RegEx: Unterschied zwischen den Versionen

Version vom 28. August 2021, 13:31 Uhr

Notes for RegEx respectively Regular Expressions.

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 ^ $

@@ Zeile 11: / Zeile 11: @@
 | Literal || a b c 1 2 3
 |-
-| Meta character || . [ ] { } ? * + | ( ) ^ $
+| Meta characters || . [[ ] { } ? * + | ( ) ^ $
 |}
@@ Zeile 26: / Zeile 26: @@
 |-
 | Inversion of Character Classes  || D, W, S, [^abc]
+|-
+| Character class range||  [a-c]
 |-
 | Single Character  || .