c++ Programming Glossary: orWhat can I use to profile C++ code in Linux? http://stackoverflow.com/questions/375913/what-can-i-use-to-profile-c-code-in-linux being subjectively slow there's a simple way to find performance problems. Just halt it several times and each time look.. some code that is wasting some percentage of the time 20 or 50 or whatever that is the probability that you will catch it.. code that is wasting some percentage of the time 20 or 50 or whatever that is the probability that you will catch it in the..
http://stackoverflow.com/questions/4172722/what-is-the-rule-of-three does copying an object mean What are the copy constructor and the copy assignment operator When do I need to declare them.. are the copy constructor and the copy assignment operator When do I need to declare them myself How can I prevent my objects.. I prevent my objects from being copied c copy constructor assignment operator c faq rule of three share improve this..
Undefined Behavior and Sequence Points http://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points Behavior and Sequence Points What are Sequence Points What is the relation.. be sure to visit the follow up question Undefined Behavior and Sequence Points Reloaded . Note This is meant to be an entry.. you want to critique the idea of providing an FAQ in this form then the posting on meta that started all this would be the..
http://stackoverflow.com/questions/1008019/c-singleton-design-pattern me is when exactly the memory is going to be deallocated Or is there a bug and memory leak It seems like there is a problem..
Finding current executable's path without /proc/self/exe http://stackoverflow.com/questions/1023306/finding-current-executables-path-without-proc-self-exe to isolate the platform specific code NSBundle for example Or try to deduce the executable's path from argv 0 PATH and whatnot..
Is 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 A c3 A In each grouping are these statements identical Or is there an extra possibly optimizable copy in some of the initializations..
System(“pause”); - Why is it wrong? http://stackoverflow.com/questions/1107705/systempause-why-is-it-wrong not something to be used then why was I taught to use it Or on the flip side is it really not that bad after all What are..
Case insensitive string comparison in C++ http://stackoverflow.com/questions/11635/case-insensitive-string-comparison-in-c algorithm for this #include boost algorithm string.hpp Or for fewer header dependencies #include boost algorithm string..
Why is “using namespace std;” considered bad practice? http://stackoverflow.com/questions/1452721/why-is-using-namespace-std-considered-bad-practice the same name as a function in std namespace that much Or does this impact program performance noticeably as you get into..
Unnamed/anonymous namespaces vs. static functions http://stackoverflow.com/questions/154469/unnamed-anonymous-namespaces-vs-static-functions or when would this be preferable to using static functions Or are they essentially two ways of doing the exact same thing..
http://stackoverflow.com/questions/1553382/is-delete-equal-to-delete passed through the processor on the last sunny afternoon. Or it might not. All that and an infinite number of other possibilities..
C++ Which is faster: Stack allocation or Heap allocation http://stackoverflow.com/questions/161053/c-which-is-faster-stack-allocation-or-heap-allocation high performing as stack allocation Is there no difference Or are the differences so minute it becomes pointless micro optimization...
http://stackoverflow.com/questions/162941/why-use-pointers is c a 1 Index 1 since the array starts with element 0. Or you could equally do this printf Second char is c a 1 The pointer..
Default constructor with empty brackets http://stackoverflow.com/questions/180172/default-constructor-with-empty-brackets T v std istream_iterator T ifs std istream_iterator T Or if you have C 11 and list initialization also known as uniform..
Initializing private static members http://stackoverflow.com/questions/185844/initializing-private-static-members The class declaration should be in the header file Or in the source file if not shared . File foo.h class foo private..
Determine if two rectangles overlap each other? http://stackoverflow.com/questions/306316/determine-if-two-rectangles-overlap-each-other A is Totally above B So condition for Non Overlap is Cond1 Or Cond2 Or Cond3 Or Cond4 Therefore a sufficient condition for.. above B So condition for Non Overlap is Cond1 Or Cond2 Or Cond3 Or Cond4 Therefore a sufficient condition for Overlap.. B So condition for Non Overlap is Cond1 Or Cond2 Or Cond3 Or Cond4 Therefore a sufficient condition for Overlap is the opposite..
http://stackoverflow.com/questions/3582001/advantages-of-using-forward the type 禃value reference to cv TR creates the type TR. Or in tabular form TR R T T lvalue reference to cv TR lvalue reference..
When and why will an OS initialise memory to 0xCD, 0xDD, etc. on malloc/free/new/delete? http://stackoverflow.com/questions/370195/when-and-why-will-an-os-initialise-memory-to-0xcd-0xdd-etc-on-malloc-free-new usage but wasn't allocated by HeapAlloc or LocalAlloc . Or that memory just has been freed by HeapFree . Disclaimer the..
Undefined Behavior and Sequence Points Reloaded http://stackoverflow.com/questions/4638364/undefined-behavior-and-sequence-points-reloaded i.operator or even syntactically simpler i.add i.inc Or do they too invoke undefined behavior If no why not After all.. behavior which seems to be untrue as far as I understand Or i i is not an expression to begin with If so then what is it..
What's this STL vs. “C++ Standard Library” fight all about? [closed] http://stackoverflow.com/questions/5205491/whats-this-stl-vs-c-standard-library-fight-all-about correctness. Should I refrain from using the term STL Or is this an isolated opinion c stl std c faq share improve..
Why should `new` be used as little as possible? http://stackoverflow.com/questions/6500313/why-should-new-be-used-as-little-as-possible often as possible and what difference it makes internally Or if I misinterpreted the answer feel free to clarify what was..
http://stackoverflow.com/questions/1055661/bigint-bigbit-library integers and bit operations like bit shifting bitwise OR AND position first zero bit speed is crucial so it would have..
C++ Tips for code optimization on ARM devices http://stackoverflow.com/questions/10800372/c-tips-for-code-optimization-on-arm-devices down considerably. In other words it's faster to logical OR the smaller bits together and write them as DWORDS. 4 Be aware.. logical OR the smaller bits together and write them as DWORDS. 4 Be aware of your L1 L2 cache size. As a general rule ARM..
What's the Right Way to use the rand() Function in C++? http://stackoverflow.com/questions/1117292/whats-the-right-way-to-use-the-rand-function-in-c which would be easy to implement but this is a last resort OR Somehow have the seed be set to the computer clock or some other..
http://stackoverflow.com/questions/12135518/is-faster-than intel test.c if a b Do something 1 Compiles to mov eax DWORD PTR esp 24 a cmp eax DWORD PTR esp 28 b jge .L2 jump if a.. 1 Compiles to mov eax DWORD PTR esp 24 a cmp eax DWORD PTR esp 28 b jge .L2 jump if a is b Do something 1 .L2 And.. 1 .L2 And if a b Do something 2 Compiles to mov eax DWORD PTR esp 24 a cmp eax DWORD PTR esp 28 b jg .L5 jump if a is..
How to simulate “Press any key to continue?” http://stackoverflow.com/questions/1449324/how-to-simulate-press-any-key-to-continue line when i input some character and then press ENTER. OR If I use this cin.get or cin.get c it move to next line of instruction..
when is a v-table created in C++? http://stackoverflow.com/questions/1963926/when-is-a-v-table-created-in-c 1 when the class contains at least one virtual function. OR 2 when the immediate base class contains at least one virtual.. base class contains at least one virtual function. OR 3 when any parent class at any level of the hierarchy contains..
How do I guarantee fast shutdown of my win32 app? http://stackoverflow.com/questions/209086/how-do-i-guarantee-fast-shutdown-of-my-win32-app IOCP and can post an application level shutdown code to it OR you can wait on the event in your OVERLAPPED structure AND wait..
g++: how to specify preference of library path? http://stackoverflow.com/questions/2726993/g-how-to-specify-preference-of-library-path LD_LIBRARY_PATH to point to the location of your library. OR Use the rpath option via gcc to linker runtime library search..
C++ DLL Export: Decorated/Mangled names http://stackoverflow.com/questions/2804893/c-dll-export-decorated-mangled-names to avoid that . If I use extern C __declspec dllexport OR a Module Definition I get what appears to be an undecorated..
How is dynamic_cast typically implemented? http://stackoverflow.com/questions/3314944/how-is-dynamic-cast-typically-implemented it make sense to use something like struct Token enum AND OR IF virtual std size_t GetTokenId 0 struct AndToken public Token..
In C/C++, is char* arrayName[][] a pointer to a pointer to a pointer OR a pointer to a pointer? http://stackoverflow.com/questions/3920729/in-c-c-is-char-arrayname-a-pointer-to-a-pointer-to-a-pointer-or-a-pointe C C is char arrayName a pointer to a pointer to a pointer OR a pointer to a pointer I understood multi dimensional arrays..
How do you set, clear and toggle a single bit in C/C++? http://stackoverflow.com/questions/47981/how-do-you-set-clear-and-toggle-a-single-bit-in-c-c improve this question Setting a bit Use the bitwise OR operator to set a bit. number 1 x That will set bit x . Clearing.. bitwise NOT operator ~ then AND it. Toggling a bit The XOR operator ^ can be used to toggle a bit. number ^ 1 x That will..
Operator Precedence vs Order of Evaluation http://stackoverflow.com/questions/5473107/operator-precedence-vs-order-of-evaluation of the left and right operands of the logical AND logical OR and comma operators. For example in the expression p 0 q 0 all..
Copy constructor vs. return value optimization http://stackoverflow.com/questions/665825/copy-constructor-vs-return-value-optimization and copy construct the return value into the local c . OR construct a local temporary and copy construct that into c ... a local temporary and copy construct that into c . OR construct c with the arguments i d share improve this answer..
http://stackoverflow.com/questions/6713637/heap-vs-stack-allocation I would need to for int i 0 i 100 i delete v i delete v OR just delete v is enough Now another example Vector v Vector..
http://stackoverflow.com/questions/6783993/placement-new-and-delete buf new mem Buffer strlen charString delete char buf OR const char charString Hello World void mem operator new sizeof..
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 boost serialization if you don't have that member function OR if you don't override global serialize function... compile error..
How to initialize a vector in c++ [duplicate] http://stackoverflow.com/questions/8906545/how-to-initialize-a-vector-in-c vv 2 12 43 but when i do like this vector int v 2 34 23 OR vector int v 2 v 0 9 it gives an error expected primary expression..
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