Question

Given a function, is there a way to find out the object that holds it?

var dog = { 
  bark: function() { alert('dfd') },
  name: 'Bill'
}

function getNameFromBark(barkFunc){
   //How to implement this method?
}

getNameFromBack(dog.bark); //I would like this to return Bill.

Answer 1

Why not just dog.name?

Functions can be bound to an object. It can access the properties of that object using the this keyword. You can rebind functions with the bind function, which changes the value of this.

There is no way that I know of to ask a function what it is bound to.

like:

var my_func = dog.bark; // removing `dog` from the reference
my_func.getBoundObject().name; // would return Bill