What is the difference between mutable and immutable arrays?

What is the difference between mutable and immutable arrays?

Mutable arrays can be changed after creation, while immutable arrays cannot be modified once they are created.

Can you give me an example of each?

Sure! In JavaScript, an array declared with let is mutable, while a string array created with Object.freeze() is immutable.

Why would I use immutable arrays?

Immutable arrays can help prevent unintended side effects and make your code easier to reason about.

Are there performance differences between them?

Yes, mutable arrays can be faster for frequent updates, while immutable arrays may have overhead due to copying.