Question

我需要在预定标签和不确定标签之间匹配文本块中的回车符。

在这种情况下，边界标签为：

预定：X-Gmail-Labels:

不确定：(?:^[\w\-]+:)，例如：Delivered-To:或ABC123:

感谢WiktorStribiżew对this thread的回答，我对应该采取的解决方案有一个大概的了解。

我不确定如何应用我认为需要的东西：边界不确定标签的未捕获超前组。

简单地说，我想删除与X-Gmail-Labels:相关的文本中的所有回车符。如果可以匹配它们，就可以删除它们！

初始尝试的正则表达式：

(?:\bX-Gmail-Labels:|(?!^)\G)[^\r]*\K\r

样本数据：

From 1604610346950104244@xxx Fri Jun 29 12:34:35 +0000 2018
X-GM-THRID: 1604610346950104244
X-Gmail-Labels: Archived thing,Unread
Delivered-To: joe.schmoe@gmail.com
Received: by 2002:a9f:3005:0:0:0:0:0 with SMTP id h5-v6csp731836uab;
        Fri, 29 Jun 2018 05:34:36 -0700 (PDT)
From 1604610346950104244@xxx Fri Jun 29 12:34:35 +0000 2018
X-GM-THRID: 1604610346950104244
X-Gmail-Labels: Also Archived 
Day-of-week: Tuesday
Received: by 2002:a9f:3005:0:0:0:0:0 with SMTP id h5-v6csp731836uab;
        Fri, 29 Jun 2018 05:34:36 -0700 (PDT)
From 1604610346950104244@xxx Fri Jun 29 12:34:35 +0000 2018
X-GM-THRID: 1604610346950104244
X-Gmail-Labels: Archived 
thing,
Unread
Favorite-fruit: bananas
Received: by 2002:a9f:3005:0:0:0:0:0 with SMTP id h5-v6csp731836uab;
        Fri, 29 Jun 2018 05:34:36 -0700 (PDT)
From 1604610346950104244@xxx Fri Jun 29 12:34:35 +0000 2018
X-GM-THRID: 1604610346950104244
X-Gmail-Labels: Archived 
 ,Read
ABC123: DoReMe
Received: by 2002:a9f:3005:0:0:0:0:0 with SMTP id h5-v6csp731836uab;
        Fri, 29 Jun 2018 05:34:36 -0700 (PDT)
From 1604610346950104244@xxx Fri Jun 29 12:34:35 +0000 2018
X-GM-THRID: 1604610346950104244
X-Gmail-Labels: Archived 
thing,Unread
emais
Received: by 2002:a9f:3005:0:0:0:0:0 with SMTP id h5-v6csp731836uab;
        Fri, 29 Jun 2018 05:34:36 -0700 (PDT)

(?:^[\w\-]+:)

正则表达式applied to data上方显示不确定的标记模式。

(?:\bX-Gmail-Labels:\G)[^\r]*\K\r

正则表达式applied to data上方显示无限制的匹配项。

谢谢！ -菲茨

正则表达式：有界组中的匹配

0 个答案: