std::set::size(3)

💖 NAME 💖

Welcome to std::set::size(3), straight from the C++ Standard Libary — yes, that’s the spelling on the page, and I’m keeping it exactly as-is, no cap 💅

std::set::size — okay so the NAME line literally says std::set::size and then std::set::size again. That’s the name, bestie, no plot twist 🎀

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🦋 Synopsis 🦋

size_type size() const;  (noexcept since C++11)

Returns the number of elements in the container, i.e. std::distance(begin(), end()). Since C++11 it’s noexcept, periodt ✨

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🌸 Parameters 🌸

(none) — literally zero parameters. not a single argument. the void of parameters. 🕳️✨

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🎀 Return value 🎀

The number of elements in the container. That’s it, bestie — the return value is giving “count of elements” and nothing else 💖

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⭐ Complexity ⭐

Constant. No cap, it’s constant complexity, and that’s the whole vibe 🌈

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🍓 Example 🍓

The following code uses size to display the number of elements in a std::set<int>:

// Run this code

#include <iostream>
#include <set>

int main()
{
    std::set<int> nums{1, 3, 5, 7};

    std::cout << "nums contains " << nums.size() << " elements.\n";
}

Output:

nums contains 4 elements.

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💜 See also 💜

The original table is a lil scrambled, but every piece is right here, iykyk:

• empty — checks whether the container is empty (public member function)
• max_size — returns the maximum possible number of elements (public member function)
• size — (C++17) returns the size of a container or array (function template)
• ssize — (C++20) returns the size of a container or array (function template)

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mwah 💋 source/date from the footer: http://cppreference.com, 2024.06.10 — catch you in the next one, bestie 🫶