What are the limitations of map in JavaScript?

What are the limitations of the map function in JavaScript?

The map function in JavaScript has a few limitations. It doesn't mutate the original array, it only works on arrays, and it skips empty slots.

Can you explain why it doesn't mutate the original array?

Sure! The map function creates a new array populated with the results of calling a provided function on every element in the calling array, leaving the original array unchanged.

What happens if the array has holes or undefined values?

If the array has holes (i.e., missing elements), the map function will skip those holes and not call the provided function for them. However, it will include undefined values in the new array.

Are there any performance concerns with using map?

Yes, using map can be less performant than a traditional for loop, especially for large arrays, due to the overhead of creating a new array.