Re: delete all whitespace (space) in a region

[Andreas Röhler]

Am 09.11.23 um 06:34 schrieb tomas@tuxteam.de:
> On Wed, Nov 08, 2023 at 09:24:53PM -0500, tpeplt wrote:
> > Manuel Giraud via Users list for the GNU Emacs text editor
> > <help-gnu-emacs@gnu.org>  writes:
> > > If you don't want to confirm for the replacements, you could instead do
> > > this:
> > >
> > > (defun my-delete-all-whitespace-region (beg end)
> > >    (interactive "r")
> > >    (save-excursion
> > >      (goto-char beg)
> > >      (while (re-search-forward " " end t)
> > >        (replace-match ""))))
> A small optimisation would be to use the regexp " +", meaning one
> or more spaces.
>
> > Emacs 28 added the function ‘replace-string-in-region’.
> >
> > (defun my-delete-all-whitespace-region (beg end)
> >    (interactive "r")
> >    (save-excursion
> >      (replace-string-in-region " " "" beg end)))
> To have this here, you'd have to "replace-regexp-in-region", of
> course.
>
> Cheers

BTW the code using replace-string-in-region and the form above are not 
equivalent.

The latter updates the end, whereas the previous keeps the old limit, 
which may do unexpected deletions.

Cheers,

Andreas