Laurence Wingo questions

• In Swift, does a protocol extension allow function bodies?
• Assigning a Variable to an Underscore in Swift
• Value of type 'String' has no member 'range' in Swift
• Using UNUserNotificationCenter for iOS 10
• Why does XCTestCase override the setup method of XCTest?
• How is the setUp() method called before the invocation of each test method?
• Error: Value of type string has no member componentsSeparatedByCharactersInSet
• Is a protocol either a reference or value type in Swift?
• Caught NSInternalInconsistencyException request for rect at invalid indexPath
• expression pattern of type 'CountableClosedRange<Int>' cannot match values of type 'Int'?

Laurence Wingo answers