Notepad++: How to remove a section of text with regex

Question

I have a file that has lines like:

string1,string2,string3

I would like it to just be

string2

How would I use regular expression to do this?

Answer 1

Assuming you have strictly 3 columns, and strings do not contain comas ( , ) and are separated by comas ( , ), then:

find:

(.+),(.+),(.+)

replace

\2