From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Original-To: poffice@blade.nagaokaut.ac.jp Delivered-To: poffice@blade.nagaokaut.ac.jp Received: from kankan.nagaokaut.ac.jp (kankan.nagaokaut.ac.jp [133.44.2.24]) by blade.nagaokaut.ac.jp (Postfix) with ESMTP id 8974E19C0161 for ; Mon, 16 Nov 2015 01:01:09 +0900 (JST) Received: from voscc.nagaokaut.ac.jp (voscc.nagaokaut.ac.jp [133.44.1.100]) by kankan.nagaokaut.ac.jp (Postfix) with ESMTP id E2102B5D85E for ; Mon, 16 Nov 2015 01:31:26 +0900 (JST) Received: from neon.ruby-lang.org (neon.ruby-lang.org [221.186.184.75]) by voscc.nagaokaut.ac.jp (Postfix) with ESMTP id B407D18CC7B6 for ; Mon, 16 Nov 2015 01:31:26 +0900 (JST) Received: from [221.186.184.76] (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 39E7E1204F4; Mon, 16 Nov 2015 01:31:23 +0900 (JST) X-Original-To: ruby-core@ruby-lang.org Delivered-To: ruby-core@ruby-lang.org Received: from o2.heroku.sendgrid.net (o2.heroku.sendgrid.net [67.228.50.55]) by neon.ruby-lang.org (Postfix) with ESMTPS id E272B1204DE for ; Mon, 16 Nov 2015 01:31:18 +0900 (JST) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sendgrid.me; h=from:to:references:subject:mime-version:content-type:content-transfer-encoding:list-id; s=smtpapi; bh=n+HyNjxB88844G7a7jXgbkD6Xpo=; b=Cg62z3fGU+VRSFqfHI wpwf5pZg8m8RH+zHpSHZrP5yxmUX6WL6829AX4INhQBZWizRkbbudqCvkmFKn1rI 83ySupROqwiQE4l2Isl66YrNW7P09L/09B83yTyGkziQfBBBD1U9O/zkxrAB3bj2 bV3YmaNbJdR2FEsH4P/eguhTE= Received: by filter0596p1mdw1.sendgrid.net with SMTP id filter0596p1mdw1.14722.5648B33E28 2015-11-15 16:30:54.236734546 +0000 UTC Received: from herokuapp.com (ec2-54-158-241-164.compute-1.amazonaws.com [54.158.241.164]) by ismtpd0003p1iad1.sendgrid.net (SG) with ESMTP id TqBM42NUShm9eMn5FsAy9Q for ; Sun, 15 Nov 2015 16:30:54.384 +0000 (UTC) Date: Sun, 15 Nov 2015 16:30:54 +0000 From: 6ftdan@gmail.com To: ruby-core@ruby-lang.org Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Redmine-MailingListIntegration-Message-Ids: 46135 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 11690 X-Redmine-Issue-Author: danielpclark X-Redmine-Sender: danielpclark 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS6bGO5lAuDJH2ALHj2OAF606dFyIVBbt/0FEh uH8xAp2siVTqQP5lzNBAMZXmL91iRviOhVmnftCocAp3xwfAamXvABqWJuchPNSiImjvGX4v6svIO/ BtTWujbF571AahtTpJWDoPJyHuLv0mf2chSN X-SendGrid-Contentd-ID: {"test_id":"1447605055"} X-ML-Name: ruby-core X-Mail-Count: 71495 Subject: [ruby-core:71495] [Ruby trunk - Feature #11690] [Open] Update Hash during multiple assignment 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: , Errors-To: ruby-core-bounces@ruby-lang.org Sender: "ruby-core" Issue #11690 has been reported by Daniel P. Clark. ---------------------------------------- Feature #11690: Update Hash during multiple assignment https://bugs.ruby-lang.org/issues/11690 * Author: Daniel P. Clark * Status: Open * Priority: Normal * Assignee: ---------------------------------------- Given that we can assign multiple variables at once ~~~ruby a,b,c = 1,2,3 ~~~ It would be nice to be able to update a Hash during multiple assignment rather than replacing it. Currently ~~~ruby x = {a: 1, b: 2} x, y ,z = {c: 3}, 6, 7 x # => {c: 3} ~~~ What I propose is adding `Hash#update=` to permit updating during multiple assignment. ~~~ruby class Hash def update=(h) update(h) end end x = {a: 1, b: 2} x.update, y ,z = {c: 3}, 6, 7 x # => {a: 1, b: 2, c: 3} ~~~ This would be most useful in scenarios where a method or proc return multiple values. When the method returns the values we don't normally know the key outside where the hash assignment is. ~~~ruby example = proc { [{:hi => :hello}, 5] } hash = {} # Currently in Ruby with an Unknown key multiple assignment isn't an option hash[????], current = example.call # We currently have to two step it result, current = example.call hash.update(result) ~~~ But with `Hash#update=` we don't have to know the key. -- https://bugs.ruby-lang.org/