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February 28, 2023 21:36
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. - Any Character Except New Line | |
\d - Digit (0-9) | |
\D - Not a Digit (0-9) | |
\w - Word Character (a-z, A-Z, 0-9, _) | |
\W - Not a Word Character | |
\s - Whitespace (space, tab, newline) | |
\S - Not Whitespace (space, tab, newline) | |
# Anchors | |
\b - Word Boundary | |
\B - Not a Word Boundary | |
^ - Beginning of a String | |
$ - End of a String | |
[] - Matches Characters in brackets | |
[^ ] - Matches Characters NOT in brackets | |
| - Either Or | |
( ) - Group | |
\1 - Reference | |
(?:) - Non-Capturing Group | |
(?|(regex1)|(regex2)) - Branch Reset Groups | |
(?=) - Positive Lookahead | |
(?!) - Negative Lookahead | |
(?<=) - Positive Lookbehind | |
(?<!) - Negative Lookbehind | |
Quantifiers: | |
* - 0 or More | |
+ - 1 or More | |
? - 0 or One(Optional) | |
{3} - Exact Number | |
{3,4} - Range of Numbers (Minimum, Maximum) | |
Flags: | |
g - Global | |
m - Multiline | |
i - Ignore case |
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