What are the common mistakes when using forEach and map in JavaScript?

What are the common mistakes when using forEach and map in JavaScript?

Some common mistakes include using forEach when you need to return a new array, or not understanding that map always returns a new array.

Can you explain why using forEach instead of map can be a mistake?

Using forEach doesn't return a new array, so if you need to transform data, map is the better choice.

What happens if I try to use return inside a forEach?

The return statement inside forEach won't affect the outer function; it only exits the current iteration.

Are there performance differences between forEach and map?

Yes, map can be more efficient for creating new arrays, while forEach is better for executing side effects.