Re: Find the longest word in the word list file.

[Emanuel Berg via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org>]

Hongyi Zhao wrote:

> I don't think so. Whether you start completely from scratch,
> with elisp, there are so many selections for doing such
> a thing. This way can give us a deeper understanding of
> algorithms and how computers work.

Here you go,

(defun sort-lines-length (beg end)
  (interactive (if (use-region-p)
                   (list (region-beginning) (region-end))
                 (list (point-min) (point-max)) ))
  (save-excursion
    (save-restriction
      (narrow-to-region beg end)
      (goto-char (point-min))
      (sort-subr nil
                 #'forward-line
                 #'end-of-line
                 nil nil
                 (lambda (a b) (> (- (cdr a) (car a))
                                  (- (cdr b) (car b)) ))))))
(defalias 'sll #'sort-lines-length)

https://dataswamp.org/~incal/emacs-init/sort-incal.el lines 18-32

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