class Seg
  
  def initialize(s="")
    @line=s
    self
  end

  def to_s
    @line.chomp
  end

  def set(s)
    @line=s
    self
  end

  def field(key)
    if key.class==Fixnum
      @line.split[key-1]
    elsif key.class==String
      @line =~ /\s#{key}:(\S+)/; $1
    end
  end
  alias [] field

  def fields
    @line.split
  end

end