摘要: 泛型的定义:泛型是JDK 1.5的一项新特性,它的本质是参数化类型 ParameterizedType,即带有类型参数的类型。 类型参数。 https://www.cnblogs.com/baiqiantao/p/7475696.html 泛型是程序设计语言的一种特性。允许程序员在强类型程序设计语言 阅读全文
posted @ 2018-10-08 22:23 zzfx 阅读(262) 评论(0) 推荐(0)
摘要: Here’s a generic version of the same code: struct Stack<Element> { var items = [Element]() mutating func push(_ item: Element) { items.append(item) } 阅读全文
posted @ 2018-10-08 22:07 zzfx 阅读(371) 评论(0) 推荐(0)
摘要: Relational Algebra Relational Algebra is the mathematical basis for the query language SQL Introduction. So now you have learn how to design good conc 阅读全文
posted @ 2018-10-08 21:40 zzfx 阅读(1240) 评论(0) 推荐(0)