gistfile1.txt

module InWords
  require 'enumerator'

  ONES=  %w{one two three four five six seven eight nine ten eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen}.unshift("")
  TENS = %w{twenty thirty forty fifty sixty seventy eighty ninety}.unshift("", "")

  def in_words
    r = ""
    if self > 99
      r = ONES[self/100] + " hundred " + (self%100).in_words
    elsif self >= 20
      r = TENS[self/10] + " " + (self%10).in_words
    else
      r = ONES[self]
    end
    r ? r.strip : ""
  end
end

class Numeric
  include InWords
end



module InWords
  SMALL_NUMBERS = %w{zero one two three four five six seven eight nine ten eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen}
  TENS = %w{zero ten twenty thirty forty fifty sixty seventy eighty ninety}
  
  def in_words
    # convert to string to easily grab digits
    self_string = self.to_s
    # for the digits that don't exist they will be nil
    #   nil.to_i = 0
    h = self_string[-3].to_i
    t = self_string[-2].to_i
    o = self_string[-1].to_i
    
    words = []
    
    # hundred
    words << SMALL_NUMBERS[h.to_i] + " hundred" if h != 0
    
    # teens
    if t == 1
      words << SMALL_NUMBERS[self_string[-2..-1].to_i]
    # non-teen
    else
      words << TENS[t] if t != 0
      words << SMALL_NUMBERS[o.to_i] if o != 0
    end
    
    words.join(" ")
  end
end

class Fixnum
  include InWords
end


SMALL_NUMBERS = %w{one two three four five six seven eight nine ten eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen}
TENS = %w{ten twenty thirty forty fifty sixty seventy eighty ninety}

def in_words_old_2
  return "n/a" if self > 999
  # to get an array that has [ones,tens,hundreds]
  array = self.to_s.split('').reverse
  parts = []
  if self > 99
    parts << SMALL_NUMBERS[array[2].to_i - 1] + " hundred"
    array.pop
  end
  if self > 19 && array[0..1].reverse.join.to_i > 19
    parts << TENS[array[1].to_i - 1]
    parts << SMALL_NUMBERS[array[0].to_i - 1]
  else
    parts << SMALL_NUMBERS[array[0..1].reverse.join.to_i - 1]      
  end
  parts.join(" ")
end

def in_words_old
  return "n/a" if self > 999
  num = []
  h = self - (self%100)
  t = self - h - (self%10)
  o = self - h - t - (self%1)
  
  # puts "#{self} h:#{h} t:#{t} o:#{o}"
  
  if h > 0
    # 100-900 - all hundred-digits are the same
    num << (%w{one two three four five six seven eight nine}[h/100 - 1] + " hundred")
  end
  
  if t > 20
    # 20-90 - all ten-digits are the same
    num << %w{twenty thirty forty fifty sixty seventy eighty ninety}[t/10 - 2]
  end
  
  if (t+o) < 20
    # 1-19 - all unqiue, need to just look up
    num << %w{one two three four five six seven eight nine ten eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen}[(t+o) -1]      
  else
    # 1-9
    num << %w{one two three four five six seven eight nine}[o -1]      
  end

  num.join(" ")
end