apex base

SummaryVirtual base class1. A class can be used as either a virtual base class or a non-virtual base class in a class family.2. In a derived class object, a virtual base class with the same name only produces one virtual base class sub-object, while a non-virtual

Base:It is used to implement access to the public or protected members of the base class in a derived class, but is limited to constructors, instance methods, and instance attribute accessors.The specific features summarized in msdn include:(1) Call methods that have been overwritten by other methods on the base class.(2) Specify the base class constructor to cal

Because c ++ allows many inheritance, the problem of ambiguity arises: Multiple derived Classes define methods with the same name, then, when the main function calls this method through the base class, the compiler will be hard. Because it does not know which method in the derived class you want to use. Now there is another question: if there are two Derived classes deriveda and derivedb, one of their methods with the same name has a parameter, and t

Linux Kernel base tree Application Analysis LInux kernel base tree Application Analysis-- Lvyilong316 The base tree can be seen as a trie tree with binary strings as keywords. It is a multi-tree structure similar to a multi-layer index table, each intermediate node contains an array of pointers pointing to multiple nodes, and the leaf node contains pointers poin

Base stationtime limit: 20000/10000 ms (Java/others) memory limit: 512000/256000 KB (Java/others) submitstatisticnext problemproblem description In the mobile communication system, the establishment of a communication network is mainly completed by a base station. Base stations can be divided into base stations and s

1. Reasons: When implementing polymorphism, when using a base class pointer to manipulate a derived class, prevent only the destructor of the base class without the destructor of the derived class at the time of the destructor. 2. Example: (1), #include Run Result: Do something in class derived! Output from the destructor of class derived! Output from the destructor of class

There is an assignment-compatible relationship between the base class and the derived class object, because the derived class contains members that inherit from the base class, in the following respects, the required friend can refer to the only common derived class that is the true subtype of the base class, which completely inherits the functionality of the

The base member function that calls reverse_iterator can generate a "corresponding" iterator. However, this sentence is a bit disappointing. For example, let's take a look at this code. First, we put the numbers 1-5 into a vector, and then generate a reverse_iterator pointing to 3. The base of reverse_iterator initializes an iterator: Code highlighting produced by Actipro CodeHighlighter (freeware)http://ww

Newlife. xcode uses generic base classes in a large number of places, which were previously confusing and understandable. I have compiled a document before the Spring Festival, summarized the knowledge of generic base classes, and shared it with others. Most of the content in this article is excerpted from the introduction of xcode and the following two articles, which are just as follows: Http://www.cnblog

[TOC]When a templated class is used as a base class, there are areas to be aware of. As an example, suppose you now write a program that sends information to a different company, the information is either translated into a password, or it is the original text, during compilation to determine which company to send to which company, using the template method: classcompanya{ Public:voidSendcleartext (Const STD::string msg);voidSendencryted (Const STD:

ObjectiveThis article mainly to explain in C #, I feel that the master is not good or not much, not too familiar with the keywords, mainly including base, this, new, override, abstract, Virtual and execution issues between the static field and the static constructor.Base keywordbase keyword is used to access members of the base class from within a derived class:">The ba