duplicate rows

Νικόλαος Κερασιώτης

i want to find duplicate rows in a large txt file and save them(not delete them). can you help me ?

Scott Sumner

Do you need to keep them in their original order, or can they (the duplicate lines) be sorted by the technique that would allow you to copy only them?

Νικόλαος Κερασιώτης

no it’s not necessary to be in any order

guy038

Hello Νικόλαος Κερασιώτης,

If so, just refer to the post, below :

https://notepad-plus-plus.org/community/topic/12490/i-want-to-keep-only-unique-lines/2

This post shows TWO methods :

A first one which does not keep the original order of the lines
A second one, much longer, but that will keep the original order of the lines

From what you replied to Scott, I suppose that the cases B) or C), in METHOD 1 section should be convenient to you :-))

Best Regards

guy038