class Converter

  def initialize
    @specs = []
  end

  def specs( value , &cond )
    @specs << lambda { |e| cond[e] ? value : nil }
  end

  def to_proc
    lambda { |e| 
      conved = @specs.map{ |spec| spec[e] }.join
      conved.empty? ? e : conved
    }
  end

end

if __FILE__ == $0

  arg   = ARGV[0] || 100
  limit = arg.to_i

  fizzbuzz  = Converter.new

  fizzbuzz.specs( "Fizz" ) { |n| n % 3 == 0 }
  fizzbuzz.specs( "Buzz" ) { |n| n % 5 == 0 }

  puts 1.upto(limit).map(&fizzbuzz)

end