containers

I have a dedicated server with multiple IP addresses, some IP's have mac address associated while others(in a subnetwork) doesn't have mac addresses. I have created docker macvlan network using: docker network create -d macvlan -o macvlan_mode=bridge --subnet=188.40.76.0/26 --gateway=188.40.76.1 -o parent=eth0 macvlan_bridge I have ip: 88.99.102.115 with mac: 00:50:56:00:60:42. Created a container using: docker run --name cont1 --net=macvlan_bridge --ip=88.99.102.115 --mac-address 00:50:56:00:60:42 -itd nginx This works, I can access nginx hosted at that ip address from outside. Case with IP

I have the following class: template <typename T> class A { public: void method(const char *buffer); // the template T is used inside this method for a local variable }; Now I need an array of instances of this class with different templates like: std::vector<A*> array; array.push_back(new A<uint32_t>); array.push_back(new A<int32_t>); But std::vector<A*> array; wont work, because I apparently need to specify a Template, but i can't so that because I store different types in this array. Is there some kind of generic type or an other solution? You need a base class: class ABase { public:

I came across one requirement where the record is stored as Name : Employee_Id : Address where Name and Employee_Id are supposed to be keys that is, a search function is to be provided on both Name and Employee Id. I can think of using a map to store this structure std::map< std:pair<std::string,std::string> , std::string > // < < Name , Employee-Id> , Address > but I'm not exactly sure how the search function will look like. Boost.Multiindex This is a Boost example In the above example an ordered index is used but you can use also a hashed index: #include <boost/multi_index_container.hpp>

On https://doc-snapshots.qt.io/qtcreator-extending/coding-style.html it is recommended to write for loops like the following: Container::iterator end = large.end(); for (Container::iterator it = large.begin(); it != end; ++it) { //...; } instead of for (Container::iterator it = large.begin(); it != large.end(); ++it) { //...; } Since I have rarely seen this style in any code, I would like to know whether the consecutive call of end() really adds a noticeable run-time overhead for large loops over stl containers or whether compilers already optimize such cases. Edit: As many of to very good

I need a template like this, which work perfectly template <typename container> void mySuperTempalte (const container myCont) { //do something here } then i want to specialize the above template for std::string so i came up with template <typename container> void mySuperTempalte (const container<std::string> myCont) { //check type of container //do something here } which doesnt't work, and throws an error. I would like to make the second example work and then IF possible i would like to add some code in the template to check if a std::vector/std::deque/std::list was used, to do something

Docker provides an interactive stats command, docker stats [cid] which gives up to date information on the CPU usage, like so: CONTAINER CPU % MEM USAGE/LIMIT MEM % NET I/O 36e8a65d 0.03% 4.086 MiB/7.798 GiB 0.05% 281.3 MiB/288.3 MiB I'm trying to get the CPU usage as a percentage in a digestible format to do some analysis. I've seen the stats in /sys/fs which seem to provide similar values as the Docker Remote API which gives me this JSON blob: { "cpu_usage": { "usage_in_usermode": 345230000000, "total_usage": 430576697133, "percpu_usage": [ 112999686856, 106377031910, 113291361597,