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

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

When using vectors in C++, it's important to consider memory management, performance, and safety. Always reserve space if you know the size in advance, and prefer using emplace_back over push_back for efficiency.

Can you explain why reserving space is important?

Reserving space in a vector helps to minimize reallocations as the vector grows. This can significantly improve performance, especially in scenarios where you know the number of elements in advance.

What about iterating over vectors? Any tips?

Yes! Use range-based for loops for cleaner syntax and better readability. Also, consider using iterators for more complex operations.

Are there any common pitfalls to avoid?

Absolutely! Avoid accessing out-of-bounds elements, and be cautious with iterators when modifying the vector. Always check the size before accessing elements.