$watch'ing for data changes in an Angular directive

Question

How can I trigger a $watch variable in an Angular directive when manipulating the data inside (e.g., inserting or removing data), but not assign a new object to

Answer 1

Because if you want to trigger your data with deep of it,you have to pass 3th argument true of your listener.By default it's false and it meens that you function will trigger,only when your variable will change not it's field.