fizzbuzz.rb

fizz = f = lambda {
  fizz = lambda {
    fizz = lambda {
      fizz = f
      "Fizz"
    }
    nil
  }
  nil
}

buzz = b = lambda {
  buzz = lambda {
    buzz = lambda {
      buzz = lambda {
        buzz = lambda {
          buzz = b
          "Buzz"
        }
        nil
      }
      nil
    }
    nil
  }
  nil
}

puts (1..100).map {|i| (_ = "#{fizz[]}#{buzz[]}").empty? ? i.to_s : _ }