Re: How to implement line sorting, uniquifying and counting function in emacs?

[Steven M. Haflich]

gnuist006 wrote:

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

A pure Common Lisp equivalent is the following, reading standard-input:

(loop with last-line
    for line in (sort (loop as x = (read-line *standard-input* nil nil)
                          while x collect x)
                      #'string<)
    unless (equal last-line line)
    count 1
    do (setf last-line line))

Probably not want you wanted.  Probably meaningless to you.