From: Emanuel Berg via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org>
To: help-gnu-emacs@gnu.org
Subject: Re: The function naming convention used by Emacs.
Date: Sun, 26 Sep 2021 13:49:48 +0200 [thread overview]
Message-ID: <87o88ftv37.fsf@zoho.eu> (raw)
In-Reply-To: YVBZCeFsllXi1qku@scrozzle
2QdxY4RzWzUUiLuE wrote:
>> As far as function names are concerned, are there some
>> established conventions used by Emacs? For example,
>> I noticed that there are so many functions in Emacs named
>> by the suffix `-p', say, `file-exists-p', `ht-equal-p', and
>> so on. But I still can't figure out the meaning of this
>> suffix. Any tips will be appreciated.
>
> The -p suffix is short for "predicate"; so file-exists-p is
> true if and only if the argument names and existing file.
> I learned of that convention from Common Lisp; I don't know
> the entire history.
Me neither :)
But it is from Predicate Logic which is an extension of
Propositional Logic ...
--
underground experts united
https://dataswamp.org/~incal
next prev parent reply other threads:[~2021-09-26 11:49 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-26 11:05 The function naming convention used by Emacs Hongyi Zhao
2021-09-26 11:27 ` 2QdxY4RzWzUUiLuE
2021-09-26 11:49 ` Emanuel Berg via Users list for the GNU Emacs text editor [this message]
2021-09-26 11:50 ` Hongyi Zhao
2021-09-26 11:48 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-26 12:18 ` Hongyi Zhao
2021-09-26 13:34 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-26 17:04 ` [External] : " Drew Adams
2021-09-27 5:46 ` Hongyi Zhao
2021-09-27 14:53 ` Drew Adams
-- strict thread matches above, loose matches on Subject: below --
2021-09-26 13:32 Pierpaolo Bernardi
2021-09-26 13:35 ` Emanuel Berg via Users list for the GNU Emacs text editor
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