How do I remove an element from a C++ std::vector?

How do I remove an element from a C++ std::vector?

You can remove an element from a std::vector using the erase() method. For example, if you have a vector named 'vec', you can remove the element at index 'i' with 'vec.erase(vec.begin() + i);'

What if I want to remove all occurrences of a specific value?

You can use the std::remove algorithm followed by erase. For example: 'vec.erase(std::remove(vec.begin(), vec.end(), value), vec.end());'

Can you explain how std::remove works?

Sure! std::remove shifts the elements that are not equal to the value to the front of the vector and returns an iterator to the new end. The elements that are removed are left in an unspecified state.

Is there a way to remove elements while iterating through the vector?

Yes, you can use a loop with the erase-remove idiom or use a reverse iterator to safely remove elements while iterating.