Say MegaNums

gistfile1.txt

class MegaNums

  def initialize(number)
    @number = number
  end

  def say_num
    word_nums = ""

    if @number > 999_999
      word_nums << convert(@number/1_000_000)
      word_nums << " million "
    end

    if @number > 999
      word_nums << convert(@number/1000)
      word_nums << " thousand "
    end

    word_nums << convert(@number)
    word_nums.strip.squeeze(" ")
  end

  def low_nums
    [""] + %w(one two three four five six seven eight nine
    ten eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen)
  end

  def decades
    %w(singles teens twenty thirty forty fifty sixty seventy eighty ninety)
  end

  def convert(three_digits)
    word_nums = ""
    ones = three_digits % 10
    tens = three_digits % 100 / 10
    hundreds = three_digits % 1000 / 100

    if hundreds != 0
      word_nums << "#{low_nums[hundreds]} hundred "
    end

    if tens < 2
      word_nums << low_nums[three_digits%100]
    else
      if tens != 0
        word_nums << "#{decades[tens]}"
        if ones != 0
          word_nums << "-"
        end
      end
      if ones != 0
        word_nums << "#{low_nums[ones]}"
      end
    end
    word_nums.strip.squeeze(" ")
  end

end