What are the new container features in C++11?

What are the new container features introduced in C++11?

C++11 introduced several new features for containers, including initializer lists, the std::array, and std::unordered_map. These enhancements improve usability and performance.

Can you explain how to use std::array?

Sure! std::array is a fixed-size array that provides the benefits of standard containers. You can initialize it like this: std::array<int, 5> arr = {1, 2, 3, 4, 5};.

What about std::unordered_map? How is it different from std::map?

std::unordered_map uses hash tables for storage, providing average constant time complexity for lookups, while std::map is implemented as a balanced tree, offering logarithmic time complexity.

Are there any performance considerations I should be aware of?

Yes, std::unordered_map is generally faster for lookups, but it can use more memory due to its hash table structure. Choose based on your specific needs.