Answered: How can one quickly and efficiently…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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How can one quickly and efficiently copy a group of shared pointers from one array into another in C++? Create a list of potential responses to the challenge at hand. Do shared pointers and the objects they control get copied when they're copied? Explain

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Step 1

To quickly and efficiently copy a group of shared pointers from one array into another in C++, you can use the std::copy algorithm from the <algorithm> header. Here are some potential responses to this challenge:

Use std::copy with the std::begin and std::end functions to copy the shared pointers from one array to another:

std::copy(std::begin(src_array), std::end(src_array), std::begin(dest_array));

If the destination array already contains shared pointers and you want to replace them, you can use std::copy with the std::move_iterator to move the pointers.

std::copy(std::make_move_iterator(std::begin(src_array)),
std::make_move_iterator(std::end(src_array)),
std::begin(dest_array));

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