While Nate’s answer is pretty good already, I’m going to expand on it more specifically for Visual Studio 2010 as requested, and include information on compiling in the various optional components which requires external libraries. If you are using headers only libraries, then all you need to do is to unarchive the boost download and … Read more
Just like with standard library containers, what library you should use depends on your needs. Here’s a convenient flowchart: So the first question is this: What do you need? I Need Full XML Compliance OK, so you need to process XML. Not toy XML, real XML. You need to be able to read and write … Read more
Firstly (IMO) don’t listen to people who say friend is not useful. It IS useful. In many situations you will have objects with data or functionality that are not intended to be publicly available. This is particularly true of large codebases with many authors who may only be superficially familiar with different areas. There ARE … Read more
if (RectA.Left < RectB.Right && RectA.Right > RectB.Left && RectA.Top > RectB.Bottom && RectA.Bottom < RectB.Top ) or, using Cartesian coordinates (With X1 being left coord, X2 being right coord, increasing from left to right and Y1 being Top coord, and Y2 being Bottom coord, increasing from bottom to top — if this is not … Read more
Actually Boost does have such adaptor: boost::adaptors::reverse. #include <list> #include <iostream> #include <boost/range/adaptor/reversed.hpp> int main() { std::list<int> x { 2, 3, 5, 7, 11, 13, 17, 19 }; for (auto i : boost::adaptors::reverse(x)) std::cout << i << ‘\n’; for (auto i : x) std::cout << i << ‘\n’; }
In C++ you have to explicitly name the base class in calling the derived class method. This can be done from any method from the derived class. The override is a special case of the method of the same name. In Java there is no multi inheritance, so you can use super which will uniquely … Read more
Create a function that you want the thread to execute, for example: void task1(std::string msg) { std::cout << “task1 says: ” << msg; } Now create the thread object that will ultimately invoke the function above like so: std::thread t1(task1, “Hello”); (You need to #include <thread> to access the std::thread class.) The constructor’s first argument … Read more
No, don’t spoil it with a break. This is the last remaining stronghold for the use of goto.
In general, returning a reference is perfectly normal and happens all the time. If you mean: int& getInt() { int i; return i; // DON’T DO THIS. } That is all sorts of evil. The stack-allocated i will go away and you are referring to nothing. This is also evil: int& getInt() { int* i … Read more
Inline namespaces are a library versioning feature akin to symbol versioning, but implemented purely at the C++11 level (ie. cross-platform) instead of being a feature of a specific binary executable format (ie. platform-specific). It is a mechanism by which a library author can make a nested namespace look and act as if all its declarations … Read more