Contents

module Jekyll
  module Roman

    class Integer
      def initialize(number)
        @number = number.to_i
      end

      def to_roman
        roman_arr = {
          1000 => "M",
          900 => "CM",
          500 => "D",
          400 => "CD",
          100 => "C",
          90 => "XC",
          50 => "L",
          40 => "XL",
          10 => "X",
          9 => "IX",
          5 => "V",
          4 => "IV",
          1 => "I"
        }
        num = @number

        roman_arr.reduce("") do |res, (arab, roman)|
          whole_part, num = num.divmod(arab)
          res << roman * whole_part
        end
      end
    end

    def roman(input)
      if /\A\d+\z/.match(input.to_s) # input is a positive number
        Integer.new(input).to_roman
      else
        return input
      end
    end

  end
end

Liquid::Template.register_filter(Jekyll::Roman)

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
jekyll-roman-0.0.3	lib/jekyll/roman.rb
jekyll-roman-0.0.2	lib/jekyll/roman.rb
jekyll-roman-0.0.1	lib/jekyll-roman.rb