What are the best practices for iterating over arrays in JavaScript?

What are the best practices for iterating over arrays in JavaScript?

Some best practices include using forEach for side effects, map for transformations, and for...of for readability.

Can you explain when to use each of those methods?

Sure! Use forEach when you need to perform an action on each element, map when you want to create a new array, and for...of for simple iteration.

Are there performance considerations I should be aware of?

Yes, for large arrays, traditional for loops can be faster than forEach or map due to less overhead.

What about using reduce? When should I use that?

Use reduce when you need to accumulate a single value from an array, like summing numbers or flattening arrays.