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
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
New Perspectives on HTML5, CSS3, and JavaScript
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ISBN:9781305503922
Author:Patrick M. Carey
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Chapter14: Exploring Object-based Programming: Designing An Online Poker
Section14.1: Visual Overview: Custom Objects, Properties, And Methods
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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
Expert Solution
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::copywith thestd::beginandstd::endfunctions 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::copywith thestd::move_iteratorto 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));
std::make_move_iterator(std::end(src_array)),
std::begin(dest_array));
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