Overloading in JavaScript

[Dan Silva]

How does overloading in JavaScript work? I'm trying to do it, but it doesn't seem to like it.

[Bear Bibeault]

It doesn't.

[Eric Pascarello]

Most people will add an object to the end and add any differences there.

function car(make,opts){
 
  var color = "default";
  var doors = 2;
  if(opts){
    if(opts.color)color = opts.color;
    if(opts.doors)doors = opts.doors;
  }
 
  //...
 
}
 
car("cool");
car("fast",{"color":"red"});
car("slow",{"doors":4,"color":"yellow"});

also you can check the arguments.length;

function foo(){
  if(aruments.length==4)alert("green");
  else alert("foo");
}
 
foo(1,2,3,4);
foo(1,2,3,4,5,6);
 

Eric

[Bear Bibeault]

Or check argument types with the typeof operator. But method overloading as it's known in Java does not exist.