Thanks. But I was under the assumption that each controller will have a
separate scope. I'm not using nested controllers. If this is a valid
assumption, then why should modifying the scope of one controller effect
the other?

On Thu, Apr 2, 2015 at 1:49 AM, Sander Elias <[email protected]> wrote:

> Hi,
>
> You are right. This is because of $scope.$apply That’s the reason you
> should use it as sparingly as possible. an $apply will make sure that
> every watch in your application is fired at least once. The reason is, that
> in your eventBCallback you might have changed something that otherwise
> might get unnoticed, (lets assume you add a new module to the modules
> array (yeah I know that isn't easy possible,but angular does not!)) and
> therefore the filters need too be fired also.
>
> If you are really sure that what you are doing in your evenBCallback does
> not affect other places, but indeed only the local scope, you can sue
> $scope.$digest() in stead of $scope.$apply, but you better be sure you
> know what you are doing!
>
> Regards
> Sander
> ​
>
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