What are the best practices for array iteration in JavaScript?

What are the best practices for array iteration in JavaScript?

When iterating over arrays in JavaScript, it's important to choose the right method based on your needs. Common methods include for loops, forEach, map, filter, and reduce.

Can you explain when to use forEach versus map?

Sure! Use forEach when you want to execute a function on each element without returning a new array. Use map when you want to transform each element and create a new array with the results.

What about performance? Are some methods faster than others?

Yes, performance can vary. For large arrays, traditional for loops are often faster than forEach or map. However, for readability and maintainability, using higher-order functions like map and filter is usually preferred.

Are there any pitfalls to avoid when using these methods?

Definitely! One common pitfall is modifying the original array while iterating over it, which can lead to unexpected results. Also, be cautious with asynchronous operations inside these methods.