Concatenating two std::vectors

Question

How do I concatenate two std::vectors?

Answer 1

There is an algorithm std::merge from C++17, which is very easy to use when the input vectors are sorted,

Below is the example:

#include 
#include 
#include 

int main()
{
    //DATA
    std::vector v1{2,4,6,8};
    std::vector v2{12,14,16,18};

    //MERGE
    std::vector dst;
    std::merge(v1.begin(), v1.end(), v2.begin(), v2.end(), std::back_inserter(dst));

    //PRINT
    for(auto item:dst)
        std::cout<