One of the example where std::ref is necessary: void update(int &data) //expects a reference to int { data = 15; } int main() { int data = 10; // This doesn’t compile as the data value is copied when its reference is expected. //std::thread t1(update, data); std::thread t1(update, std::ref(data)); // works t1.join(); return 0; } … Read more
Update (Aug-2016): This question is no longer relevant, as msys2 now comes with cygpath in its installation. … I’ll summarize my research here. The cygpath equivalent in MSYS is to use this command: { cd /c/some/path && pwd -W; } | sed ‘s”https://stackoverflow.com/”\\|g’ The problem with this approach is that it requires existing path, e.g. … Read more
I got curious about this so decided to see what exactly is done by fmt.Println. http://golang.org/src/pkg/fmt/print.go If you scroll to the very bottom, you’ll see an if addnewline where \n is always used. I can’t hardly speak for if this is the most “cross-platform” way of doing it, and go was originally tied to linux … Read more
Updated 16th of January 2019: Refined advice as tools evolve. I have used autotools before for a considerable amount of time. Currently I make intensive use of meson and cmake only when I need it. Some personal advice: for big teams, stick to CMake if you want to make use of the generators for XCode. … Read more
Mostly correct. Straight procedural interface is the best. (which is not entirely the same as C btw(**), but close enough) I interface DLLs a lot(*), both open source and commercial, so here are some points that I remember from daily practice, note that these are more recommended areas to research, and not cardinal truths: Watch … Read more
Brian “Beej Jorgensen” Hall gives in his Guide to Network Programming some code to pack float (resp. double) to uint32_t (resp. uint64_t) to be able to safely transmit it over the network between two machine that may not both agree to their representation. It has some limitation, mainly it does not support NaN and infinity. … Read more
Personally I’d go with the option of not using placement new on the array and instead use placement new on each item in the array individually. For example: int main(int argc, char* argv[]) { const int NUMELEMENTS=20; char *pBuffer = new char[NUMELEMENTS*sizeof(A)]; A *pA = (A*)pBuffer; for(int i = 0; i < NUMELEMENTS; ++i) { … Read more
We also converted existing libraries to portable libraries and it works fine. You have to modify the project file. Replace the following line: <Import Project=”…” /> with <Import Project=”$(MSBuildExtensionsPath32)\Microsoft\Portable\$(TargetFrameworkVersion)\Microsoft.Portable.CSharp.targets” /> Add following line inside a PropertyGroup tag <ProjectTypeGuids>{786C830F-07A1-408B-BD7F-6EE04809D6DB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids> And remove following lines from the AssemblyInfo.cs file [assembly: ComVisible(false)] [assembly: Guid(“…”)] After that, Visual Studio should … Read more
You could use the following test to differentiate Octave from MATLAB: isOctave = exist(‘OCTAVE_VERSION’, ‘builtin’) ~= 0;
I wouldn’t say its easy, but you can use the shell function of GNU make to execute a shell command like gcc –version and then use the ifeq conditional expression to check the version number and set your CFLAGS variable appropriately. Here’s a quick example makefile: CC = gcc GCCVERSION = $(shell gcc –version | … Read more