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 D7BF217DB6C8 for ; Wed, 4 Nov 2015 09:04:06 +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 15E01B5D840 for ; Wed, 4 Nov 2015 09:32:53 +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 1C03795241E for ; Wed, 4 Nov 2015 09:32:52 +0900 (JST) Received: from [221.186.184.76] (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 675551204D2; Wed, 4 Nov 2015 09:32:51 +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 54FB6120441 for ; Wed, 4 Nov 2015 09:32:47 +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=Xa5wdv02pb31waMMcsFxNc5JJKw=; b=jizwJb7dyFlDW38LwO 5XGsTwz8c1KgdiDWA3zpYeyHPk86CeqWCveGa67OHK8IPap9P4L1obRqs4PAsK3V ZB9LpqT4hUVrK6GE2j8g3IYpzM331qC60VFezrJWp+SGociQWFnGFxWlnXCvkn+Y nsPLgURM1E1aTpjhnswccLmso= Received: by filter0460p1mdw1.sendgrid.net with SMTP id filter0460p1mdw1.5171.5639522A51 2015-11-04 00:32:42.535393902 +0000 UTC Received: from herokuapp.com (ec2-54-161-134-166.compute-1.amazonaws.com [54.161.134.166]) by ismtpd0004p1iad1.sendgrid.net (SG) with ESMTP id fuerOzKfTbOHswWjXKGLAg for ; Wed, 04 Nov 2015 00:32:42.547 +0000 (UTC) Date: Wed, 04 Nov 2015 00:32:42 +0000 From: nobu@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: 45965 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 11537 X-Redmine-Issue-Author: hsbt X-Redmine-Issue-Assignee: matz X-Redmine-Sender: nobu 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS5DpXCOxZcpzD8dcWtePbrmiDH7nFZDmy3lou uWK8aXfR9RHwasgCQFIcgbGyOtOTVLVEuyWpRftpftiIbXZDxuRmxNRMaB52lkRUybP9w3T/KCfdPY ugpKhNygM9SkjIg1IKSypqO8KXVzWq/p/G3u X-ML-Name: ruby-core X-Mail-Count: 71325 Subject: [ruby-core:71325] [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 Nobuyoshi Nakada. Thomas Sawyer wrote: > `..` wouldn't work. But that reminds me. Was `!` ever considered? > > u!profile!thumbnails!large No, it's a unary operator. ---------------------------------------- Feature #11537: Introduce "Safe navigation operator" https://bugs.ruby-lang.org/issues/11537#change-54700 * 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/