effective c#

-compiled, and in fact only one of them needs to be compiled, modified: String Test2 (bool isTrue) { newifreturnelsereturn Method2 ();}} Now that the method is split, the two methods can be JIT-compiled as needed without having to compile all the first time.2. You can have more than dozens of statements in the If-else branch, or a branch dedicated to handling errors that occur in the program, or a selective extraction of the code in each case in the switch statement.3.

-compiled, the assembly is loaded as a whole. Security checks become an additional overhead when you span assemblies. The smaller the number of times a program spans an assembly, the more efficiently it executes. The loss of performance is negligible for us because, at development time, we focus on the flexibility of the code, so there is no need to worry about splitting the large assemblies into small assemblies for performance issues. Common assemblies: small, focused assemblies th

fails, and throws a Bad_cast exception if the downcast of the reference type fails2) to use dynamic_cast, the class type that must be converted must have at least one virtual function, otherwise it will be wrong at compile times because most compilers are pointing to the dynamic_cast implementation by pointers stored by the first node of the virtual function table that the virtual function pointer points to. The Type_info type of object is implemented, so if there is no virtual function, there

when a default copy assignment operator is generated, the compiler is unsure how to handle them. Finally, if the copy assignment operator is declared as private in the base class, the compiler refuses to generate a copy assignment operator in the derived class. After all, the copy assignment operators generated by the compiler for derived classes need to be able to handle the parts of the base class, in which case they are certainly not able to trigger a function that the derived class does not

1. View C + + as a federation of Languages. Consider C + + as a 4 seed language, C, object-oriented C + +, Template C + +, the STL.2, things to Remember:rules for effective C + + progra

initialized before it was usedAlways initialize an object before it is Used. For built-in types without any members, you must do this manually.For anything other than the built-in type, the initialization responsibility falls on the constructor, ensuring that each constructor initializes each member of the Object.please remember: Manual initialization of built-in objects, because C + + does not guarantee initialization of them; Construct

clause 27: as little as possible to do transformational action One of the design goals of C + + is to ensure that "type errors" are never possible, the direct collision with this goal is the transformation of operations, whether it is in C + + in the transformation of part of the transition operation or C + + specific 4 types of conversion operations, these 4 ty

is overloaded with the type name? After overloading the double type, it obtains new meanings in addition to the original meaning (converting a complex class object to a double type data, and specify the conversion method)? Thus, the compilation system can not only recognize the original double type data, but also the complex class object as a double data processing?TypeSwitch.cpp: Defines the entry point of the console application. // #include "stdafx.h" #include } operator double ()

Landlord recently in finishing two books reading notes "effective C + +" and "TCP/IP Detailed Volume 1: agreement", these two are classic books, notes also have some. Because the main is to talk about "effective C + +", so the book has been written out of the directory listed, This directory will not be updated .

Clause 17: overloaded operators should comply with C/C ++ for more terms, please go to the original Article Source: http://blog.csdn.net/liuchang5 Suppose we use a third-party stack template class, and its pop function is like this: template Unfortunately, this function is not from the master's hand. Is it abnormal? The condition is that the assignment operator of the T type should abide by the

1 Make yourself accustomed to C + + clause 01: View C + + as a language federationView C + + as a federation oflanguages –c. In the final analysis C + + is still based on C. Chunks (blocks), statements (statements), preproces

on : Depending on C + + for a language federal1: Today's C + + is already a multi-paradigm programming language (MULTIPARADIGM programming language), one that supports both the process form (procedural), the object-oriented form (object-oriented), The language of the function form (functional), the generic form (generic), and the meta-programming form (metaprogramming). Therefore,

C#2.0, which was available in 2005, has some of the major new features. This allows some of the best practical experiences that are currently in use to change, and will be modified as the next generation of tools is released. Although you may not use these features at the moment, you should be prepared to do so. When Visual Studio. net2005 is released, it gets a new development environment and upgrades the

All say C + + is difficult to learn. Indeed, this is because C + + is too large, Meyers a large number of C + + into four parts: 1.c language; 2. The classic object-oriented C + +: including class, encapsulation, inheritance, polymorphism, virtual functions and other class

There are two types of conversions available in the C language:1 implicit type conversion: implicit type conversion;2 Display Type conversion: use (type) expression or type (expression) (PS: This representation is mainly used to pass the parameter is the class type and the constructor of the class is explicit), which consists of a stack of parentheses plus an object name, which is difficult to identify.In C

Clause 52: Write the placement new also write palcement delete question: widget* pw=new Widget; The execution of this statement causes two functions to be used: one is the operator new for allocating memory, and the other is the widget's default constructor. Assuming that the first function call succeeds, the second function throws an exception. In this way, the memory allocation of operator New in the first step must be canceled and restored restored, otherwise it will cause a memory leak, a

clause 21: When an object must be returned, do not attempt to return to its reference On the blog we talked about the pass-by-value efficiency is particularly low, in addition to certain circumstances, as far as possible in the transfer of parameters to use Pass-by-reference-to-const, so, some small partners to go to an extreme, Firm pursuit of Pass-by-reference purity, so that the return value also want to set as a reference, but the goose extremes, not too desperate to pursue extreme. Let's t

reprint: http://www.cnblogs.com/jerry19880126/p/3616999.html 工欲善其事, its prerequisite, let's start with the Visual Studio Tools, step-by-step like the following: First select the c/c++-> command line on the left, and then write the/d1 reportallclasslayout on the other options, which can see the memory layout of all the related classes, if you write the/D1 Reportsingleclasslayoutxxx (XXX is the class nam

Exception I have said before that I want to summarize the exception section. This section is a summary article. If possible, I would like to describe the main content of each small chapter in a concise manner, so that it is easy for you to remember and read, you can focus on the chapters you are interested in. After all, not everyone is fond of holding the chapter and chapter. Learning to pick what you need is also an art. I personally think: 9, 10, 11 is very important, it is a technology that

In C + +, the Const object can only invoke the const member function, for what reason. Let's look at the following examples and analyze them to understand why: #include Compile an error: We can see that the compiler complains that the Const Myint cannot be converted to Myint, and that there are some conversion problems when the Const object calls the non-const member function, so let's take a look at the following analysis: The const object canno