difference between session and cookies in ruby on rails

It seems like your question is about the difference between sessions and cookies in Ruby on Rails, which is not directly related to the content presented at WWDC. However, I can provide some information about sessions as discussed in the context of the "What’s new in location authorization" session at WWDC.

In the context of CoreLocation in iOS, sessions are used to manage the lifecycle and authorization of location services. Here are some key points from the session:

1. Session Objects: These objects tell CoreLocation what your app needs, rather than what to do. This helps in managing authorization even if the app is backgrounded or terminated.
2. Implicit vs. Explicit Sessions: Implicit sessions are created automatically when iterating live updates or events, while explicit sessions need to be created manually and are used for more specific authorization needs.
3. Session Lifecycle: Sessions are tied to user-facing features and interact with the app's lifecycle. They can continue running in the background and even after the app is terminated, ensuring that the app's authorization goals are maintained.

For more detailed information, you can refer to the session chapter on "Session lifecycle" starting at 09:25 in the "What’s new in location authorization" session.

If you have any specific questions about the content presented at WWDC, feel free to ask!