Method erase

library/include/BitArray.h:272–274

        }

        void erase(T *ptr) {
            memmove(ptr, ptr+1, sizeof(T)*(m_size - (ptr - m_data))); m_size--;
        }
        void insert(T *ptr, const T &item) {
            int idx = ptr - m_data;
            resize(m_size+1);