Reactive programming

Reactive programming is like playing with Legos. Let's say we have a big box of Legos with different shapes and sizes. We can build different things by putting them together in different ways.

In reactive programming, we also have building blocks called "streams." Streams are like channels of data that flow continuously. Just like the water in a river flows continuously, the data in a stream flows continuously.

We can create streams from different sources, like mouse clicks, keyboard inputs, or data from a web server. We can then combine these streams, just like we can combine different Lego pieces to build something new.

For example, let's say we have a stream of mouse clicks and a stream of keyboard inputs. We can combine these two streams to create a new stream that only emits values when the user clicks and types at the same time.

The cool thing about reactive programming is that we can react to changes in real-time. Just like how we can see our Lego creations come to life as we build them, we can see our application come to life as we react to changes in different streams.

Reactive programming is used in many different applications, like web development, mobile app development, and even in financial systems. It allows developers to write code that is more efficient, easier to understand, and easier to maintain.