Notepad++ Regular Expression add up numbers

Question

How do I sum or add a certain value to all those numbers? For example my goal is to increase all those numbers inside the \"\" with 100 but achieving that has been problemat

Answer 1

That's not possible with the sole use of regular expressions in Notepad++. Unfortunately there's no way to perform calculations in the replacement pattern.

So the only way of accomplishing your task in Notepad++ is with the use of the Python Script plugin.

1. Install Python Script plugin from the Plugin Manager or from the official website.

2. Then go to Plugins > Python Script > New Script. Choose a filename for your new file (eg add_numbers.py) and copy the code that follows:

   def calculate(match):
       return 'devio%s="%s"' % (match.group(1), str(int(match.group(2))+100))
   
   editor.rereplace('devio([0-9])="([0-9]+)"', calculate)
   

3. Run Plugins > Python Script > Scripts > add_numbers.py and your text will be transformed to:

   <devio1="975" devio2="7879" devio3="5735" devio4="254"/>
   <devio1="865" devio2="74879" devio3="31635" devio4="644"/>
   <devio1="4435" devio2="113" devio3="55735" devio4="1665"/>
   

Answer 2

I'm not really familiar with notepad++ but for an algorithm, supposing you have a number abcd = a*1000 +b*100 + c*10 + d, then so long as b is in [0,8] you can just replace b by b+1. As for when b = 9 then you need to replace b with 0 and replace a with a+1 (and if a = 9 then you'd replace a by 10).

Noting this, you could then, for three and four digit numbers, say, apply the following regexes:

\([1-9]+\)0\([0-9]{2}\) -> \1 1\2, 
\([1-9]+\)1\([0,9]{2}\) -> \1 2\2, 
... -> , 
\([1-9]+\)8\([0-9]{2}\) -> \1 9\2, 

and so on ... Noting that you also have to consider any a=9, b=9 integers, and larger integers; this suggests some sort of iteration with if statements covering the cases where the coefficients of 10^x (x>=2) are equal to 9. When you start actually coding this (or doing it by hand) you will begin to realize that doing this with a pure regex approach is going to be painful.

Answer 3

Regex doesn't support arithmentic and Notepad++ doesn't support any computation beyond regex, so you're stuck if you're limiting yourself to that tool. There are, of course, many other non-Notepad++ solutions, some of which are discussed in Math operations in regex.