What are the best practices for using vectors in C++11?

What are the best practices for using vectors in C++11?

Some best practices include using emplace_back for efficiency, reserving space to avoid reallocations, and using iterators for traversal.

Why should I use emplace_back instead of push_back?

emplace_back constructs the object in place, which can be more efficient than push_back, especially for complex objects.

How can I avoid unnecessary reallocations when using vectors?

You can use the reserve method to allocate enough memory for your expected number of elements, preventing reallocations.

Are there any performance considerations I should be aware of?

Yes, consider the cost of copying elements, the impact of resizing, and the overhead of dynamic memory allocation.

Can you give an example of using iterators with vectors?

Sure! You can use a range-based for loop or standard algorithms like std::sort to work with vector iterators efficiently.