Notepad ++ How to multiply numbers from mass replace?

Question

I'm trying to multiply value in

"StackSize" Value="x"

By 3.

So all Values in x would be three times bigger. How can I do it by using mass replace?

Answer 1

You cannot. Notepad++ does not have the facilities to do arithmetic in its search/replace commands. Tasks like this can be done with programming or scripting languages. For example the Perl substitution s/.../.../e could be used

Quoting from http://perldoc.perl.org/perlop.html:

A /e will cause the replacement portion to be treated as a full-fledged Perl expression and evaluated right then and there

Notepad++ has plugins that provide good support for Python and that may allow you to achieve what you want.

Answer 2

There are no built-in regex-based calculation feature of this kind in Notepad++, but you may leverage the Notepad++ PythonScript plug-in.

Install it and use the following code in the script file:

def multiply_number_in_context(match):
    return "{0}{1}{2}".format(match.group(1), str(float(match.group(2))*3), '"')

editor.rereplace(r'("StackSize" Value=")(\d+)"', multiply_number_in_context)

If you plan to multiply integer values, replace float(match.group(2))*3) with int(match.group(2))*3).