immutable c#

resolved. Most Windows API functions have LPTSTR or LPCTSTR values. They are both modifiable and non-modifiable buffers that contain a null-terminated array of characters. "C" stands for const, meaning that data is not passed outside the function. "T" means that the parameter can be Unicode and ANSI, depending on the character set you choose and the character set of the underlying operating system in the CLR run: So when the function is declared, add

use the depth of the copy it? Then I will share some of what I have summed up to you, hoping to help you better understand the depth of the copy!So let's take a look at the conversion of the array type below1. Immutable objects → conversion of mutable objects:Nsarray *array1= [Nsarray arraywithobjects:@ "a", @ "B", @ "C", @ "D", nil];Nsmutablearray *str2=[array1 Mutablecopy];2. Variable objects → conversio

Const in C/C ++, constin 1. the const object must be initialized because the value cannot be changed once created. Eg: Const int I = GetSize (); // correct: runtime Initialization Const int j = 42; // correct: initialization at compilation J = 33; // error: try to write a value to the const object Const int k; // error: k is an uninitialized constant. 2. By default, the const object is only valid in the fi

C language to C ++ (1), C language When talking about the differences between C ++ and C, most people will think of object-oriented and process-oriented. However, this statement is not accurate. Object-oriented and process-oriented are two different programming ideas.

In contrast to C-language functions, C + + adds four new mechanisms for overloading (overloaded), inline (inline), const, and virtual. The overloaded and inline mechanisms are available for both global functions and member functions of classes, and the const and virtual mechanisms are used only for member functions of the class. Overloading and inline are definitely good for the

starting with this section, enter the introduction to the C + + language. There may be people wondering why the C + + language Basic Tutorial 16th lesson: C + + and the difference with C? Here's a little explanation, C + + is often referred to as "

Don't think this question is sensational, but in the current situation, c/c ++ needs to exit the stage or be changed. I think in the next one or two years, c/c ++ (whether it is mfc or bcb), one of the criteria for programmer level evaluation, will give way to three programming languages.

1.3 C + + world mapThe development process of C + + language is not only a process of increasing features and enriching content, but also a continuous gongchenglvede process in the field of application. In its more than 30-year development process, C + + has been widely applied and developed in many fields of application. Whether on the initial unix/linux operati

First, the introduction C + + programmers react differently when Microsoft introduced Vs.net7 to implement extensible managed C + +. Although most programmers are relieved to be able to continue using C + +, almost everyone suffers from the arcane syntax provided by managed C + +. Microsoft clearly sensed from feedbac

main frameworks (Foundation, Appkit, and Core Data ); 3. AppKit framework Class required for building GUI applications 4. Core Foundation A low-level C language framework. An object has a memory management system for reference counting. objects with the same memory layout can be freely converted. 5. Core Graphics A low-level API for Quartz 2D graphics. 6. Core Animation Animation Frame 7. WebKit 8. ImageIO 9. Core Image 10. Core Audio 11. OpenGL 12.

From: http://blog.csdn.net/Eric_Jo/archive/2009/05/14/4184916.aspx To understand what C ++/CLI is, first know what CLI is. 1. Introduction to CLI CLI :( common language infrastructure, universal language framework) provides a set of executableCodeAnd the specifications of the virtual execution environment required for running. More commonly, we can say that it is a virtual platform, operating system and application.ProgramA layer of abstraction

final \ 0 'A' is of the char type, and "a" is of the string type. @ "\\\\" @ Indicates that \ In the string is not considered as an escape character. 3. string processing · In C #, a single character is enclosed in single quotes as char type ('A'). It can only be placed in single quotes and can only contain one character. · A single character can also be expressed as a string or a string of 0 characters. · Use the s. Length attribute to obtain th

), this question discusses the difference between "constant" and "read-only variable". Constants are definitely read-only, such as 5, "ABC", etc., is definitely read-only, because there is no place in the program to store its value, of course, it is not able to modify it. A "read-only variable" is a place in memory to store its value, except that the value is not allowed to be modified by the compiler. The C keyword const is a modifier (Qualifier) tha

C + + This is not what I wrote, I just see feel good, just paste the oh. ： Do not think that this topic is sensational, but in the current situation, C + + is required to exit the stage or to say that it is necessary to upgrade. I think that in the next year or two, as one of the criteria for programmer rating, C + + (whether MFC or BCB) will give way to three p

); Statticmember sMember2 = new Statticmember (); Console.WriteLine (Statticmember.testa); Console.ReadLine (); } } Results: Static member Features:A, must be referenced by the class name, can not be referenced by the object of the class;b, no matter how many times the class is instantiated, only the same area in memory;C, static methods if you reference variables or methods outside the method, they must also

Java passes the data to the C example:public class JNI {static{System.loadlibrary ("PassData");}Pass two variables of type int to C let C add a second to returnpublic native int Add (int x, int y);Pass arguments of type string to C and return toPublic native string Sayhelloinc (string s);Passing an array of type int to

either. The system only connects to one Printer. Copying Printer cannot add a Printer out of thin air. In general, the "object" in the object-oriented sense is non-copyable. The class objects in Java are both object semantics and reference semantics. ArrayList The value semantics is irrelevant to immutable. Java has a value object. According to the definition of (PoEAA 486), it is actually an immutable ob

Keyword const is the modifier (Qualifier) that is used to qualify a variable that is not allowed to be changed. The variable n in the above code is decorated as a read-only variable, but the modification is not a constant. While ANSI C stipulates that the dimension must be "constant" when the array is defined, "read-only variables" are not allowed.2), note: In ANSI C, this is wrong, because the size of the

1. Is the C Runtime Library the same thing as the C function library (such as stdio. h and stdlib. h?2. In the technical reference books, I often say "Microsoft C Runtime Library". Is the C Runtime Library a language database or an operating system database? Do other operating systems, such as Unix/Linux, have

C ++FunctionAdvanced features Compared with C functions, C ++ adds four new mechanisms: overloaded, inline, const, and virtual. The overload and inline mechanisms can be used for both global functions and class member functions. The const and virtual mechanisms are only used for class member functions. Heavy Load and inline will certainly have their advantages to