# File active_record.rb, line 53
  def self.find(option=:all)
    if option==:all
      if block_given?
        return @@all.select{|o|yield o}
      else
        return @@all
      end
    elsif option.kind_of? Integer 
      objs=@@all.select{|o|o.id==option}
      return objs[0]
    end
  end