From: "Peña, Botp" <botp@...>
Date: 2008-06-13T17:36:11+09:00
Subject: Re: array to string conversion

From: Sandro Paganotti [mailto:sandro.paganotti@gmail.com] 
# irb(main):004:0> ex
# => {0=>["xls", "ini", "20080326"], 1=>["gif", "xls", "rb"]}
# irb(main):005:0> ex = Hash[*ex.collect{|a,b| [a,b.join(",")]}.flatten]
# => {0=>"xls,ini,20080326", 1=>"gif,xls,rb"}

;)

irb(main):018:0> ex.inject({}){|h,(v,k)| h[v]=k.join(",");h}
=> {0=>"xls,ini,20080326", 1=>"gif,xls,rb"}


kind regards -botp