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c++ Programming Glossary: mustWhy is processing a sorted array faster than an unsorted array? http://stackoverflow.com/questions/11227809/why-is-processing-a-sorted-array-faster-than-an-unsorted-array guess to minimize the number of times that the train must back up and go down the other path You look at the past history..
What is an undefined reference/unresolved external symbol error and how do I fix it? http://stackoverflow.com/questions/12573816/what-is-an-undefined-reference-unresolved-external-symbol-error-and-how-do-i-fix environment. emphasis mine footnote Implementations must behave as if these separate phases occur although in practice..
What is the difference between a definition and a declaration? http://stackoverflow.com/questions/1410563/what-is-the-difference-between-a-definition-and-a-declaration as the two above extern double f int double However it must be defined exactly once. If you forget to define something that's..
How to pass objects to functions in C++? http://stackoverflow.com/questions/2139224/how-to-pass-objects-to-functions-in-c do in which case you pass by const reference unless you must mutate the object in which case use pass by a non const lvalue..
http://stackoverflow.com/questions/3106110/what-is-move-semantics the copy constructor makes a deep copy because the source must remain untouched. The move constructor on the other hand can..
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom used more attention to detail with regards to exceptions must be given in a more general case however std copy other.mArray..
http://stackoverflow.com/questions/4172722/what-is-the-rule-of-three 1 strcpy name the_name age the_age the destructor must release this resource via delete ~person delete name Even.. memberwise copying does not have the desired effect we must define the copy constructor and the copy assignment operator.. the difference between initialization and assignment we must tear down the old state before assigning to name to prevent..
Undefined Behavior and Sequence Points http://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points Behaviour and Sequence Points Before I get into that you must know the difference s between Undefined Behaviour Unspecified.. Behaviour and Implementation Defined Behaviour . You must also know that the order of evaluation of operands of individual.. it means that between two sequence points a variable must not be modified more than once. In an expression statement the..
http://stackoverflow.com/questions/4421706/operator-overloading used to create function objects also known as functors must be defined as a member function so it always has the implicit.. The array subscription operator is a binary operator which must be implemented as a class member. It is used for container like.. const and a non const version. For the operator value_type must be of class or struct or union type otherwise their implementation..
What are the differences between pointer variable and reference variable in C++? http://stackoverflow.com/questions/57483/what-are-the-differences-between-pointer-variable-and-reference-variable-in-c standard is very careful to avoid dictating how a compiler must implement references but every C compiler implements references.. p x p y p 10 assert x 5 assert y 10 A reference cannot and must be assigned at initialization int x 5 int y 6 int r x A pointer.. My claim in this statement is not that a pointer must point to the stack. A pointer is just a variable that holds..
Where and why do I have to put the “template” and “typename” keywords? http://stackoverflow.com/questions/610245/where-and-why-do-i-have-to-put-the-template-and-typename-keywords type template parameter. But for t x f to be a declaration must be written as typename t x f . If you omit the keyword and the..
In C++, How to get MD5 hash of a file? http://stackoverflow.com/questions/1220046/in-c-how-to-get-md5-hash-of-a-file unsigned long file_size char file_buffer if argc 2 printf Must specify the file n exit 1 printf using file t s n argv 1 file_descript..
Best way to design for localization of strings http://stackoverflow.com/questions/185291/best-way-to-design-for-localization-of-strings MFC application and related utilities. My wishlist is Must preserve string literals in code as opposed to replacing with.. ID's so that the messages are still readable inline Must allow localized string resources duh Must not impose additional.. readable inline Must allow localized string resources duh Must not impose additional run time environment restrictions eg dependency..
What should main() return in C and C++? http://stackoverflow.com/questions/204476/what-should-main-return-in-c-and-c argv Is char envp as a third argument to main portable Must the int main function return a value in all compilers c c return..
What is the difference between new/delete and malloc/free? http://stackoverflow.com/questions/240212/what-is-the-difference-between-new-delete-and-malloc-free from 'Heap' Returns a void Returns NULL on failure Must specify the size required in bytes. Allocating array requires..
What exactly is a reentrant function? http://stackoverflow.com/questions/2799023/what-exactly-is-a-reentrant-function . To be reentrant a computer program or routine Must hold no static or global non constant data. Must not return.. routine Must hold no static or global non constant data. Must not return the address to static or global non constant data... return the address to static or global non constant data. Must work only on the data provided to it by the caller. Must not..
What are uses of the C++ construct “placement new”? http://stackoverflow.com/questions/362953/what-are-uses-of-the-c-construct-placement-new points to in memory. It looks like this #include new Must #include this to use placement new #include Fred.h Declaration..
Detecting USB Insertion / Removal Events in Windows using C++ http://stackoverflow.com/questions/4078909/detecting-usb-insertion-removal-events-in-windows-using-c UnregisterNotification void protected DECLARE_MESSAGE_MAP Must be last. For simplicity I've removed all the cleanup and error..
When and how should I use exception handling? http://stackoverflow.com/questions/4506369/when-and-how-should-i-use-exception-handling quite comprehensive guide on exceptions that I think is a Must Read Exceptions and error handling C FAQ lite As a general rule..
How to get Process Name in C++ http://stackoverflow.com/questions/4570174/how-to-get-process-name-in-c tchar.h #include stdio.h #include psapi.h Important Must include psapi.lib in additional dependencies section In VS2005.....
Undefined Behavior and Sequence Points Reloaded http://stackoverflow.com/questions/4638364/undefined-behavior-and-sequence-points-reloaded from the previous topic. but here type of `i` is Index. Must consider this too in your response if you know it's behavior..
Developing Internet Explorer Extensions? http://stackoverflow.com/questions/5643819/developing-internet-explorer-extensions in Protected Mode which prohibits writes to HKLM HKCU. Must ask IE for Writable registry section pointer which will be.. in Protected Mode which prohibits writes to HKLM HKCU. Must ask IE for Writable registry section pointer which will be..
Better logging library for C++ [closed] http://stackoverflow.com/questions/6692238/better-logging-library-for-c democracy like boost apache etc Crossplatform support. Must support linux windows. Better if it support solaris aix hp ux..
http://stackoverflow.com/questions/1260591/about-mysql-gpl-and-lgpl seen as then any executable dynamically linking against it MUST be then linked against libmysqlclient _r . a so as well. Where..
Writing Python bindings for C++ code that use OpenCV http://stackoverflow.com/questions/12957492/writing-python-bindings-for-c-code-that-use-opencv etc. import_array This is a function from NumPy that MUST be called. Do other stuff The conversions functions above are..
Performance difference between ++iterator and iterator++? http://stackoverflow.com/questions/1303899/performance-difference-between-iterator-and-iterator copying saving etc necessary. So unless you specifically MUST have postincrement because you're using the value before increment..
http://stackoverflow.com/questions/162941/why-use-pointers value to the char array pointer when you declare it you MUST allocate sufficient amount of memory to it before giving it..
Freeing memory allocated in a different DLL http://stackoverflow.com/questions/1634773/freeing-memory-allocated-in-a-different-dll it may have been allocated from another heap. The pointer MUST come from the 'local' heap. _ASSERTE _CrtIsValidHeapPointer..
Symbol not found when using template defined in a library http://stackoverflow.com/questions/18543980/symbol-not-found-when-using-template-defined-in-a-library the function in. BUT in your case there is no address. You MUST have the template definition not just declaration in the same..
C++ difference of keywords 'typename' and 'class' in templates http://stackoverflow.com/questions/2023977/c-difference-of-keywords-typename-and-class-in-templates Type When specifying a template template the class keyword MUST be used as above it is not interchangeable with typename in..
How to make consistent dll binaries across VS versions? http://stackoverflow.com/questions/232926/how-to-make-consistent-dll-binaries-across-vs-versions Sharing class definitions between modules means you MUST have a homogeneous runtime environment as different compilers..
The best cross platform (portable) arbitrary precision math library http://stackoverflow.com/questions/2568446/the-best-cross-platform-portable-arbitrary-precision-math-library me some advices suggestions The primary requirements It MUST handle arbitrarily big integers my primary interest is on integers.. like 100000 the factorial of 100000 . The precision MUST NOT NEED to be specified during library initialization object.. way as it does with 2^66 2^65 on the same platform. It MUST handle addition subtraction multiplication integer division..
thread destructors in C++0x vs boost http://stackoverflow.com/questions/4508181/thread-destructors-in-c0x-vs-boost the pdf Designing MT programs . It explains that the user MUST explicitly call detach on an object of class std thread in C..
system-wide hook for 64-bit operating systems http://stackoverflow.com/questions/5139142/system-wide-hook-for-64-bit-operating-systems
Levenshtein Distance: Inferring the edit operations from the matrix http://stackoverflow.com/questions/5849139/levenshtein-distance-inferring-the-edit-operations-from-the-matrix solution I don't have an idea. Please only write me HOW MUST LOOK for this example. c algorithm levenshtein distance share..
Difference between try-catch syntax for function http://stackoverflow.com/questions/6756931/difference-between-try-catch-syntax-for-function or destructor function try block's handler code MUST finish by emitting some exception. Guideline 1 Constructor function..
C++: When to use References vs. Pointers http://stackoverflow.com/questions/7058339/c-when-to-use-references-vs-pointers perspective to use references where an object MUST be present though it is a shame to lose the syntactic clarity...
Executing cv::warpPerspective for a fake deskewing on a set of cv::Point http://stackoverflow.com/questions/7838487/executing-cvwarpperspective-for-a-fake-deskewing-on-a-set-of-cvpoint order is top left bottom left bottom right top right they MUST be in the same order in the other vector. Second to have the..
boost.python not supporting parallelism? http://stackoverflow.com/questions/8009613/boost-python-not-supporting-parallelism clock endwait It is VERY important to note that you MUST NOT touch any python code or python data or call in to the interpreter..
Check if a class has a member function of a given signature http://stackoverflow.com/questions/87372/check-if-a-class-has-a-member-function-of-a-given-signature Sutter's book he answered to the question that a class C MUST PROVIDE a member function with a particular signature else the..
Why should I prefer to use member initialization list? http://stackoverflow.com/questions/926752/why-should-i-prefer-to-use-member-initialization-list A int x_ x x_ int x class B public B a 3 y 2 'a' and 'y' MUST be initialized in an initializer list it is an error not to..
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