* Why is `nreverse' called `nreverse'?
@ 2023-10-30 6:00 Marcin Borkowski
2023-10-30 6:32 ` Per Starbäck
2023-10-30 9:17 ` Stephen Berman
0 siblings, 2 replies; 6+ messages in thread
From: Marcin Borkowski @ 2023-10-30 6:00 UTC (permalink / raw)
To: emacs-tangents@gnu.org
Hi all,
I know that the "n-" prefix means that it is destructive. But why "n-"?
I also know that this comes from Common Lisp, but still -- why the
letter "n-"?
TIA,
--
Marcin Borkowski
http://mbork.pl
---
via emacs-tangents mailing list (https://lists.gnu.org/mailman/listinfo/emacs-tangents)
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Why is `nreverse' called `nreverse'?
2023-10-30 6:00 Why is `nreverse' called `nreverse'? Marcin Borkowski
@ 2023-10-30 6:32 ` Per Starbäck
2023-10-30 7:08 ` [External] : " Drew Adams
2023-10-30 9:17 ` Stephen Berman
1 sibling, 1 reply; 6+ messages in thread
From: Per Starbäck @ 2023-10-30 6:32 UTC (permalink / raw)
To: Marcin Borkowski; +Cc: emacs-tangents@gnu.org
The N- prefix for destructive functions is indeed present in Common
Lisp, but it goes further back than that. It is so in Maclisp, which
both Common Lisp and GNU Emacs Lisp have taken a lot from.
(If it also existed in lisps prior to Maclisp I don't know.) Pitman's
"The Revised Maclisp Manual" doesn't explain the N-. I guess it may
have come from NCONC.
Den mån 30 okt. 2023 kl 07:01 skrev Marcin Borkowski <mbork@mbork.pl>:
>
> Hi all,
>
> I know that the "n-" prefix means that it is destructive. But why "n-"?
> I also know that this comes from Common Lisp, but still -- why the
> letter "n-"?
>
> TIA,
>
> --
> Marcin Borkowski
> http://mbork.pl
>
> ---
> via emacs-tangents mailing list (https://lists.gnu.org/mailman/listinfo/emacs-tangents)
---
via emacs-tangents mailing list (https://lists.gnu.org/mailman/listinfo/emacs-tangents)
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Why is `nreverse' called `nreverse'?
2023-10-30 6:00 Why is `nreverse' called `nreverse'? Marcin Borkowski
2023-10-30 6:32 ` Per Starbäck
@ 2023-10-30 9:17 ` Stephen Berman
2023-10-31 17:25 ` Marcin Borkowski
1 sibling, 1 reply; 6+ messages in thread
From: Stephen Berman @ 2023-10-30 9:17 UTC (permalink / raw)
To: Marcin Borkowski; +Cc: emacs-tangents@gnu.org
On Mon, 30 Oct 2023 07:00:36 +0100 Marcin Borkowski <mbork@mbork.pl> wrote:
> Hi all,
>
> I know that the "n-" prefix means that it is destructive. But why "n-"?
> I also know that this comes from Common Lisp, but still -- why the
> letter "n-"?
>
> TIA,
Paul Graham writes in ANSI Common Lisp (Chapter 12, page 202, footnote 2):
The n originally stood for "non-consing."
Steve Berman
---
via emacs-tangents mailing list (https://lists.gnu.org/mailman/listinfo/emacs-tangents)
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2023-10-31 17:26 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-10-30 6:00 Why is `nreverse' called `nreverse'? Marcin Borkowski
2023-10-30 6:32 ` Per Starbäck
2023-10-30 7:08 ` [External] : " Drew Adams
2023-10-31 17:26 ` Marcin Borkowski
2023-10-30 9:17 ` Stephen Berman
2023-10-31 17:25 ` Marcin Borkowski
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