Store findBy always returns -1

Hi,

why is the findBy method always returning -1, which means no record could be found. I think I'm doing something wrong :/

code snippet:

Code:

---

var index = store.findBy(function(record,id){
  return true;
});

---

This should always return the index of the first element. What is the proper way of using the findBy method?

Fixed it by myself. The 'store' variable was not properly initialized :/