1 Regex

fourtf edited this page 2019-08-14 19:55:59 +02:00

Regular expressions (or short regexes) are often used to check if a text matches a certain pattern. For example the regex ab?c would match abc or ac, but not abbc or 123. In Chatterino, you can use them to highlight messages (and more) based on complex conditions.

Basic patterns:

Pattern	Matches
x?	nothing or x
x*	x, repeated any number of times
x+	x, repeated any number of times but at least 1
^	The start of the text
$	The end of the text
x|y	x or y

You can group multiple statements with ():

Pattern	Matches
asd?	asd or as
(asd)?	asd or nothing
\(asd\)	(asd), literally

You can also group multiple characters with []:

Pattern	Matches
[xyz]	x, y or z
[1-5a-f]	1,2,3,4,5,a,b,c,d,e,f
[^abc]	Anything, except a, b and c
[\-]	-, literally (escaped with \)
\[xyz\]	[xyz], literally

Special patterns:

Pattern	Matches
\d	Digit characters (0-9)
\D	Non-digit characters
\w	Word characters (a-zA-Z0-9_)
\W	Non-word characters
\s	Spaces, tabs, etc.
\S	Not spaces, tabs, etc.
\b	Word boundaries (between \w and \W)
\B	Non-word boundaries

You can try out your regex pattern on websites like https://regex101.com/.