# File active_record.rb, line 10
  def self.load_db(file_name,sep=";")
    @@file_name=file_name
    @@all=[]
    @@id=0
    @@col_names=nil
    IO.foreach(file_name) do |line|
      line.chomp!
      if @@col_names.nil?
        @@col_names=line.split(sep).map{|c|c.strip} # trouver les noms des colonnes
        @@col_names.each{|n| attr n,true} # créer les méthodes d'instance
      else
        fields = line.split(sep)
        h=Hash.new
        @@col_names.each_with_index{|name,index| h[name]=fields[index]}
        self.create(h)
      end
    end
    # puts "*** Lecture de #{file_name}"
    # puts "all",@@all
  end