To find duplicates, you could build cross reference by phone number, then filter that down to duplicates only. For example, consider: let contacts = [ Contact(name: “Rob”, phone: “555-1111”), Contact(name: “Richard”, phone: “555-2222”), Contact(name: “Rachel”, phone: “555-1111”), Contact(name: “Loren”, phone: “555-2222”), Contact(name: “Mary”, phone: “555-3333”), Contact(name: “Susie”, phone: “555-2222”) ] You can build the cross … Read more
As most of these answers don’t actually get at the substance of the question, merely the intention, perhaps this will help: As far as I can tell the only difference between a Linked List and a Circular Linked List is the behavior of iterators upon reaching the end or beginning of a list. A very … Read more
the OS sends a SIGKILL which is not a crash – Apple session on privacy in iOS6 says: If permissions changes, app is quit. Background task expiration handler is called, if registered iOS then kills the application. WWDC 2012 Session Videos: Privacy Support in iOS and OS X Expiration handler: beginBackgroundTaskWithExpirationHandler There is no way … Read more