I don't think that's correct.
Although iirc in that video he talked about which approach works better in which circumstances, as the JVM target isn't optimized entirely yet.
java is simply a Java output that needs to be compiled into something JVM can run. Whereas jvm target goes there directly. Which is faster to compile, and also possibly faster to run, as there could be optimizations that aren't doable from the Java code.Although iirc in that video he talked about which approach works better in which circumstances, as the JVM target isn't optimized entirely yet.
In either case
hashlink/C vs vm one is not a good analogy. VM will be JIT I think, whereas C won't, as it doesn't need to be. With JAVA it's always just VM, there's no native compilation anywhere.
Interesting! It seems it was true about run-time performance...I'm not sure which video I watched yesterday, but it was from a pre-4-release time, and there the speaker had claimed that the JVM target was faster both at compile time and at run-time. Maybe that was incorrect or maybe things have changed since then as the feature was worked on further. Thanks for pointing to the new video ( https://haxe.org/videos/conferences/haxeup-sessions-2019/simon-krajewski-haxe-status-report.html if anyone's looking for this later ) OK, good to know...thanks, everyone! :)
It's basically skipping the
.java abstraction layer and going directly to bytecode.
In my 2 lines notes about that part I wrote " -D jvm produces a .jar with .class bytecode. No need for javac = much faster compilation time", I think I misunderstood javac. So if I understand what you said with
-D jvm it should skip the step of producing the java sources, directly writing java bytecode
hence the part about the 'Waneck functions', apparently they're a mess but provide some optimizations not yet available with -D jvm
Hi, I'm having a hard time wraping my head around enum abstracts use cases.
With this simple example:
enum abstract EConfiguration(String) from String to String{
var Debug;
var Shipping;
var Test;
}I want to be able to do:
var config:EConfiguration = "Debug";Which works, but the following works aswel...:
var config:EConfiguration = "Debugtypo";How can I restrict it to declared fields, throwing on value error ?
I just want to add that such approach is only useful if you have input unknown-at-compile-time and indeed want to check it for validity. If you just want to use it as Enum, and for some reason need it to be String,
var config:EConfiguration = Debug; will work best. Without using from String.
@Antriel Yep it's the former, runtime string -> valid enum
hum I wonder if switch case would not be enough
how to write unit tests for simple AST parsers would be the underlying question I guess
or you make a printer for your AST and then you compare expected vs actual string representation
How can i compile this library https://lib.haxe.org/p/crypto/
for Actionscript ?
as a SWC
would i create an abstract array type that wraps overtop of a conditionally compiled array ?
something like this
private typedef Impl<T> = #if cs cs.NativeArray<T> #else Array<T> #end;
abstract MyArray<T>(Impl<T>) {
public inline function new() this = #if cs new cs.NativeArray() #else new Array() #end;
public inline function push(v:T):Int return #if cs this.Add(v) #else this.push(v) #end;
}
Looks like I'll prob be going down this road then- really want performance in this particular bit of code and CS target currently creates Array<object> for any type, boxing and unboxing things. Whereas if you use NativeArray it doesn't do that.
Thank you so much @kevinresol ! You're a lifesaver once again!
Hello,
I've JSON data, that contains a questions with 2 items that look similar but whom options and answer field vary depending on type.
"questions": [{
"type": "qcm",
"options": ["Product 1", "Product 2", "Product 3"],
"answer": [false, false, false,]
}, {
"type": "numeric",
"options": null,
"answer": 546
}]How can I model those 2 types of question using typedef?
So far I did:
typedef Questionnaire = {
survey:Survey,
questions:Array<Question_Choix_Multiple, Question_Numeric>,
}But then I got
src/Main.hx:28: characters 12-60 : Invalid number of type parameters for Array
the result will be something like this:
enum Question {
Qcm(options:Array<String>, answer:Array<Bool>);
Numeric(options:Null<Any>, answer:Int);
}
Here is the compilable code (with
-lib tink_json)class Main {
static function main() {
var json = '{ "questions": [{
"type": "qcm",
"options": ["Product 1", "Product 2", "Product 3"],
"answer": [false, false, false]
}, {
"type": "numeric",
"options": null,
"answer": 546
}]}';
var result:Obj = tink.Json.parse(json);
trace(result.questions[0]);
trace(result.questions[1]);
}
}
typedef Obj = {
questions:Array<Question>,
}
enum Question {
@:json({'type': 'qcm'}) Qcm(options:Array<String>, answer:Array<Bool>);
@:json({'type': 'numeric'}) Numeric(options:Null<String>, answer:Int);
}