From: Yuri Khan <yuri.v.khan@gmail.com>
To: "Basil L. Contovounesios" <contovob@tcd.ie>
Cc: "Mattias Engdegård" <mattiase@acm.org>,
"Andy Moreton" <andrewjmoreton@gmail.com>,
"Emacs developers" <emacs-devel@gnu.org>
Subject: Re: 7 logical-xor implementations in source tree
Date: Tue, 23 Jul 2019 18:01:05 +0700 [thread overview]
Message-ID: <CAP_d_8X+z38nnPUu6jSBt6JLZXctUBYzNRqH0fgER7zJMnc=uw@mail.gmail.com> (raw)
In-Reply-To: <8736ixni7q.fsf@tcd.ie>
On Tue, Jul 23, 2019 at 5:44 PM Basil L. Contovounesios <contovob@tcd.ie> wrote:
> Most people seem to define n-ary xor as a parity check (i.e. its result
> is non-nil if the number of non-nil arguments is odd).
The other interpretation, based on the literal meaning of “exclusive
or”, is that the result is non-nil if exactly one argument is non-nil.
(Could actually return that one argument as the result.)
With both interpretations, a vacuous xor is nil.
next prev parent reply other threads:[~2019-07-23 11:01 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-22 18:48 7 logical-xor implementations in source tree Oleh Krehel
2019-07-22 21:47 ` Basil L. Contovounesios
2019-07-24 22:17 ` Basil L. Contovounesios
2019-07-24 23:15 ` Stefan Monnier
2019-07-24 23:44 ` Basil L. Contovounesios
2019-07-25 12:07 ` Mattias Engdegård
2019-07-25 17:28 ` Paul Eggert
2019-07-25 17:46 ` Mattias Engdegård
2019-07-28 7:09 ` Philippe Schnoebelen
2019-07-28 8:04 ` Alan Mackenzie
2019-07-28 19:43 ` Marcin Borkowski
2019-07-30 9:36 ` Alan Mackenzie
2019-07-30 10:57 ` Philippe Schnoebelen
2019-07-30 11:28 ` Andy Moreton
2019-07-30 12:34 ` Stefan Monnier
2019-07-30 14:25 ` Barry Fishman
2019-07-31 3:16 ` Richard Stallman
2019-07-31 15:20 ` Barry Fishman
2019-07-31 15:42 ` Stefan Monnier
2019-07-31 20:22 ` Basil L. Contovounesios
2019-07-31 21:15 ` Michael Heerdegen
2019-07-31 22:28 ` Mattias Engdegård
2019-07-31 23:39 ` Basil L. Contovounesios
2019-08-02 10:29 ` Mattias Engdegård
2019-08-02 10:59 ` Basil L. Contovounesios
2019-08-06 11:58 ` Mattias Engdegård
2019-07-31 20:31 ` Michael Heerdegen
2019-07-31 21:38 ` Drew Adams
2019-07-31 22:03 ` Drew Adams
2019-07-31 22:05 ` Basil L. Contovounesios
2019-07-31 23:20 ` Drew Adams
2019-08-01 0:09 ` Basil L. Contovounesios
2019-07-31 17:12 ` Marcin Borkowski
2019-07-23 8:39 ` Andy Moreton
2019-07-23 9:08 ` Basil L. Contovounesios
2019-07-23 9:14 ` Mattias Engdegård
2019-07-23 10:26 ` Andy Moreton
2019-07-23 10:40 ` Andreas Schwab
2019-07-23 12:11 ` Andy Moreton
2019-07-23 13:20 ` Basil L. Contovounesios
2019-07-23 13:54 ` Andy Moreton
2019-07-24 22:21 ` Basil L. Contovounesios
2019-07-23 10:44 ` Basil L. Contovounesios
2019-07-23 11:01 ` Yuri Khan [this message]
2019-07-25 21:46 ` Juri Linkov
2019-07-23 11:24 ` Noam Postavsky
2019-07-23 12:38 ` Stefan Monnier
2019-07-23 16:41 ` Mattias Engdegård
2019-07-23 17:12 ` Eli Zaretskii
2019-07-23 17:48 ` Paul Eggert
2019-07-23 19:45 ` Stefan Monnier
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