From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS4713 221.184.0.0/13 X-Spam-Status: No, score=-3.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_PASS,T_DKIM_INVALID,T_RP_MATCHES_RCVD shortcircuit=no autolearn=ham autolearn_force=no version=3.4.0 Received: from neon.ruby-lang.org (neon.ruby-lang.org [221.186.184.75]) by dcvr.yhbt.net (Postfix) with ESMTP id 61E511FA7B for ; Fri, 16 Jun 2017 14:14:47 +0000 (UTC) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id CFE7C1207E1; Fri, 16 Jun 2017 23:14:44 +0900 (JST) Received: from o1678948x4.outbound-mail.sendgrid.net (o1678948x4.outbound-mail.sendgrid.net [167.89.48.4]) by neon.ruby-lang.org (Postfix) with ESMTPS id CAC111207CA for ; Fri, 16 Jun 2017 23:14:42 +0900 (JST) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d=sendgrid.me; h=from:to:references:subject:mime-version:content-type:content-transfer-encoding:list-id; s=smtpapi; bh=1RKXF35GiMQlgiUvog6jM7cqZ6Q=; b=dKrt7otB99Jx+oSQQE ysMb3NTnHMDvpmlGidKiKQKYncRa852ZI737y1jw2xqbEYbEXNkVsa3bLrvEJ2mL Z6XPvIXtxt5t/HoS5xXchqR6RhhsFGju30dQOJTK/4em8Utuf2D4ngIRc5IWDCmY lbLqA/4LGGzi8LUE0XNsc5R3U= Received: by filter0816p1mdw1.sendgrid.net with SMTP id filter0816p1mdw1-11062-5943E7C9-34 2017-06-16 14:14:33.654521903 +0000 UTC Received: from herokuapp.com (ec2-54-166-169-114.compute-1.amazonaws.com [54.166.169.114]) by ismtpd0006p1iad1.sendgrid.net (SG) with ESMTP id aCNFFrqgQrWb91cN_kRvhg for ; Fri, 16 Jun 2017 14:14:33.656 +0000 (UTC) Date: Fri, 16 Jun 2017 14:14:33 +0000 From: hanmac@gmx.de To: ruby-core@ruby-lang.org Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 56741 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 12694 X-Redmine-Issue-Author: sonots X-Redmine-Sender: Hanmac 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS61pDnWAOd89qWOdENBdKyI/OO5mk1dsR9Lmu 3F/RoWnZJWPw6rDC6oqjIWeq2lBBKUtMNCdomGkfudwqeP1roZIQ7SyiMKZ53DDsesgm765b62v9Yo Cm+vGGzKTAUymPce6ioFccrcI3nu7q59N5u1 X-ML-Name: ruby-core X-Mail-Count: 81712 Subject: [ruby-core:81712] [Ruby trunk Feature#12694] Want a String method to remove heading substr 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 #12694 has been updated by Hanmac (Hans Mackowiak). sonots (Naotoshi Seo) wrote: > Thanks! I've changed the name to delete_prefix. https://github.com/ruby/ruby/pull/1632 do we need a delete_suffix too or is that done via another method? ---------------------------------------- Feature #12694: Want a String method to remove heading substr https://bugs.ruby-lang.org/issues/12694#change-65410 * Author: sonots (Naotoshi Seo) * Status: Open * Priority: Normal * Assignee: * Target version: ---------------------------------------- I often write codes like: ```ruby str = 'abcdef' substr = 'abc' str[substr.size..-1] if str.start_with?(substr) #=> 'def' # or str.sub(/\A#{Regexp.escape(substr)}/, '') #=> 'def' ``` I want a short hand which is something like: ```ruby str = 'abcdef' substr = 'abc' str.lstrip(substr) #=> 'def' ``` Having similar argument for `String#rstrip` would be nice for symmetry although we already have `String#chomp(substr)` My frequent use-case is coming from fluentd. We have `remove_tag_prefix` option to remove a heading substring from a tag. We currently using `String#sub` with a regular expression, but I feel regular expression matching is too much just to remove a heading substring. https://github.com/fluent/fluentd/blob/75005f18d48ed3d416890413fa5f83982b264c71/lib/fluent/compat/handle_tag_name_mixin.rb#L45 -- https://bugs.ruby-lang.org/