From: Thorsten Jolitz <tjolitz@gmail.com>
To: help-gnu-emacs@gnu.org
Subject: 'length' function for lists and cons cells?
Date: Thu, 21 Mar 2013 19:21:29 +0100 [thread overview]
Message-ID: <87620k7gwm.fsf@gmail.com> (raw)
Hi List,
which function could I use when I map an alist e.g. with dolist, that
contains both types of associations as shown below: cons cells, or lists
with 3 or more elements?
'length' doesn't work on cons cells:
,------------------------
| (length '("a" "b" "c"))
| 3
`------------------------
,--------------------------------------------------------------
| (length '("a" . "c"))
|
| Debugger entered--Lisp error: (wrong-type-argument listp "c")
| length(("a" . "c"))
`--------------------------------------------------------------
--
cheers,
Thorsten
next reply other threads:[~2013-03-21 18:21 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-21 18:21 Thorsten Jolitz [this message]
2013-03-21 20:02 ` 'length' function for lists and cons cells? Stephen Berman
2013-03-21 21:58 ` Thorsten Jolitz
2013-03-21 22:05 ` Drew Adams
[not found] ` <mailman.22591.1363903134.855.help-gnu-emacs@gnu.org>
2013-03-23 11:24 ` Pascal J. Bourguignon
2013-03-21 20:10 ` Drew Adams
2013-03-21 22:09 ` Thorsten Jolitz
[not found] ` <mailman.22588.1363896620.855.help-gnu-emacs@gnu.org>
2013-03-25 15:24 ` duthen.cnv
2013-03-25 20:02 ` Pascal J. Bourguignon
[not found] <mailman.22586.1363890109.855.help-gnu-emacs@gnu.org>
2013-03-21 20:49 ` Pascal J. Bourguignon
2013-03-22 2:38 ` Thorsten Jolitz
2013-03-22 7:27 ` Mark Skilbeck
2013-03-22 9:57 ` Thorsten Jolitz
[not found] ` <mailman.22632.1363946271.855.help-gnu-emacs@gnu.org>
2013-03-23 12:19 ` Pascal J. Bourguignon
2013-03-23 15:35 ` Drew Adams
[not found] ` <mailman.22706.1364052941.855.help-gnu-emacs@gnu.org>
2013-03-23 15:52 ` Pascal J. Bourguignon
2013-03-24 5:20 ` Drew Adams
[not found] ` <mailman.22618.1363919920.855.help-gnu-emacs@gnu.org>
2013-03-22 7:45 ` Barry Margolin
2013-03-23 11:31 ` Pascal J. Bourguignon
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