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 8A5DA19E0012 for ; Sat, 30 Jan 2016 10:30:13 +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 C094DB5D89F for ; Sat, 30 Jan 2016 11:04:19 +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 1321F18CC7B6 for ; Sat, 30 Jan 2016 11:04:19 +0900 (JST) Received: from [221.186.184.76] (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id E716112049E; Sat, 30 Jan 2016 11:04:18 +0900 (JST) X-Original-To: ruby-core@ruby-lang.org Delivered-To: ruby-core@ruby-lang.org Received: from o10.shared.sendgrid.net (o10.shared.sendgrid.net [173.193.132.135]) by neon.ruby-lang.org (Postfix) with ESMTPS id 7ABF3120458 for ; Sat, 30 Jan 2016 11:04:14 +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=X0WQc0BXOsI+EkMdP4Qco7bHUhg=; b=ch04V7iyXgipTcobgY tdx/cCiDNgFKH5L0U1g7cC1O00W5eSm8CD1k2ha0PvoxxrQpXorMsMUJhGqynLg0 yCaWdP7awYtUY5Ezq2jFhM3x7a6/A9XUWztgmlM3SCsycUexp05WXJSrj5ovE1Ei +wBAdxzcicQcxyuqxTQqrlL4s= Received: by filter0420p1mdw1.sendgrid.net with SMTP id filter0420p1mdw1.15114.56AC1A185A 2016-01-30 02:04:08.725722468 +0000 UTC Received: from herokuapp.com (ec2-54-167-130-60.compute-1.amazonaws.com [54.167.130.60]) by ismtpd0004p1iad1.sendgrid.net (SG) with ESMTP id kIQSyUE3QFOyQN6DJHiqiw Sat, 30 Jan 2016 02:04:08.549 +0000 (UTC) Date: Sat, 30 Jan 2016 02:04:08 +0000 From: andrew@avit.ca To: ruby-core@ruby-lang.org Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 48186 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 11848 X-Redmine-Issue-Author: prodis X-Redmine-Issue-Assignee: matz X-Redmine-Sender: avit 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS6yF4ksHjccPyT2++5rjR+ZLlaQUmG1P6+S/V hZKdhsLnyagVvS7v9ptQF+e9lomx6ABkXWfP/5TkTb8ghd0o2wNBSOqb9KSeWRZatJqyf2ClDm8NjY GVAc85LzV/30dIPeVojCCydFoqACqw1QkSYp X-ML-Name: ruby-core X-Mail-Count: 73591 Subject: [ruby-core:73591] [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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ruby-core-bounces@ruby-lang.org Sender: "ruby-core" Issue #11848 has been updated by Andrew Vit. I've had to do this in a few places over the years myself: ~~~ TRUTHY_VALUES = [true, 1, '1', 't', 'T', 'true', 'TRUE', 'y', 'Y', 'yes', 'YES'] FALSY_VALUES = [false, 0, '0', 'f', 'F', 'false', 'FALSE', 'n', 'N', 'no', 'NO'] ~~~ > You forgot empty string/array/hash to be false. ;-) I think the main reason for this is handling user input (from a file like CSV or other), so other types like Array/Hash are not expected there: just basic scalar values. Still, it probably only makes sense for some specific situations. ---------------------------------------- Feature #11848: New #to_b method for String, Symbol, Numeric, NilClass, TrueClass and FalseClass. https://bugs.ruby-lang.org/issues/11848#change-56786 * 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/