How does resizing a std::vector in C++ work?
An example of an AI chatbot conversation about resizing std::vector in C++.
How does resizing a std::vector in C++ work?
Resizing a std::vector in C++ can be done using the resize() method. It changes the size of the vector, adding or removing elements as needed.
What happens to the elements when I resize a vector?
When you increase the size, new elements are default-initialized. If you decrease the size, elements are removed from the end.
Is resizing a vector expensive in terms of performance?
Yes, resizing can be expensive because it may involve allocating new memory and copying existing elements to the new location.
Are there any best practices for resizing vectors?
It's best to reserve space in advance using reserve() if you know the required size, to avoid multiple reallocations.
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