From mboxrd@z Thu Jan  1 00:00:00 1970
Path: main.gmane.org!not-for-mail
From: gnuist006@hotmail.com (gnuist006)
Newsgroups: gmane.emacs.help
Subject: How to implement line sorting, uniquifying and counting function in emacs?
Date: 29 Sep 2002 19:13:06 -0700
Organization: http://groups.google.com/
Sender: help-gnu-emacs-admin@gnu.org
Message-ID: <b00bb831.0209291813.72d27e23@posting.google.com>
NNTP-Posting-Host: localhost.gmane.org
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
X-Trace: main.gmane.org 1033352776 7459 127.0.0.1 (30 Sep 2002 02:26:16 GMT)
X-Complaints-To: usenet@main.gmane.org
NNTP-Posting-Date: Mon, 30 Sep 2002 02:26:16 +0000 (UTC)
Return-path: <help-gnu-emacs-admin@gnu.org>
Original-Received: from monty-python.gnu.org ([199.232.76.173])
	by main.gmane.org with esmtp (Exim 3.35 #1 (Debian))
	id 17vqGE-0001wB-00
	for <gnu-help-gnu-emacs@m.gmane.org>; Mon, 30 Sep 2002 04:26:14 +0200
Original-Received: from localhost ([127.0.0.1] helo=monty-python.gnu.org)
	by monty-python.gnu.org with esmtp (Exim 4.10)
	id 17vqGS-0001PT-00; Sun, 29 Sep 2002 22:26:28 -0400
Original-Path: shelby.stanford.edu!nntp.stanford.edu!newsfeed.stanford.edu!postnews1.google.com!not-for-mail
Original-Newsgroups: gnu.emacs.help,comp.lang.lisp,gnu.utils.help,comp.unix.shell,comp.unix.programmer
Original-Lines: 22
Original-NNTP-Posting-Host: 209.178.178.122
Original-X-Trace: posting.google.com 1033351986 25672 127.0.0.1 (30 Sep 2002 02:13:06 GMT)
Original-X-Complaints-To: groups-abuse@google.com
Original-NNTP-Posting-Date: 30 Sep 2002 02:13:06 GMT
Original-Xref: nntp.stanford.edu gnu.emacs.help:105525 comp.lang.lisp:94987 gnu.utils.help:4058 comp.unix.shell:133577 comp.unix.programmer:143531
Original-To: help-gnu-emacs@gnu.org
Errors-To: help-gnu-emacs-admin@gnu.org
X-BeenThere: help-gnu-emacs@gnu.org
X-Mailman-Version: 2.0.11
Precedence: bulk
List-Help: <mailto:help-gnu-emacs-request@gnu.org?subject=help>
List-Post: <mailto:help-gnu-emacs@gnu.org>
List-Subscribe: <http://mail.gnu.org/mailman/listinfo/help-gnu-emacs>,
	<mailto:help-gnu-emacs-request@gnu.org?subject=subscribe>
List-Id: Users list for the GNU Emacs text editor <help-gnu-emacs.gnu.org>
List-Unsubscribe: <http://mail.gnu.org/mailman/listinfo/help-gnu-emacs>,
	<mailto:help-gnu-emacs-request@gnu.org?subject=unsubscribe>
List-Archive: <http://mail.gnu.org/pipermail/help-gnu-emacs/>
Xref: main.gmane.org gmane.emacs.help:2069
X-Report-Spam: http://spam.gmane.org/gmane.emacs.help:2069

In shell you can do this:

   cat file | sort | uniq -d | wc 

to count the repeated lines. You can also do

   cat file | sort | uniq -u | wc

to count the unique lines.

Sometimes I have to do this on windows platform where I do have emacs.
This means that I cannot escape to shell and that route is not available.

Lisp has sort-lines, but no uniq -u or uniq -d available. Also I do not
know the equivalent to wc.

This is where some help is requested. I think that this is not only a
problem of lisp programming, but also algorithms. Which group has this
kind of expertise?

Cheers!
gnuist