From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 12667 invoked by alias); 22 Feb 2012 10:43:05 -0000 Mailing-List: contact zsh-workers-help@zsh.org; run by ezmlm Precedence: bulk X-No-Archive: yes List-Id: Zsh Workers List List-Post: List-Help: X-Seq: 30253 Received: (qmail 11426 invoked from network); 22 Feb 2012 10:43:03 -0000 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on f.primenet.com.au X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_LOW, SPF_HELO_PASS autolearn=ham version=3.3.2 Received-SPF: none (ns1.primenet.com.au: domain at csr.com does not designate permitted sender hosts) Date: Wed, 22 Feb 2012 09:52:48 +0000 From: Peter Stephenson To: Subject: Re: let unset array element remove compatible with bash Message-ID: <20120222095248.1ea8140b@pwslap01u.europe.root.pri> In-Reply-To: <120221210106.ZM13374@torch.brasslantern.com> References: <120221210106.ZM13374@torch.brasslantern.com> Organization: Cambridge Silicon Radio X-Mailer: Claws Mail 3.7.9 (GTK+ 2.22.0; i386-redhat-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.101.10.170] X-Scanned-By: MailControl 7.6.6 (www.mailcontrol.com) on 10.71.0.134 On Tue, 21 Feb 2012 21:01:06 -0800 Bart Schaefer wrote: > On Feb 22, 3:28am, Daniel Lin wrote: > } > } Can any developer consider to enhance zsh's function like "unset var[2]"? > > Hmm, what's the reason NOT to do this? I can think of one: "unset var[9]" > might cause elements 2 through 8 to spring into existence, which is surely > counter-intuitive ... but of course the same thing happens with var[9]=(). It should work, but it's not quite trivial: $ array=(one three) $ echo ${#array[*]} 2 $ unset 'array[8]' $ echo ${#array[*]} 2 So it's not simply a case of unconditionally deleting an element. I think you need to check the element is present in the first place. -- Peter Stephenson Software Engineer Tel: +44 (0)1223 692070 Cambridge Silicon Radio Limited Churchill House, Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ, UK Member of the CSR plc group of companies. CSR plc registered in England and Wales, registered number 4187346, registered office Churchill House, Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ, United Kingdom More information can be found at www.csr.com. Follow CSR on Twitter at http://twitter.com/CSR_PLC and read our blog at www.csr.com/blog