Regular expressions in Notepad++

Andrew Buldyzhov November 28, 2018

There are many useful articles about Regular expressions in Notepad++ in the Internet. I have decided to keep my own as a kind of my personal cheat-sheet.

Removing attachments in Thunderbird files

Find: (Content-Transfer-Encoding: base64)(.*?)(\r\n--)
Replace: \1\3
. matches newlines

Convert list of named values into table

This regular expression extracts values from a list of named values and puts them in table columns. New table row starts with Delimiter:

NameOfValue1: NumberValue1
NameOfValue2: TextValue2
NameOfValue3 = URLvalue3
Delimiter ********
NameOfValue1: NumberValue4
NameOfValue2: TextValue5
NameOfValue3 = URLvalue6
Delimiter ********

The resulting table looks like this:
NumberValue1 \t TextValue2 \t URLvalue3
NumberValue4 \t TextValue5 \t URLvalue6

(NameOfValue1: )(\d+)(.*?)(NameOfValue2: )([[:alnum:][:punct:]]+)(.*?)(NameOfValue3 = )([[:alnum:][:punct:]]+)(.*?)(Delimiter\s\*{8})
. matches new line


Alex says:

Specified regular expression depends on the environment where it supposed to be use and additional commands such as : “:alnum:”, “:punct:” need to be modified or replaced. There is simpler way to do it:

drewbul says:

Thank you for the reply, Alex.
When I make the replacement in Notepad++ using your regular expression (and \2\t\5\t\8 as the replacement value), I get this result:

NameOfValue2: TextValue3
Some Useless

… which is different from the desired. So it does depend on the environment. For me Notepad++ is the most convenient place to make such replacements.

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