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 (smtp.nagaokaut.ac.jp [133.44.2.24]) by blade.nagaokaut.ac.jp (Postfix) with ESMTP id AD6351B40003 for ; Thu, 22 Dec 2016 00:34:12 +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 ACE1CB5D9D7 for ; Thu, 22 Dec 2016 01:04:04 +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 84BAF18CC871 for ; Thu, 22 Dec 2016 01:04:04 +0900 (JST) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 3A4C01206F0; Thu, 22 Dec 2016 01:04:02 +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 638751206E8 for ; Thu, 22 Dec 2016 01:03:59 +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=DreLPNVXzNHVXVWGkF03SZ+l9qQ=; b=A5nAvrguGGI4N1fOZE 1kV6yX6KwdvuXzjJKvMmuH4eBgbBv4IsIP12u4yYvJNAhomchQ5/UzUkg9BuS2fs TA+4Stilo+PZ28v8+zJEOpVmUsMbGP+Rcg2ojzzfcefs0InEx6bQjml194FRODD5 sKyy5F/aM90Wk2LjAPVkn94g4= Received: by filter1098p1mdw1.sendgrid.net with SMTP id filter1098p1mdw1-17656-585AA7EA-B 2016-12-21 16:03:54.162322 +0000 UTC Received: from herokuapp.com (ec2-54-158-111-208.compute-1.amazonaws.com [54.158.111.208]) by ismtpd0003p1iad1.sendgrid.net (SG) with ESMTP id 9AlDGosJRJ20S1hUEbA2xA Wed, 21 Dec 2016 16:03:51.762 +0000 (UTC) Date: Wed, 21 Dec 2016 16:03:50 +0000 From: matz@ruby-lang.org To: ruby-core@ruby-lang.org Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 53683 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 11286 X-Redmine-Issue-Author: 0x0dea X-Redmine-Issue-Assignee: matz X-Redmine-Sender: matz 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS7hAqOZoeG5ZIem85um6HGyGiMRyVmc3zCYAj xnho917V7PVDCpD4Efz45ahUgE4pWDIC+hDPDgK9ur6CMqq9vd2UMAxJZkJn4g1LD6wquLGJEbF7T3 kcGM+x/Ca1S1+6xaYHD8Hg7V8oSWmo6nC96yzSOOz+UTrDF0SfqdhQIOaw== X-ML-Name: ruby-core X-Mail-Count: 78787 Subject: [ruby-core:78787] [Ruby trunk Feature#11286] [PATCH] Add case equality arity to Enumerable's sequence predicates. 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 #11286 has been updated by Yukihiro Matsumoto. I am positive about the idea too. But as a duty of the final decision maker, I have to consider every option before the judgment. I see a few additional options. * takes optional argument that takes `===` (proposed) * takes optional keyword argument, `match:` for example * introduces another set of methods with different names Right now, I am wandering between option 1 and 2. Matz. ---------------------------------------- Feature #11286: [PATCH] Add case equality arity to Enumerable's sequence predicates. https://bugs.ruby-lang.org/issues/11286#change-62195 * Author: D.E. Akers * Status: Open * Priority: Normal * Assignee: Yukihiro Matsumoto * Target version: ---------------------------------------- ## Proposal It is proposed that `Enumerable`'s sequence predicates (`#all?`, `#any?`, `#none?`, and `#one?`) be augmented to return, in the case of a single argument, whether their query holds when each element is supplied to the argument's `#===` method. ## Rationale `Enumerable#grep` filters by case equality, allowing us to write very natural and expressive code: ```ruby strs.select { |str| /foo/ === str } strs.grep(/foo/) nums.select { |num| (5..10) === num } nums.grep(5..10) ``` In addition to taking advantage of the versatility of case equality, it lets us do away with the syntactic noise incurred by opening a block. `#grep` is a very nice method! Let's make `#all?` and friends more like `#grep`. ---Files-------------------------------- 0001-enum.c-add-case-equality-arity-to-sequence-predicates.patch (10 KB) case_equality_sequence_predicates-check_argc_before_deref.patch (10 KB) case_equality_sequence_predicates-all_updates.patch (9.94 KB) -- https://bugs.ruby-lang.org/