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 7565A19C0024 for ; Tue, 27 Oct 2015 21:04:15 +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 B0094B5D895 for ; Tue, 27 Oct 2015 21:32:02 +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 BEC3895241E for ; Tue, 27 Oct 2015 21:32:02 +0900 (JST) Received: from [221.186.184.76] (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 57C30120492; Tue, 27 Oct 2015 21:32:02 +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 31F0A12047B for ; Tue, 27 Oct 2015 21:31:57 +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=3wRlrMunra3FtVhWJLy8Cl/bEXk=; b=eUhYVShC0yhBx2F9r2 NMYY+85Ti4NpoqMorWWPKAELBr7YtgVmiRfjRiJqFzNV8yvIHn5Eq34fZ/yGiTxr 4DWCMX9ebcTgUJNhjKJKZvka6zvTrRMJswciT3CkBHSj2eRAkOO2046S+LIGc7Bb 7Pglb/XHatF9dO/6GhWFNWlOQ= Received: by filter0569p1mdw1.sendgrid.net with SMTP id filter0569p1mdw1.3657.562F6EB833 2015-10-27 12:31:52.555184162 +0000 UTC Received: from herokuapp.com (ec2-54-91-44-38.compute-1.amazonaws.com [54.91.44.38]) by ismtpd0006p1iad1.sendgrid.net (SG) with ESMTP id e3iX3nYdQlO7L1oyYvUw_w for ; Tue, 27 Oct 2015 12:31:52.649 +0000 (UTC) Date: Tue, 27 Oct 2015 12:31:52 +0000 From: rr.rosas@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: 45847 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 11537 X-Redmine-Issue-Author: hsbt X-Redmine-Issue-Assignee: matz X-Redmine-Sender: rosenfeld 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS6Rx4GHt4Mp0KF1QYoJLiVSYlnezO1rvZ05vW IkyRWLXvK/7EsQFg/Lcpb4nHaxK37mPQ50+XdQ37ABasPwPXuA8HBTGJXZSEjuYn5TazW9VVIdGrXP zelsn79iUCUuQ3Zv81dMrE0chQ6tQOy5e2xY X-ML-Name: ruby-core X-Mail-Count: 71219 Subject: [ruby-core:71219] [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 Rodrigo Rosenfeld Rosas. Thanks for pointing me that. Everyday learning a new hidden feature from Ruby ;) ---------------------------------------- Feature #11537: Introduce "Safe navigation operator" https://bugs.ruby-lang.org/issues/11537#change-54599 * 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/