We should have a method that duplicates an array and all subarrays, like this: ```javascript helpful.deepDuplicateArray([1, 2, [3, 4], 5]) => [1, 2, [3, 4], 5] ``` We encourage using the existing `duplicateArray` method and recursion to create the `deepDuplicateArray` method.
We should have a method that duplicates an array and all subarrays, like this:
We encourage using the existing
duplicateArraymethod and recursion to create thedeepDuplicateArraymethod.