can monkeyc pass parameters by reference ?

Former Member over 8 years ago

I'm trying to pass variables by reference. eg

function a(x,y) {
x = 23;
y = 15;
}

function dummy() {
var xx,yy;
a(xx,yy);
}

so that xx and yy will have the values assigned by function a.

In pascal you would use procedure a(var x,y: Integer); and in C you would have void a(int &x,&y); but how is this done in monkeyc ?

I couldnt find anything in the docs that even indicates passing by reference can be done, but I'm hoping it can.

TIA Andrew

Former Member over 8 years ago

No can do... you could

function a(x) {

  x[0] = 23;

  x[1] = 15;

}



function dummy() {

  var xx,yy;

  var tmp = [0, 0];

  a(tmp);

  xx=tmp[0];

  yy=tmp[1];

}

or better

class xyz {

  var xx, yy;



  function initialize(x,y) {

    xx = x;

    yy = y;

  }

}



function dummy() {

  var x = new xyz(23,15);

}

but honestly the pass by reference thing seems like a bad pattern, not knowing your application though I can't suggest a better way.

Former Member over 8 years ago

Ok, thanks for that. I suspected that may be the case and had the class method in the back of my mind.

Former Member over 8 years ago

If you're just looking for a way to return two values, I have used this technique:

function a() {

  return [23, 15];

}



function dummy() {

  var retVal = a();

}