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This article will explain in detail how notepad++ matches lines or blank lines containing specific characters. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

For example, there are the following characters on a line:

12q34m56

It can be matched with the following rules

^ (. *) 34 (. *) $

Match blank lines with the following rules, one of which must be available. If it doesn't work. You can restart notepad++

^ (\ s*)\ r\ n^ (\ s*)\ n^ (\ s*)\ r\ n

Remove multiline comments

/\ * (. | [\ r\ n]) *?

Match lines that do not contain hehe characters

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