From: "Ara.T.Howard" <Ara.T.Howard@...>
Date: 2005-10-11T06:55:09+09:00
Subject: Re: Sort pseudo-lists

On Tue, 11 Oct 2005, pete boardman wrote:

> Say I've got a string like this:
>
> "{{3.1, 1.3, 2.5, 2.1}, {2.1, 3.1, 2.4, 2.2}, {1.4, 2.2, 2.1, 4.2}}"
>
> - imagine it's aspiring to be a list of sublists, with 4 reals in each list. 
> I want to produce a sorted version:
>
> (1.4    2.2    2.1    4.2)
> (2.1    3.14  2.4    2.2)
> (3.1    1.3    2.5    2.1)
>
> What would be a good way to do this?

   harp:~ > cat a.rb
   buf = "{{3.1, 1.3, 2.5, 2.1}, {2.1, 3.1, 2.4, 2.2}, {1.4, 2.2, 2.1, 4.2}}"
   buf.gsub! %r/ { /x, ' [ '
   buf.gsub! %r/ } /x, ' ] '

   require 'yaml'
   list = YAML::load(buf).map{|s| s.sort}.sort

   p list

   harp:~ > ruby a.rb
   [[1.3, 2.1, 2.5, 3.1], [1.4, 2.1, 2.2, 4.2], [2.1, 2.2, 2.4, 3.1]]


-a
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