Re: [External] : Re: Appending lists

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

After this discussion, I thought I'd examine my `nconc' once
more and I then realized my use of them resembles a functional
style, while it (nconc) is already destructively doing the
updating, so that's not needed. E.g., this

  ;; (setq completion-ignored-extensions
  ;;       (nconc completion-ignored-extensions '(".bcf" ".elc" ".run.xml")) )

can be changed into (should be changed, since the above makes
no difference - ?) it can be changed into

  (nconc completion-ignored-extensions '(".bcf" ".run.xml"))

(I removed the ".elc" as that seems to be there by default, now.)

Then case 2, same thing, this

  ;; (let ((modes (list
  ;;               '("\\.bal\\'"     . balance-mode)
  ;;               '("\\.grm\\'"     . sml-mode)
  ;;               '("\\.lu\\'"      . lua-mode)
  ;;               '("\\.nqp\\'"     . perl-mode)
  ;;               '("\\.php\\'"     . html-mode)
  ;;               '("\\.pic\\'"     . nroff-mode)
  ;;               '("\\.pl\\'"      . prolog-mode)
  ;;               '("\\.sed\\'"     . conf-mode)
  ;;               '("\\.service\\'" . conf-mode)
  ;;               '("\\.tex\\'"     . latex-mode)
  ;;               '("\\.xr\\'"      . conf-xdefaults-mode)
  ;;               '("*"             . text-mode) )))
  ;;   (setq auto-mode-alist (nconc modes auto-mode-alist)) )

might as well be

  (nconc (list
          '("\\.bal\\'"     . balance-mode)
          '("\\.grm\\'"     . sml-mode)
          '("\\.lu\\'"      . lua-mode)
          '("\\.nqp\\'"     . perl-mode)
          '("\\.php\\'"     . html-mode)
          '("\\.pic\\'"     . nroff-mode)
          '("\\.pl\\'"      . prolog-mode)
          '("\\.sed\\'"     . conf-mode)
          '("\\.service\\'" . conf-mode)
          '("\\.tex\\'"     . latex-mode)
          '("\\.xr\\'"      . conf-xdefaults-mode)
          '("*"             . text-mode) )
         auto-mode-alist)

right?

source:
  https://dataswamp.org/~incal/emacs-init/dired-incal.el
  https://dataswamp.org/~incal/emacs-init/mode-by-filename.el

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https://dataswamp.org/~incal