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Hack Lang : an Introduction @ FB DevC Malang Me...
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DOT Indonesia
September 23, 2017
Programming
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Hack Lang : an Introduction @ FB DevC Malang Meetup 2017
A short introduction to Hack programming language and it's HVVM.
Another technology from Facebook.
DOT Indonesia
September 23, 2017
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Transcript
Hack Lang : an Introduction by Ardi Imawan @ FB
DevC Malang Meetup 2017
What is Hack?
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
Hack A gradually typed language for HHVM
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..
Let’s try your first code • http://hacklang.org/
HHVM : The runtime for Hack Hip-Hop Virtual Machine
HHVM : Just In Time Compiler PHP Hack Hip-hop Byte
Code (HHBC) X86-64 machine code PHP Zend Opcode EXECUTE Compile (JIT) Interprate
Fast Iteration Cycle • Type checker is a daemon (run
in background)
Features
Type Checker Something wrong You may need to change this
code Or this one…
Error Messages Something wrong You may need to change this
code Or this one… Do you remember of Java/C#/C++ ?
Async / Await You can interrupt this process I want
to wait this async process
Async / Await
Async / Await What are you thinking now? C# or
NodeJS? :D
Nullable It can be NULL
Nullable It can be NULL Now, kotlin or swift? :D
Spaghetti Code : Rendering UI React Native PHP
XHP Define custom component Without escaping Use other component Handle
as a object
All in One
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>
Thanks
References • https://www.youtube.com/watch?v=eDz8IbGsVrc • https://docs.hhvm.com