摘要：
func repeatItem(item:Item, numberOfTimes:Int) -> [Item]{ var result = [Item]() for _ in 0..<numberOfTimes{ result.append(item) } return result}... 阅读全文
摘要：
protocol ExampleProtocol{ var simpleDescription:String{get} mutating func adjust()}class SimpleClass:ExampleProtocol{ var simpleDescription:String ... 阅读全文