What is the difference between JavaScript objects and arrays?

What is the difference between JavaScript objects and arrays?

JavaScript objects are key-value pairs, while arrays are ordered lists of values. Objects are used for storing data with named properties, and arrays are used for storing sequences of data.

Can you give me an example of each?

Sure! An object can be defined like this: const person = { name: 'Alice', age: 25 }; An array can be defined like this: const colors = ['red', 'green', 'blue'];

When should I use an object instead of an array?

Use an object when you need to represent data with named properties, and use an array when you need to maintain an ordered collection of items.

Are there any performance differences between them?

Yes, arrays are optimized for numerical indexing and iteration, while objects are optimized for key-value access. Performance can vary based on the use case.