What are the best practices for using std::container in C++11?

What are the best practices for using std::container in C++11?

When using std::container in C++11, it's important to choose the right container for your needs, such as std::vector for dynamic arrays or std::map for key-value pairs.

Can you explain why std::vector is often preferred?

Sure! std::vector is preferred for its dynamic sizing, efficient memory management, and ease of use, making it ideal for most scenarios.

What about std::unordered_map? When should I use it?

std::unordered_map is great for fast lookups and insertions, especially when you don't need the elements to be in order. It's based on hash tables.

Are there any performance considerations I should be aware of?

Yes, consider the overhead of resizing containers, and prefer reserving space in vectors if you know the size in advance to avoid multiple allocations.