Re: Idempotency of add-hook wrt lambda expressions

[Helmut Eller <eller.helmut@gmail.com>]

* Alan Mackenzie [2009-03-05 17:45+0100] writes:

> One of the reasons for using a lambda is to save having to think up a
> function name, and to save cluttering up one's .emacs, or whatever.
> Compare
>
>     (add-hook 'foo-mode-hook (lambda (some-minor-mode 1)))
>
> with
>
>     (defun switch-some-minor-mode-on ()
>       (some-minor-mode 1))
>     (add-hook 'foo-mode-hook 'switch-some-minor-mode-on)
>

I've seen this idiom in several places:

(add-hook 'foo-mode-hook 
          (defun switch-some-minor-mode-on () 
            (some-minor-mode 1)))


Helmut.