Dynamic computed properties in Ember.JS deprecated?

Question

I am trying to make an ember application. I have a computed property and the controller looks like this:

// The Controller

Todos.Controller = Ember.Controller.c         


        

Answer 1

It also seems to work ok if you do a reopen:

Todos.todosController = Ember.Controller.create({
    // ** SNIP ** //
});

Todos.todosController.reopen({
    countCompleted: function() {
        return this.get('todos').filterProperty('completed', true).length
    }.property(),
});