When should I use objects instead of arrays in JavaScript?

When should I use objects instead of arrays in JavaScript?

You should use objects when you need to store data as key-value pairs, while arrays are better for ordered lists.

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

Sure! Use an array for a list of names, like ['Alice', 'Bob'], and an object for user details, 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 quick lookups by key.

Are there any situations where I should avoid using either?

Yes, avoid using arrays for large datasets where you need fast access by key, and avoid objects for ordered data.