RegEx

Notes for RegEx respectively Regular Expressions.

General Rules

Character Types
Type	Example
Literal	a b c 1 2 3
Meta characters	. [[ ] { } ? * + \| ( ) ^ $

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]
Character class range	[a-c]
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 ^ $