How do I mount a Docker volume while using a Windows host?

It is possible the / is interpreted as an option by the CMD Windows shell. Try first a docker-machine ssh default, in order to open an ssh session in your VM. From there try the docker run again: docker run -v /c/Users/phisch/dev/htdocs:/var/www phisch:dev As commented by thaJeztah in issue 18290: You could consider using docker-compose; … Read more

Is the behaviour of Python’s list += iterable documented anywhere?

From Guido van Rossum: It works the same way as .extend() except that it also returns self. I can’t find docs explaining this. 🙁 Here is the relevant source code taken from listobject.c: list_inplace_concat(PyListObject *self, PyObject *other) { PyObject *result; result = listextend(self, other); if (result == NULL) return result; Py_DECREF(result); Py_INCREF(self); return (PyObject *)self; … Read more

How can I use an array as map value?

You can’t copy arrays by value like that. Here are several solutions, but I recommend #4 for your needs: Use an std::vector instead of an array. Use a map of pointers to arrays of 3 elements: int red[3] = {1,0,0}; int green[3] = {0,1,0}; int blue[3] = {0,0,1}; std::map<int,int(*)[3]> colours; colours.insert(std::pair<int,int(*)[3]>(GLUT_LEFT_BUTTON,&red)); colours.insert(std::pair<int,int(*)[3]>(GLUT_MIDDLE_BUTTON,&blue)); colours.insert(std::pair<int,int(*)[3]>(GLUT_RIGHT_BUTTON,&green)); // Watch … Read more

Template class with template container

You should use template template parameters: template<typename T, template <typename, typename> class Container> // ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ class MyMultibyteString { Container<T, std::allocator<T>> buffer; // … }; This would allow you to write: MyMultibyteString<int, std::vector> mbs; Here is a compiling live example. An alternative way of writing the above could be: template<typename T, template <typename, typename = std::allocator<T>> … Read more