Regex lookahead more than one element

Is it possible to use a lookahead to establish whether one or more characters does/doesn't exist when those characters do not *immediately* follow the lookahead assertion? e.g. Given regex similar to this: ([abc])([def])([ghi]) could I, say, only allow the 'i' in the third group as a match if there was an 'a' in the first group?
It seems to me what you really want is look-behind, not look-ahead. Are you using pcre/perl RE?

以上就是Regex lookahead more than one element的详细内容,更多请关注web前端其它相关文章!

赞(0) 打赏
未经允许不得转载:web前端首页 » JavaScript 答疑

评论 抢沙发

  • 昵称 (必填)
  • 邮箱 (必填)
  • 网址

前端开发相关广告投放 更专业 更精准

联系我们

觉得文章有用就打赏一下文章作者

支付宝扫一扫打赏

微信扫一扫打赏