From: "Hanmac (Hans Mackowiak)" <hanmac@...>
Date: 2013-06-14T03:19:16+09:00
Subject: [ruby-core:55482] [ruby-trunk - Feature #8422] add Enumerable#reverse_sort and Enumerable#reverse_sort_by


Issue #8422 has been updated by Hanmac (Hans Mackowiak).


my idea would be this, for ruby it may be cood if its converted into C++ code

 module Enumerable
 def reverse_sort(&block)
 block ||= proc {|x,y| x <=> y }
 sort {|x,y| - block.call(x,y)}
 end
 
 
 def reverse_sort_by
 return to_enum(__method__) unless block_given?
 sort_by{|x| - yield(x)}
 end
 end
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Feature #8422: add Enumerable#reverse_sort and Enumerable#reverse_sort_by
https://bugs.ruby-lang.org/issues/8422#change-39915

Author: Hanmac (Hans Mackowiak)
Status: Feedback
Priority: Normal
Assignee: 
Category: 
Target version: 


they are better when you want descending order,
  enum.sort.reverse
does work too, but it is to slow because it needs to build that result array twice

they both can be defined just like #sort and #sort_by but negates the result of the compare block


-- 
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