How would you create a function to convert a nested list of integers into a flat list, and can you make an asynchronous version of this function using async/await?

Hard Difficulty

Hard questions require advanced understanding and critical thinking. Here, your problem-solving skills are key, as these questions often involve complex scenarios needing in-depth analysis and well-structured responses.

Coding question

Coding questions assess your programming abilities and thought process. Showcase your problem-solving approach, coding style, knowledge of data structures, and ability to write clean, efficient, and maintainable code.

Here's a Hint

Start with a recursive approach for flattening, then demonstrate how to transform it into an asynchronous function by introducing promises and async/await syntax.