From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 7972 invoked by alias); 19 Apr 2011 17:32:11 -0000 Mailing-List: contact zsh-users-help@zsh.org; run by ezmlm Precedence: bulk X-No-Archive: yes List-Id: Zsh Users List List-Post: List-Help: X-Seq: 15967 Received: (qmail 6998 invoked from network); 19 Apr 2011 17:32:09 -0000 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) 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=3.3.1 Received-SPF: none (ns1.primenet.com.au: domain at csr.com does not designate permitted sender hosts) Date: Tue, 19 Apr 2011 18:32:03 +0100 From: Peter Stephenson To: Subject: Re: Test if parameter is set Message-ID: <20110419183203.6005e247@pwslap01u.europe.root.pri> In-Reply-To: <20110419182641.6dcaba6a@pwslap01u.europe.root.pri> References: <20110419182641.6dcaba6a@pwslap01u.europe.root.pri> Organization: Cambridge Silicon Radio X-Mailer: Claws Mail 3.7.8 (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: [10.103.11.49] X-Scanned-By: MailControl A_10_80_00 (www.mailcontrol.com) on 10.68.0.111 On Tue, 19 Apr 2011 18:26:41 +0100 Peter Stephenson wrote: > However, you can do this in a more standard way, should you wish, > with > > if [[ -n ${VAR+1} ]]; then > ... (Not yet *that* standard, in fact, but Frank has covered that.) -- 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