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 940C519C0036 for ; Wed, 4 Nov 2015 08:33:01 +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 A7F90B5D828 for ; Wed, 4 Nov 2015 09:01:47 +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 8D05395241E for ; Wed, 4 Nov 2015 09:01:47 +0900 (JST) Received: from [221.186.184.76] (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id D4F441204DF; Wed, 4 Nov 2015 09:01:45 +0900 (JST) X-Original-To: ruby-core@ruby-lang.org Delivered-To: ruby-core@ruby-lang.org Received: from o10.shared.sendgrid.net (o10.shared.sendgrid.net [173.193.132.135]) by neon.ruby-lang.org (Postfix) with ESMTPS id 93DD61204CB for ; Wed, 4 Nov 2015 09:01:42 +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=DloLdc7NCJ9ULIweSM+t5P7gdSk=; b=QYGPU5cUDoLhQuclTi hzuLJVjDT6/wPYqNM+mPfTz1J4Lu040BMtsGAglDrYHtp556B42yOw7P3QhAHnf4 jpAH9/GW0Lot87+Ip1JaPmFXQYK/ZiJ10wHNoROuPACwXNJrZ0PhRurCIV2F8P50 IHTP9MGdEsh4QT3oLBmQm8rE4= Received: by filter0562p1mdw1.sendgrid.net with SMTP id filter0562p1mdw1.21587.56394ACD7F 2015-11-04 00:01:17.764833046 +0000 UTC Received: from herokuapp.com (ec2-54-161-195-124.compute-1.amazonaws.com [54.161.195.124]) by ismtpd0003p1iad1.sendgrid.net (SG) with ESMTP id c8Z03G0PQ-ybT3opzVLIWA for ; Wed, 04 Nov 2015 00:01:17.664 +0000 (UTC) Date: Wed, 04 Nov 2015 00:01:17 +0000 From: transfire@gmail.com 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: 45962 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 11537 X-Redmine-Issue-Author: hsbt X-Redmine-Issue-Assignee: matz X-Redmine-Sender: trans 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS6SLrmKN3zqLldg5a1mJ++IH1Dk9z9Zd0XuVo Ew1pvRH6McREOfwg/Hf7jnwbm9UnZXYU0uV+0F7wVZDB2I/DArbXxW2bFgV+wQSD4kxdvjszVz2WPN 7SKrldxmgucZBQbWMwGq8BFXYLg8hFB4tbHb X-ML-Name: ruby-core X-Mail-Count: 71322 Subject: [ruby-core:71322] [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 Thomas Sawyer. Laurentiu Macovei wrote: > The same discussion happens to be on TypeScript and ES6 worlds. > Using `..` instead of `?.` or `.?` because it's way more clear when you are using the ternary `? :` operator on the same line. > > If it's not a conflict in Ruby syntax perhaps worths looking at `..` wouldn't work. But that reminds me. Was `!` ever considered? u!profile!thumbnails!large ---------------------------------------- Feature #11537: Introduce "Safe navigation operator" https://bugs.ruby-lang.org/issues/11537#change-54697 * 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/