# File lib/action_view/helpers/number_helper.rb, line 71
      def number_to_currency(number, options = {})
        options.symbolize_keys!

        defaults  = I18n.translate('number.format''number.format', :locale => options[:locale], :raise => true) rescue {}
        currency  = I18n.translate('number.currency.format''number.currency.format', :locale => options[:locale], :raise => true) rescue {}
        defaults  = defaults.merge(currency)

        precision = options[:precision] || defaults[:precision]
        unit      = options[:unit]      || defaults[:unit]
        separator = options[:separator] || defaults[:separator]
        delimiter = options[:delimiter] || defaults[:delimiter]
        format    = options[:format]    || defaults[:format]
        separator = '' if precision == 0

        begin
          format.gsub(/%n/, number_with_precision(number,
            :precision => precision,
            :delimiter => delimiter,
            :separator => separator)
          ).gsub(/%u/, unit)
        rescue
          number
        end
      end