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

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

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

Can you explain why using forEach for transformations is a mistake?

Sure! forEach is meant for executing a function on each element without returning anything, while map is designed to create a new array based on the results of the function.

What about using filter incorrectly?

A common mistake with filter is not returning a boolean value in the callback function, which can lead to unexpected results.

How can I avoid these mistakes in my code?

Always choose the right method for your needs: use map for transformations, filter for filtering, and forEach for side effects.