ruby -e '(1..100).map{|n| case n % 15; when 0 then "FizzBuzz"; when 5,10 then "Buzz"; when 3,6,9,12 then "Fizz"; else n; end}.display'

fizzbuzz.rb

#!/usr/bin/ruby
# 15で割った余りに注目してFizzBuzz

class Integer
	def fizzbuzz
		case self % 15
			when 0 then "FizzBuzz"
			when 5,10 then "Buzz"
			when 3,6,9,12 then "Fizz"
			else self
		end
	end
end

(1..100).map(&:fizzbuzz).each{|e| puts e}

関係ないけどScalaで書くとこんなかんじ

(1 to 100) map (n => n % 15 match {case 0 => "FizzBuzz" case 5|10 => "Buzz" case 3|6|9|12 => "Fizz" case _ => n}) foreach println

セミコロンがなくてきれい✨foreach printlnって書き方もいいね💖