QuickReference.md

Regex Quick Reference

Element	Description	Example Pattern	Matching String	Non-matching String
x	Literal character - exact match of most non-special characters	abc	abc	xyz
.	Any character	a.c.e	axcye	abbbcde
\w	'Word characters' - alphanumeric or underscore	ab\w	abz	ab:
\d	Any digit 0-9	abc12\d	abc129	abc12z
\D	Any non-digit	abc12\D	abc12z	abc123
\s	Most whitespace (tab, space, newline, etc.)	hi\smum	hi mum	himum
+	One or more of the previous character	x+yz	xxxxxyz	yz
*	Zero or more of the previous character	x*yz	yz	abc
{n}	Previous character exactly n times	x{3}yz	xxxyz	xxyz
[xyz]	One of the characters in the list	[abc]99	b99	d99
^	Start of string	^abc	abc123	123abc
$	End of string	abc$	123abc	abc123

Notes

Normally the match can occur anywhere in the string.

Matching is usually case-sensitive.

To escape a special character, use backslash.