convert

# File activesupport/lib/active_support/number_helper/number_to_currency_converter.rb, line 10
      def convert
        format = options[:format]

        number_f = valid_float?
        if number_f
          if number_f.negative?
            number_f = number_f.abs
            format = options[:negative_format] if (number_f * 10**options[:precision]) >= 0.5
          end
          number_s = NumberToRoundedConverter.convert(number_f, options)
        else
          number_s = number.to_s.strip
          format = options[:negative_format] if number_s.sub!(/^-/, "")
        end

        format.gsub("%n", number_s).gsub("%u", options[:unit])
      end