From: matz@... Date: 2016-04-21T00:52:22+00:00 Subject: [ruby-core:75056] [Ruby trunk Feature#12306] Implement String #blank? #present? and improve #strip and family to handle unicode Issue #12306 has been updated by Yukihiro Matsumoto. I agree with making `strip` etc. encoding aware, as we did for `upcase` etc., although priority is low. I don't see the benefit of `blank?` and `present?`, so it has little chance to have them in standard Ruby. But if `String#blank?` checks if the string only contains spaces, it means something, but I still don't see real-world use-case. Matz. ---------------------------------------- Feature #12306: Implement String #blank? #present? and improve #strip and family to handle unicode https://bugs.ruby-lang.org/issues/12306#change-58177 * Author: Sam Saffron * Status: Open * Priority: Normal * Assignee: ---------------------------------------- Time and again there have been rejected feature requests to Ruby core to implement `blank` and `present` protocols across all objects as ActiveSupport does. I am fine with this call and think it is fair. However, for the narrow case of String having `#blank?` and `#present?` makes sense. - Provides a natural extension over `#strip`, `#lstrip` and `#rstrip`. `(" ".strip.length == 0) == " ".blank?` - Plays nicely with ActiveSupport, providing an efficient implementation in Ruby core: see: https://github.com/SamSaffron/fast_blank, implementing blank efficiently requires a c extension. However, if this work is to be done, `#strip` and should probably start dealing with unicode blanks, eg: ``` irb(main):008:0> [0x3000].pack("U") => "���" irb(main):009:0> [0x3000].pack("U").strip.length => 1 ``` So there are 2 questions / feature requests here 1. Can we add blank? and present? to String? 2. Can we amend strip and family to account for unicode per: https://github.com/SamSaffron/fast_blank/blob/master/ext/fast_blank/fast_blank.c#L43-L74 -- https://bugs.ruby-lang.org/ Unsubscribe: