Reactive Programming.md

REACTIVE PROGRAMMING

What is Reactive Programming?

It is a Programming paradigm that works with asynchronus data streams Data Streams can be created by many things

• UI Events
• Http Requests
• File Systems
• Array-like Objects
• Memory / Cache

What is a Stream?

• It is a sequence of ongoing events ordered in time
• Emits a value, error and complete signal

Observables

• Observables are used to watch these streams and emit functions when value, error or completed signal is returned
• Observables can be subscribed to by an observer
• Observables will constantly watch streams and will update accordingly
• We can interact with data streams as any regular array

Reactive Extensions / ReactiveX

• A library for composing asynchronus programs by using observable sequences
• Provides a long list of operators which allow us to filter, select, transform, combine and compose observables