RegEx

Notes for RegEx respectively Regular Expressions.

Guide (german): https://t3n.de/news/regex-guide-t3n-552858/

General Rules

Character Types

Type	Example
Literal	a b c 1 2 3
Meta character	( ) ^ $

Meaning of meta characters

Meaning	Example
Character class digit	d
Character class character	w
Character class whitespace	s
Inversion of Character Classes	D, W, S, [^abc]
Single Character	.
Multiplier	{42}, {4,20}
One or multiple characters	+
Zero or one character	?
Zero or multiple characters	*
Grouping with alternatives	Tues)day
Word and text boundaries	b ^ $