Programming VIP

Concept of polymorphism Different types of objects respond differently to the same message, which is called polymorphism. Generally speaking, it is to complete a certain behavior. When different objects complete it, they will produce different results For example, if you go to an Internet cafe to get online, if you are a vip, the pri ...

For the first time, I posted a blog. The whole layout is not very beautiful. Recently, I have been studying Dart (the soul of fluent. I think it doesn't make much sense to just do components). It may be that there are too many scientific Internet access, and Google is a little deep. Therefore, make some useful things into a document, write some ...

Relationship between class and interface Relationship between class and class Inheritance relationship can only be inherited in single layer, but it can be inherited in multiple layersRelationship between class and interface The implementation relationship can be implemented alone or multiple, and multiple interfaces can be implemented while i ...

preface Interface: a contract (or specification) that can define methods, properties, indexers and events, but cannot set specific values;The interface is born for decoupling ("high cohesion, low coupling", convenient for unit testing);The attributes and methods defined by the interface need to be fully implemented during inher ...