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c++ Programming Glossary: ableWhy 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 achieve 90 hit rates. But when faced with unpredictable branches with no recognizable patterns branch predictors are.. But when faced with unpredictable branches with no recognizable patterns branch predictors are virtually useless. Further Reading.. hard to predict So what can be done If the compiler isn't able to optimize the branch into a conditional move you can try some..
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom void swap dumb_array first dumb_array second nothrow enable ADL not necessary in our case but good practice using std swap.. of Four and a half . Why Because not only do we need to be able to copy construct our resource we need to move construct it.. of the class leaving it in a state guaranteed to be assignable and destructible. So what we've done is simple initialize via..
http://stackoverflow.com/questions/402283/stdwstring-vs-stdstring wstring VS std string I am not able to understand the differences between std string and std wstring.. including special characters Notice A std string is suitable for holding a 'binary' buffer where a std wstring is not On.. not On Linux Yes. On Windows Only special characters available for the current locale of the Windows user. Edit After a comment..
http://stackoverflow.com/questions/4421706/operator-overloading However it is very unlikely that you would find a reasonable use case for these 2 . 1 As with all rules of thumb sometimes.. of postfix increment for built in types they might not be able to do the same for user defined types which could be something.. and for output and input there are very few reasonable use cases for overloading these. 3 Again the lesson to be taken..
Why do I get “unresolved external symbol” errors when using templates? http://stackoverflow.com/questions/456713/why-do-i-get-unresolved-external-symbol-errors-when-using-templates the compiler needs the full code for that function to be able to build the correct function with the appropriate type. However.. is detailed in the template's source file and hence unavailable. As a result of all this the compiler just assumes that it's.. in the unresolved external symbol. The solutions available for this are to include the full definition of the member function..
Pretty-print C++ STL containers http://stackoverflow.com/questions/4850473/pretty-print-c-stl-containers to solve the problem in a completely general and nestable fashion. The delimiters may be individually specialised an example.. to print raw C arrays. Update Pairs and tuples are available for printing default delimiters are round brackets. The enable.. for printing default delimiters are round brackets. The enable if type trait requires C 0x but with some modifications it should..
Why can templates only be implemented in the header file? http://stackoverflow.com/questions/495021/why-can-templates-only-be-implemented-in-the-header-file C standard library a tutorial and handbook The only portable way of using templates at the moment is to implement them in.. be accessible and therefore the compiler wouldn't be able to instantiate the template. A common solution to this is to.. class Foo int template class Foo float You will only be able to use Foo with int or float If my explanation isn't clear enough..
http://stackoverflow.com/questions/589575/size-of-int-long-etc double 8 bytes I tried to find without much success reliable information stating the sizes of char short int long double.. in bytes but it specifies minimum ranges they must be able to hold. You can infer minimum size in bits from the required..
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 quite right in choking on it. I also know that I should be able to add template somewhere to tell the compiler that inUnion.. function Background I implemented a discriminated union capable of holding C types even if they have destructors etc. I implemented.. and semantically it will declare f as a pointer variable . However if it's a non type it will be parsed as an expression...
WChars, Encodings, Standards and Portability http://stackoverflow.com/questions/6300804/wchars-encodings-standards-and-portability Portability and serialization are orthogonal concepts. Portable things are things like C unsigned int wchar_t . Serializable.. things are things like C unsigned int wchar_t . Serializable things are things like uint32_t or UTF 8. Portable means that.. Serializable things are things like uint32_t or UTF 8. Portable means that you can recompile the same source and get a working..
OpenCV 2.3 C++ Visual Studio 2010 http://stackoverflow.com/questions/7011238/opencv-2-3-c-visual-studio-2010 Build 1 succeeded 0 failed 0 up to date 0 skipped To be able to execute the application you'll need to modify the PATH environment.. application you'll need to modify the PATH environment variable of your system to add the location of OpenCV's DLLs. Add this..
How to generate a stacktrace when my gcc C++ app crashes http://stackoverflow.com/questions/77005/how-to-generate-a-stacktrace-when-my-gcc-c-app-crashes are compiled using gcc . I would like my program to be able to generate a stack trace when it crashes and the next time..
Where do I find the current C or C++ standard documents? http://stackoverflow.com/questions/81656/where-do-i-find-the-current-c-or-c-standard-documents ansi.org C99 &ndash ISO 9899 1999 30 from ansi.org available online free of charge C90 &ndash AS 3955 1991 141 from ansi.org.. the C90 standard for much less money than above you may be able to find a cheap used copy of Herb Schildt 's book The Annotated.. the draft versions of these standards are freely downloadable refer to those answers or Google for download locations . However..
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