¡@
c++ Programming Glossary: rethttp://stackoverflow.com/questions/11269766/no-matches-with-c11-regex regex pattern test regex_constants grep smatch result bool ret false ret regex_search line result pattern cout boolalpha ret.. test regex_constants grep smatch result bool ret false ret regex_search line result pattern cout boolalpha ret endl cout.. false ret regex_search line result pattern cout boolalpha ret endl cout result.size endl return 0 output false 0 c regex..
How do I remove code duplication between similar const and non-const member functions? http://stackoverflow.com/questions/123758/how-do-i-remove-code-duplication-between-similar-const-and-non-const-member-func Let's say I have the following class X where I want to return access to an internal member class Z details class X std.. index ... massive amounts of code for validating index Z ret vecZ index even more code for determining that the Z instance.. fall on Tuesdays for the next thousand years or so ... return ret const Z Z size_t index const identical to non const..
How do exceptions work (behind the scenes) in c++ http://stackoverflow.com/questions/307610/how-do-exceptions-work-behind-the-scenes-in-c I know exceptions are the same thing as doing a bunch of return but it also checks when it needs to stop doing the return... return but it also checks when it needs to stop doing the return. How does it check when to do stop I am taking a guess and.. holds the type of exception and stack location then does returns until it gets there. I am also guessing the only time that..
Using arrays or std::vectors in C++, what's the performance gap? http://stackoverflow.com/questions/381621/using-arrays-or-stdvectors-in-c-whats-the-performance-gap v int p std vector int iterator i int pointer_index S s return s.p 3 movq 32 rdi rax movl 12 rax eax ret int vector_index.. S s return s.p 3 movq 32 rdi rax movl 12 rax eax ret int vector_index S s return s.v 3 movq 8 rdi rax movl 12 rax.. 3 movq 32 rdi rax movl 12 rax eax ret int vector_index S s return s.v 3 movq 8 rdi rax movl 12 rax eax ret Conclusion Indexing..
How to get memory usage at run time in c++? http://stackoverflow.com/questions/669438/how-to-get-memory-usage-at-run-time-in-c 2 getrusage int who RUSAGE_SELF struct rusage usage int ret ret getrusage who usage cout usage.ru_maxrss but i always get.. getrusage int who RUSAGE_SELF struct rusage usage int ret ret getrusage who usage cout usage.ru_maxrss but i always get 0... a process' virtual memory size and resident set size and return the results in KB. On failure returns 0.0 0.0 void process_mem_usage..
how to achieve 4 FLOPs per cycle http://stackoverflow.com/questions/8389648/how-to-achieve-4-flops-per-cycle to achieve 4 FLOPs per cycle How can the theoretical peak performance of 4 floating point operations double precision.. add 's and mul 's can be executed in parallel giving a theoretical max throughput of 4 flops per cycle. However I've not been.. double stoptime void struct timeval t gettimeofday t NULL return double t.tv_sec t.tv_usec 1000000.0 double addmul double..
Function signature-like expressions as C++ template arguments http://stackoverflow.com/questions/4642079/function-signature-like-expressions-as-c-template-arguments typename T class Function template typename Arg typename Ret class Function Ret Arg ... Here Function always takes one parameter... Function template typename Arg typename Ret class Function Ret Arg ... Here Function always takes one parameter. The template..
How to add code at the entry of every function? http://stackoverflow.com/questions/5081123/how-to-add-code-at-the-entry-of-every-function e.g. #include iostream #include utility template typename Ret typename ...Args struct Wrapper template class C Ret C F Args..... Ret typename ...Args struct Wrapper template class C Ret C F Args... class MemberFn C inst public MemberFn C inst inst.. C inst inst inst MemberFn operator const MemberFn delete Ret operator Args ...args return inst . F std forward Args args..
How can I ask the user for elevated permissions at runtime? http://stackoverflow.com/questions/6108851/how-can-i-ask-the-user-for-elevated-permissions-at-runtime file. properties Displays the object's properties. Ret 0 success 0 error #ifdef Q_OS_WIN int genWin32ShellExecute QString..
|