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=-3.4 required=3.0 tests=BAYES_00,FROM_SUSPICIOUS_NTLD, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS shortcircuit=no autolearn=ham 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 4A9581F4BD for ; Sun, 6 Oct 2019 19:16:58 +0000 (UTC) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 302E9120966; Mon, 7 Oct 2019 04:16:46 +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 27325120965 for ; Mon, 7 Oct 2019 04:16:44 +0900 (JST) Received: by filter0150p3mdw1.sendgrid.net with SMTP id filter0150p3mdw1-30058-5D9A3D9E-26 2019-10-06 19:16:46.405385346 +0000 UTC m=+262494.112635411 Received: from herokuapp.com (unknown [34.201.109.215]) by ismtpd0061p1iad1.sendgrid.net (SG) with ESMTP id H2Te4IU0SxGcHZ81YlZIyA for ; Sun, 06 Oct 2019 19:16:46.400 +0000 (UTC) Date: Sun, 06 Oct 2019 19:16:46 +0000 (UTC) From: jonathan@hefner.pro Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 70835 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 15323 X-Redmine-Issue-Author: alfonsojimenez X-Redmine-Sender: jonathanhefner 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?y87fQmSTkDB0MB8oF=2FSr+wCExKhWErwiIVXChRtBifvM674ujUz+SoXuc5EW=2Fm?= =?us-ascii?Q?A0XuWTglBxH=2FoN3aiOMoGAxN49CnkvFYzXXFspb?= =?us-ascii?Q?5loq51IQpDyzhNDCmwBLwQIESxrW4tevhm+tEBp?= =?us-ascii?Q?+i3IhuUYdY0a9=2F2qpcmRJ07a7Va2jHwkfpu1RAs?= =?us-ascii?Q?jm=2FAeSxanCrgDjbWxKfBpVnqIWvcZlzhf4w=3D=3D?= To: ruby-core@ruby-lang.org X-ML-Name: ruby-core X-Mail-Count: 95248 Subject: [ruby-core:95248] [Ruby master Feature#15323] [PATCH] Proposal: Add Enumerable#filter_map 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="iso-8859-1" Content-Transfer-Encoding: quoted-printable Errors-To: ruby-core-bounces@ruby-lang.org Sender: "ruby-core" Issue #15323 has been updated by jonathanhefner (Jonathan Hefner). nobu (Nobuyoshi Nakada) wrote: > IIRC, at the last meeting (20190522), the conclusion was that this method= should select non-nil values only, like as `Array#compact`. > Am I correct? Checking master, it looks like this was not addressed. I agree it would be= more intuitive for `filter_map` to behave like `map{ ... }.compact`. Reje= cting `false` values seems like a "gotcha" / footgun. I have submitted a PR: https://github.com/ruby/ruby/pull/2530 ---------------------------------------- Feature #15323: [PATCH] Proposal: Add Enumerable#filter_map https://bugs.ruby-lang.org/issues/15323#change-81925 * Author: alfonsojimenez (Alfonso Jim=E9nez) * Status: Closed * Priority: Normal * Assignee: = * Target version: = ---------------------------------------- This is a proposal for a combined `filter` + `map` method (https://bugs.rub= y-lang.org/issues/5663). This method both filters and maps the elements of an enumerable in just one= iteration: ~~~ ruby (1..10).filter_map { |i| i * 2 if i.even? } #=3D> [4, 8, 12, 16, 20] ~~~ GitHub PR: https://github.com/ruby/ruby/pull/2017 = ---Files-------------------------------- 0001-Adding-Enumerable-filter_map.patch (4.61 KB) -- = https://bugs.ruby-lang.org/ Unsubscribe: