Re: Removing line and column number settings from some buffers

[Jean Louis]

* Drew Adams <drew.adams@oracle.com> [2020-12-05 18:42]:
> > No experience with ring.  How is it used and what do you do?  Suppose I
> > want a keybinding to cycle auto-fill with three things.
> > 
> > 1. Auto-Fill Comments
> > 2. Auto-Fill Entire Buffer
> > 3. Disable Auto-Fill
> 
> 
> https://lists.gnu.org/archive/html/help-gnu-emacs/2020-11/msg00392.html
> 
> And you do have experience with Emacs rings, even if you're not aware of it: 
> 
> `C-h v search-ring'
> `C-h v regexp-search-ring'

Please help with `toto' in this example.

On the other hand, if you want to be able to go either
forward or backward then you might want to use a ring
(as defined in standard library ring.el):

(defvar ring (ring-convert-sequence-to-ring '(nil t always)))
(defvar current nil)

(defun next ()
  (interactive)
  (setq current  (ring-next toto current))
  (message "NOW: %s" current))

(defun previous ()
  (interactive)
  (setq current  (ring-previous toto current))
  (message "NOW: %s" current))