Re: Removing duplicated lines

[Jambunathan K <kjambunathan@gmail.com>]

Dani Moncayo <dmoncayo@gmail.com> writes:

> Hi,
>
> Does (vanilla) Emacs have some command for removing duplicated lines
> in a given region?
>
> This is a command I'm missing for some time.
>
> I've done a quick search, but didn't found anything.
>
> If there isn't such command, I think I'd file a feature request.

Something like this ...

    (defun delete-duplicate-lines (beg end)
      (interactive "r")
      (let ((lines (split-string (buffer-substring beg end) "\n")))
        (delete-region beg end)
        (insert
         (mapconcat #'identity (delete-dups lines) "\n"))))

> TIA.

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