From: Martin DeMello <martindemello@...>
Date: 2003-01-12T17:48:27+09:00
Subject: Re: sorting with the Swartzian transform

Daniel Carrera <dcarrera@math.umd.edu> wrote:
> sorted = array.map  { |obj| [ my_function(obj), obj ] }\
>              .sort { |a,b|   a[0] <=> b[0] }\
>              .map  { |arr|   arr[1] }

Even easier-to-use: 

class Array
  def ssort(&block)
    map {{|i| [&block.call(i), i]}\
    .sort {|a,b| a[0] <=> b[0]}\
    .map {|a| a[1]}
  end
end

martin