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

What are the 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 invalidating an iterator means?

Invalidating an iterator means that the iterator no longer points to a valid element in the container, often due to modifications like adding or removing elements.

What should I do if I need to modify a list while iterating over it?

You can use the erase method with the iterator to safely remove elements while iterating. Just make sure to update the iterator after erasing.

Are there any specific types of iterators I should prefer?

Yes, prefer using range-based for loops when possible, as they are safer and more readable. For more complex operations, consider using standard algorithms.