Int to Romans

romans.rb

class Romans
  @@romans = {
    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'
  }

  def self.parse_int(i)
    result = []
    desc_keys = @@romans.keys.sort.reverse
    while i > 0 do
      desc_keys.map do |r|
        d = (i / r).to_i
        next if d <= 0
        result.push(@@romans[r] * d)
        i -=  r * d
      end
    end
    return result
  end
end

puts Romans.parse_int(2015)