javascript variable reference/alias

Question

Is it possible in javascript to assign an alias/reference to a local var someway?

I mean something C-like:

function foo() {   var x = 1;   var y = &x;   y++;   alert(x); // prints 2  } 

= EDIT =

Is it possible to alias arguments.callee in this code?:

function foo() {   arguments.callee.myStaticVar = arguments.callee.myStaticVar || 0;   arguments.callee.myStaticVar++;   return arguments.callee.myStaticVar; } 

Answer 1

In JavaScript, primitive types such as integers and strings are passed by value whereas objects are passed by reference. So in order to achieve this you need to use an object:

// declare an object with property x var obj = { x: 1 }; var aliasToObj = obj; aliasToObj.x ++; alert( obj.x ); // displays 2 

Answer 2

To some degree this is possible, you can create an alias to a variable using closures:

Function.prototype.toString = function() {     return this(); }  var x = 1; var y = function() { return x } x++; alert(y); // prints 2, no need for () because of toString redefinition