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RxSwift
- 1. RxSwift Introduction to reactive programming Kristaps Grinbergs @fassko
- 3. Imperative programming ● Saved state ● Order of execution ● Side effects
- 4. In computing, reactive programming is a programming paradigm oriented around data flows and the propagation of change. Wikipedia
- 5. Reactive programming is programming with asynchronous data streams
- 6. Reactive programming ● Asynchronous ● No saved state ● Functional ● Responsive
- 7. ReactiveX An API for asynchronous programming with observable streams. ● Microsoft (Rx.NET) - 2009 ● Many languages ● RxSwift - 2015
- 8. Rx components ● Observable ● Observers ● Schedulers
- 16. RxMarbles
- 20. Rx extensions Almost for everything
- 21. + Agile and reusable code Thread safety Eliminate state from code Testing Well tested, with large community and extensions
- 22. - Steep learning curve Change previous practices Debugging Over-reactive
Editor's Notes
- Almost one year back I made my first app using reactive programming library RxSwift.
- It's always hard to start and especially about this kind of topic. Batman - superhero. Some of you might think what is reactive and why is it needed. I hope after this presentation some of you would start thinking that it can be useful in your everyday tasks.
- Imperative programming is a programming paradigm that uses statements to change the program’s state. Much like you would use imperative language while playing with your dog — “Fetch! Lay down! Play dead!” — you use imperative code to tell the app exactly when and how to do things. Saved state: State in variables Side effects: Changing the value of a variable; Writing some data to disk Enabling or disabling a button in the User Interface Hard to achieve all these things if the app is asynchronous.
- https://en.wikipedia.org/wiki/Reactive_programming
- https://gist.github.com/staltz/868e7e9bc2a7b8c1f754 https://medium.com/@kevalpatel2106/what-is-reactive-programming-da37c1611382#.71s5y6op7
- ReactiveX is a library for composing asynchronous and event-based programs by using observable sequences.
- Observable: Observable are nothing but the data streams. Observers: Observers consumes the data stream emitted by the observable. Schedulers: Remember that Rx is for asynchronous programming and we need a thread management. ReactiveX provides a collection of operators with which you can filter, select, transform, combine, and compose Observables. This allows for efficient execution and composition.
- For example, imagine your Twitter feed would be a data stream in the same fashion that click events are. You can listen to that stream and react accordingly.
- Data streams consists of: Next Completed Error
- Observers can: filter Transforming Combining
- Operators can be chained together Buffer by time component, for instance search
- RxCocoa is companion library for dealing with UI. Text labels Text fields Table views, collection views More sophisticated like navigation
- Community created extensions databases like Realm Firebase Can create your own
- Many times during this year I was in both states. But I think it's fine and need to keep learning.
- https://medium.com/airbnb-engineering/moving-airbnb-search-to-react-b85b815e166c#.ijqenl9wq https://www.bobthedeveloper.io/blog/getting-started-rxswift-with-bob