Map Method vs forEach

What's the difference between the map method and forEach in JavaScript?

The map method creates a new array by applying a function to each element, while forEach executes a function on each element without returning a new array.

Can you give me an example of how to use both methods?

Sure! For map: const doubled = arr.map(num => num * 2); For forEach: arr.forEach(num => console.log(num));

When should I use map instead of forEach?

Use map when you need to transform data and create a new array. Use forEach when you just want to perform an action on each element without needing a new array.

Are there any performance differences between them?

Generally, map can be slightly slower due to creating a new array, but the difference is often negligible for small datasets.