What are some best practices for using iterators in C++?

What are some best practices for using iterators in C++?

When using iterators in C++, it's important to ensure that you don't invalidate them. Always be cautious when modifying the container.

Can you explain what iterator invalidation means?

Iterator invalidation occurs when the underlying container is modified in a way that makes existing iterators unusable. For example, adding or removing elements can invalidate iterators.

What are some common mistakes to avoid with iterators?

Common mistakes include dereferencing invalidated iterators, using iterators after the container has been destroyed, and not checking for end conditions.

How can I safely modify a container while iterating over it?

To safely modify a container while iterating, consider using the erase-remove idiom or iterating with a for loop that tracks the current position.