# File lib/action_view/helpers/number_helper.rb, line 196
      def number_with_precision(number, *args)
        options = args.extract_options!
        options.symbolize_keys!

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

        unless args.empty?
          ActiveSupport::Deprecation.warn('number_with_precision takes an option hash ' +
            'instead of a separate precision argument.', caller)
          precision = args[0] || defaults[:precision]
        end

        precision ||= (options[:precision] || defaults[:precision])
        separator ||= (options[:separator] || defaults[:separator])
        delimiter ||= (options[:delimiter] || defaults[:delimiter])

        begin
          rounded_number = (Float(number) * (10 ** precision)).round.to_f / 10 ** precision
          number_with_delimiter("%01.#{precision}f" % rounded_number,
            :separator => separator,
            :delimiter => delimiter)
        rescue
          number
        end
      end