What are some real-world examples of immutable arrays?

What are some real-world examples of immutable arrays?

Immutable arrays are used in functional programming languages like Haskell and Scala. For instance, in Haskell, lists are immutable, meaning once created, they cannot be changed. This is useful for maintaining state in applications without side effects.

Can you give me an example in JavaScript?

Sure! In JavaScript, you can use libraries like Immutable.js to create immutable arrays. For example, you can create an immutable list of items and perform operations like adding or removing items without altering the original list.

What are the benefits of using immutable arrays?

The benefits include easier debugging, improved performance in concurrent applications, and predictable state management, which is crucial in frameworks like React.

Are there any downsides to using them?

Yes, the main downside is that they can lead to increased memory usage since each modification creates a new array. This can impact performance if not managed properly.