What are common C++ map errors?

What are some common errors I might encounter when using maps in C++?

Some common errors include accessing elements with non-existent keys, iterator invalidation, and memory leaks.

Can you explain iterator invalidation?

Iterator invalidation occurs when the underlying container is modified, making existing iterators invalid. For example, if you erase an element from a map, any iterators pointing to that element become invalid.

How can I avoid memory leaks when using maps?

To avoid memory leaks, ensure that you properly manage the memory of dynamically allocated objects and use smart pointers when possible.

What about performance issues with maps?

Performance issues can arise from frequent insertions and deletions, especially in large maps. Consider using unordered_map for better average performance.