自己書き換え再帰でFizzBuzzやってみた

self-rec-fizz-buzz.rb

n = 1

if n%15  == 0
  puts "FizzBuzz"
elsif n%3 == 0
  puts "Fizz"
elsif n%5 == 0
  puts "Buzz"
else
  puts n
end

if n == 100
  n = 1
  cmd = "exit"
else
  n += 1
  cmd = "system('exec ruby #{__FILE__}')"
end

lines = File.readlines(__FILE__)
lines[0] = "n = #{n}\n"
File.write(__FILE__, lines.join)
eval cmd