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=-2.7 required=3.0 tests=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_HELO_NONE,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 6D36C1F454 for ; Mon, 11 Nov 2019 15:08:12 +0000 (UTC) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 64660120A21; Tue, 12 Nov 2019 00:08:02 +0900 (JST) Received: from xtrwkhkc.outbound-mail.sendgrid.net (xtrwkhkc.outbound-mail.sendgrid.net [167.89.16.28]) by neon.ruby-lang.org (Postfix) with ESMTPS id BA27E120A1E for ; Tue, 12 Nov 2019 00:07:59 +0900 (JST) Received: by filter0104p3las1.sendgrid.net with SMTP id filter0104p3las1-5636-5DC97955-B4 2019-11-11 15:08:05.453850277 +0000 UTC m=+321713.740587664 Received: from herokuapp.com (unknown [35.171.185.2]) by ismtpd0050p1iad1.sendgrid.net (SG) with ESMTP id ihUFrMvMRmGgODlQj5rFag for ; Mon, 11 Nov 2019 15:08:05.420 +0000 (UTC) Date: Mon, 11 Nov 2019 15:08:05 +0000 (UTC) From: zverok.offline@gmail.com Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 71415 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 16341 X-Redmine-Issue-Author: Nondv X-Redmine-Sender: zverok 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?3be0g8093pjUjT94eiCA64csFDBI=2FmHQTWm54P5gda5RnpNLlh8zE1u95f8X9x?= =?us-ascii?Q?ENQBBKYJdgNj9YJBfozzsu7pEKhsds4b=2F4zweqm?= =?us-ascii?Q?gHAOlDb0p0XXHm9VIopfxAyzld6hCJo9ZlLmBxU?= =?us-ascii?Q?LmeTfHRKibdqm+t5CyEGY0YkNxTjl+0c9D+cDij?= =?us-ascii?Q?agJzZAQxQrfCEPdyV048HhS1tl2P7eW5QEQ=3D=3D?= To: ruby-core@ruby-lang.org X-ML-Name: ruby-core X-Mail-Count: 95790 Subject: [ruby-core:95790] [Ruby master Feature#16341] Proposal: Set#to_proc 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 #16341 has been updated by zverok (Victor Shepelev). Since 2.5, `Set` implements `#===`, so you can just: ```ruby (1..10).grep_v(banned_numbers) # => [1, 2, 3, 4, 6, 8, 10] ``` which is pretty clear and probably more effective than proc conversion. ---------------------------------------- Feature #16341: Proposal: Set#to_proc https://bugs.ruby-lang.org/issues/16341#change-82611 * Author: Nondv (Dmitry Non) * Status: Open * Priority: Normal * Assignee: * Target version: ---------------------------------------- ``` ruby class Set def to_proc -> (x) { include?(x) } # or method(:include?).to_proc end end ``` Usage: ```ruby require 'set' banned_numbers = Set[0, 5, 7, 9] (1..10).reject(&banned_numbers) # ===> [1, 2, 3, 4, 6, 8, 10] ``` -- https://bugs.ruby-lang.org/