Rx JS basics
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Rx JS is a very hot topic in nowadays market and uses about declarative style of programming to avail event based synchronous or asynchronous results based on event emitted by event emitters i.e. Observable.
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Rx JS basics
- 1. RX JS Basics Rx JS is a declarative style of programming based on event emitters. - Vinay Prajapati
- 2. We’ll Cover Functional Programming Reactive Programming What is RxJS Important Terminologies Observable types Subject Operators
- 3. Functional Programming Declarative Vs Imperative Programming Pure functions Higher Order / First class Functions Recursion
- 4. Reactive Programming follows declarative programming paradigm Works on data streams
- 5. What is RX JS? Declarative style of programming Supports Functional Programming Event / event stream based Lazy push Based (Observable)
- 6. Important terminologies Observable Observer Subscription Operators (Instance Vs static) Subject Schedulers
- 7. Hands On
- 8. Observable Types Cold Observable Hot Observable Warm Observable Unicast / Plain Observable Multicast Observable
- 9. Subject - What is a Subject - Observer + Observable at the same time - Examples
- 10. Hands On
- 11. Operators What is Operator Creating an Operator Instance vs Static operator Quick review of some operators
- 12. Hands On
- 13. Thanks
Editor's Notes
- Quote – RX js is Lodash of event.
- While in reactive programming any change in value of b and c will update value of a
- Q – Difference between Pull Vs Push based systems? Promises are push based . May or may not return one value Observables push based. May return 0 to infinite values
- Observers are just objects with three callbacks, one for each type of notification that an Observable may deliver. Next, Error and Complete What is a Subscription? A Subscription is an object that represents a disposable resource, usually the execution of an Observable. Subject – Observable + Observer. Multicasts the value to multiple observers Few examples on same:- Creating Observable Creating an Observer Creating a subscription Closing a subscription Subject Skip schedulers as an excercise
- Observable, Observer, subscription, subscribing & Cancelling a subscription
- Observable, Observer, subscription, subscribing & Cancelling a subscription
- Operators - Operators are methods on the Observable type. When called, they do not change the existing Observable instance. Instead, they return a new Observable, whose subscription logic is based on the first Observable.
- Observable, Observer, subscription, subscribing & Cancelling a subscription
- Observable, Observer, subscription, subscribing & Cancelling a subscription