def execute
      File.open(out_file, 'w') do |o|
        File.new(in_file, 'r').each_with_index do |line, index|
          extraction = col_filter.process(row_filter.process(line.chomp, row: index))
          o.puts extraction unless extraction.nil?
        end
      end
    end
def execute
      File.open(out_file, 'w') do |o|
        File.new(in_file, 'r').each_with_index do |line, index|
          extraction = col_filter.process(row_filter.process(line.chomp, row: index))
          o.puts extraction unless extraction.nil?
        end
      end
    end
Creates a new extractor
 Executes the extractor