From: Jeff Clough <jeff@chaosphere.com>
To: help-gnu-emacs@gnu.org
Subject: Re: LISP Questions - random, random elements and memory management
Date: Wed, 18 Nov 2009 08:09:39 -0500 (EST) [thread overview]
Message-ID: <20091118.080939.42107716.jeff@chaosphere.com> (raw)
In-Reply-To: <20091118.075428.224836459.jeff@chaosphere.com>
From: Jeff Clough <jeff@chaosphere.com>
Date: Wed, 18 Nov 2009 07:54:28 -0500 (EST)
> (defun get-random-element (list)
> "Returns a random element of LIST."
> (if (not (and (list) (listp list)))
> (nth (random (1- (1+ (length list)))) list)
> (error "Argument to get-random-element not a list or the list is empty")))
>
Yay for not being awake! The above should be this:
(defun get-random-element (list)
"Returns a random element of LIST."
(if (and list (listp list))
(nth (random (1- (1+ (length list)))) list)
(error "Argument to get-random-element not a list or the list is empty")))
Jeff
next prev parent reply other threads:[~2009-11-18 13:09 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-18 12:54 LISP Questions - random, random elements and memory management Jeff Clough
2009-11-18 13:09 ` Jeff Clough [this message]
2009-11-19 2:53 ` Kevin Rodgers
2009-11-19 3:03 ` Kevin Rodgers
2009-11-19 11:56 ` Jeff Clough
[not found] ` <mailman.11040.1258631785.2239.help-gnu-emacs@gnu.org>
2009-11-19 13:44 ` Barry Margolin
2009-11-19 15:16 ` Jeff Clough
2009-11-20 3:52 ` Kevin Rodgers
[not found] ` <mailman.11114.1258689162.2239.help-gnu-emacs@gnu.org>
2009-11-20 6:28 ` Barry Margolin
[not found] ` <mailman.11056.1258643746.2239.help-gnu-emacs@gnu.org>
2009-11-19 17:40 ` Colin S. Miller
2009-11-19 18:57 ` Jeff Clough
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