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,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 5487F1F4C0 for ; Wed, 23 Oct 2019 06:45:34 +0000 (UTC) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 8FBD7120A56; Wed, 23 Oct 2019 15:45:24 +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 1327D120A43 for ; Wed, 23 Oct 2019 15:45:22 +0900 (JST) Received: by filter0186p3mdw1.sendgrid.net with SMTP id filter0186p3mdw1-13118-5DAFF705-68 2019-10-23 06:45:25.925731284 +0000 UTC m=+115494.691067788 Received: from herokuapp.com (unknown [52.91.158.104]) by ismtpd0054p1mdw1.sendgrid.net (SG) with ESMTP id rz_OL-xLQ-eKiJSrX9TIYA for ; Wed, 23 Oct 2019 06:45:25.828 +0000 (UTC) Date: Wed, 23 Oct 2019 06:45:25 +0000 (UTC) From: nobu@ruby-lang.org Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 71082 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 16273 X-Redmine-Issue-Author: osyo X-Redmine-Sender: nobu 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?q8Dly+pU2+3ektTtZVXgZtbJPXwqo7p86jCsvYTW4BzrPjF5CObWdG6ET=2FSEsk?= =?us-ascii?Q?J5vKG4ui=2F6M3MIYb1W=2FvVue9LrAYPzcBDIjZ=2FhY?= =?us-ascii?Q?fq24CJ7irtzUqqqmZfedLJVr5XoGJA43SgCXC9D?= =?us-ascii?Q?Gr=2FcVGbQDS7pZwFwobbJNOp0KbC8JKj=2FeMWRMYC?= =?us-ascii?Q?h2BDIdfS3iUUWbuwaKuo+MUKXkYvg90KvRw=3D=3D?= To: ruby-core@ruby-lang.org X-ML-Name: ruby-core X-Mail-Count: 95490 Subject: [ruby-core:95490] [Ruby master Feature#16273] Proposal: Shorthand operator for "#instance_method" 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 #16273 has been updated by nobu (Nobuyoshi Nakada). I don't think using `#` acceptable, and have thought `.::`. ---------------------------------------- Feature #16273: Proposal: Shorthand operator for "#instance_method" https://bugs.ruby-lang.org/issues/16273#change-82261 * Author: osyo (manga osyo) * Status: Open * Priority: Normal * Assignee: * Target version: ---------------------------------------- hi, created issues to discuss shorthand for "#instance_method" ## Overview Ruby 2.7 adds a `#method` shorthand `.:` operator. * [Feature #12125: Proposal: Shorthand operator for Object#method - Ruby master - Ruby Issue Tracking System](https://bugs.ruby-lang.org/issues/12125) * [Feature #13581: Syntax sugar for method reference - CommonRuby - Ruby Issue Tracking System](https://bugs.ruby-lang.org/issues/13581) In this issues want to discuss the shorthand operator for "#instance_method". ## Background If you want to pass an array to `Array#zip` or `Hash#merge` as shown below, the code will be messy. ```ruby arrays = [["a", "b"], ["c"], ["d", "e"]] hashs = [{"a" => 1}, {"b" => 2, "c" => 3}, {"d" => 4, "e" => 5}] # `#first` must be a receiver and the value excluding `#first` must be passed as an argument arrays.first.zip(*arrays.drop(1)) arrays.first.product(*arrays.drop(1)) hashs.first.merge(*hashs.drop(1)) ``` This can be solved by using `# bind_call` ([# 15955] (https://bugs.ruby-lang.org/issues/15955)). ```ruby arrays = [["a", "b"], ["c"], ["d", "e"]] hashs = [{"a" => 1}, {"b" => 2, "c" => 3}, {"d" => 4, "e" => 5}] Array.instance_method(:zip).bind_call(*arrays) Array.instance_method(:product).bind_call(*arrays) Hash.instance_method(:merge).bind_call(*hashs) ``` But `#instance_method` is long. I'm thinking shorthand operator for `#instance_method`. :MEMO: There was a suggestion to add `Array.zip` or `Array.product` in the past * [Feature #8970: Array.zip and Array.product - Ruby master - Ruby Issue Tracking System](https://bugs.ruby-lang.org/issues/8970) * [Feature #6499: Array::zip - Ruby master - Ruby Issue Tracking System](https://bugs.ruby-lang.org/issues/6499) * [Feature #7444: Array#product_set - Ruby master - Ruby Issue Tracking System](https://bugs.ruby-lang.org/issues/7444) ## Proposal new operator I can't come up with a suitable operator yet, sorry... However, considering the `.:` operator, I think "operator + Symbol (`:`)" is good. ```ruby # Document-like writing # `#` + operator Array#zip Array.#zip Array#:zip # Constant-link writing # :: + :hoge Array:::zip Array::#zip ``` Also, the following syntax is valid at this time, so it may be difficult to adopt. ```ruby Array!zip Array@zip Array&zip Array:zip ``` Please comment if you are interested in the shorthand operator for `# instance_method`. * Other `#instance_method` usecase * Proposal shorthand operator * etc... Thank you! :) -- https://bugs.ruby-lang.org/