C++ extend a vector with another vector

Question

I'm a C/Python programmer in C++ land working with the STL for the first time.

In Python, extending a list with another list uses the .extend method:

>>> v = [1, 2, 3] >>> v_prime = [4, 5, 6] >>> v.extend(v_prime) >>> print(v) [1, 2, 3, 4, 5, 6] 

I currently use this algorithmic approach to extend vectors in C++:

v.resize(v.size() + v_prime.size()); copy(v_prime.begin(), v_prime.end(), v.rbegin()); 

Is this the canonical way of extending vectors, or if there is a simpler way that I'm missing?

Answer 1

From here

// reserve() is optional - just to improve performance v.reserve(v.size() + distance(v_prime.begin(),v_prime.end())); v.insert(v.end(),v_prime.begin(),v_prime.end());