# File active_record.rb, line 32
  def self.save_db
    File.open(@@file_name,"w") do |file|
      file << @@col_names.join(';') << "\n"
      @@all.each do |v|
        file << @@col_names.map{|n|v.send n}.join(';')+"\n"
      end
    end
  end