AngularJS Tutorial - Understanding $apply and $digest (in depth)
-What is $apply
-What is $digest
-$apply vs $digest
-When is Angular JS digest cycle invoked and when not
-How to kick-in Angular JS digest cycle manually
-How to work with events external to Angular JS (Context)
-How to modify scope variables from jQuery (or external) events
-How to update DOM when scope variables are modified outside Angular JS (Context)
-How to update DOM when using jQuery events in Angular JS
-Using $apply and $digest in Custom Directives
-How do $apply and $differ in ng-repeat