Regex
From DWIKI
Regular expressions
Links
- Regex reference
- http://gnosis.cx/publish/programming/regular_expressions.html
- http://www.zytrax.com/tech/web/regex.htm
- http://www.regular-expressions.info
- https://regex101.com/
Syntax
(?:)
Non-capturing group, so creating a back-reference
Tools
- txt2regex
ZZ
pcre
FAQ
Match IP address
'\d{1,3}[-x.]\d{1,3}[-x.]\d{1,3}'
Replace one or more spaces
's/\s\s*/FOO/g'
