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 D92E919C0036 for ; Mon, 26 Oct 2015 19:54:55 +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 18505B5D834 for ; Mon, 26 Oct 2015 20:22:35 +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 0362D952439 for ; Mon, 26 Oct 2015 20:22:34 +0900 (JST) Received: from [221.186.184.76] (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 8FC78120459; Mon, 26 Oct 2015 20:22:32 +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 020CF120420 for ; Mon, 26 Oct 2015 20:22:28 +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=7G8L5cyWVR52kgoE+GHg2BPlk5w=; b=HNFyDYuCvNHballgtI a4eGL65zPgtw8rPdDte2ZjCTPhaR9bXMSw4ia7fLaQAxnFmbgTA3cigqEZxLWHcD 3M+2S1L9h1OxtLSMKNAl2qnV8/F3dXUYGCcVNpcgD/DBO+IKr13AY0hzvuEBHClY L7stbFX0Yay2SCSqzVhgP+khE= Received: by filter0594p1mdw1.sendgrid.net with SMTP id filter0594p1mdw1.22858.562E0CDA3D 2015-10-26 11:22:02.149359939 +0000 UTC Received: from herokuapp.com (ec2-54-90-98-226.compute-1.amazonaws.com [54.90.98.226]) by ismtpd0006p1iad1.sendgrid.net (SG) with ESMTP id l73Xu8PYSyOiCIEenocqYQ for ; Mon, 26 Oct 2015 11:22:02.455 +0000 (UTC) Date: Mon, 26 Oct 2015 11:22:02 +0000 From: garysweaver@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: 45811 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 11537 X-Redmine-Issue-Author: hsbt X-Redmine-Issue-Assignee: matz X-Redmine-Sender: garysweaver 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS4iAGBmff0wK1+RUNl4N2Vv9+QDpLVn/qB9YW c+1zgSSQg8mKnshu0GRyyteQRc0o1HfaTSFM7uvBlOXAFSfj4M3qOoslHUPvwJ4L2za8cOzSA6BlAh 7AOSsvgNCTknYl4YOTb6FxDUO2ZWVhO+XRnk X-ML-Name: ruby-core X-Mail-Count: 71184 Subject: [ruby-core:71184] [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 Gary Weaver. Thomas Sawyer wrote: > u ? .profile ? .thumbnails ? .large : default No, because then you can't do this, which is valid in current Ruby: a = b = c = d = e = false g = true a ? b ? c : d : e ? f : g => true ---------------------------------------- Feature #11537: Introduce "Safe navigation operator" https://bugs.ruby-lang.org/issues/11537#change-54564 * 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/