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Re: add-hook
From: |
Robert D. Crawford |
Subject: |
Re: add-hook |
Date: |
Wed, 06 Jun 2007 15:41:20 -0500 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.1.50 (gnu/linux) |
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)
- add-hook, Sebastian Tennant, 2007/06/06
- Re: add-hook, Sebastian Tennant, 2007/06/06
- Message not available
- Re: add-hook, Katsumi Yamaoka, 2007/06/06
- Re: add-hook,
Robert D. Crawford <=