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c++ Programming Glossary: doingIs there a difference in C++ between copy initialization and direct initialization? http://stackoverflow.com/questions/1051379/is-there-a-difference-in-c-between-copy-initialization-and-direct-initializati A_factory_func returns. I assume it returns an A then it's doing the same except that when the copy constructor is explicit then.. fail. Read 8.5 14 . double b1 0.5 double b2 0.5 This is doing the same because it's a built in type this means not a class.. type here . Read 8.5 14 . A c1 A c2 A A c3 A This is not doing the same. The first default initializes if A is a non POD and..
Case insensitive string comparison in C++ http://stackoverflow.com/questions/11635/case-insensitive-string-comparison-in-c string comparison in C What is the best way of doing case insensitive string comparison in C with out transforming..
throwing exceptions out of a destructor http://stackoverflow.com/questions/130117/throwing-exceptions-out-of-a-destructor people say never throw an exception out of a destructor doing so results in undefined behavior. Stroustrup makes the point..
Most vexing parse: why doesn't A a(()); work? http://stackoverflow.com/questions/1424510/most-vexing-parse-why-doesnt-a-a-work object A a B declares an object However in the second case doing the same leads to a compile error A a compile error My question..
Do-While and if-else statements in C/C++ macros http://stackoverflow.com/questions/154136/do-while-and-if-else-statements-in-c-c-macros FOO X if 1 f X g X else I can't see what the do while is doing. Why not just write this without it #define FOO X f X g X c..
Unnamed/anonymous namespaces vs. static functions http://stackoverflow.com/questions/154469/unnamed-anonymous-namespaces-vs-static-functions using static functions Or are they essentially two ways of doing the exact same thing c namespaces share improve this question.. namespace are back to being essentially two ways of doing the exact same thing. For more discussion please see this SO..
Most effective way for float and double comparison http://stackoverflow.com/questions/17333/most-effective-way-for-float-and-double-comparison way to compare two double or two float values Simply doing this is not correct bool CompareDoubles1 double A double B return..
In what cases do I use malloc vs new? http://stackoverflow.com/questions/184537/in-what-cases-do-i-use-malloc-vs-new the array delete pBuffer The new keyword is the C way of doing it and it will ensure that your type will have their constructor..
What are the rules about using an underscore in a C++ identifier? http://stackoverflow.com/questions/228783/what-are-the-rules-about-using-an-underscore-in-a-c-identifier anywhere which is easy as I rarely use underscore. After doing research on this article I no longer end my identifiers with..
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom before for a strong exception guarantee the compiler is doing for us now how kind. At this point we are home free because..
How can I add reflection to a C++ application? http://stackoverflow.com/questions/41453/how-can-i-add-reflection-to-a-c-application a class id then i'm afraid there is no Standard C way of doing this. You have to use either A Meta Compiler like the Qt Meta..
When to use virtual destructors? http://stackoverflow.com/questions/461203/when-to-use-virtual-destructors make the base class destuctor protected and nonvirtual by doing so the compiler won't let you call delete on a base class pointer...
Do the parentheses after the type name make a difference with new? http://stackoverflow.com/questions/620137/do-the-parentheses-after-the-type-name-make-a-difference-with-new uniform initialization syntax . Before this up until C 03 doing B obj default initalized B obj declares a function named obj..
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 to call attention to the fact that you are probably doing something dangerous that could be breaking the rules. For further..
OpenCV 2.3 C++ Visual Studio 2010 http://stackoverflow.com/questions/7011238/opencv-2-3-c-visual-studio-2010 win superpack.exe without using CMake software. What am I doing wrong c c visual studio 2010 visual studio opencv share improve..
“unpacking” a tuple to call a matching function pointer http://stackoverflow.com/questions/7858817/unpacking-a-tuple-to-call-a-matching-function-pointer all of the types one by one but I can't see a way of doing that for dispatching a function call. The real motivation for..
Singleton: How should it be used http://stackoverflow.com/questions/86582/singleton-how-should-it-be-used to show off how much you know Because everyone else is doing it See cargo cult programmer in wikipedia In user interface..
how to merge two BST's efficiently? http://stackoverflow.com/questions/1008513/how-to-merge-two-bsts-efficiently is O N It's just in order iteration on the whole tree. Doing it for both is O n1 n2 Merging two sorted lists is into one..
Clean up your #include statements? http://stackoverflow.com/questions/1014632/clean-up-your-include-statements must include should be the correspondingly named foo .h. Doing this ensures that foo .h includes whatever it needs to compile...
Calculating convexityDefects using OpenCV 2.4 in c++ http://stackoverflow.com/questions/10620981/calculating-convexitydefects-using-opencv-2-4-in-c defects convexityDefects cv Mat contours hull defects Doing this I get this error OpenCV Error Assertion failed ptnum 3..
http://stackoverflow.com/questions/10639053/name-lookups-in-c-templates template class T class List public void next T cout Doing some stuff endl template class T class Special_List public..
How can I check if a type is an instantiation of a given class template? [duplicate] http://stackoverflow.com/questions/11251376/how-can-i-check-if-a-type-is-an-instantiation-of-a-given-class-template duplicate This question already has an answer here Doing a static_assert that a template type is another template ..
Confused when boost::asio::io_service run method blocks/unblocks http://stackoverflow.com/questions/15568100/confused-when-boostasioio-service-run-method-blocks-unblocks point in time then async_receive returns immediately. Doing the actual work. In this case this is reading data from the..
Your preferred C/C++ header policy for big projects? http://stackoverflow.com/questions/181921/your-preferred-c-c-header-policy-for-big-projects style include header share improve this question Doing .h includes only in C files means that if I just include a header..
Is it good practice to NULL a pointer after deleting it? http://stackoverflow.com/questions/1931126/is-it-good-practice-to-null-a-pointer-after-deleting-it is that if you leave pointers around in user code you're Doing It Wrong. The pointer shouldn't be there to point to garbage..
C++: Life span of temporary arguments? http://stackoverflow.com/questions/2506793/c-life-span-of-temporary-arguments of temporaries by binding them to a const reference. Doing so extends their lifetime to the reference's lifetime MyClass..
Dynamically allocating an array of objects http://stackoverflow.com/questions/255612/dynamically-allocating-an-array-of-objects to swap the states states of the two objects. Note Doing any operation on src after a move is risky apart from destroy..
C++ template function compiles in header but not implementation http://stackoverflow.com/questions/3040480/c-template-function-compiles-in-header-but-not-implementation string sep ... to the file where the template is defined. Doing this you no longer have to #include the hpp file from within..
What's the difference between function(myVar) and (function)myVar? http://stackoverflow.com/questions/3484371/whats-the-difference-between-functionmyvar-and-functionmyvar be used . stringstream is not a function though. Doing function x will call it the function but doing function x is..
How do I start a CUDA app in Visual Studio 2010? http://stackoverflow.com/questions/3778799/how-do-i-start-a-cuda-app-in-visual-studio-2010 I need to have VS 2008 msvc 9.0 also installed my word. Doing so now. But I'm guessing that at least part of my problems stem..
How do I pass a reference to a two-dimensional array to a function? http://stackoverflow.com/questions/404232/how-do-i-pass-a-reference-to-a-two-dimensional-array-to-a-function void do_something int array board_width board_height Doing it with void do_something int array board_width board_height..
Boost::Tuples vs Structs for return values http://stackoverflow.com/questions/409827/boosttuples-vs-structs-for-return-values on the other side clearly win for their versatile nature. Doing that with div_result you need to overload operator or need to..
Does std::list::remove method call destructor of each removed element? http://stackoverflow.com/questions/4260464/does-stdlistremove-method-call-destructor-of-each-removed-element pointee destroying a pointer variable is always a no op. Doing nothing is definitely better than causing undefined behavior..
C++ calling delete on variable allocated on the stack http://stackoverflow.com/questions/441831/c-calling-delete-on-variable-allocated-on-the-stack any of these e.g. no free ing or delete ing a new object . Doing so results in undefined behavior. share improve this answer..
Why is this cin reading jammed? http://stackoverflow.com/questions/478258/why-is-this-cin-reading-jammed cin.ignore std numeric_limits std streamsize max ' n' Doing that will make the stream empty and a following read will wait..
Does anyone use template metaprogramming in real life? [closed] http://stackoverflow.com/questions/63494/does-anyone-use-template-metaprogramming-in-real-life off all the expression analysis to the template processor. Doing this kind of thing with templates is more efficient than say..
http://stackoverflow.com/questions/836469/cross-platform-programming my mac before... . Stay close to your home directory ~ . Doing your project on the target system will help you get certain..
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