benifit: 1.make developers extremely productive is code reuse, which is the ability to derive a class that inherits all of the capabilities of a base class. The derived class can simply override virtual methods or add some new methods to customize th…
Python Standard Library "We'd like to pretend that 'Fredrik' is a role, but even hundreds of volunteers couldn't possibly keep up. No, 'Fredrik' is the result of crossing an http server with a spam filter with an emacs whatsit and some other stuff be…
概述 Generics - This long-awaited enhancement to the type system allows a type or method to operate on objects of various types while providing compile-time type safety. It adds compile-time type safety to the Collections Framework and eliminates the d…