This piece of code I came across really confuses me, it seems to make use of rvalue semantics in order to print a vector:
std::vector<int> b = {0,0,0,14,15,123,2431};
mergeAndSort(a,b);
for(auto&& i : b)
std::cout << i << ' ';
but what is i set to? and why is an rvalue reference needed to loop through b?
