# File lib/faster_csv.rb, line 256
    def fields( *headers_and_or_indices )
      if headers_and_or_indices.empty?  # return all fields--no arguments
        @row.map { |pair| pair.last }
      else                              # or work like values_at()
        headers_and_or_indices.map { |h_or_i| field(*Array(h_or_i)) }
      end
    end