Write a Ruby program to check whether a given array contains a 3 next to a 3 or a 5 next to a 5, but not both

def check_array(nums)
   no3pair = 1
   no5pair = 1
   i = 0;
   while i < nums.length && (no3pair + no5pair != 0)
        if(nums[i] == 3 && nums[i+1] == 3)
			no3pair = 0
		elsif(nums[i] == 5 && nums[i+1] == 5)
			no5pair = 0
		end	
	i = i + 1
   end
   return ((no3pair ^ no5pair) == 1)
end
print check_array([3, 3, 7, 5]),"\n"
print check_array([3, 8, 5, 9]),"\n"
print check_array([3, 7, 5, 5]),"\n"

Output: