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c++ Programming Glossary: hadFinding current executable's path without /proc/self/exe http://stackoverflow.com/questions/1023306/finding-current-executables-path-without-proc-self-exe argv 0 but it doesn't seem entirely reliable. If you ever had to support say Mac OS X which doesn't have proc what would you..
Is gcc4.7 buggy about regular expressions? [duplicate] http://stackoverflow.com/questions/12530406/is-gcc4-7-buggy-about-regular-expressions At the time lots of people were grateful to have had access to bleeding edge features long before C 11 was finished..
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 your macro always means the same thing. Let's say you had something like your second macro. #define BAR X f x g x Now..
Unnamed/anonymous namespaces vs. static functions http://stackoverflow.com/questions/154469/unnamed-anonymous-namespaces-vs-static-functions accessible within the file they're created in as if you had an implicit using clause to them. My question is why or when..
C++ Which is faster: Stack allocation or Heap allocation http://stackoverflow.com/questions/161053/c-which-is-faster-stack-allocation-or-heap-allocation may sound fairly elementary but this is a debate I had with another developer I work with. I was taking care to stack..
http://stackoverflow.com/questions/162941/why-use-pointers Now we are using the character itself instead. If we had used s instead of c we would have asked prinf to print the content.. by 'a' plus one in this example above and we wouldn't have had to put the in front printf Second char is s a 1 WRONG But this..
http://stackoverflow.com/questions/3106110/what-is-move-semantics want to inspect x later and would be very surprised if x had changed somehow. Did you notice how I just said x three times.. no circumstance could the client detect that the source had been modified. Since we don't really do a copy here we call..
Finding C++ static initialization order problems http://stackoverflow.com/questions/335369/finding-c-static-initialization-order-problems that you are trying to get rid of but just have not had time yet you are going to get rid of them eventually arn't you..
http://stackoverflow.com/questions/356950/c-functors-and-their-uses function call. And that makes it just as efficient as if I had manually called the function on each value of the vector. If.. called the function on each value of the vector. If I had passed a function pointer instead the compiler couldn't immediately..
http://stackoverflow.com/questions/402283/stdwstring-vs-stdstring 8. On Windows On Windows this is a bit different. Win32 had to support a lot of application working with char and on different..
What is the proper declaration of main? http://stackoverflow.com/questions/4207134/what-is-the-proper-declaration-of-main an explicit return statement it's the same as if you had written return 0 . The following two main functions have the..
Checking if a double (or float) is nan in C++ http://stackoverflow.com/questions/570669/checking-if-a-double-or-float-is-nan-in-c that makes a difference UPDATE Thanks for the responses I had this solved by using isnan form math.h which doesn't exist in..
How to determine CPU and memory consumption from inside a process? http://stackoverflow.com/questions/63166/how-to-determine-cpu-and-memory-consumption-from-inside-a-process CPU and memory consumption from inside a process I once had the task of determining the following performance parameters.. currently used CPU currently used by my process The code had to run on Windows and Linux. Even though this seems to be a..
Why is one loop so much slower than two loops? http://stackoverflow.com/questions/8547778/why-is-one-loop-so-much-slower-than-two-loops fall on the same cache way. However Intel processors have had 8 way L1 cache associativity for a while. But in reality the..
What is “rvalue reference for *this”? http://stackoverflow.com/questions/8610571/what-is-rvalue-reference-for-this ' rvalue reference kept in overload set Note however that had we not provided any ref qualifier and as such not overloaded..
Which kind of pointer do I use when? http://stackoverflow.com/questions/8706192/which-kind-of-pointer-do-i-use-when I wrote C for a living std auto_ptr was all the std lib had available and boost shared_ptr was all the rage. I never really..
std::to_string - more than instance of overloaded function matches the argument list http://stackoverflow.com/questions/10664699/stdto-string-more-than-instance-of-overloaded-function-matches-the-argument to_string double val string to_string long double val Had all of these overloads been present obviously you wouldn't have..
localtime returns GMT for windows programs running on cygwin shells http://stackoverflow.com/questions/11655003/localtime-returns-gmt-for-windows-programs-running-on-cygwin-shells interpret Cygwin's TZ variable. So it defaults to GMT. Had the program been built with GCC under Cygwin I bet it would..
Is it possible to hash pointers in portable C++03 code? http://stackoverflow.com/questions/14167455/is-it-possible-to-hash-pointers-in-portable-c03-code the same value. In fact this is the approach MSVC2012 uses Had our hypothetical pointer implementation simply always initialized..
http://stackoverflow.com/questions/2173493/virtual-table-c print n From main.cpp Base b new Derived b print Question Had there been no vtable for class derived then the output would..
Const method that modifies *this without const_cast http://stackoverflow.com/questions/3484233/const-method-that-modifies-this-without-const-cast qualification of the pointed to objects not the pointers. Had k above been const int const the latter const is irrelevant... just like with int i above we have well defined behavior. Had we had const foo f f.bar UB We would have had UB just like with..
Comprehensive tutorial for beginners on how to write Windows GUI programs http://stackoverflow.com/questions/3726642/comprehensive-tutorial-for-beginners-on-how-to-write-windows-gui-programs to actually make controls on a windows form do something. Had I known what I now know about C# earlier I most likely would..
Passing non-const references to rvalues in C++ http://stackoverflow.com/questions/4084053/passing-non-const-references-to-rvalues-in-c this was a common source of bugs in the early C days. Had I designed C my preference would have been to allow non const..
Pure virtual functions may not have an inline definition. Why? http://stackoverflow.com/questions/4174694/pure-virtual-functions-may-not-have-an-inline-definition-why time I saw no chance of getting a new keyword accepted. Had I suggested pure Release 2.0 would have shipped without abstract..
http://stackoverflow.com/questions/5232198/about-vectors-growth Vectors growth Had been going through the Book C Primer Third Edition By Stanley..
http://stackoverflow.com/questions/726096/accessing-private-members data members in an indirect way if it is not ethical. EDIT Had to edit this further... I am pretty sure the class wouldn't..
C++: optimizing member variable order? http://stackoverflow.com/questions/892767/c-optimizing-member-variable-order even though they're operating on different fields. Had they been operating on different cache lines then they would.. That's all an array is in C C adjacent objects in memory. Had the struct been int int char char then the same object could..
Move assignment operator and `if (this != &rhs)` http://stackoverflow.com/questions/9322174/move-assignment-operator-and-if-this-rhs of software they have to rewrite because it is too slow. Had dumb_array been designed differently it could have satisfied..
Cannot access private member declared in class 'QReadWriteLock'Error http://stackoverflow.com/questions/9507604/cannot-access-private-member-declared-in-class-qreadwritelockerror1error-c22
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