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Re: How to implement line sorting, uniquifying and counting function in
From: |
Marc Spitzer |
Subject: |
Re: How to implement line sorting, uniquifying and counting function in emacs? |
Date: |
Mon, 30 Sep 2002 07:04:51 GMT |
User-agent: |
Xnews/5.04.25 |
gnuist006@hotmail.com (gnuist006) wrote in
b00bb831.0209291813.72d27e23@posting.google.com:">news:b00bb831.0209291813.72d27e23@posting.google.com:
> 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
>
if elisp has hashes do the following:
1: open file
2: for each line set it as the key of the hash
and add 1 to the previous value, first time
set it to 1
3a: for the uniq -u count the number of keys
3b: for the uniq -d for each value > 1 add it to
a total then print the total
3c: for the truely uniq lines, value == 1, count
the number of keys who have a value == 1 and
print
marc
- How to implement line sorting, uniquifying and counting function in emacs?, gnuist006, 2002/09/29
- Re: How to implement line sorting, uniquifying and counting function in emacs?, Evgeny Roubinchtein, 2002/09/30
- Re: How to implement line sorting, uniquifying and counting function in emacs?, Evgeny Roubinchtein, 2002/09/30
- Re: How to implement line sorting, uniquifying and counting function in emacs?,
Marc Spitzer <=
- Re: How to implement line sorting, uniquifying and counting function in emacs?, Jens Schmidt, 2002/09/30
- Re: How to implement line sorting, uniquifying and counting function in emacs?, Kaz Kylheku, 2002/09/30