AngularJS GlobalCtrl vs $rootScope vs Service

Question

I am confused on a couple of things with Globals in Angular. Below is my pseudo code.

1) With the way I have my GlobalCtrl placed, I am able to reference my $scope.modal

Answer 1

Generally speaking global variables are considered bad practice, as they don't encourage encapsulation, make debugging difficult, and promote bloated code. Here's a good discussion of global variables: http://c2.com/cgi/wiki?GlobalVariablesAreBad.

A good rule of thumb is to add properties and methods to the most local scope possible and use services to share data between modules.