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

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

When iterating over arrays in JavaScript, it's important to consider performance and readability. Common methods include for loops, forEach, map, and for...of.

Can you explain the differences between forEach and map?

Sure! forEach executes a provided function once for each array element but doesn't return a new array. map, on the other hand, creates a new array populated with the results of calling a provided function on every element.

When should I use a for loop instead of forEach or map?

Use a for loop when you need more control over the iteration process, such as breaking out of the loop early or iterating in reverse.

Are there any 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. However, for readability, prefer higher-order functions unless performance is critical.