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=-4.1 required=3.0 tests=BAYES_00, 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 86DB81F462 for ; Wed, 22 May 2019 06:07:01 +0000 (UTC) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 9D34E1209F2; Wed, 22 May 2019 15:06:56 +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 0555A1209F2 for ; Wed, 22 May 2019 15:06:54 +0900 (JST) Received: by filter0038p3iad2.sendgrid.net with SMTP id filter0038p3iad2-13192-5CE4E700-D 2019-05-22 06:06:56.442291518 +0000 UTC m=+545241.916686681 Received: from herokuapp.com (unknown [3.81.19.97]) by ismtpd0037p1iad2.sendgrid.net (SG) with ESMTP id DtXr3s2OTseq1p-eJk3t6A for ; Wed, 22 May 2019 06:06:56.353 +0000 (UTC) Date: Wed, 22 May 2019 06:06:56 +0000 (UTC) From: matz@ruby.or.jp Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 68249 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 15323 X-Redmine-Issue-Author: alfonsojimenez 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: =?us-ascii?Q?bXEIHGfdFwsIlBTndiToCp=2Fmc2rfxRD2sZAksRKJIHXR1ov2ExUjyh2Rf3B5Ol?= =?us-ascii?Q?KCRxMY1qy=2F8tmyB1+W+04gleo=2FISs7m6nDb+i7M?= =?us-ascii?Q?981W0asXTUxvtejFVVnU9ricS0Or3+n8clAMG6c?= =?us-ascii?Q?XKz7t+3j1aFy44auuVkrha3g5oAAMl3RXX6VSEB?= =?us-ascii?Q?2QwgCoHgWc2dp?= To: ruby-core@ruby-lang.org X-ML-Name: ruby-core X-Mail-Count: 92764 Subject: [ruby-core:92764] [Ruby trunk 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 matz (Yukihiro Matsumoto). I accepted the proposal at the last developer meeting but forgot to post he= re. I do reject having both block and block argument at the same time. [ruby-co= re:92505] Regarding `filter_map!`, submit a new proposal, if you really needed (with = the use-case). Matz. ---------------------------------------- Feature #15323: [PATCH] Proposal: Add Enumerable#filter_map https://bugs.ruby-lang.org/issues/15323#change-78128 * Author: alfonsojimenez (Alfonso Jim=E9nez) * Status: Open * 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: