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=0.5 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, RCVD_IN_SBL_CSS,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 806631F4C0 for ; Fri, 11 Oct 2019 02:34:11 +0000 (UTC) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id D12B6120959; Fri, 11 Oct 2019 11:34:01 +0900 (JST) Received: from o1678948x4.outbound-mail.sendgrid.net (o1678948x4.outbound-mail.sendgrid.net [167.89.48.4]) by neon.ruby-lang.org (Postfix) with ESMTPS id 527261208AC for ; Fri, 11 Oct 2019 11:33:59 +0900 (JST) Received: by filter0163p3mdw1.sendgrid.net with SMTP id filter0163p3mdw1-20217-5D9FEA19-43 2019-10-11 02:34:01.69059752 +0000 UTC m=+102346.265121723 Received: from herokuapp.com (unknown [3.81.184.91]) by ismtpd0043p1mdw1.sendgrid.net (SG) with ESMTP id v85HP9FnTjqINyrXXfVucA for ; Fri, 11 Oct 2019 02:34:01.658 +0000 (UTC) Date: Fri, 11 Oct 2019 02:34:01 +0000 (UTC) From: joshua.goodall@gmail.com Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 70887 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 15323 X-Redmine-Issue-Author: alfonsojimenez X-Redmine-Sender: inopinatus 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?wGpmiQMnTvCwgEKpkqO3LXyOzWukGMSWNpYZRPwEvhB1tUBYBBbBNnOSF3dWR8?= =?us-ascii?Q?KroULe8Nq7N7cGTXlxQDqRiG23dduFkm0gl73Io?= =?us-ascii?Q?YvnQ3HgMrHF1ssANqL9QCVRTDtSRe8g4kENz0oU?= =?us-ascii?Q?Tlx3cGEiNpnsSUATstk8HG39QMdXhQjA8p4+9Dr?= =?us-ascii?Q?NL41FA78zwkJMbXTU=2FUBuCwm5fHq9RSc20Q=3D=3D?= To: ruby-core@ruby-lang.org X-ML-Name: ruby-core X-Mail-Count: 95300 Subject: [ruby-core:95300] [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 inopinatus (Joshua GOODALL). Could this take argument as well? I'd be keen for something in the spirit = of `Enumerable#grep` but where an (optional) pattern evaluates the result o= f the block, rather than each element of the array. If omitted, there's th= e default test. I'd love to be able to write `bottles.filter_map(18.., &:age)` or `dependen= cies.filter_map(/GPL/) { |lib| lib.license.name.upcase }`. ---------------------------------------- Feature #15323: [PATCH] Proposal: Add Enumerable#filter_map https://bugs.ruby-lang.org/issues/15323#change-81984 * 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: