From: David Kastrup <dak@gnu.org>
Cc: ttn@glug.org, storm@cua.dk, emacs-devel@gnu.org
Subject: Re: EWMH package, please review.
Date: 18 Oct 2003 20:15:05 +0200 [thread overview]
Message-ID: <x5brse8lau.fsf@lola.goethe.zz> (raw)
In-Reply-To: <x5fzhq8lr1.fsf@lola.goethe.zz>
David Kastrup <dak@gnu.org> writes:
> "Jan D." <jan.h.d@swipnet.se> writes:
>
> > It was functional programming that we used Lisp for (never
> > reassign variables, among other things), so it kind of stuck. And
> > there was questions asked at the time :-).
>
> You mean things like doing recursion without having a lexical
> possibility to let a lambda function refer to itself?
>
> Emacs-Lisp:
>
> ((lambda (f g n) (funcall g (funcall f f g) n))
> (lambda (f g) `(lambda (n) (,g (funcall ,f ,f ,g) n)))
> (lambda (f n) (if (zerop n) 1 (* n (funcall f (1- n)))))
> 5)
>
> Common Lisp: delete the ` and ,
Uh, actually you have to add a funcall in the second line, too, in
order to get this through Common Lisp:
((lambda (f g n) (funcall g (funcall f f g) n))
(lambda (f g) (lambda (n) (funcall g (funcall f f g) n)))
(lambda (f n) (if (zerop n) 1 (* n (funcall f (1- n)))))
5)
--
David Kastrup, Kriemhildstr. 15, 44793 Bochum
next prev parent reply other threads:[~2003-10-18 18:15 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-12 16:53 EWMH package, please review Jan D.
2003-10-12 22:17 ` Kim F. Storm
2003-10-12 22:54 ` Miles Bader
2003-10-13 4:34 ` Jan D.
2003-10-13 4:30 ` Jan D.
2003-10-13 7:54 ` David Kastrup
2003-10-13 8:43 ` Thien-Thi Nguyen
2003-10-18 17:47 ` Jan D.
2003-10-18 18:05 ` David Kastrup
2003-10-18 18:15 ` David Kastrup [this message]
2003-10-27 5:56 ` Jan D.
2003-10-13 18:21 ` Richard Stallman
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