Fundamental-SCs

regex.txt

.               - 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 a Whitespace (space, tab, newline)

\b              - Word Boundary (it is a word)
\B              - Not a Word Boundary (it is part of a word)
^               - Beginning of a String
$               - End of a String

[]              - Matches Characters in brackets
[^ ]            - Matches Characters NOT in brackets
|               - Either Or
( )             - Group

Quantifiers:
*               - 0 or More
+               - 1 or More
?               - 0 or One (the preceding character is optional, but not consecutive)
{3}             - Exact Number
{3,4}           - Range of numbers (Minimum, Maximum)

MetaCharacters (Need to be escaped):
. ^ $ * + ? { } [ ] \ | ( )

Additional Special Characters:
\:              - Matches a literal colon (needs to be escaped)*
\;              - Matches a literal semicolon (needs to be escaped)*
\-              - Matches a literal hyphen (needs to be escaped)*
\(              - Matches a literal opening parenthesis (needs to be escaped)*
\)              - Matches a literal closing parenthesis (needs to be escaped)*

*Remember that when you want to match these characters literally, you need to escape them using a backslash (\).