My haxe presentation for DevClub

1. Haxe
Cross-platform in French
Sergei Egorov / @bsideup
0

2. About me
Senior Server Developer at Creative Mobile
Haxe user since 2008
Introduced Haxe in our company

3. What is Haxe?
First release in April 2006
Open source language
Strictly typed
Developed by Nicolas Cannasse
(Well known in Flash community thanks to MTASC compiler)

4. Why Haxe is cool?
Cross-platform OOP language
Good syntax
Provides good API for extending language
Generates sources for target language
Big community
Haxelib - repository for your Haxe libs
online REPL try.haxe.org

5. Who thinks Haxe is cool?

6. Meet my hipster friend
and he don't trust me that Haxe is cool

7. "But why?" I said. Look at it:
var arr = [for (i in 0...10) if (i%2==0) i];
var value = 1;
function myLocalFunction(i) : {num: Int} {
return if(i % 2 == 0) {
{num : value + i};
} else {
{num : value};
};
}
trace(myLocalFunction(arr[1]).num); // 3

8. Why I need another JavaScript?

9. It's not JS! We have classes:)
interface Placeable<T> {
public var x:T;
public var y:T;
}
class Main implements Placeable<Float> {
public var x:Float;
public var y:Float;
public function new() {
trace("I'm constructor!");
}
}

10. OOP is so old-school. I want more!

11. How about abstract types?
abstract StringSplitter(Array<String>) {
inline function new(a:Array<String>)
this = a;
@:from
static public inline function fromString(s:String) {
return new StringSplitter(s.split(""));
}
}
var splitter:StringSplitter = "Hello";
trace(splitter); // [H,e,l,l,o]

12. I don't get it. Anything else?

13. Static extensions?
class IntExtender {
static public function triple(i:Int) {
return i * 3;
}
}
using IntExtender;
trace(12.triple());

14. Not bad, no need to use prototypes.

15. We have algebraic data types too
enum Color3 {
Red;
Green;
Blue;
Rgb( r : Int, g : Int, b : Int );
Alpha( a : Int, col : Color3 );
}
function toInt( c : Color3 ) : Int {
return switch( c ) {
case Red: 0xFF0000;
case Green: 0x00FF00;
case Blue: 0x0000FF;
case Rgb(r,g,b): (r << 16) | (g << 8) | b;
case Alpha(a,c): (a << 24) | (toInt(c) & 0xFFFFFF);
}
}

16. Ok. Not so bad. Another JavaScript generator.

17. Not JS only.
It's cross-platform!

18. How many languages do you know
who can be compiled to:

19. JavaScript

20. Java?

21. C/C++?

22. C#?

23. Objective-C?

24. Python?

25. PHP?

26. ActionScript?

27. All of them!

28. Cross-platform
Haxe Others

29. Conditional compilation
for platform-specific code
#if flash8
// Haxe code specific for flash player 8
#elseif flash
// Haxe code specific for flash platform (any version)
#elseif js
// Haxe code specific for javascript plaform
#elseif neko
// Haxe code specific for neko plaform

30. Platform-specific magic functions
//ActionScript: Valid reference
untyped __global__["flash.display.DisplayObject"];
// JavaScript: Call code
untyped __js__("Navigator.plugin["Shockwave Flash"]");
// PHP: value of $_SERVER['REQUEST_METHOD']
untyped __var__('_SERVER', 'REQUEST_METHOD')
// C#
var str:String = "test untyped";
untyped __cs__("System.Console.WriteLine(str)");
// Java
untyped __java__("java.lang.System.out.println(str)");

31. STD lib for each target platform
cpp.Lib
flash.Lib
java.Lib
js.Lib
php.Lib
...

32. Nothing is perfect.

33. Yes! So...

34. Haxe shortcomings
Not-so-good IDE support:
Good support in FlashDevelop (Windows only)
Limited support in IntelliJ IDEA for all platforms
Few other IDEs like FDT
Verbosity (i.e. no short lambdas)
Written in OCaml:)

35. Haxe
at Creative Mobile

36. Drag Racing Social

37. Drag Racing Social
Simulation library port from Java to Haxe
Main functionality in game
Same simulation code base for client and server
Not afraid of floating point
Good performance!

38. One more thing

39. Gradle Haxe plugin!
Created by me:)
Compile Haxe with Gradle build system
Basic haxelib support
Multi-target aware
Source code:
https://github.com/bsideup/graxe

40. Example configuration
haxe {
targets {
swf {
mainClass "TestSwf"
}
java {
mainClass "TestJava"
}
}
}
dependencies {
compile project(":libraryModule")
compile haxeLib("tjson", "1.2.3")
}

41. Demo

42. Questions?