In his session, Thinh will conduct a seminar on Relactive Programming – an asynchronous programming paradigm concerned with data streams and the propagation of change.

1. April 2018
www.asiantech.vn
D E V D A Y
2 0 1 8

2. STUDIED AT DA NANG UNIVERSITY OF
SCIENCE AND TECHNOLOGY
TECHNICAL LEADER AT ASIAN TECH
ME
2
NAME: UNG VĂN THỊNH
PLATFORM: iOS

3. April 2018
www.asiantech.vn
R E A C T I V E
P R O G R A M M I N
G

4. SLIDE
4

5. PROGRAMMING PARADIGMS
SLIDE
5
A way to classify programming languages based on their features

6. Concept
SLIDE
6
IMPERATIVE
PROGRAMMING
Uses statements that change a program's state
Telling the “machine” how to do something, and as a result what you want to
happen will happen
Most widely used paradigm

7. Concept
SLIDE
7
DECLARATIVE
PROGRAMMING
Expresses the logic of a computation without describing
its control flow
Describes what you want to do, and not how you want to do it

8. THE RISE OF
DECLARATIVE
PROGRAMMING
SLIDE
8
MINIMIZE MUTABILITY
REDUCE STATE SIDE-EFFECTS
LEAD TO MORE UNDERSTANDABLE
AND MORE SCALABLE CODE

9. REACTIVE PROGRAMMING
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9
Reactive

10. Definition
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10
REACTIVE
PROGRAMMING
Reactive programming is programming with asynchronous data streams

11. Example
SLIDE
11
REACTIVE
PROGRAMMING

12. STREAM
CENTRAL OF REACTIVE
VARIABLES, USER INPUTS,
PROPERTIES, CACHES, DATA
STRUCTURES, ETC.
OVER TIME
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12
AbstractionREACTIVE
PROGRAMMING

13. Observable/Observer
SLIDE
13
REACTIVE
PROGRAMMING
Observable
Observer
Observer
onNext()
onError()
onCompleted()

14. Operator
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REACTIVE
PROGRAMMING
Transform a stream to other stream
map()
reduce()
filter()
etc.

15. VS Traditional programming
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15
REACTIVE
PROGRAMMING
var a = 1
var b = 2
var c = a + b
print(c)
let a: Variable<Int> = Variable(1)
let b: Variable<Int> = Variable(2)
let c = Observable.combineLatest(a, b)
c.subscribe { (value) in
print(value)
}
// c = 3
a = 5
print(c)
// c = 3
// c = 3
a.value = 5
// c = 7
{ $0 + $1 }

16. ASYNCHRONOUS
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AdvantageREACTIVE
PROGRAMMING
Thread 1Thread 2Thread 3
Main ThreadobserveOn()
updateView()

17. ASYNCHRONOUS
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AdvantageREACTIVE
PROGRAMMING

18. USER INTERACTION
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AdvantageREACTIVE
PROGRAMMING

19. USER INTERACTION
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AdvantageREACTIVE
PROGRAMMING

20. EXTENSIBILITY
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AdvantageREACTIVE
PROGRAMMING
Example:
- Array of Int
- Take 3 first elements
- Less than 10

21. DATA BINDING
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AdvantageREACTIVE
PROGRAMMING

22. SLIDE
22
extensionsREACTIVE
PROGRAMMING
RxJava
RxJS
RxRuby
RxSwift
RxPHP
Etc.

23. PROGRAMMING TRENDING
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BENEFIT OF REACTIVE
PROGRAMMING
WHAT IS REACTIVE
PROGRAMMING
EXTENSIONS
ReviewREACTIVE
PROGRAMMING

24. SLIDE
24
REACTIVE
PROGRAMMING
Are you ready to adopt this programming paradigm?

25. THANKS!
Any questions?
You can contact me:
Mail: thinh.ung@asiantech.vn
Phone: 097 9476275
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