From: jfn@... (Jeremy Nelson)
Date: 2001-02-06T04:40:03+09:00
Subject: [ruby-talk:10383] Re: Multi-dimensional Array

In article <95ia88$vuk$1@nnrp1.deja.com>, Jason  <jasowong@my-deja.com> wrote:
>Hi All,
>
>a. Is a multi-dimensional array the best way to track this information?
>b. Does Ruby have support for it?
>c. Is there a better way to keep the information?

I won't touch questions 'a' and 'c' because others have.  But Ruby makes 
multi-dimensional arrays really easy to construct:

class Matrix < Array
        def initialize (rows, columns)
                super(rows)
                self.each_index { |i| 
                        self[i] = Array.new(columns) 
                        self[i].each_index { |j| self[i][j] = rand(10) }
                }
        end
end

arr = Matrix.new(12, 15)

arr.each { |i| p i }
arr.each { |i| i.each { |j| p j } }
arr.each_index { |i| 
        arr[i].each_index { |j| 
                puts "#{i},#{j} -> #{arr[i][j]}"
        } 
}

Ruby is so much fun! =)
Jeremy