From: Emanuel Berg via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org>
To: help-gnu-emacs@gnu.org
Subject: Re: hline
Date: Fri, 08 Jan 2021 00:08:51 +0100 [thread overview]
Message-ID: <87zh1kny4c.fsf@zoho.eu> (raw)
In-Reply-To: 87a6tksrdj.fsf@mbork.pl
Marcin Borkowski wrote:
>> (defun hline (&optional char)
>> (interactive "P")
>> (let ((len (- (window-width) (current-column) 1))
>> (c (or char ?-)) )
>> (insert (make-string len c)) ))
>
> Funny how I wrote an almost identical function just two days ago...
> Though I used (1- (window-width)), since in my use case I knew that
> (current-column) would be zero.
>
> Anybody knows why it is necessary to subtract 1?
:O
I don't understand why YOU ask this?
But for everyone else's information, it can be better
explained like this, I think, than the examples I just posted.
If we want to cover the distance between A to B on a line,
this distance is B - A. However B is reported not the _
desired B but B + 1. So by subtracting 1 we get the real B |_|
:)
--
underground experts united
http://user.it.uu.se/~embe8573
https://dataswamp.org/~incal
prev parent reply other threads:[~2021-01-07 23:08 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-07 6:21 hline Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-07 9:49 ` hline Jean Louis
2021-01-07 10:05 ` hline Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-07 14:51 ` hline Tim Visher
2021-01-08 1:00 ` hline Jean Louis
2021-01-07 15:23 ` hline Marcin Borkowski
2021-01-07 22:44 ` hline Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-07 22:57 ` hline Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-07 23:08 ` Emanuel Berg via Users list for the GNU Emacs text editor [this message]
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