Ember.js: Observing all object properties

Question

I would like to observe all changes on an object properties.
In the following example, i would like to be notified by the personChanged observer if firstname or lastname

Answer 1

What you have there is right using inline observers, but you just have some syntax errors. However it is even simpler to do with the key word observes. So I have tweaked your example a little below.

App.MyObject: Ember.Object.create({
    firstname: 'first',
    lastname: 'last',
    personChanged: function() {
        //firstname or lastname changed
    }.observes('firstname','lastname')
});

Note: I put quotes around the properties

Source: http://emberjs.com/guides/object-model/observers/