From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Original-To: poffice@blade.nagaokaut.ac.jp Delivered-To: poffice@blade.nagaokaut.ac.jp Received: from kankan.nagaokaut.ac.jp (kankan.nagaokaut.ac.jp [133.44.2.24]) by blade.nagaokaut.ac.jp (Postfix) with ESMTP id 6307D19C0024 for ; Tue, 27 Oct 2015 20:57:00 +0900 (JST) Received: from voscc.nagaokaut.ac.jp (voscc.nagaokaut.ac.jp [133.44.1.100]) by kankan.nagaokaut.ac.jp (Postfix) with ESMTP id 95D73B5D9AC for ; Tue, 27 Oct 2015 21:24:47 +0900 (JST) Received: from neon.ruby-lang.org (neon.ruby-lang.org [221.186.184.75]) by voscc.nagaokaut.ac.jp (Postfix) with ESMTP id A432495241E for ; Tue, 27 Oct 2015 21:24:47 +0900 (JST) Received: from [221.186.184.76] (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 1C3B212049B; Tue, 27 Oct 2015 21:24:46 +0900 (JST) X-Original-To: ruby-core@ruby-lang.org Delivered-To: ruby-core@ruby-lang.org Received: from o2.heroku.sendgrid.net (o2.heroku.sendgrid.net [67.228.50.55]) by neon.ruby-lang.org (Postfix) with ESMTPS id 24D44120482 for ; Tue, 27 Oct 2015 21:24:40 +0900 (JST) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sendgrid.me; h=from:to:references:subject:mime-version:content-type:content-transfer-encoding:list-id; s=smtpapi; bh=xpdU/JksOvaDTzp2SFozyk3LFXM=; b=KGXIDyXyh9XNc/lsEK YXD7lAD0UT4cmSAb3EpR6ww6oNFRX0yFwv+g3BRyMs3buaLoMaeL72KSsAdkzBwS +uHwKAbmioOPdUc4F0lavzczmemklnixDi7uAp/irky+ZPxXwrGi6BqjUwxoRRSn MRSL6XNFcnib0vr9zTT4I5k5E= Received: by filter0825p1mdw1.sendgrid.net with SMTP id filter0825p1mdw1.31873.562F6D02B 2015-10-27 12:24:34.212057031 +0000 UTC Received: from herokuapp.com (ec2-23-22-178-45.compute-1.amazonaws.com [23.22.178.45]) by ismtpd0003p1iad1.sendgrid.net (SG) with ESMTP id 0m2R8_0tQuO9s-kyjIzRvw for ; Tue, 27 Oct 2015 12:24:34.281 +0000 (UTC) Date: Tue, 27 Oct 2015 12:24:34 +0000 From: mame@ruby-lang.org To: ruby-core@ruby-lang.org Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Redmine-MailingListIntegration-Message-Ids: 45846 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 11537 X-Redmine-Issue-Author: hsbt X-Redmine-Issue-Assignee: matz X-Redmine-Sender: mame X-Mailer: Redmine X-Redmine-Host: bugs.ruby-lang.org X-Redmine-Site: Ruby Issue Tracking System X-Auto-Response-Suppress: All Auto-Submitted: auto-generated X-SG-EID: ync6xU2WACa70kv/Ymy4QrNMhiuLXJG8OTL2vJD1yS58GTgdodQIwN481LqsmvD0VesPwCFeiDBSOP hMox0V8GXUFd572MmvchQdpsPdu/iPXNd7ys0jjO+PK4ZOusv3txPw416VbxoAceKmxgfZmA2v2zDW kMA0/9M6FDYHdPAYPEOadTGh5OStxk1Gmihv X-ML-Name: ruby-core X-Mail-Count: 71218 Subject: [ruby-core:71218] [Ruby trunk - Feature #11537] Introduce "Safe navigation operator" X-BeenThere: ruby-core@ruby-lang.org X-Mailman-Version: 2.1.15 Precedence: list Reply-To: Ruby developers List-Id: Ruby developers List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: ruby-core-bounces@ruby-lang.org Sender: "ruby-core" Issue #11537 has been updated by Yusuke Endoh. "?." is a valid code. Try: `p ?. + "foo"` -- Yusuke Endoh ---------------------------------------- Feature #11537: Introduce "Safe navigation operator" https://bugs.ruby-lang.org/issues/11537#change-54598 * Author: Hiroshi SHIBATA * Status: Closed * Priority: Normal * Assignee: Yukihiro Matsumoto ---------------------------------------- I sometimes write following code with rails application: ```ruby u = User.find(id) if u && u.profile && u.profile.thumbnails && u.profiles.thumbnails.large ... ``` or ```ruby # Use ActiveSupport if u.try!(:profile).try!(:thumbnails).try!(:large) ... ``` I hope to write shortly above code. Groovy has above operator named "Safe navigation operator" with "`?.`" syntax. Ruby can't use "`?.`" operator. Can we use "`.?`" syntax. like this: ```ruby u = User.find(id) u.?profile.?thumbnails.?large ``` Matz. How do you think about this? -- https://bugs.ruby-lang.org/