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 AFACE19C0008 for ; Thu, 8 Oct 2015 01:27:49 +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 91EC0B5D896 for ; Thu, 8 Oct 2015 01:53:04 +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 6B3E6952439 for ; Thu, 8 Oct 2015 01:53:02 +0900 (JST) Received: from [221.186.184.76] (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 443E712073D; Thu, 8 Oct 2015 01:53:01 +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 353EB1204D0 for ; Thu, 8 Oct 2015 01:52:58 +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=NaihuvXugKdu83hVviKHYTcBP2c=; b=FtOzzH6iqiaaOAxny+ xxe7pen5q13qoe9L4XcAfWbyoLTxJqvEFlWKpWRkg/s1UbOrQKP8VfclzjwdHGS2 Xc9VP9qIps9tpNk6nUXh8XYJRRmxS5ZEGecBabq4954iIWmeaxbyD0NX1cw3pYqg qxe8I1x9i+kCYyagLyVLxSaxQ= Received: by filter0855p1mdw1.sendgrid.net with SMTP id filter0855p1mdw1.11898.56154DAB1 2015-10-07 16:51:55.010538939 +0000 UTC Received: from herokuapp.com (ec2-54-145-171-9.compute-1.amazonaws.com [54.145.171.9]) by ismtpd0004p1iad1.sendgrid.net (SG) with ESMTP id icQ_B8WMQeazhCuViPX1jA for ; Wed, 07 Oct 2015 16:51:55.148 +0000 (UTC) Date: Wed, 07 Oct 2015 16:51:55 +0000 From: sawadatsuyoshi@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: 45632 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 11537 X-Redmine-Issue-Author: hsbt X-Redmine-Issue-Assignee: matz X-Redmine-Sender: sawa 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS4chDExcKXZvyLTUfteux9S7Z/Zqt1I54Fp4u xklfJ8mXQ7tb7l82OETMNAUPpOAhQmXMpxr+E5lyA3F+Nn+JZ+HeNUPJSHwuzJfX4YqW97zj1GtlVM nNLS0vL58qgkU7WkiO7f60lu09GuLiVBOaGG X-ML-Name: ruby-core X-Mail-Count: 71015 Subject: [ruby-core:71015] [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 Tsuyoshi Sawada. The `&&` and `try` are different. I am considering the `&&` version. Since we already have: a &&= b which means a = a && b By analogy from the above, and given that we want a && a.b what about: a.&&b or more shortly: a.&b ---------------------------------------- Feature #11537: Introduce "Safe navigation operator" https://bugs.ruby-lang.org/issues/11537#change-54389 * Author: Hiroshi SHIBATA * Status: Open * 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/