Delete all content but keeping matched

by

You may use the following regex:

(?i-s)[0-9]([a-z])|.

Replace with (?{1}$1:).

To delete all but non-matched, use the (?{1}$0:) replacement with the same regex.

Details:

  • (?i-s) – an inline modifier turning on case insensitive mode and turning off the DOTALL mode (. does not match a newline)
  • [0-9]([a-z]) – an ASCII digit and any ASCII letter captured into Group 1 (later referred to with $1 or \1 backreference from the string replacement pattern)
  • | – or
  • . – any char but a line break char.

Replacement details

  • (?{1} – start of the conditional replacement: if Group 1 matched then…
    • $1 – the contents of Group 1 (or the whole match if $0 backreference is used)
    • : – else… nothing
  • ) – end of the conditional replacement pattern.

enter image description here

More Related Contents:

  1. How to use conditionals when replacing in Notepad++ via regex
  2. Find CRLF in Notepad++
  3. Regex: Remove lines containing “help”, etc
  4. Notepad++ incrementally replace
  5. Is it possible to define a pattern and reuse it to capture multiple groups?
  6. How to replace all strings to numbers contained in each string in Notepad++?
  7. Notepad++ Find/Replace number with Increment Value
  8. Removing empty lines in Notepad++
  9. How do I remove all non-ASCII characters with regex and Notepad++?
  10. Using RegEX To Prefix And Append In Notepad++
  11. notepad++ Inverse Regex replace (all but string)
  12. Replace with whole match value using Notepad++ regex search and replace
  13. While replacing using regex, How to keep a part of matched string?
  14. Remove everything except a certain pattern
  15. How to replace only part of found text?
  16. How to extract all Yahoo emails from a .CSV file?
  17. Regular expression to remove fancy apostrophe [closed]
  18. Regular Expression for ” – ” and characters after [closed]
  19. What is a word boundary in regex?
  20. How can I use ‘Not Like’ operator in MongoDB
  21. Zero-Length regexes and infinite matches?
  22. Regex pattern for HH:MM:SS time string
  23. Comma Separated Numbers Regex
  24. Fully qualified domain name validation
  25. Fixing Catastrophic Backtracking in Regular Expression
  26. apache HTTP:X-Forwarded-Proto in .htaccess is causing redirect loop in dev environment
  27. Dollar sign in regular expression and new line character
  28. What do \S, \W, \D stand for in regex?
  29. How to match the first word after an expression with regex?
  30. When is it best to use Regular Expressions over basic string splitting / substring’ing?

Leave a Comment