How do you create your own multidimensional array?

Question

I am coding and I came across this problem in my code, How do you create your own multidimensional array in Ruby? I tried searching up but none of the websites could help.

Answer 1

There are no multidimentional arrays in Ruby (at least they are not first class citizens.)

One might simulate this behavior by creating an array containing arrays of the same length:

arr = [[1, 2], [3, 4]]

or, dynamically:

arr = Array.new(2) { |_| Array.new(2) } 

Also, there is Matrix class in standard library.