RegEx: Unterschied zwischen den Versionen

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Guide (german): https://t3n.de/news/regex-guide-t3n-552858/
Guide (german): https://t3n.de/news/regex-guide-t3n-552858/
Other guide: https://www.rexegg.com/regex-quickstart.html
Interactive tutorial: https://regexone.com/


== General Rules ==
== General Rules ==

Version vom 28. August 2021, 15:05 Uhr

Notes for RegEx respectively Regular Expressions.

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

Other guide: https://www.rexegg.com/regex-quickstart.html

Interactive tutorial: https://regexone.com/

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 .
Grouping with alternatives Tues)day
Word and text boundaries b ^ $


Multiplier
Multiplier Example
Multiplier {42}, {4,20}
One or more characters +
Zero or one character ?
Zero or more characters *