From: Thufir <hawat.thufir@...>
Date: 2007-11-09T13:00:13+09:00
Subject: singleton is this easy?

Is this all that's required to ensure that there's ever only one
instance of an ArrayOfCreatures?  Seems too easy!


C:\code>
C:\code>
C:\code>type Driver.rb
require 'ArrayOfCreatures'

require 'Dragon'

someCreatures=ArrayOfCreatures.instance

puts "\nquantity of creatures:"
numOfCreatures = gets.chomp.to_i


0.upto(numOfCreatures) do |i|
        someCreatures[i]=Dragon.new
end



someCreatures.toString
C:\code>
C:\code>
C:\code>type ArrayOfCreatures.rb
require 'singleton'

class ArrayOfCreatures < Array


include Singleton


def toString

        print "\n\n\nArrayOfCreatures\n"
        print "================\n\n"

        i=0
        while i < self.length
                print "\n\n"
                print i
                print ":\n"
                print self[i].toString
                i=i+1
        end

end


end
C:\code>
C:\code>


thanks,

Thufir