Regex

Online testers

• regexr.com

Get block between two “tags”

1

\[start_ignore\][\s\S]*?(?:\[end_ignore\].*)

Multiline modifier

/s

1

/(.*)<FooBar>/s

Positive lookahead

• https://www.regular-expressions.info/lookaround.html

Games

• regexcrossword.com - Regex Crossword is a crossword puzzle game, where the crossword clues are defined using regular expressions.

Links

• javascript regexp
• python regex