looping through nested arrays and accessing elements RUBY - arrays

Question

I want to iterate through a nested array and operate on each element, so square each number in this case. I know how to do it for a normal array but for some reason i am getting undefined map method when include deeper iteration to access the inner arrays. Am a newbie too so if you could explain how it works that would help my learning. Thanks
def SquareArrayElements(n)
n.each do |number|
number.map do |num|
squared_nums = num * num
end
end
squared_nums
end
SquareArrayElements([10,[[10],10],[10]])

Answer 1

Since you've said in the comments that:
i want to square the 10s and return them to one array =>[100,100,100,100].
I assume that you don't need to preserve the original arrays and just want one array with the squared results. If that's the case you can #flatten the array and then square the numbers:
def square_array(arr)
arr.flatten.map { |e| e ** 2 }
end
square_array([10,[[10],10],[10]])
#=> [100, 100, 100, 100]

Answer 2

You only need to call map on the arrays, not on the integers. That's why you're getting an undefined map method, integers don't support that method.
Try
def square_array(element)
if element.responds_to?(:map)
element.map{|m| square_array(m)}
else
element * element
end
end