Method overloading

overload.js

function overload(functions) {
  return function() {
    functions[arguments.length].apply(this, arguments);
  }
}

function List() {
}

List.prototype.add = overload([
 function(){ console.log("no args", [this, arguments])},
 function(title){ console.log("1 arg", [this, arguments])},
 function(title, priority){ console.log("2 args", [this, arguments]);}
]);

var list = new List();
list.add();
list.add("Do something");
list.add("Do something else", "high");

Yep. Não gosto também.