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c++ Programming Glossary: thenWhy is “using namespace std;” considered bad practice? http://stackoverflow.com/questions/1452721/why-is-using-namespace-std-considered-bad-practice happen to match. If you have used foo Blah and bar Quux then the introduction of foo Quux would have been a non event. share..
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom functionality to create a local copy of the data then takes the copied data with a swap function swapping the old.. the old data with the new data. The temporary copy then destructs taking the old data with it. We are left with a copy.. the old data gets put into the temporary. The old data is then released when the function returns. Where upon the parameter's..
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 to their cost. If n samples are taken and f is the cost then I will appear on nf sqrt nf 1 f samples. Example n 10 f 0.3..
Undefined Behavior and Sequence Points http://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points want to critique the idea of providing an FAQ in this form then the posting on meta that started all this would be the place..
http://stackoverflow.com/questions/4421706/operator-overloading want to critique the idea of providing an FAQ in this form then the posting on meta that started all this would be the place..
http://stackoverflow.com/questions/4810664/how-do-i-use-arrays-in-c want to critique the idea of providing an FAQ in this form then the posting on meta that started all this would be the place.. elements std cout x 3 x 7 std endl If x denotes an array then array to pointer decay will kick in because adding an array.. a pointer to the first or any other element of an array then array to pointer decay is not necessary because the pointer..
Why can templates only be implemented in the header file? http://stackoverflow.com/questions/495021/why-can-templates-only-be-implemented-in-the-header-file this is to write the template declaration in a header file then implement the class in an implementation file for example .tpp..
Why is iostream::eof inside a loop condition considered wrong? http://stackoverflow.com/questions/5605125/why-is-iostreameof-inside-a-loop-condition-considered-wrong will be the end of the stream. Consider this and assume then next read will be at the end of the stream while inStream.eof..
Where and why do I have to put the “template” and “typename” keywords? http://stackoverflow.com/questions/610245/where-and-why-do-i-have-to-put-the-template-and-typename-keywords inUnion is a template id. But where exactly And should it then assume that inUnion is a class template i.e. inUnion U names.. last node no specialization of inUnion U has been found then U is not one of the types T1...Tn and I try to typedef an array.. of a name but can just grammatically analyze the input and then create a parse tree out of it. In C the above can yield different..
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 you call a method stuff is pushed onto the stack. If you then pass a pointer to the stack back out of your method as the original..
http://stackoverflow.com/questions/1120140/csv-parser-in-c result I would just create a class representing a row. Then stream into that object #include iterator #include iostream..
Why is processing a sorted array faster than an unsorted array? http://stackoverflow.com/questions/11227809/why-is-processing-a-sorted-array-faster-than-an-unsorted-array will stop back up and yell at you to flip the switch. Then it can restart down the other path. If you guess right every.. and wait until the previous instructions are complete. Then you continue down the correct path. Modern processors are complicated.. need to flush the pipeline and roll back to the branch. Then you can restart down the other path. If you guess right every..
Why aren't my include guards preventing recursive inclusion and multiple symbol definitions? http://stackoverflow.com/questions/14909997/why-arent-my-include-guards-preventing-recursive-inclusion-and-multiple-symbol subsequent directive #defines A_H defines the macro A_H . Then the preprocessor will meet the directive #include b.h the preprocessor.. subsequent directive #defines B_H defines the macro B_H . Then the directive #include a.h will tell the preprocessor to process..
How come a non-const reference cannot bind to a temporary object? http://stackoverflow.com/questions/1565600/how-come-a-non-const-reference-cannot-bind-to-a-temporary-object or historic issues were also involved I don't know. Then some specific case emerged and it was decided that against all..
http://stackoverflow.com/questions/1647631/c-state-machine-design like typedef struct int st int ev int fn void tTransition Then you define your states and events with simple defines the ANY.. 1 #define EV_KEYPRESS 5000 #define EV_MOUSEMOVE 5001 Then you define all the functions that are called by the transitions..
How to use QueryPerformanceCounter? http://stackoverflow.com/questions/1739259/how-to-use-queryperformancecounter using and assigning it to Timer's startingTicks variable. Then to find the amount of time passed I just subtract the function's..
What is the slicing problem in C++? http://stackoverflow.com/questions/274626/what-is-the-slicing-problem-in-c So an object of type B has two data members foo and bar Then if you were to write this B b A a b Then the information in.. foo and bar Then if you were to write this B b A a b Then the information in b about member bar is lost in a. share improve..
C++ Standard Library: How to write wrappers for cout, cerr, cin and endl? http://stackoverflow.com/questions/2879555/c-standard-library-how-to-write-wrappers-for-cout-cerr-cin-and-endl question Why not using std cin using std cout and so on Then in your code you can use cin cout and so on without accidentally..
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 is 0.1 so all of these costs are equally likely a priori. Then suppose we take just 2 stack samples and we see instruction.. . In other words our prior certainty is that I is cheap. Then we get Prior P f x x P o 2 2 f x P o 2 2 f x P o 2 2 f x P..
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 I first construct the house and get hold of its address. Then I do something to the house use it the ... code left as an exercise..
Why should `new` be used as little as possible? http://stackoverflow.com/questions/6500313/why-should-new-be-used-as-little-as-possible Line class as a building block class Table Line borders 4 Then int main Table table allocates 4 std string instances 4 Line..
OpenCV 2.3 C++ Visual Studio 2010 http://stackoverflow.com/questions/7011238/opencv-2-3-c-visual-studio-2010 the C interface that refer to C headers as opencv2 core . Then add the path of the libraries on Configuration Properties Linker..
What is “rvalue reference for *this”? http://stackoverflow.com/questions/8610571/what-is-rvalue-reference-for-this f2 test will only match rvalues linked to 'void test f ' Then the argument list containing an implied object argument is matched..
Why does changing 0.1f to 0 slow down performance by 10x? http://stackoverflow.com/questions/9314534/why-does-changing-0-1f-to-0-slow-down-performance-by-10x of the code _MM_SET_FLUSH_ZERO_MODE _MM_FLUSH_ZERO_ON Then the version with 0 is no longer 10x slower and actually becomes..
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