containers

How can I declare template class (adaptor) with different containers as template arguments? For example, I need to declare class: template<typename T, typename Container> class MyMultibyteString { Container buffer; ... }; And I want it to my based on vector. How to make it hard-defined? (to prevent someone from writing such declaration MyMultibyteString<int, vector<char>> ). Moreover, how to implement such construction: MyMultibyteString<int, std::vector> mbs; without passing template argument to container. You should use template template parameters : template<typename T, template <typename,

What are containers/adapters ? Someone please explain in layman's language . I have tried to look up on the internet but the definitions and explanations are too technical and hard to understand. I have basic knowledge of C++ and its sub-topics like (class/templates/STL). EDIT 1: Can anyone please give me a practical example of the application of containers/adapters? Just for better understanding :-) Thank you. <joke> C++ is technical and hard to understand :-D </joke> Containers are data types from STL that can contain data. Example: vector as a dynamic array Adapters are data types from STL

I'd like to create the following infrastructure flow: How can that be achieved using Docker? Firstly you need to install a SSH server in the images you wish to ssh-into. You can use a base image for all your container with the ssh server installed. Then you only have to run each container mapping the ssh port (default 22) to one to the host's ports (Remote Server in your image), using -p <hostPort>:<containerPort> . i.e: docker run -p 52022:22 container1 docker run -p 53022:22 container2 Then, if ports 52022 and 53022 of host's are accessible from outside, you can directly ssh to the

The python documentation frequently speaks of "containers". E.g. : If check_circular is False (default: True), then the circular reference check for container types will be skipped and a circular reference will result in an OverflowError (or worse). But I can't find any official definition of containers, neither a list of them. Edit For Python 2.7.3: Checked builtin types which are containers: ( isinstance(object, collections.Container) returns True ) Containers which have a __contains__ method defined: All builtin sequence types: Lists, bytearrays, strings, unicode strings and tuples.

I cannot find a way of moving docker running containers from one host to another. Is there any way I can push my containers to repositories like we do for images ? Currently, I am not using data volumes to store the data associated with applications running inside containers. So some data resides inside containers, which I want to persist before redesigning the setup. You cannot move a running docker container from one host to another. You can commit the changes in your container to an image with docker commit , move the image onto a new host, and then start a new container with docker run .

How to get a last element of ES6 Map/Set without iterations(forEach or for of) pass through a full length of the container? Maps are iterable and ordered, but they are not arrays so they don't have any indexed access. Iterating to the final element is the best you can do. The simplest case being Array.from(map.values()).pop(); 来源： https://stackoverflow.com/questions/30921283/how-to-get-a-last-element-of-es6-map-without-iterations

In c++11 array , string , and vector all got the data method which: Returns pointer to the underlying array serving as element storage. The pointer is such that range [ data() ; data() + size() ) is always a valid range, even if the container is empty. [ Source ] This method is provided in a mutable and const version for all applicable containers, for example: T* vector<T>::data(); const T* vector<T>::data() const; All applicable containers, that is, except string which only provides the const version : const char* string::data() const; What happened here? Why did string get shortchanged, when

I used to believe that in operator in Python checks the presence of element in some collection using equality checking == , so element in some_list is roughly equivalent to any(x == element for x in some_list) . For example: True in [1, 2, 3] # True because True == 1 or 1 in [1., 2., 3.] # also True because 1 == 1. However, it is well-known that NaN is not equal to itself. So I expected that float("NaN") in [float("NaN")] is False . And it is False indeed. However, if we use numpy.nan instead of float("NaN") , the situation is quite different: import numpy as np np.nan in [np.nan, 1, 2] # True

derrend@laptop ~/topdir $ docker version Client version: 1.7.1 Client API version: 1.19 Go version (client): go1.4.2 Git commit (client): 786b29d OS/Arch (client): linux/amd64 Server version: 1.7.1 Server API version: 1.19 Go version (server): go1.4.2 Git commit (server): 786b29d OS/Arch (server): linux/amd64 derrend@laptop ~/topdir $ pwd; ls * $HOME/topdir Dockerfile afolder: afile As I understand it, when I execute a docker build the afolder and its contents will be included inside my docker image but where will they be placed if I do not designate a location in the Dockerfile ? Those files

I have a problem with volumes in docker-compose yml 3.0+ So I know that a volume behaves like a mount.. But I have set up a wiki and when i set a volume in the docker-compose, the data on the container will be removed (hidden) So how can I save data from my container to my host first and the next time I start the container, it will just overrides the data I saved. So the current situation is: I start with "docker-compose up --build" and a volume is created (empty) and will be copied to the container.. Everything in that folder on the container is deleted as a result docker-compose.yml version: