From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS4713 221.184.0.0/13 X-Spam-Status: No, score=-2.9 required=3.0 tests=AWL,BAYES_00, DKIM_ADSP_CUSTOM_MED,FORGED_GMAIL_RCVD,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED,SPF_PASS shortcircuit=no autolearn=no autolearn_force=no version=3.4.2 Received: from neon.ruby-lang.org (neon.ruby-lang.org [221.186.184.75]) by dcvr.yhbt.net (Postfix) with ESMTP id 0781B1F453 for ; Sun, 28 Apr 2019 21:03:45 +0000 (UTC) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 70D97120AA9; Mon, 29 Apr 2019 06:03:39 +0900 (JST) Received: from o1678916x28.outbound-mail.sendgrid.net (o1678916x28.outbound-mail.sendgrid.net [167.89.16.28]) by neon.ruby-lang.org (Postfix) with ESMTPS id 1BC651208EF for ; Mon, 29 Apr 2019 06:03:37 +0900 (JST) Received: by filter0089p3mdw1.sendgrid.net with SMTP id filter0089p3mdw1-23156-5CC6152A-C 2019-04-28 21:03:38.289077551 +0000 UTC m=+260450.984988834 Received: from herokuapp.com (unknown [54.91.45.152]) by ismtpd0036p1iad1.sendgrid.net (SG) with ESMTP id UdnjSpA8RgaNTlBglhaaqg for ; Sun, 28 Apr 2019 21:03:38.174 +0000 (UTC) Date: Sun, 28 Apr 2019 21:03:38 +0000 (UTC) From: eregontp@gmail.com Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 67952 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 15745 X-Redmine-Issue-Author: koic X-Redmine-Sender: Eregon 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: =?us-ascii?Q?KippOI8ZHtTweq7XfQzW93937kJ4QNWwSBuHnaMEcr34Ib+dhYKPevf+miGEIp?= =?us-ascii?Q?BsP5XSC3bFzhxT1AA=2FwmYfx0WZZP3k64VnKd6BZ?= =?us-ascii?Q?OHhpt41u0x9cfTGOhbE7Y2KPNJaZZ49tYmDUcI1?= =?us-ascii?Q?micHQjXgGfze+IbxmzJsXa+VnXm0tXpTs4Xk4P4?= =?us-ascii?Q?89Lm7B2=2FiH4jYx+3IWya=2FyihPxCn=2FOlvVng=3D=3D?= To: ruby-core@ruby-lang.org X-ML-Name: ruby-core X-Mail-Count: 92469 Subject: [ruby-core:92469] [Ruby trunk Bug#15745] There is no symmetry in the beginless range and the endless range using `Range#inspect` 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ruby-core-bounces@ruby-lang.org Sender: "ruby-core" Issue #15745 has been updated by Eregon (Benoit Daloze). mame (Yusuke Endoh) wrote: > a beginless range has only one use case (DSL-like usage) I'm not sure what you mean by DSL-like usage, but I wouldn't be surprised if many people use like `array[..-2]` (instead of `array[0..-2]`). In other words, I'd expect it's approximately as common as endless ranges for the purpose of indexing a sequence. ---------------------------------------- Bug #15745: There is no symmetry in the beginless range and the endless range using `Range#inspect` https://bugs.ruby-lang.org/issues/15745#change-77817 * Author: koic (Koichi ITO) * Status: Open * Priority: Normal * Assignee: * Target version: * ruby -v: ruby 2.7.0dev (2019-04-03 trunk 67423) [x86_64-darwin17] * Backport: 2.4: UNKNOWN, 2.5: UNKNOWN, 2.6: UNKNOWN ---------------------------------------- The following commit introduces beginless range. https://github.com/ruby/ruby/commit/95f7992b89efd35de6b28ac095c4d3477019c583 ``` % ruby -v ruby 2.7.0dev (2019-04-03 trunk 67423) [x86_64-darwin17] ``` There is no symmetry with endless range when using `Range#inspect` method. ``` (1..).inspect # => "1.." (..5).inspect # => "nil..5" ``` How about unifying whether it represents `nil`? -- https://bugs.ruby-lang.org/