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 A4DF819E002D for ; Sun, 20 Dec 2015 07:11:31 +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 D7627B5D834 for ; Sun, 20 Dec 2015 07:43:43 +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 0C5E918CC7B2 for ; Sun, 20 Dec 2015 07:43:43 +0900 (JST) Received: from [221.186.184.76] (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id C80D312051C; Sun, 20 Dec 2015 07:43:41 +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 122B41204B4 for ; Sun, 20 Dec 2015 07:43:38 +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=B2agUnrRX7CLKWwQyjeuWycPbDY=; b=sqCPCtx9QcfQfI2GX8 8vmcE3dLRbPLtzIKXzTCje323FxM5O1862BZm+kWFbZx3E8uyQG2pUn1HqFLUEI8 d+vUNZlbcQAf22c6dkuqyQY+THHrsDB4iX9ti3me0qsKLD8mlQ3ppFd3BAdR/noF P6c8DMckDhnwGwSope+3QMt9A= Received: by filter0840p1mdw1.sendgrid.net with SMTP id filter0840p1mdw1.7990.5675DD9119 2015-12-19 22:43:29.644166821 +0000 UTC Received: from herokuapp.com (ec2-184-73-7-252.compute-1.amazonaws.com [184.73.7.252]) by ismtpd0004p1iad1.sendgrid.net (SG) with ESMTP id kzp6IrdiQyCk2bZS-QjvVA Sat, 19 Dec 2015 22:43:29.911 +0000 (UTC) Date: Sat, 19 Dec 2015 22:43:29 +0000 From: eregontp@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: 46990 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 11848 X-Redmine-Issue-Author: prodis X-Redmine-Issue-Assignee: matz X-Redmine-Sender: Eregon 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS5212ZA2Oi/g40kyUg5PIdLsGBccZAMbiNM2g EOytxwINXrMi1gKLCPGM1HGefg3qfNOy900Viy3/65Uj0sIpyz5BxWRKi+hgyQNBuaaiirRznuWLGM cBwbwj9jAQHu9Diphl2PpZHJaYGGbgoSgkBuU7+J+B+fc3T1tQFJ4Opt2Q== X-ML-Name: ruby-core X-Mail-Count: 72395 Subject: [ruby-core:72395] [Ruby trunk - Feature #11848] New #to_b method for String, Symbol, Numeric, NilClass, TrueClass and FalseClass. 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 #11848 has been updated by Benoit Daloze. I like the idea of having explicit conversion between booleans/integers, such that 0.to_b => false and true.to_i => 1. !int.zero? can be a workaround for the first conversion but I only see a ternary condition for the second case. Also, nil.to_i is already 0. ---------------------------------------- Feature #11848: New #to_b method for String, Symbol, Numeric, NilClass, TrueClass and FalseClass. https://bugs.ruby-lang.org/issues/11848#change-55682 * Author: Fernando Hamasaki de Amorim * Status: Rejected * Priority: Normal * Assignee: Yukihiro Matsumoto ---------------------------------------- New ***to_b*** method converts **strings**, **symbols**, **numbers** and **nil** values in a **boolean** value. ***to_b*** method is available on ***String***, ***Symbol***, ***Numeric***, ***TrueClass***, ***FalseClass*** and ***NilClass*** classes. ## String Returns ***true*** if string is one of **t**, **true**, **on**, **y**, **yes** or **1** values. Returns ***false*** otherwise. Ignores trailing spaces and letter cases. ~~~ruby 't'.to_b # => true 'true'.to_b # => true 'on'.to_b # => true 'y'.to_b # => true 'yes'.to_b # => true '1'.to_b # => true ''.to_b # => false '0'.to_b # => false '2'.to_b # => false '-1'.to_b # => false 'f'.to_b # => false 'false'.to_b # => false 'off'.to_b # => false 'n'.to_b # => false 'no'.to_b # => false 'wherever'.to_b # => false ~~~ ## Symbol Same as ***symbol.to_s.to_b***. ~~~ruby :'1'.to_b # => true :t.to_b # => true :true.to_b # => true :on.to_b # => true :y.to_b # => true :yes.to_b # => true :f.to_b # => false :false.to_b # => false :off.to_b # => false :n.to_b # => false :no.to_b # => false :wherever.to_b # => false ~~~ ## Numeric Returns ***false*** if number is **zero**. Returns ***true*** otherwise. ### Integer ~~~ruby 0.to_b # => false 1.to_b # => true 2.to_b # => true -1.to_b # => true -2.to_b # => true ~~~ ### Float ~~~ruby 0.0.to_b # => false 0.1.to_b # => true 1.0.to_b # => true -0.1.to_b # => true -1.0.to_b # => true ~~~ ### BigDecimal ~~~ruby require 'bigdecimal' BigDecimal('0.0').to_b # => false BigDecimal('0.1').to_b # => true BigDecimal('1.0').to_b # => true BigDecimal('-0.1').to_b # => true BigDecimal('-1.0').to_b # => true ~~~ ## NilClass Returns ***false***. ~~~ruby nil.to_b # => false ~~~ ## TrueClass Returns ***true***. ~~~ruby true.to_b # => true ~~~ ## FalseClass Returns ***false***. ~~~ruby false.to_b # => false ~~~ ---Files-------------------------------- to_b_method.diff (9.63 KB) -- https://bugs.ruby-lang.org/