What are the best practices for using vectors in C++17?

What are the best practices for using vectors in C++17?

In C++17, some best practices for using vectors include using emplace_back for efficiency, reserving space to avoid reallocations, and utilizing range-based for loops for cleaner code.

Can you explain why reserving space is important?

Reserving space in a vector helps to minimize reallocations and copying of elements, which can significantly improve performance, especially in large data sets.

What is emplace_back and how does it differ from push_back?

emplace_back constructs an element in place at the end of the vector, avoiding a copy or move, while push_back requires an existing object to be copied or moved.

Are there any new features in C++17 that enhance vector usage?

Yes, C++17 introduced features like std::optional and std::variant, which can be used alongside vectors for more flexible data handling.