Nested Array Inorder Traversal Generator

36.6% Acceptance

In this lab, you will implement a generator function that performs an inorder traversal of a given multi-dimensional array of integers. The generator object should yield integers in the same order as the inorder traversal.

A multi-dimensional array is a recursive data structure that contains both integers and other multi-dimensional arrays.

Inorder traversal iterates over each array from left to right, yielding any integers it encounters or applying inorder traversal to any arrays it encounters.


Consider the following example:

const arr = [[[6]], [1, 3], []]; const generator = inorderTraversal(arr);; // 6; // 1; // 3; // true

In this case, the input arr = [[[6]], [1, 3], []] will produce the output [6, 1, 3] after performing inorder traversal.

Here is another example:

const arr = []; const generator = inorderTraversal(arr);; // true

In this case, the input arr = [] will produce the output [] because there are no integers in the array, so the generator doesn't yield anything.


  • 0 <= arr.flat().length <= 105
  • 0 <= arr.flat()[i] <= 105
  • maxNestingDepth <= 105

Can you solve this without creating a new flattened version of the array?


  1. Write a function inorderTraversal that takes a multi-dimensional array as input and returns a generator object that yields integers in the same order as an inorder traversal.
  2. The generator function must not create a new flattened version of the input array.
  3. Make sure to export the function