raywenderlinch tutorial
#Learned:
- Core Data
- Core Location
- LocationManager
- nsmanagedobjectcontext - persistentContainer
- fetch request / NSFetchedResultsController(update tableview)
- read-only computed properties
- Implicitly Unwrapped Optionals (!)
- lazy loading
- didSet
- extension
- weak vs strong
- capture list [weak self] in closure (memory leak) ...