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From: <tomas@tuxteam.de>
To: help-gnu-emacs@gnu.org
Subject: Re: Lisp anime video
Date: Sun, 29 Aug 2021 14:06:27 +0200	[thread overview]
Message-ID: <20210829120627.GG18750@tuxteam.de> (raw)
In-Reply-To: <87h7f87c38.fsf@zoho.eu>

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On Sun, Aug 29, 2021 at 12:57:15PM +0200, Emanuel Berg via Users list for the GNU Emacs text editor wrote:
> tomas wrote:
> 
> >> ;; this file:
> >> ;;   https://dataswamp.org/~incal/scheme/fac.scm
> >> 
> >> (define (fac n)
> >>   (if (> n 1)
> >>       (* n (fac (- n 1)))
> >>     1) )
> >> 
> >> (fac 10) ; 3 628 800
> >
> > That looks for me like a pretty reasonable value for (fac
> > 10). Actually, more reasonable that any other value?
> 
> Yes, but I wrote that. In the video they show another piece of
> code which doesn't work in MIT/GNU Scheme what I can see.

So the difference is (1- n) vs (- n 1)? Why don't you say that,
instead of letting people find out?

Perhaps the function `1-' is just missing in "your" Scheme. You
can have it with

  (def (1- n) (- n 1))

if you want :)

Note: Guile knows about `1-'.

Cheers
 - t

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  reply	other threads:[~2021-08-29 12:06 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-29  5:28 Lisp anime video Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-29  5:30 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-29  5:43 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-29  7:40 ` tomas
2021-08-29  8:11   ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-29 10:00     ` tomas
2021-08-29 10:57       ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-29 12:06         ` tomas [this message]
2021-08-29 15:44           ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-29 16:04             ` tomas
2021-08-29 16:10               ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-29 11:01     ` Philip Kaludercic
2021-08-29 17:42       ` [External] : " Drew Adams
2021-08-29 17:44         ` Drew Adams
2021-08-30 22:59           ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-31  2:14             ` Drew Adams
2021-09-04 10:45             ` Wayne Harris via Users list for the GNU Emacs text editor
2021-08-29 18:03         ` Philip Kaludercic
2021-08-29 18:05           ` Drew Adams
2021-08-30  0:19         ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-30 11:57           ` Marcin Borkowski
2021-08-30 15:13             ` Colin Baxter
2021-08-29 17:42       ` Drew Adams
2021-09-04 10:49       ` Wayne Harris via Users list for the GNU Emacs text editor
2021-09-04 13:44         ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-04 15:12           ` Wayne Harris via Users list for the GNU Emacs text editor
2021-09-04 22:55             ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-05  0:13               ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-05  1:20                 ` [External] : " Drew Adams
2021-09-05  1:27                   ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-05 15:14                     ` Drew Adams
2021-09-05 15:16                       ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-05  7:29                 ` tomas
2021-09-05 14:46                   ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-05 15:05                     ` tomas
2021-09-05 15:11                       ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-05 19:55                       ` Arthur Miller
2021-09-05 21:02                         ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-06  5:08                           ` Arthur Miller
2021-09-04 15:39           ` FW: [External] : " Drew Adams
2021-09-04 16:31             ` Stefan Monnier via Users list for the GNU Emacs text editor
2021-09-04 17:51               ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-04 19:16               ` FW: " Drew Adams
2021-09-24  5:38             ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-24  6:53               ` tomas
2021-09-24  7:30                 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-24 16:39                   ` Drew Adams
2021-09-24 17:03                     ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-24 18:44                       ` Drew Adams
2021-08-29  8:14   ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-29  8:25     ` Omar Polo
2021-09-04 10:52       ` Wayne Harris via Users list for the GNU Emacs text editor
2021-08-29 10:03     ` tomas
2021-08-29 15:07     ` Arthur Miller

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