containers

问题 I am trying to get my hands dirty on docker. I know that CMD or ENTRYPOINT is used to specify the start/runnable command for docker image and CMD is overridden by ENTRYPOINT . But I don't know, how does it works, when parent docker image, also has CMD OR ENTRYPOINT or BOTH ? Does child image inherit those values from parent docker image ? If so, then does ENTRYPOINT in parent image override CMD in child image ? I know that such question is already discussed at https://github.com/docker

问题 I want to create a control in winforms with same behavior as the container controls. I mean: in design mode, when I drop controls in it, it will group then, just like a groupbox. This control I'm creating contains some other controls AND a GroupBox. All I need is: when a control is droped in design mode over my custom control, I'll just put it inside the nested GroupBox. But I can't figure out how make my control respond to that kind of action in design mode. 回答1: Maybe this is what you need,

问题 I want to create a control in winforms with same behavior as the container controls. I mean: in design mode, when I drop controls in it, it will group then, just like a groupbox. This control I'm creating contains some other controls AND a GroupBox. All I need is: when a control is droped in design mode over my custom control, I'll just put it inside the nested GroupBox. But I can't figure out how make my control respond to that kind of action in design mode. 回答1: Maybe this is what you need,

问题 I need a container of pointers. Would you recommend boost::ptr_vector<T> or std::vector<boost::shared_ptr<T> > ? (Or something else?) If that's of interest, my actual data structure is relatively complicated (see here) and currently stores objects, not pointers, but i'd like to change that (using pointer containers), in order to get rid of unnecessary copying: typedef std::multimap<Foo0, std::map<int, double> > VecElem; std::vector<VecElem> vec; 回答1: Who owns the object? If the container owns

问题 Generally speaking is it a good idea to cache an end iterator (specifically STL containers) for efficiency and speed purposes? such as in the following bit of code: std::vector<int> vint; const std::vector<int>::const_iterator end = vint.end(); std::vector<int>::iterator it = vint.begin(); while (it != end) { .... ++it; } Under what conditions would the end value be invalidated? would erasing from the container cause end to be invalidated in all STL containers or just some? 回答1: In the simple

问题 Should I use deque instead of vector if i'd like to push elements also in the beginning of the container? When should I use list and what's the point of it? 回答1: Use deque if you need efficient insertion/removal at the beginning and end of the sequence and random access; use list if you need efficient insertion anywhere, at the sacrifice of random access. Iterators and references to list elements are very stable under almost any mutation of the container, while deque has very peculiar

问题 I just upgraded to the Windows 10 Anniversary Update (1607, 2016-08-02) and wanted to try Windows containers. I followed the most recent guide I could find: Windows Containers on Windows 10 by Neil Peterson (subject to change!!) But when coming to the Docker run, it could not start the container: C:\WINDOWS\system32>docker run -it nanoserver cmd docker: Error response from daemon: container a39ea9f033493807343489ac180b4469f910db22f93f9364271a6d1aeb077e7b encountered an error during

问题 I am working on a h264 video codec. I want to know: Is a single NAL unit in H264 equivalent to one video frame? 回答1: No, a sequence of NAL units can be decoded into video frames, but they are not equivalent. http://en.wikipedia.org/wiki/H.264/MPEG-4_AVC http://en.wikipedia.org/wiki/Network_Abstraction_Layer#NAL_Units_in_Byte-Stream_Format_Use http://wiki.multimedia.cx/index.php?title=H.264 来源： https://stackoverflow.com/questions/6858991/in-h264-nal-units-means-frame

问题 When designing a C++ library, I read it is bad practice to include standard library containers like std::vector in the public interface (see e.g. Implications of using std::vector in a dll exported function). What if I want to expose a function that takes or returns a list of objects? I could use a simple array, but then I would have to add a count parameter, which makes the interface more cumbersome and less safe. Also it wouldn't help much if I wanted to use a map , for example. I guess

问题 Previously, I used to use MFC collection classes such CArray and CMap . After a while I switched to STL containers and have been using them for a while. Although I find STL much better, I am unable to pin point the exact reasons for it. Some of the reasoning such as : It requires MFC: does not hold because other parts of my program uses MFC It is platform dependent: does not hold because I run my application only on windows.(No need for portability) It is defined in the C++ standard: OK, but