摘要：
// **************** 函数 *******************func greet(name:String, day:String) -> String{ return "Hello \(name), today is \(day)."}greet("Bob", day:"Tu... 阅读全文
摘要：
创建空数组和空字典var emptyArray = Array()var emptyArray = [Int]()var emptyArray:Array = []var emptyDictionary = Dictionary()var emptyDictionary = [Int:String]... 阅读全文