When should I use arrays or objects in JavaScript?

When should I use arrays or objects in JavaScript?

You should use arrays when you need an ordered collection of items, and objects when you need key-value pairs.

Can you give me an example of when to use each?

Sure! Use an array for a list of names, like ['Alice', 'Bob', 'Charlie']. Use an object for user data, like {name: 'Alice', age: 25}.

What are the performance differences between them?

Arrays are optimized for numerical indexing and iteration, while objects are better for fast key-based access.

Are there any situations where one is preferred over the other?

Yes, if you need to maintain order and perform operations like sorting, use arrays. For structured data with unique keys, use objects.