From: "Robert D. Crawford" <rdc1x@comcast.net>
To: help-gnu-emacs@gnu.org
Subject: Re: add-hook
Date: Wed, 06 Jun 2007 15:41:20 -0500 [thread overview]
Message-ID: <87tztkq0i7.fsf@comcast.net> (raw)
In-Reply-To: mailman.1634.1181129906.32220.help-gnu-emacs@gnu.org
Sebastian Tennant <sebyte@smolny.plus.com> writes:
> Am I right in thinking this is OK:
>
> (add-hook 'foo-hook 'bar-function 'baz-function ...)
As I understand it, no. Only one function can be added to a hook at a
time. This is what the lambda is for. In effect it creates a single
function from multiple functions when only one function can be used.
For example:
(add-hook 'emacs-lisp-mode-hook
'(lambda ()
(make-local-hook 'after-save-hook)
(add-hook 'after-save-hook
'(lambda ()
(byte-compile-file buffer-file-name))
nil t)))
Everything contained within the lambda on line 2 is considered one
item.
> That is to say, single functions passed via add-hook are added to a
> list the contents of which are evaluated in turn, but a lambda
> function passed via add-hook is evaluated as it stands, (no list of
> functions is created) so there can be only one lambda function passed
> via add-hook at any one time?
I am not sure what exactly you mean here. I _think_ you can run
add-hook multiple times for the same hook in the same file using lambda
each time, as inefficient as it may be.
I hope this answers your questions,
rdc
--
Robert D. Crawford rdc1x@comcast.net
BOFH excuse #351:
PEBKAC (Problem Exists Between Keyboard And Chair)
next prev parent reply other threads:[~2007-06-06 20:41 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.1634.1181129906.32220.help-gnu-emacs@gnu.org>
2007-06-06 12:04 ` add-hook Katsumi Yamaoka
2007-06-06 20:41 ` Robert D. Crawford [this message]
2013-01-25 19:03 add-hook Perry Smith
2013-01-25 19:18 ` add-hook Drew Adams
2013-01-26 4:03 ` add-hook Dmitry Gutov
[not found] ` <mailman.18346.1359173059.855.help-gnu-emacs@gnu.org>
2013-01-26 5:33 ` add-hook Barry Margolin
2013-01-26 6:21 ` add-hook Dmitry Gutov
-- strict thread matches above, loose matches on Subject: below --
2011-06-04 13:00 add-hook daniele.g
2011-06-04 14:11 ` add-hook Teemu Likonen
2011-06-04 18:35 ` add-hook daniele.g
2011-06-05 10:58 ` add-hook Richard Riley
2011-06-05 18:58 ` add-hook daniele.g
2011-06-05 20:26 ` add-hook Richard Riley
2011-06-05 22:28 ` add-hook daniele.g
2011-06-05 23:33 ` add-hook Richard Riley
2007-06-06 11:26 add-hook Sebastian Tennant
2007-06-07 0:20 ` add-hook Sebastian Tennant
[not found] ` <mailman.1696.1181175524.32220.help-gnu-emacs@gnu.org>
2007-06-07 7:16 ` add-hook Thien-Thi Nguyen
2007-06-07 10:00 ` add-hook Sebastian Tennant
[not found] ` <mailman.1711.1181210337.32220.help-gnu-emacs@gnu.org>
2007-06-07 14:01 ` add-hook Thien-Thi Nguyen
2003-11-10 3:01 add-hook Richard Stallman
2003-11-10 5:07 ` add-hook Miles Bader
2003-11-10 15:41 ` add-hook Stefan Monnier
2003-11-11 2:26 ` add-hook Miles Bader
2003-11-12 20:02 ` add-hook Richard Stallman
2003-11-11 18:22 ` add-hook Richard Stallman
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