Ordinal Indicators in Ruby

ordinals.rb

class Fixnum
  def with_ordinals
    if (11..13).include?(self.abs % 100)
      'th'
    else
      case self.abs % 10
        when 1 then 'st'
        when 2 then 'nd'
        when 3 then 'rd'
        else 'th'
      end
    end.prepend(self.to_s)
  end
end

thanks this helped, found this after some more digging: if (11..13).include?(abs_number % 100) so you get 111th instead of 111st http://apidock.com/rails/ActiveSupport/Inflector/ordinal

Good catch!