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

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

One common mistake is using forEach when you need to transform an array, as it doesn't return a new array.

Can you explain why map is better for transformations?

Sure! The map method creates a new array populated with the results of calling a provided function on every element.

What happens if I use return inside forEach?

Using return inside forEach won't affect the outer function; it simply exits the current iteration.

Are there performance differences between map and forEach?

Yes, map can be more efficient for transformations since it directly returns a new array, while forEach is used for side effects.