Appending a vector to a vector
c++, stdvector, stl
Solution
a.insert(a.end(), b.begin(), b.end());
or
a.insert(std::end(a), std::begin(b), std::end(b));
The second variant is a more generically applicable solution, as `b` could also be an array. However, it requires C++11. If you want to work with user-defined types, use ADL:
using std::begin, std::end;
a.insert(end(a), begin(b), end(b));
Problem
Assuming I have 2 standard vectors: ``` vector<int> a; vector<int> b; ``` Let's also say the both have around 30 elements. - How do I add the vector b to the end of vector a? The dirty way would be iterating through b and adding each element via `vector<int>::push_back()`, though I wouldn't like to do that!