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From: Michal <rabbit50@tenbit.pl>
To: "Drew Adams" <drew.adams@oracle.com>
Cc: 'emacs mailing list' <help-gnu-emacs@gnu.org>
Subject: Re: something like ring.el needed, but not circular
Date: Mon, 10 Mar 2008 10:00:47 +0100	[thread overview]
Message-ID: <m2y78r7y2o.fsf@tenbit.pl> (raw)
In-Reply-To: <002801c88217$bdaefe40$0600a8c0@us.oracle.com> (Drew Adams's message of "Sun\, 9 Mar 2008 10\:59\:45 -0800")


Thanks

"Drew Adams" <drew.adams@oracle.com> writes:

>> Is there in emacs a package that allows walking through
>> a list in both directions, like ring.el, but which is NOT a 
>> ring (I mean circular)?
>
> Might one ask "why"? What do you have against rings? ;-)
>
> If you mean that you want the behavior of, say, Emacs input-history
> traversal: two directions, but two endpoints, then take a look at the
> input-history code. Look for command `next-history-element' in library
> simple.el.
>
> Or you can use a ring and define an endpoint position on it - have your code
> stop when it reaches that point from either direction.




      reply	other threads:[~2008-03-10  9:00 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-09 18:44 something like ring.el needed, but not circular Michal
2008-03-09 18:59 ` Drew Adams
2008-03-10  9:00   ` Michal [this message]

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