unofficial mirror of help-gnu-emacs@gnu.org
 help / color / mirror / Atom feed
From: Jean Louis <bugs@gnu.support>
To: help-gnu-emacs@gnu.org
Subject: Re: same data appears twice, interactive then function body
Date: Wed, 16 Dec 2020 07:16:40 +0300	[thread overview]
Message-ID: <X9mKKK5mWRqfhWWt@protected.rcdrun.com> (raw)
In-Reply-To: <87tusm9z4z.fsf@zoho.eu>

* Emanuel Berg via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org> [2020-12-16 07:03]:
> Stefan Monnier wrote:
> 
> > Here's my take on it:
> >
> >     (defun insert-string-centered (string &optional width)
> >       (interactive
> >        (list (read-from-minibuffer "string: ")
> >              (string-to-number (read-from-minibuffer "width [80]: "))) )
> >       (let*((max         (if (< 0 width) width (+ 42 42 -4)))
> >     [...]
> >
> > Now the question is how to avoid having 42 appear twice,
> > I guess

I remember from micro computers that we used division in this way
to find the center.

(defun insert-centered-text (text &optional width)
  (interactive "MText: ")
  (let* ((width (or width (window-text-width)))
	 (length (length (string-trim text)))
	 (pos (/ (- width length) 2)))
    (move-to-column pos t)
    (insert text)
    (insert "\n")))



  parent reply	other threads:[~2020-12-16  4:16 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-16  1:23 same data appears twice, interactive then function body Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-16  2:44 ` Stefan Monnier
2020-12-16  4:02   ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-16  4:16     ` 2QdxY4RzWzUUiLuE
2020-12-16  4:31       ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-16  4:36         ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-16  4:16     ` Jean Louis [this message]
2020-12-16  4:32       ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-16  4:43         ` Yuri Khan
2020-12-16  5:19           ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-18 14:50             ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-18 16:35               ` Drew Adams
2020-12-18 18:15                 ` Jean Louis
2020-12-18 18:09               ` Jean Louis
2020-12-20  4:45                 ` Emanuel Berg via Users list for the GNU Emacs text editor

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: https://www.gnu.org/software/emacs/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=X9mKKK5mWRqfhWWt@protected.rcdrun.com \
    --to=bugs@gnu.support \
    --cc=help-gnu-emacs@gnu.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).