Regex to match only the first line?

user_1219414 0
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Is it possible to make a regex match only the first line of a text? So if I have the text:

This is the first line.
This is the second line. ...

It would match "This is the first line.", whatever the first line is.

regex
4 Answers

There is also negative lookbehind function (PowerGREP or Perl flavor). It works perfectly for my purposes. Regex:

(?<!\s+)^(.+)$

where

  • (?<!\s+) is negative lookbehind - regex matches only strings that are not preceded by a whitespace(s) (\s also stands for a line break)
  • ^ is start of a string
  • (.+) is a string
  • $ is end of string
user_38447700
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