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c++ Programming Glossary: worksWhy is “using namespace std;” considered bad practice? http://stackoverflow.com/questions/1452721/why-is-using-namespace-std-considered-bad-practice and Bar using namespace foo using namespace bar Everything works fine you can call Blah from Foo and Quux from Bar without problems...
Regular cast vs. static_cast vs. dynamic_cast http://stackoverflow.com/questions/28002/regular-cast-vs-static-cast-vs-dynamic-cast of sequences of C casts and taking the first c cast that works without ever considering dynamic_cast . Needless to say that..
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom exception guarantee . How does it work Conceptually it works by using the copy constructor's functionality to create a local..
When should static_cast, dynamic_cast and reinterpret_cast be used? http://stackoverflow.com/questions/332030/when-should-static-cast-dynamic-cast-and-reinterpret-cast-be-used as to call a member function overload. const_cast also works similarly on volatile though that's less common. dynamic_cast..
What can I use to profile C++ code in Linux? http://stackoverflow.com/questions/375913/what-can-i-use-to-profile-c-code-in-linux in the presence of recursion. They will also say it only works on toy programs when actually it works on any program and it.. also say it only works on toy programs when actually it works on any program and it seems to work better on bigger programs.. It might not be obvious but the stack sampling technique works equally well in the presence of recursion. The reason is that..
RAII and smart pointers in C++ http://stackoverflow.com/questions/395123/raii-and-smart-pointers-in-c foo std string str Do cool things to or using str This works fine but what if we want to return str We could write this std..
http://stackoverflow.com/questions/402283/stdwstring-vs-stdstring using Unicode without even knowing it. And as std string works with char so std string is already unicode ready. Note that.. So their solution was an interesting one If an application works with char then the char strings are encoded printed shown on.. GTK or QT ... . The fact is that behind the scenes Windows works with wchar_t strings so even historical applications will have..
http://stackoverflow.com/questions/484635/are-global-variables-bad write these variables. To understand how the application works you pretty much have to take into account every function which..
Pretty-print C++ STL containers http://stackoverflow.com/questions/4850473/pretty-print-c-stl-containers type_traits #include vector #include algorithm This works similar to ostream_iterator but doesn't print a delimiter after.. built my version around a pretty_ostream_iterator which works similar to the std ostream_iterator but doesn't print a delimiter.. used std enable_if which is available as part of C 0x and works in Visual C 2010 and g 4.3 needs the std c 0x flag and later...
What are the barriers to understanding pointers and what can be done to overcome them? http://stackoverflow.com/questions/5727/what-are-the-barriers-to-understanding-pointers-and-what-can-be-done-to-overcome
WChars, Encodings, Standards and Portability http://stackoverflow.com/questions/6300804/wchars-encodings-standards-and-portability drop together with GetCommandLineW CommandLineToArgvW works perhaps there should be a separate wrapper for Windows . File..
Can a local variable's memory be accessed outside its scope? http://stackoverflow.com/questions/6441218/can-a-local-variables-memory-be-accessed-outside-its-scope work And many more topics in how the C# memory manager works. Many of these articles are also germane to C programmers http..
What is a smart pointer and when should I use one? http://stackoverflow.com/questions/106508/what-is-a-smart-pointer-and-when-should-i-use-one transfer ownership. p1 gets set to empty p2 DoSomething Works. p1 DoSomething Oh oh. Hopefully raises some NULL pointer exception...
Why do people say there is modulo bias when using a random number generator? http://stackoverflow.com/questions/10984974/why-do-people-say-there-is-modulo-bias-when-using-a-random-number-generator range int x do x rand while x n Hope that helps everyone Works cited and further reading CPlusPlus Reference Eternally Confuzzled..
std::endl is of unknown type when overloading operator<< http://stackoverflow.com/questions/1134388/stdendl-is-of-unknown-type-when-overloading-operator operator const T UIStream my_stream my_stream 10 heads Works but my_stream endl Gives compilation error error C2678 binary..
How can I get the size of a memory block allocated using malloc()? [duplicate] http://stackoverflow.com/questions/1208644/how-can-i-get-the-size-of-a-memory-block-allocated-using-malloc to the library exits I run over the buffer boundaries. Works like a charm. It just isn't elegant and in no way usable in..
How to make generic computations over heterogeneous argument packs of a variadic template function? http://stackoverflow.com/questions/14261183/how-to-make-generic-computations-over-heterogeneous-argument-packs-of-a-variadic
C++ Static member initalization (template fun inside) http://stackoverflow.com/questions/1819131/c-static-member-initalization-template-fun-inside getHelper 2 With g 4.4.1 1 and 2 commented A Hello I'm A. Works as intended 1 uncommented A Hello I'm A. B I would expect that.. mB 1 and 2 uncommented A Hello I'm A. B Hello I'm B. Works as intended 1 commented 2 uncommented Segfault in the static..
How to Calculate Execution Time of a Code Snippet in C++ http://stackoverflow.com/questions/1861294/how-to-calculate-execution-time-of-a-code-snippet-in-c the amount of milliseconds elapsed since the UNIX epoch. Works on both windows and linux. int64 GetTimeMs64 #ifdef WIN32 Windows..
Is there a standard sign function (signum, sgn) in C/C++? http://stackoverflow.com/questions/1903954/is-there-a-standard-sign-function-signum-sgn-in-c-c a float or T rather than an int which seems wasteful. Works for ints floats doubles unsigned shorts or any custom types..
Why don't C++ compilers define operator== and operator!=? http://stackoverflow.com/questions/217911/why-dont-c-compilers-define-operator-and-operator For example class foo public std string str_ int n_ foo f1 Works foo f2 f1 Works foo f3 f3 f2 Works if f3 f2 Fails if f3 f2 Fails.. foo public std string str_ int n_ foo f1 Works foo f2 f1 Works foo f3 f3 f2 Works if f3 f2 Fails if f3 f2 Fails Is there a.. str_ int n_ foo f1 Works foo f2 f1 Works foo f3 f3 f2 Works if f3 f2 Fails if f3 f2 Fails Is there a good reason for this..
C++ Timer function to provide time in nano seconds http://stackoverflow.com/questions/275004/c-timer-function-to-provide-time-in-nano-seconds int main timespec ts clock_gettime CLOCK_MONOTONIC ts Works on FreeBSD clock_gettime CLOCK_REALTIME ts Works on Linux For.. ts Works on FreeBSD clock_gettime CLOCK_REALTIME ts Works on Linux For windows you want to use the QueryPerformanceCounter..
Why don't the std::fstream classes take a std::string? http://stackoverflow.com/questions/32332/why-dont-the-stdfstream-classes-take-a-stdstring filename testfile std ifstream fin fin.open filename.c_str Works just fine. fin.close fin.open filename Error no such method...
Undefined Behavior and Sequence Points Reloaded http://stackoverflow.com/questions/4638364/undefined-behavior-and-sequence-points-reloaded question It looks like the code i.operator i.operator Works perfectly fine with regards to sequence points. Section 1.9.17..
Isn't the template argument (the signature) of std::function part of its type? http://stackoverflow.com/questions/5931214/isnt-the-template-argument-the-signature-of-stdfunction-part-of-its-type Call is ambiguous. a y Call is ambiguous. a function int x Works. a function int int y Works. return 0 Interestingly if I comment.. is ambiguous. a function int x Works. a function int int y Works. return 0 Interestingly if I comment out the a function with..
Detailed explanation on how Koenig lookup works with namespaces and why its a good thing? http://stackoverflow.com/questions/8111677/detailed-explanation-on-how-koenig-lookup-works-with-namespaces-and-why-its-a-go MyClass obj global object int main doSomething obj Works Fine MyNamespace doSomething is called. In the above example..
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