From: Stephane Wirtel <stephane.wirtel@...>
Date: 2008-01-23T17:20:09+09:00
Subject: Re: How to improve this code?

You can try this code

#!/usr/bin/env ruby

require "csv"

hash = Hash.new { |hash,key| hash[key] = [] }

CSV.open( "file.csv", "r", "," ) do |row|
	hash[row[0]] << row[1]
end

Good luck

Stephane