From: Emanuel Berg via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org>
To: help-gnu-emacs@gnu.org
Subject: this is United States calling (was: Re: [External] : Is there any difference between `equal' and `string=' for strings?)
Date: Sat, 21 Aug 2021 05:43:06 +0200 [thread overview]
Message-ID: <87k0kf5uph.fsf_-_@zoho.eu> (raw)
In-Reply-To: SJ0PR10MB548848086BBF13CDACA316ACF3C09@SJ0PR10MB5488.namprd10.prod.outlook.com
Drew Adams wrote:
> If both args are strings those predicates always give the
> same result.
>
> `equal' is not costly for simple things that can also be
> compared with, say `eq' or `string='. It's costly for things
> like complex list structure. But when you need `equal' you
> need `equal'. ;-)
If one passes complex list structures as an argument to
a function, how does that happen? Does it happen differently
from other types, maybe just a reference to the `car'?
I've heard of call by reference, call by value and call
by copy.
How does that work in Elisp?
And what if the value is a reference?
--
underground experts united
https://dataswamp.org/~incal
next prev parent reply other threads:[~2021-08-21 3:43 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-19 4:56 Is there any difference between `equal' and `string=' for strings? Marcin Borkowski
2021-08-19 6:21 ` Jean Louis
2021-08-19 23:14 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-20 5:35 ` Jean Louis
2021-08-20 6:32 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-21 9:05 ` Jean Louis
2021-08-21 19:14 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-19 15:35 ` [External] : " Drew Adams
2021-08-21 3:43 ` Emanuel Berg via Users list for the GNU Emacs text editor [this message]
2021-08-21 3:49 ` this is United States calling (was: Re: [External] : Is there any difference between `equal' and `string=' for strings?) Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-21 4:20 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-21 5:39 ` FW: " Drew Adams
2021-08-21 19:41 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-21 6:50 ` tomas
2021-08-21 19:41 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-19 23:02 ` Is there any difference between `equal' and `string=' for strings? Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-20 5:25 ` Jean Louis
2021-08-20 6:24 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-20 6:41 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-20 23:12 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-20 23:42 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-21 0:08 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-21 0:30 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-21 9:08 ` Jean Louis
2021-08-21 19:17 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-21 9:04 ` Jean Louis
2021-08-21 19:09 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-24 14:55 ` Marcin Borkowski
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