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 6C51717CC9C7 for ; Mon, 20 Apr 2015 10:20:48 +0900 (JST) Received: from funfun.nagaokaut.ac.jp (smtp.nagaokaut.ac.jp [133.44.2.201]) by kankan.nagaokaut.ac.jp (Postfix) with ESMTP id 957B5B5D8C0 for ; Mon, 20 Apr 2015 10:32:38 +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 B8C1A97A836 for ; Mon, 20 Apr 2015 10:32:39 +0900 (JST) X-Virus-Scanned: amavisd-new at nagaokaut.ac.jp Authentication-Results: funfun.nagaokaut.ac.jp (amavisd-new); dkim=fail (1024-bit key) reason="fail (message has been altered)" header.d=sendgrid.me 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 lY5CxZ9eb_em for ; Mon, 20 Apr 2015 10:32:39 +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 8D9CD97A832 for ; Mon, 20 Apr 2015 10:32:39 +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 70F48952439 for ; Mon, 20 Apr 2015 10:32:38 +0900 (JST) Received: from [221.186.184.76] (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id F1FBA120495; Mon, 20 Apr 2015 10:32:36 +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 3AA38120434 for ; Mon, 20 Apr 2015 10:32:33 +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=P5IbQGWEG6mM+fG3sdRbou1yzGU=; b=eCou8mZgSp3jGv4rTE NzSezwaTFJIfq3drrKw6PM/1+VOdqrBI3m9wgXMX7oTQd8M77VevSHlVdekgdI02 JBn82qdcmIM0Yj4xq8bvp/FcO6BA37+l7yECyOV11lqzlF+QycHV9PJhBdtqHCLC msRxX51UN9+E5vd5qa/ft4Omc= Received: by filter0125p1mdw1.sendgrid.net with SMTP id filter0125p1mdw1.31172.5534572C6 2015-04-20 01:32:29.569416973 +0000 UTC Received: from herokuapp.com (ec2-54-80-1-149.compute-1.amazonaws.com [54.80.1.149]) by ismtpd-014 (SG) with ESMTP id 14cd474895c.2001.ea61f Mon, 20 Apr 2015 01:32:29 +0000 (UTC) Date: Mon, 20 Apr 2015 01:32:29 +0000 From: shevegen@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: quoted-printable X-Redmine-MailingListIntegration-Message-Ids: 43333 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 11076 X-Redmine-Issue-Author: haraldb X-Redmine-Sender: shevegen X-Mailer: Redmine X-Redmine-Host: bugs.ruby-lang.org X-Redmine-Site: Ruby Issue Tracking System X-Auto-Response-Suppress: OOF Auto-Submitted: auto-generated X-SG-EID: ync6xU2WACa70kv/Ymy4QrNMhiuLXJG8OTL2vJD1yS5+dpjlUkQFjVl74l+ua4cMVtxtd0Dqditt1Z IppHn+gViDZnt6TPV5XfFGBQ48z/Vgm4RlXt+K6lO8mfDfpAjQB14b5TxGnZNyh0u2KJekbL82JRl1 OWMg5FQWEofKHwyEdjvVja1mzAbr6DyAt2OJ X-ML-Name: ruby-core X-Mail-Count: 68933 Subject: [ruby-core:68933] [Ruby trunk - Feature #11076] Enumerable method count_by 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 #11076 has been updated by Robert A. Heiler. Can you also add a sentence or two for documentation? :-) It may lower the entry barrier for adding a method such as the above (I ass= ume it must be documented by someone before it could be added). ---------------------------------------- Feature #11076: Enumerable method count_by https://bugs.ruby-lang.org/issues/11076#change-52197 * Author: Harald B=C3=B6ttiger * Status: Open * Priority: Low * Assignee:=20 ---------------------------------------- I very often use `Hash[array.group_by{|x|x}.map{|x,y|[x,y.size]}]`. Would be nice with to have a method called `count_by`: array =3D ['aa', 'aA', 'bb', 'cc'] p array.count_by(&:downcase) #=3D> {'aa'=3D>2,'bb'=3D>1,'cc'=3D>1} --=20 https://bugs.ruby-lang.org/