number_with_delimiter (ActionView::Helpers::NumberHelper)

    # File lib/action_view/helpers/number_helper.rb, line 150
          def number_with_delimiter(number, *args)
            options = args.extract_options!
            options.symbolize_keys!

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

            unless args.empty?
              ActiveSupport::Deprecation.warn('number_with_delimiter takes an option hash ' +
                'instead of separate delimiter and precision arguments.', caller)
              delimiter = args[0] || defaults[:delimiter]
              separator = args[1] || defaults[:separator]
            end

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

            begin
              parts = number.to_s.split('.')
              parts[0].gsub!(/(\d)(?=(\d\d\d)+(?!\d))/, "\\1#{delimiter}")
              parts.join(separator)
            rescue
              number
            end
          end