vba programming classes

Reprint please indicate source: http://blog.csdn.net/zhangxingping implementation of the classThe definition of a class is structurally similar to the declaration of a class. The definition of the class begins with the @implementation command word and ends with the @end command word: @implementation Class Name: Super Class name { instance variable declaration } method implementation @endOne point to note is that the corresponding interface file must be introduced

Like we do computer this piece, all know such a thing, the current computer programming language is divided into two major chunks, one for the process, and two for the object-oriented. Java is a purely object-oriented language. Learning about one months of Java, under the Java class and objects have a basic understanding. Next I came to talk about their own views, the big God do not spray, novice small white to the.Now that we are talking about

abstract methods, the derived class must also be declared as an abstract class. In addition, implementing an abstract method is done by the override method.Ⅲ, rules and occasions:　　A. " Interface unchanged ", when the expansion by the interface, you should add a new interface, and cannot change the existing interface;B. As far as possible to design the interface function as a single function block;C. In the interface, all methods are default to public;D. You cannot use the static or virtual key

In the last two articles, we emphasize the operation of the knowledge of the structure. Later, we will gradually complete with C + + as the main body, which means that our tutorials officially into object-oriented programming. The previous tutorial I have repeatedly explained that the structure of the master is very important, where is the important? Important in the structure and class have the same characteristics, but there is a big difference, t

In Ruby, everything is an object. This is very popular for users who like to use highly object-oriented languages (such as Smalltalk, Eiffel or clos. For example, 1, 2, 3, or 10.8 are all objects, rather than the original type in Java or C ++. strings are objects, and classes and methods are also objects. For example, the following are all valid Ruby code (in ruby, the annotation line is defined by the "#" symbol ): # Absolute value of Objec

the class, instead of inheriting the class itself directly, puts the extension code in a "helper class".It is important to note that there is a difference between the lock of the helper class and the lock of the underlying object, and do not use the wrong lock. Otherwise the synchronous method appears to be locked, but in reality it is just an illusion, because using a different lock causes the underlying object to be modified by another thread (not the code path for the lock method of your hel

Classes and class methods are essential features of object-oriented programming languages. This article summarizes the learning notes about classes and methods in Python object-oriented programming. For more information, see Class and instance Python is an object-oriented language, and the most important concept of o

1: Beginners Java, all know that Java is Object-oriented programming. The author begins this section by talking about classes and objects. (Example for reference only, if copy and paste remember to modify the package name and class name, to avoid errors)Learn Java shortcut keys, alt+/code completion function, in fact, this shortcut started the Eclipse Code Auxiliary menu, Shift+ctrl+o shortcut key Import Pa

1Object-Oriented programmingObject-Oriented Programming:Object-Oriented programming -- Object orientedprogrammingOOP takes objects as the basic unit of a program, and an object contains functions for data and manipulating data. process-oriented procedures The design treats the computer program as a series of command sets, that is, the sequence of a set of functions executes. In order to simplify the program design, the process will continue to cut the

Interface , abstract class, and interface-oriented programming interface Essence Interfaces are abstractions of objects and behaviors. An interface is a set of specifications, and if you have this interface, you must implement these specifications. The code says that you inherited an interface, and you have to implement all the methods of that interface. interface function The most important function of an interface is to isolate changes. Of course, t

it places the lock code of the class in other classes that are completely unrelated to it.The fourth method, usingcombination (composition)The way.Public class ImprovedlistThe improvedlist adds an extra layer of locking through its own built-in lock. It does not care whether the underlying list is thread-safe, and even if the list is not thread-safe or changes its yoke, improved provides a consistent locking mechanism for thread safety. Although the

Discussion and comparison of ASP object-oriented programming choose from Rainman_net Blog Discussion and comparison of object-oriented programming for keyword ASP Source ASP is Microsoft in the earlier launch of Dynamic Web programming technology, but its combination of ADO on the database convenient access, combining XML, Com/activex and other technologies to a

Atitit. the extension mechanism of programming language classes and Objects . doc1 . 1. Java Next Generation : an extension without inheritance 11 . 2. Inheritance 11 . 3. using cglib dynamic for Java class Add Method 11 . 4. Tool Class 11 . 5. Wrap wrapper class decorator mode 21 . 6. extension Methods (in fact, the grammar of the tool class sugar) 21 . 7. Scala's implicit conversions 21 . 8. Categor

Object-oriented Programming (object-oriented programming, denoted for OOP) is a very powerful programming method that is designed to create software reuse code, thinking about programming on a class basis. Classes are the core constituent elements of OOP, and typically use

staticvariable svar_2 = new staticvariable (); Svar_2.print ();}} public class Staticset {/** * * static initialization block in Java * Data assignment by initialization block * In the declaration of a class, you can include multiple initialization blocks that, when you create an instance of the class, execute the block of code in turn: Static initialization block (using St atic modifier initialization block) * Static initialization blocks are executed only once when the class is loaded, and st

the license has been used up and blocked, after the operation is finished, release the license through the release method.A semaphore with a number of 1 licenses can act as a mutex and is non-reentrant.(3) FenceFences and lockouts are similar, the main difference being that the fence delays the progress of the thread until all the threads are ready.Cyclicbarrier is the implementation of the fence, where the thread calls the await method to reach the fence and is blocked if the thread is not the

Unlike other programming languages, Swift does not require you to create separate interfaces and implementation files for your custom classes and structs. All you have to do is define a class or struct in a single file, and the system will automatically generate external interfaces for other code.　　Note: Typically an instance of a class is called an object. However, in swift,

Python's class allows you to define many custom methods that make it very easy to generate specific classes. The following are the common custom methods of centralization:How can you print it well? Just define a good __str__() method and return a nice-looking string:__str__()>>> class Student(object):... def __init__(self, name):... self.name = name... def __str__(self):... return ‘Student object (name: %s)‘ % self.name...>>> print(Student(‘Michael‘))

() method, which is the blocking method until all the threads reach the fence position, then the fence is opened and all the threads are freed, and the fence is reset for the next use.Another form of fence is exchanger, which is a two-party (two-party) fence in which the parties exchange data on the fence position. For example, when one thread wants to write data to a buffer, another thread reads the data from the buffer. These threads can use Exchanger to converge and swap the slow buffer with

cannot be called directly by an instance of the class, but only by a proprietary function call (requires the SELF keyword)"; def __my__(self):#proprietary functions (with double underscores for function names)Self.__test(); defdev__ (self,a,b):"""Demonstrating exceptions""" Try: returnA/C; exceptexception,e:PrintE.message; def __passtest__(self):"""when the function logic is not well planned, the PASS keyword is used for processing""" Pass;#instantiation of Subclassesb=