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RE: something like ring.el needed, but not circular
From: |
Drew Adams |
Subject: |
RE: something like ring.el needed, but not circular |
Date: |
Sun, 9 Mar 2008 10:59:45 -0800 |
> 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.