FizzBuzz in Elixir / The Magic of Functional Pattern Matching

fizzbuzz.ex

fb = fn
  0, 0, _ -> "FizzBuzz"
  0, _, _ -> "Fizz"
  _, 0, _ -> "Buzz"
  _, _, x -> x
end

fizzbuzz = fn (n) -> fb.(rem(n, 3), rem(n, 5), n) end

fizzbuzz.(10) # => "Buzz"
fizzbuzz.(11) # => 11
fizzbuzz.(12) # => "Fizz"
fizzbuzz.(13) # => 13
fizzbuzz.(14) # => 14
fizzbuzz.(15) # => "FizzBuzz"
fizzbuzz.(16) # => 16