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: bounds for strings with - between subwords
Date: Fri, 07 May 2021 01:44:23 +0200 [thread overview]
Message-ID: <87h7jf1l7s.fsf@zoho.eu> (raw)
In-Reply-To: trinity-4bc4095e-2586-4947-9d70-e3e4e04fafeb-1620344274022@3c-app-mailcom-bs12
Christopher Dimech wrote:
>> > (defun alpha-bounds ()
>> > "Gets bounds of a subword unit defined by regular expression [a-zA-Z]."
>> > (let ( ($bounds nil) $ma $mb )
>> > (skip-chars-backward "[:alpha:]")
>> > (setq $ma (point))
>> > (skip-chars-forward "[:alpha:]")
>> > (setq $mb (point))
>> > (setq $bounds (bounds-of-thing-at-point 'word))
>> > (cons $ma $mb) ))
>>
>> You can put all that in the `let' to avoid the use of `setq'.
>>
>> Also $bounds doesn't seem to do anything?
>
> bounds are used in another function. You can see there is
> (cons $ma $mb) at the end,
> which is used as output when you call "alpha-bounds".
$bounds still isn't used anywhere else and cannot be, either.
>> And what's the purpose of the $?
>
> I use $ no tell me the variable is local and not being
> modified from outside. It is coming from the $1, $2, $3, ...
> function parameter idea.
But they cannot be modified from the outside so no need to
worry about that.
--
underground experts united
https://dataswamp.org/~incal
next prev parent reply other threads:[~2021-05-06 23:44 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-06 22:32 bounds for strings with - between subwords steve-humphreys
2021-05-06 22:49 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-05-06 23:37 ` Christopher Dimech
2021-05-06 23:44 ` Emanuel Berg via Users list for the GNU Emacs text editor [this message]
2021-05-06 23:58 ` Christopher Dimech
2021-05-07 1:17 ` steve-humphreys
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