regex - Positive lookbehind with an optional character - Stack Overflow
Software Carpentry:
Python Regex Fullmatch – Be on the Right Side of Change
An introduction to regular expressions – O'Reilly
Solved: Regex Optional Group - Alteryx Community
The Secret Guide To Regex Optional Group - Python Pool
How Do I Make RegEx Optional? Specify Optional Pattern in Regular Expressions
c# - Regex for end before optional "--" or \s - Stack Overflow
Best Excel Tutorial - Regular Expression in Excel Vba
python - Match regex string, but also return optional leading whitespace - Stack Overflow
Regex optional alternative search - Stack Overflow
Python: Matches a word at the end of a string, with optional punctuation - w3resource
How Do I Make RegEx Optional? Specify Optional Pattern in Regular Expressions
Excel Regex: match strings using regular expressions
RegEx - Extracting the first N words - The Information Lab
Regex does not match last optional group - Stack Overflow
How Do I Make RegEx Optional? Specify Optional Pattern in Regular Expressions
Chris Achard on Twitter: "3/10 Add optional flags to the end of a regex to modify how the matcher works. In JavaScript, these flags are: i = case insensitive m = multi
How to make [ ] as optional in regex - Activities - UiPath Community Forum
Demystifying Regular Expressions in R | R-bloggers
python - Match regex string, but also return optional leading whitespace - Stack Overflow
How Do I Make RegEx Optional? Specify Optional Pattern in Regular Expressions
regex searching for optional strings
Google Analytics 4 Regex (Regular Expressions) Tutorial - Optimize Smart
Regex to extract strings in Excel (one or all matches)
regex searching for optional strings
How to make [ ] as optional in regex - Activities - UiPath Community Forum