我只是喜欢研究更多的东西，而不是Swift编程的基础知识，而且实际上注意到字典非常熟悉。如果您知道的话，您想向我解释一下这些代码编程的真正含义和名称吗？
代码结果：
// MARK: Dictionaries
var Weather = [String: String]()
Weather["Sunday"] = "Sunny"
// MARK: What does this with angle bracket syntax is called?
// Notice: It's seems familar to Dictionaries.
var Total_Miles = Dictionary<String, Int>()
Total_Miles["Antonio"] = 100
谢谢您带来的帮助！ :)
[String: String]is syntactic sugar forDictionary<String, Int>.Dictionary<String, Int>is just a simple example of a generic type.Dictionaryhas two generic type parameters, calledKeyandValue.In the general case,
Dictionaryisn't just one data type. It's like a pattern for establishing data types, one per unique set of type parameters provided asKeyandValue.Dictionary<String, Int>is a specific type, aDictionarywhoseKeytype isString, and whoseValuetype isInt.In both cases, the trailing
()are a call to an initializer, syntactic sugar for[String: Int].init()andDictionary<String, Int>.init(), respectively.