From: Josselin <josselin@...>
Date: 2007-03-28T00:50:04+09:00
Subject: Re: splitting an array into sub_arrays ...need advice

On 2007-03-25 22:28:42 +0200, Olivier Renaud <o.renaud@laposte.net> said:

> Note that partition_by is a simple method with no dependencies. So, you can
> just copy/paste this method in your code from facets.rubyforge.org online
> documentation. Here it is :
> 
> module Enumerable
>   def partition_by
>     r = Hash.new{ |h,k| h[k]=[] }
>     each do |e|
>       r[ yield(e) ] << e
>     end
>     return r
>   end
> end
> 
> And then :
> 
> require 'enumerator'
> start_array.partition_by {|ary| ary[1..2]}.to_enum(:each_value).to_a

thanks a lot I got it