Passing arguments to a Lua function with Luaj

[Anonymous]

Hey guys

I have kind of a newbie question here, but I couldn't find an answer anywhere so far. I posted it on Stackoverflow: http://stackoverflow.com/questions/14504300/passing-arguments-to-a-lua-function-with-luaj

It would be awesome to get some help here!

Thanks!

[James Roseborough]

In lua, the top-level scope is an anonymous function with variable arguments. These are accessed using ... In your example, you don't need the function named something, the chunk itself can be used as an unnamed function.

For example, this code in luaj-3.0-beta1

String script = "argument = ...\n"+
 "test_string = 'Hello World!'\n"+
 "print(test_string)\n"+
 "print(argument)\n";

Globals globals = JsePlatform.standardGlobals();
LuaValue chunk = globals.loadString(script, "myscript");
chunk.call( LuaValue.valueOf("some-arg-value") );

Produced this result for me:

Hello World!
some-arg-value

You can pass in any number of arguments this way.

[David Ryan]

Is it possible to set variables in Lua from Java? For instance:

String script = "print(a)";
InputStream is = new ByteArrayInputStream(script.getBytes());
Globals globals = JsePlatform.standardGlobals();
Prototype p = globals.compilePrototype(is, "script");
LuaClosure f = new LuaClosure(p,globals);
// set variable a here?
f.invoke();

I tried f.set("a","test");

However, got the error:

org.luaj.vm2.LuaError: index expected, got function

Thanks,
David.