def parse
      self.class.rules.each do |target, (selector, delegate, plural)|
        if plural
          send(target).concat @doc.search(selector).map { |i| parse_result(i, delegate) }
        else
          send("#{target}=", parse_result(@doc.at(selector), delegate))
        end
      end
      self
    end
def parse
      self.class.rules.each do |target, (selector, delegate, plural)|
        if plural
          send(target).concat @doc.search(selector).map { |i| parse_result(i, delegate) }
        else
          send("#{target}=", parse_result(@doc.at(selector), delegate))
        end
      end
      self
    end
Initialize the parser with a document
 Parse the document and save values returned by selectors