Can’t say I 100% understood

I might say things differently from Guy – does it help any with understanding?:

• Instead of non-null text I would say “one or more characters”.

• Instead of Any regex . symbol refer to a single standard character ( Not EOL ones ) I would say “any . in the expression can match any character except line-ending characters (carriage return or linefeed)”

• Instead of Any search is sensible to case : modifier -i ( not insensible ! ) I would say “-i means to not (from the minus) ignore (from the i) case of the characters, thus case (of the e) is relevant”

I don’t know if helps, but it is another way of saying these things.

You’re right about wanting a full insight of the solution. Hopefully, this regex is not very difficult to understand :

• The ^0$ part searches for a single 0 between beginning of line ( ^ ) and end ( $ ) of current line

• The ^.+e-.+ part searches, from beginning of line ( ^ ), for any non-null text, followed with the string e- , with this exact case, and followed with any non-null text ,again, till the end of line

• At beginning, the part (?-is) part are in-line modifiers which mean :

  • Any regex . symbol refer to a single standard character ( Not EOL ones ) : modifier -s

  • Any search is sensible to case : modifier -i ( not insensible ! )

For further learning about regexes, see :

• The official N++ documentation : https://npp-user-manual.org/docs/searching/#regular-expressions

• The Regex FAQ : https://community.notepad-plus-plus.org/topic/15765/faq-desk-where-to-find-regular-expressions-regex-documentation

Best Regards,

guy038

• Open the Replace dialog ( Ctrl + H )

  • SEARCH (?-is)^0$|^.+e-.+

  • REPLACE 0.000

  • Tick the Wrap around option

  • Select the Regular expression search mode

  • Click once, on the Replace All button

• Close the Replace dialog ( ESC )

Voila !

In order to verify, you may use, first, the Replace button, a few times, before clicking on the Replace All button !

Best Regards,

guy038