From: Ryan Leavengood <leavengood@...>
Date: 2005-10-20T00:48:03+09:00
Subject: Re: Array.sort when it's items are String inheritors with redefined <=> works like if not redefined

I think you have a bug here, Ara:

On 10/19/05, Ara.T.Howard <Ara.T.Howard@noaa.gov> wrote:
>
>    harp:~ > cat a.rb
>    class Array
>      def sort_as!
>        map!{|elem| yield elem}
>        sort!
>        self
>      end
>      def sort_as
>        dup.sort! #???
>      end

How about:

  def sort_as(&block)
    dup.sort_as!(&block)
  end

>    end
>
>
>    a = %w( 1 10 5 )
>
>    p a.sort_as{|s| Integer s}
>    p a.sort_as{|s| Float s}
>    p a.sort_as{|s| s.reverse }
>
>    a.sort_as!{|s| Integer s}
>    p a

C:\_Ryan\ruby>ruby a.rb
[1, 5, 10]
[1.0, 5.0, 10.0]
["01", "1", "5"]
[1, 5, 10]

I'm not sure it is worth adding such a method, when a map{}.sort would
do the same thing, and is more explicit. Plus we have sort_by to solve
the OP's problem.

Ryan