Fizzbuzz that also calls out prime numbers, by extending the Fixnum class with a .prime? method.

FizzBuzz,rb

#extends Fixnum class with prim? method. usage ex: 5.prime?
#returns a boolean

class Fixnum
  def prime?
    ('1' * self) !~ /^1?$|^(11+?)\1+$/
  end
end   


nums = (1..100)


#Fizzbuzz as if statements

=begin 

nums.each do |num|
 if num.prime?
  puts "Priiime!"
 elsif num%3 == 0 && num%5 == 0
   puts "fizzbuzz"
 elsif num%3 == 0
   puts "fizz"
 elsif num%5 == 0
   puts "buzz"
 else
   puts num
 end
end

=end

#Fizzbuzz as case expression

nums.each do |num|
 
 case
   when num.prime?
     puts "Priiime!"
   when num%3 == 0 && num%5 == 0
     puts "fizzbuzz"
   when num%3 == 0
     puts "fizz"
   when num%5 == 0
     puts "buzz"
   else
     puts num
   end
end