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g2601_2700.s2649_nested_array_generator.readme.md Maven / Gradle / Ivy

2649\. Nested Array Generator

Medium

Given a **multi-dimensional array** of integers, return a generator object which yields integers in the same order as **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.

**Example 1:**

**Input:** arr = [[[6]],[1,3],[]]

**Output:** [6,1,3]

**Explanation:** 

    const generator = inorderTraversal(arr); 
    generator.next().value; // 6 
    generator.next().value; // 1 
    generator.next().value; // 3 
    generator.next().done; // true

**Example 2:**

**Input:** arr = []

**Output:** []

**Explanation:** There are no integers so the generator doesn't yield anything.

**Constraints:**

*   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?**