class Machine < Struct.new(:name,:ipaddress,:role,:env)
    def print_machine_csv
        name.length==0 ? printf(",") : printf("\"%s\",", name)
        address.length==0 ? printf(",") : printf("\"%s\",", address)
        role.length==0 ? printf(",") : printf("\"%s\",", role)
        env.length==0 ? printf(",") : printf("\"%s\",", env)
        printf("\n")
    end
end unless defined? Machine

require 'csv'
class NewMachine
  attr_accessor :name, :ipaddress, :role, :env

  def initialize(name, ipaddress, role, env)
    @name, @ipaddress, @role, @env = name, ipaddress, role, env
  end

  def to_csv
    [name, ipaddress, role, env].to_csv
  end
end