# File lib/cookiejar/jar.rb, line 278
    def gather_header_values http_header_value, &block
      result = []
      http_header_value
      if http_header_value.is_a? Array
        http_header_value.each do |value| 
          result << block.call(value)
        end
      elsif http_header_value.is_a? String
        result << block.call(http_header_value)
      end
      result.compact
    end