What are the best practices for using iterators with C++ vectors?
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What are the best practices for using iterators with C++ vectors?
When using iterators with C++ vectors, it's important to ensure that you don't invalidate iterators by modifying the vector. Always prefer using range-based for loops when possible for cleaner code.
Can you explain why iterators might get invalidated?
Iterators can get invalidated when the underlying container is modified, such as when elements are added or removed. For vectors, this can happen if the capacity is exceeded.
What are some common mistakes to avoid with vector iterators?
Common mistakes include dereferencing invalidated iterators, using iterators after modifying the vector, and not checking for the end of the iterator.
How can I safely remove elements while iterating?
You can safely remove elements by using the erase method in combination with the iterator returned by the remove_if algorithm, or by iterating in reverse.
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