RegEx

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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 ^ $