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 582FE17D011C for ; Thu, 6 Jun 2013 17:25:23 +0900 (JST) Received: from funfun.nagaokaut.ac.jp (funfun.nagaokaut.ac.jp [133.44.2.201]) by kankan.nagaokaut.ac.jp (Postfix) with ESMTP id 5AE24EA6A9A for ; Thu, 6 Jun 2013 16:59:44 +0900 (JST) Received: from funfun.nagaokaut.ac.jp (localhost.nagaokaut.ac.jp [127.0.0.1]) by funfun.nagaokaut.ac.jp (Postfix) with ESMTP id 8701397A827 for ; Thu, 6 Jun 2013 16:59:44 +0900 (JST) X-Virus-Scanned: amavisd-new at nagaokaut.ac.jp Received: from funfun.nagaokaut.ac.jp ([127.0.0.1]) by funfun.nagaokaut.ac.jp (funfun.nagaokaut.ac.jp [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id QtF0PABqEK7g for ; Thu, 6 Jun 2013 16:59:44 +0900 (JST) Received: from voscc.nagaokaut.ac.jp (voscc.nagaokaut.ac.jp [133.44.1.100]) by funfun.nagaokaut.ac.jp (Postfix) with ESMTP id 6636197A820 for ; Thu, 6 Jun 2013 16:59:44 +0900 (JST) Received: from carbon.ruby-lang.org (carbon.ruby-lang.org [221.186.184.68]) by voscc.nagaokaut.ac.jp (Postfix) with ESMTP id 22E4A952408 for ; Thu, 6 Jun 2013 16:59:41 +0900 (JST) Received: from beryllium.ruby-lang.org (beryllium.ruby-lang.org [127.0.0.1]) by carbon.ruby-lang.org (Postfix) with ESMTP id 8CD493C21E221; Thu, 6 Jun 2013 16:59:40 +0900 (JST) Received: from fluorine.ruby-lang.org (www.rubyist.net [210.251.121.216]) by carbon.ruby-lang.org (Postfix) with ESMTP id 31B473C21E7D6 for ; Thu, 6 Jun 2013 16:59:40 +0900 (JST) Received: from ruby-lang.org (localhost [127.0.0.1]) by fluorine.ruby-lang.org (Postfix) with ESMTP id 22E942400C for ; Thu, 6 Jun 2013 16:59:40 +0900 (JST) Delivered-To: ruby-core@ruby-lang.org Date: Thu, 6 Jun 2013 16:59:40 +0900 Posted: Thu, 6 Jun 2013 16:59:40 +0900 From: "nobu (Nobuyoshi Nakada)" Reply-To: ruby-core@ruby-lang.org Subject: [ruby-core:55336] [ruby-trunk - Feature #8499] Importing Hash#slice, Hash#slice!, Hash#except, and Hash#except! from ActiveSupport To: ruby-core@ruby-lang.org Message-Id: References: X-ML-Name: ruby-core X-Mail-Count: 55336 X-MLServer: fml [fml 4.0.3 release (20011202/4.0.3)]; post only (only members can post) X-ML-Info: If you have a question, send e-mail with the body "help" (without quotes) to the address ruby-core-ctl@ruby-lang.org; help= X-Mailer: Redmine X-Redmine-Issue-Author: mrkn X-Redmine-Issue-Assignee: matz X-Auto-Response-Suppress: OOF X-Redmine-Issue-Id: 8499 X-Redmine-Mailinglistintegration-Message-Ids: 28682 X-Redmine-Project: ruby-trunk Auto-Submitted: auto-generated X-Redmine-Site: Ruby Issue Tracking System X-Redmine-Host: bugs.ruby-lang.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Precedence: bulk List-Id: ruby-core.ruby-lang.org List-Software: fml [fml 4.0.3 release (20011202/4.0.3)] List-Post: List-Owner: List-Help: List-Unsubscribe: Issue #8499 has been updated by nobu (Nobuyoshi Nakada). Or enhance the existing methods? ---------------------------------------- Feature #8499: Importing Hash#slice, Hash#slice!, Hash#except, and Hash#except! from ActiveSupport https://bugs.ruby-lang.org/issues/8499#change-39743 Author: mrkn (Kenta Murata) Status: Assigned Priority: Normal Assignee: matz (Yukihiro Matsumoto) Category: core Target version: current: 2.1.0 =begin RD According to my experiences, the following two idioms often appeare in application codes. (1) (({hash = other_hash.select { |k, | [:key1, :key2, :key3].include? k }})) (2) (({hash = other_hash.reject { |k, | [:key1, :key2, :key3].include? k }})) On Rails, they can be written in the following forms by using ActiveSupport's features. (1) (({hash = other_hash.slice(:key1, :key2, :key3)})) (2) (({hash = other_hash.except(:key1, :key2, :key3)})) I think the latter forms are shorter and more readable than the former ones. So I propose to import the following methods from ActiveSupport: * (({Hash#slice})) * (({Hash#slice!})) * (({Hash#except})) * (({Hash#except!})) =end -- http://bugs.ruby-lang.org/