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From: "Drew Adams" <drew.adams@oracle.com>
To: "'Thierry Volpiatto'" <thierry.volpiatto@gmail.com>,
	"'Nikolaj Schumacher'" <me@nschum.de>
Cc: help-gnu-emacs@gnu.org, 'David Kastrup' <dak@gnu.org>
Subject: RE: Adding Lists/Sequences
Date: Wed, 24 Sep 2008 07:50:48 -0700	[thread overview]
Message-ID: <004a01c91e54$f1f940a0$0200a8c0@us.oracle.com> (raw)
In-Reply-To: <873ajprhpp.fsf@thievol.homelinux.org>

>> explain when it is good (if it is) to use these destructive functions.
>
> Generally, speed.  Non-destructive operations often create 
> or copy a lot of new cons cells.

Or when you want to share Lisp structure. A special case is a circular
structure, which shares part(s) of itself with itself.





  reply	other threads:[~2008-09-24 14:50 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-09-23 11:46 Adding Lists/Sequences Nordlöw
2008-09-23 11:52 ` Joost Kremers
2008-09-23 13:22   ` Nordlöw
2008-09-23 15:06 ` Tassilo Horn
2008-09-23 15:28 ` Thierry Volpiatto
     [not found] ` <mailman.19769.1222183171.18990.help-gnu-emacs@gnu.org>
2008-09-23 19:26   ` Pascal J. Bourguignon
2008-09-23 20:48     ` Thierry Volpiatto
2008-09-23 22:11   ` David Kastrup
2008-09-24  7:09     ` Thierry Volpiatto
2008-09-24  9:28       ` Nikolaj Schumacher
2008-09-24  9:55         ` Thierry Volpiatto
2008-09-24 14:50           ` Drew Adams [this message]
2008-09-24 15:31             ` Thierry Volpiatto
2008-09-24 15:28               ` David Kastrup
2008-09-24 18:03                 ` Thierry Volpiatto
2008-09-24 15:49               ` Drew Adams
2008-09-24 17:59                 ` Thierry Volpiatto
     [not found]     ` <mailman.19799.1222239593.18990.help-gnu-emacs@gnu.org>
2008-09-25  5:27       ` Tim X
2008-09-25 20:34         ` David Kastrup
2008-09-25 22:16           ` Pascal J. Bourguignon

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