RegEx string to find two strings and delete the rest of the text in the file

Question

I need to do a find and delete the rest in a text file with notepad+++ i want tu use RegeX to find variations on thban..... the variable always has max 5 chars behind it(see dot

Answer 1

You may use

Find What:      (?|\b(thban\S{0,5})|\s(C3\w+))|(?s:.)
Replace With: (?1$1\n:)

Screenshot & settings

Details

• (?| - start of a branch reset group:
  • \b(thban\S{0,5}) - Group 1: a word boundary, then thban and any 0 to 5 non-whitespace chars
  • | - or
  • \s(C3\w+) - a whitespace char, and then Group 1: C3 and one or more word chars
• ) - end of the branch reset group
• | - or
• (?s:.) - any one char (including line break chars)

The replacement is

• (?1 - if Group 1 matched,
  • $1\n - Group 1 value with a newline
  • : - else, replace with empty string
• ) - end of the conditional replacement pattern