my_block = <<FILTER_BLOCK
row << row[0].slice(/^.+\:\/\/([^\/]+)/, 1)
row << file.slice(/([^-]+-[^-]+)/,1)
FILTER_BLOCK

DirectoryFilters.send(dir_filter, path) do |file|
  res = FileFilters.send(file_filter, path, file, "\t") do |row|
    eval(my_block)
  end
end