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Asked: 2026-05-27T08:13:54+00:00

Okay, so Im trying to replace a line like this 00010 (0x000A) with something

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Okay, so Im trying to replace a line like this

00010 (0x000A)

with something like:

0010 (0x000A)

Basically just removing the first 0 from a string of 5 numbers. The file is about 134k lines. So I just want to remove the first 0 from a line of 5 numbers in length, to make the final string 4 numbers.

I’ve been reading on the find function in Notepad++ using regular expressions, but for the life of me, I really cannot wrap my head around how it functions. Very confusing stuff.

So an answer would be great—an answer with some explanation would be fantastic!

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1 Answer

  1. Editorial Team

    I don’t have Notepad++ on this machine so can’t test right now, but this regex should work.

    Find: ^[0-9]([0-9]{4})$

    Replace: \1

    Breaking that down, it matches the start of the string, followed by a character in the range 0-9, followed by four more of those characters, capturing them, then the end of the string, and replaces it with the first capture group.

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