From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: David Kastrup Newsgroups: gmane.lisp.guile.devel Subject: Re: Growable arrays? Date: Mon, 11 Jun 2012 12:38:49 +0200 Organization: Organization?!? Message-ID: <87ipeyqgjq.fsf@fencepost.gnu.org> References: <87hauku0mb.fsf@fencepost.gnu.org> <873962sbu0.fsf@fencepost.gnu.org> <87y5nuqpii.fsf@fencepost.gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Trace: dough.gmane.org 1339411587 7916 80.91.229.3 (11 Jun 2012 10:46:27 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Mon, 11 Jun 2012 10:46:27 +0000 (UTC) To: guile-devel@gnu.org Original-X-From: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Mon Jun 11 12:46:26 2012 Return-path: Envelope-to: guile-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Se24Y-0005iV-Ar for guile-devel@m.gmane.org; Mon, 11 Jun 2012 12:42:10 +0200 Original-Received: from localhost ([::1]:55803 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Se24Y-0007cv-6W for guile-devel@m.gmane.org; Mon, 11 Jun 2012 06:42:10 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:56862) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Se24Q-0007c9-W5 for guile-devel@gnu.org; Mon, 11 Jun 2012 06:42:08 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Se24K-0004M6-Ky for guile-devel@gnu.org; Mon, 11 Jun 2012 06:42:02 -0400 Original-Received: from plane.gmane.org ([80.91.229.3]:55167) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Se24K-0004Lg-Dg for guile-devel@gnu.org; Mon, 11 Jun 2012 06:41:56 -0400 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1Se234-0001UE-Pz for guile-devel@gnu.org; Mon, 11 Jun 2012 12:40:38 +0200 Original-Received: from p508eb788.dip.t-dialin.net ([80.142.183.136]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 11 Jun 2012 12:40:38 +0200 Original-Received: from dak by p508eb788.dip.t-dialin.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 11 Jun 2012 12:40:38 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 22 Original-X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: p508eb788.dip.t-dialin.net X-Face: 2FEFf>]>q>2iw=B6, xrUubRI>pR&Ml9=ao@P@i)L:\urd*t9M~y1^:+Y]'C0~{mAl`oQuAl \!3KEIp?*w`|bL5qr,H)LFO6Q=qx~iH4DN; i"; /yuIsqbLLCh/!U#X[S~(5eZ41to5f%E@'ELIi$t^ Vc\LWP@J5p^rst0+('>Er0=^1{]M9!p?&:\z]|;&=NP3AhB!B_bi^]Pfkw User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.1.50 (gnu/linux) Cancel-Lock: sha1:iTsBc4pkeTBModIxQOl6XS4kloU= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-BeenThere: guile-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Developers list for Guile, the GNU extensibility library" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Original-Sender: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.lisp.guile.devel:14585 Archived-At: Daniel Hartwig writes: > On 11 June 2012 17:01, Daniel Hartwig wrote: >> For reference, attached is a growable vector I use in several >> projects, adapted to support the length operation similar to Lua (i.e. >> first unset numerical index).  There is no catching of exceptions >> here, every access to the data is through the dynvector procedures >> which check the index and vector size. > > Always test before posting even small changes to existing code :-) > > Updated attachment to actually run without problems Well, considering the cost of dynvector-grow!, doing the growth in a loop rather then just the determination of the new size seems a bit expensive: (while (<= (dynvector-capacity dynvector) k) (dynvector-grow! dynvector)) -- David Kastrup