Swift concept with example:
ifLet, guardLet, LazyProperty, Tuple, Higher order function - sort, Higher order function - map, Higher order function - reduce, Higher order function - filter, Any and AnyObject, Attributed string, Trailing Closure, Auto Closure, Escaping Closure, KVC
Sample code:
Swift concept, NSOperation, Dispatch queue and Dispatch group, Device rotation specfic view controller, Local Notification, Common Function, Pop over view controller, KVC & KVO, NSURLSession, CoreData