Is there any way to prevent replacement of JavaScript object properties?

Question

I would like to make an object\'s structure immutable, preventing its properties from being subsequently replaced. The properties need to be readable, however. Is this possi

Answer 1

the best thing you can do is hide your properties inside of a closure.

var getMap = function(){
  var hidden = "1";
  return {
    getHidden : function() { return hidden; }
  }
}

var f = getMap ();

alert(f.getHidden());

I took a stab at it. In the above code you will need to not just return hidden but copy it into a new object perhaps. maybe you can use jquery's extend to do this for you, so you will be returning a new object, not the reference. This may be completely wrong though =)