From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) 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=AWL,BAYES_00, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_PASS,T_RP_MATCHES_RCVD shortcircuit=no autolearn=no autolearn_force=no version=3.4.0 Received: from neon.ruby-lang.org (neon.ruby-lang.org [221.186.184.75]) by dcvr.yhbt.net (Postfix) with ESMTP id 7322F1FAE4 for ; Fri, 2 Feb 2018 08:37:24 +0000 (UTC) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id CCD82120A3B; Fri, 2 Feb 2018 17:37:22 +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 BBEEF120A10 for ; Fri, 2 Feb 2018 17:37:18 +0900 (JST) Received: by filter0021p3mdw1.sendgrid.net with SMTP id filter0021p3mdw1-27870-5A74233A-B 2018-02-02 08:37:14.105823916 +0000 UTC Received: from herokuapp.com (ec2-54-158-242-2.compute-1.amazonaws.com [54.158.242.2]) by ismtpd0049p1mdw1.sendgrid.net (SG) with ESMTP id bvbxHwc-R7WVjCL3OObzEA Fri, 02 Feb 2018 08:37:13.897 +0000 (UTC) Date: Fri, 02 Feb 2018 08:37:14 +0000 (UTC) From: hanmac@gmx.de To: ruby-core@ruby-lang.org Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 60619 X-Redmine-Project: common-ruby X-Redmine-Issue-Id: 13581 X-Redmine-Issue-Author: americodls X-Redmine-Sender: Hanmac 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS4ekSVogLHSZuhrDkwZdb7mZG3LDia+lnMomp xZQCBmXA8oYoqz4NtFjH9FHti/0sQymVus3fUVhlQHJgkK8uD23LPxRGFa+/TBTuphEC/yEeEJr7CJ TYG2wMx5GwW9L16bUZocUFcSveyQ/MwWANix X-ML-Name: ruby-core X-Mail-Count: 85342 Subject: [ruby-core:85342] [CommonRuby Feature#13581] Syntax sugar for method reference 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 #13581 has been updated by Hanmac (Hans Mackowiak). nobu (Nobuyoshi Nakada) wrote: > Hanmac (Hans Mackowiak) wrote: > > i don't know about the rubyVM but can `xyz(&method(:symbol))` or `xyz(&obj.method(:symbol))` be optimized like `xyz(&:symbol)` is? > > They have different meanings all. > > `xyz(&method(:symbol))` == `xyz {|x| symbol(x)}` > `xyz(&obj.method(:symbol))` == `xyz {|x| obj.symbol(x)}` > `xyz(&:symbol)` == `xyz {|x| x.symbol}` i know they are different meanings, i was just wondering if they can be optimized for the VM too, to make them run faster if able like with not creating extra ruby objects if not needed ---------------------------------------- Feature #13581: Syntax sugar for method reference https://bugs.ruby-lang.org/issues/13581#change-70127 * Author: americodls (Americo Duarte) * Status: Open * Priority: Normal * Assignee: * Target version: ---------------------------------------- Some another programming languages (even Java, in version 8) has a cool way to refer a method as a reference. I wrote some examples here: https://gist.github.com/americodls/20981b2864d166eee8d231904303f24b I miss this thing in ruby. I would thinking if is possible some like this: ~~~ roots = [1, 4, 9].map &Math.method(:sqrt) ~~~ Could be like this: ~~~ roots = [1, 4, 9].map Math->method ~~~ What do you guys thinking about it? -- https://bugs.ruby-lang.org/