23. Regular Expressions

This page is a reference guide of the regular expression commands and escaped characters.

Each character matches itself, unless it is one of the special characters +?.*^$(){[|\. The special meaning of these characters can be escaped by using a \.

------+---- . | Matches any character but now new line. ------+---- (...) | Groups a series of pattern elements into a single | element. The text the groups matches is captured for | later use. ------+---- ^ | Matches the beginning of a line. ------+---- $ | Matches the end of the line. ------+---- [...] | Denotes a class of characters to match ------+---- [^..] | Negates a class of characters to match ------+---- ...| | Matches the alternatives from left to right until | one succeeds ------+----

See also:

See section 19. Search And Replace.
See section 21. Find/Replace In Files.