From: Eli Zaretskii <eliz@gnu.org>
To: help-gnu-emacs@gnu.org
Subject: Re: Underline the current line (function inside)
Date: Fri, 11 Jun 2021 20:55:25 +0300 [thread overview]
Message-ID: <83im2k9tgy.fsf@gnu.org> (raw)
In-Reply-To: <YMOCWV9xZvDE4aoD@protected.localdomain> (message from Jean Louis on Fri, 11 Jun 2021 18:33:45 +0300)
> Date: Fri, 11 Jun 2021 18:33:45 +0300
> From: Jean Louis <bugs@gnu.support>
> Cc: help-gnu-emacs@gnu.org
>
> (defun underline-line ()
> "Underline the current line."
> (interactive)
> (let* ((start (line-beginning-position))
> (end (line-end-position))
> (length (string-width (buffer-substring-no-properties start end))))
> (end-of-line)
> (newline)
> (insert (make-string length ?=))
> (newline)))
Right. I suggest to try the alternative that uses current-column, it
will allow you to avoid consing a string, and I think will also be
faster.
prev parent reply other threads:[~2021-06-11 17:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-11 14:32 Underline the current line (function inside) Jean Louis
2021-06-11 14:52 ` Eli Zaretskii
2021-06-11 15:33 ` Jean Louis
2021-06-11 17:55 ` Eli Zaretskii [this message]
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