I needed this functionality recently and thought it could be done easily with regex. Google led me to http://www.regular-expressions.info/duplicatelines.html which said to sort the lines, and then search for the following:



and replace with:



Unfortunately, I couldn't get this to work in EmEditor, even after enabling the option to search past line boundaries.

Can you add support for this type of regex to EmEditor ?

PS. I haven't tried the macro yet, and am sure it works fine, but it would be nice if it could be done with regex.

In EmEditor \r is ignored, so you should try using this?



In future versions, I might add a new command to remove duplicate lines, so you won't need to use regular expression replace in the future.

Thanks!

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Yutaka Emura
Developer of EmEditor
http://www.emeditor.com/

Thanks Yutaka, that did the trick!

A new command would be useful, particularly for people who don't scripting or RegEx, as a lot of other Text Editors include a simple menu option for removing duplicates. It would also allow you to highly optimise it, and also include an option to keep the original order (ie. so you don't have to sort it first), which would be useful.

One of my other suggestions was for a simple RegEx library feature, so you can create or import Regex's with a name, optional description, and possibly find settings. This would allow you to select the relevant regex from the library list and then run it.

We are working on such those features in future versions.

Thanks!

----------------
Yutaka Emura
Developer of EmEditor
http://www.emeditor.com/