Is there a way to pass a primitive parameter by reference in Dart?

Question

I would like to pass a primitive (int, bool, ...) by reference. I found a discussion about it (paragraph \"Passing value types by reference\") here: value types in Dart, bu

Answer 1

As dart is compiled into JavaScript, I tried something that works for JS, and guess what!? It worked for dart!

Basically, what you can do is put your value inside an object, and then any changes made on that field value inside that function will change the value outside that function as well.

Code (You can run this on dartpad.dev)

main() {
  var a = {"b": false};
  
  print("Before passing: " + a["b"].toString());
  trial(a);
  print("After passing: " + a["b"].toString());
}

trial(param) {
  param["b"] = true;
}

Output

Before passing: false
After passing: true