addArrayObserver (target, opts) Ember.Arraypublic
Defined in packages/ember-runtime/lib/mixins/array.js:460
Adds an array observer to the receiving array. The array observer object normally must implement two methods:
arrayWillChange(observedObj, start, removeCount, addCount) - This method will be called just before the array is modified.
arrayDidChange(observedObj, start, removeCount, addCount) - This method will be called just after the array is modified. Both callbacks will be passed t