Idiomatic Ruby FizzBuzz

fizzbuzz.rb

class FizzBuzz
  def perform
    iterate_to(100) do |num,out|
      out += "Fizz" if num.divisable_by?(3)
      out += "Buzz" if num.divisable_by?(5)
      out || num
    end
  end

  def iterate_to(max)
    (1..max).each do |num|
      puts yield num,nil
    end
  end
end

class Fixnum
  def divisable_by?(num)
    self % num == 0
  end
end

class NilClass
  def +(other)
    other
  end
end

FizzBuzz.new.perform

# 1
# 2
# Fizz
# 4
# Buzz
# Fizz
# 7
# 8
# Fizz
# Buzz
# 11
# Fizz
# 13
# 14
# FizzBuzz
# 16
# 17
# Fizz
# 19
# Buzz
# Fizz
# 22
# 23
# Fizz
# Buzz
# 26
# Fizz
# 28
# 29
# FizzBuzz
# 31
# 32
# Fizz
# 34
# Buzz
# Fizz
# 37
# 38
# Fizz
# Buzz
# 41
# Fizz
# 43
# 44
# FizzBuzz
# 46
# 47
# Fizz
# 49
# Buzz
# Fizz
# 52
# 53
# Fizz
# Buzz
# 56
# Fizz
# 58
# 59
# FizzBuzz
# 61
# 62
# Fizz
# 64
# Buzz
# Fizz
# 67
# 68
# Fizz
# Buzz
# 71
# Fizz
# 73
# 74
# FizzBuzz
# 76
# 77
# Fizz
# 79
# Buzz
# Fizz
# 82
# 83
# Fizz
# Buzz
# 86
# Fizz
# 88
# 89
# FizzBuzz
# 91
# 92
# Fizz
# 94
# Buzz
# Fizz
# 97
# 98
# Fizz
# Buzz