Permission denied to access property 'toString'
- by Anders
I'm trying to find a generic way of getting the name of Constructors. My goal is to create a Convention over configuration framework for KnockoutJS
My idea is to iterate over all objects in the window and when I find the contructor i'm looking for then I can use the index to get the name of the contructor
The code sofar
(function() {
constructors = {};
window.findConstructorName = function(instance) {
var constructor = instance.constructor;
var name = constructors[constructor];
if(name !== undefined) {
return name;
}
var traversed = [];
var nestedFind = function(root) {
if(typeof root == "function" || traversed[root]) {
return
}
traversed[root] = true;
for(var index in root) {
if(root[index] == constructor) {
return index;
}
var found = nestedFind(root[index]);
if(found !== undefined) {
return found;
}
}
}
name = nestedFind(window);
constructors[constructor] = name;
return name;
}
})();
var MyApp = {};
MyApp.Foo = function() {
};
var instance = new MyApp.Foo();
console.log(findConstructorName(instance));
The problem is that I get a Permission denied to access property 'toString' Exception, and i cant even try catch so see which object is causing the problem
Fiddle http://jsfiddle.net/4ZwaV/
