What are RxJS operators and how do they work?

What are RxJS operators and how do they work?

RxJS operators are functions that enable you to manipulate and transform data streams in reactive programming. They allow you to perform operations like filtering, mapping, and combining streams.

Can you give me an example of a commonly used operator?

Sure! The map operator is commonly used to transform the items emitted by an observable. For instance, if you have a stream of numbers, you can use map to square each number.

How does the filter operator differ from map?

The filter operator allows you to select only those items from a stream that meet a certain condition, while map transforms each item. For example, filter can be used to emit only even numbers from a stream of integers.

Are there any performance considerations when using these operators?

Yes, using operators can introduce overhead, especially if they create new observables. It's important to use them judiciously and consider the impact on performance, especially in large applications.