/12/21(火) 12:48:39.34 ID:YqPiCVQe]

(?<![.\d])(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.\g'1'){3}(?![.\d])