Hack Lang : an Introduction @ FB DevC Malang Meetup 2017

A short introduction to Hack programming language and it's HVVM.
Another technology from Facebook.

Transcript

1. Hack Lang : an Introduction by Ardi Imawan @ FB DevC Malang Meetup 2017
2. What is Hack?
3. When you hit facebook.com, or you pull out your phone and get a notification, or basically any interaction that you have with Facebook servers, these servers running hack code Julien Verlague –Facebook Engineer
4. Hack A gradually typed language for HHVM
5. 2 Basic Type of Programming Languages 1. Statically Typed • Java, C#, C++, etc • Steps: • Write code • Check the type • Run correctly Gradually Typed • Hack • You can decide to use which method 2. Dynamically Typed • Javascript, Python, PERL, PHP • Steps: • Write code • Run directly • Ups, something wrong..
6. Let’s try your first code • http://hacklang.org/
7. HHVM : The runtime for Hack Hip-Hop Virtual Machine
8. HHVM : Just In Time Compiler PHP Hack Hip-hop Byte Code (HHBC) X86-64 machine code PHP Zend Opcode EXECUTE Compile (JIT) Interprate
9. Fast Iteration Cycle • Type checker is a daemon (run in background)
10. Features
11. Type Checker Something wrong You may need to change this code Or this one…
12. Error Messages Something wrong You may need to change this code Or this one… Do you remember of Java/C#/C++ ?
13. Async / Await You can interrupt this process I want to wait this async process
14. Async / Await
15. Async / Await What are you thinking now? C# or NodeJS? :D
16. Nullable It can be NULL
17. Nullable It can be NULL Now, kotlin or swift? :D
18. Spaghetti Code : Rendering UI React Native PHP
19. XHP Define custom component Without escaping Use other component Handle as a object
20. All in One
21. Hack Types • Nullable: ?string • Tuples: (int, bool, Object) • Closures: (function(int): int) • Generics: A<T>, foo<T> (T $x): T{ } • Constraints: foo<T as A> (T $x) : T • Co/contravariance: interface X<+T1, -T2>
22. Thanks
23. References • https://www.youtube.com/watch?v=eDz8IbGsVrc • https://docs.hhvm.com