. NET, special type members in
----Microsoft. NET Platform series of articles three
Translation/Zhao Ning
In the previous two articles, we studied the basics of types. In this article we will examine certain special members of type definition. These types contribute to object-oriented design in a way that greatly simplifies the syntax required to handle types and their object instances.
Type Builder
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Static data members
• Use the keyword static declaration
• When declaring a class's data member as static, no matter how many classes of objects are created, the static member has only one copy
• Shared in all objects of a class with static lifetime
• If no other initialization statement exists, all static data members are initialized to zero when the first object is created
• Define and initialize outside
ActiveDirectoryAllows administrators to create group accounts, allowing administrators to manage system security more effectively. The system controls the access to objects in Active Directory based on the user's group membership identity. The following describes how to create and add a group in the Active Directory of ActiveDirectory.Group members.
In ActiveDirectory, users with the same attributes can be put into the same group, which greatly improv
Before proceeding to this Chapter, if we want to share a certain data within a certain range, we will set up a global object, but the object-oriented program is composed of objects, how can we share data within the scope of the class?This is the focus of this chapter:Declared static class members or member functions can be shared within the scope of the class.We name such a memberStatic member and static member functions.Below we use several instances
= new Person (); the right side of the equal sign is a real object instance, the entity in the heap memory,
There are three new persons () in total, so three spaces will be opened in the heap to generate three instance objects, each of which
They are independent from each other and use their own space. in PHP, if there is a new keyword
Instantiate an object and open up a space in the heap.
Each instance object in the heap is stored as a property. for example, the instance object in the heap con
compile time, and note that the method of distinguishing classes is used Self::m
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Copy Code5. Static members of the class and accessStatic can be used to modify the properties and methods of a class, a member of the static adornment belongs to a class rather than an instance of a class, and a statically member must be accessed by using the class name plus double colons::, because the stati
Public members: Members defined by modifying the prototype attribute of the constructor can be accessed by all instances of the constructor;
Private Members: Construct the Members defined by books (VaR for attributes and function for functions), which can only be accessed within the constructor;
Static
The mutable keyword is a strange modifier (specifier) that can only be used for non-static data members of a class. Next I will discuss the semantics and usage of mutable, but first I will explain a key concept of the C ++ object model. Object status
The state of an object consists of the values of its non-static data members. There
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ranking very after, or directly ruined your own, your site to shield off, these you understand. Therefore, stationmaster Bar www.wzhan.net thinks to do SEO optimization, must have a good relationship with Baidu eldest brother.
So, how do you make a good relationship? Baidu eldest brother but deep pockets, often do not appear, not everyone can be close to the exchange with him. After all, he is the eldest of the family, can say that the head of the family, control the fate of the entire clan, g
Problem Description:In a production environment, you can relieve stress by adding new secondary replica members when the read pressure of a secondary replica member is large.In order to achieve the primary replica member non-stop, and reduce the pressure of the primary replica members, you can mongodump backup data on the secondary replica members;In order to ena
the object, so that the operation between the different instance objects does not affect each other) (the output object var_dump the Output object)//The operation of the object is the principal operation "is also the main object-oriented programming" because of the need for object-based operations, So you need access to Object members: Access key (different ways of visibility and access) "Access to members
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Define class members using prototype objectsThe previous section describes the implementation mechanism of the class and the implementation of the constructor. Now we introduce another machine that adds members to the class.Format: Prototype object. When a new function is created, the members of this object are automatically assigned to the created object. For ex
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A derived class cannot directly access private members of a base class. to access a base class, you must use the base class interface, that is, its member functions. There are two implementation methods:
1. Add protection members to the declaration of the base class, and define private members provided to the base class for access by the derived class as protecti
Data Member: Data members can be dividedStatic Member,Instance MemberStatic Member: Static member variables are associated with the class and can be used as "common" variables in the class. They are not dependent on the existence of characteristic objects.Class Name adding operators and variable names for accessInstance Member: Instance member variables are associated with objects, and access to instance members
Del. icio. us tags: C ++, protected, access
In a class, the third-layer access permission is: Only public members can be accessed from outside, its subclass can access protected and public members, and its own can access private, protected and public. However, the following example is a strange counterexample.
1: class A 2: { 3: public: 4: A() : x(0) {} 5: int foo(A a) 6: { 7: re
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