std::flat_map::size(3)

💖 NAME 💖

std::flat_map::size — std::flat_map::size — okay bestie, this is the std::flat_map::size(3) page from the C++ Standard Libary manual, and it's giving “how many elements are we carrying?” energy 💅

🌸 Synopsis 🌸

size_type size() const noexcept;  (since C++23)

Returns the number of elements in the container adaptor. Equivalent to return c.keys.size(). No cap ✨

🎀 Parameters 🎀

(none) — literally none, not a single parameter in sight 🫶

🦋 Return value 🦋

The number of elements in the container adaptor. That's the whole tea ☕

⭐ Complexity ⭐

Constant. Iconic, efficient, no drama 💫

🔥 Example 🔥

The following code uses size to display the number of elements in a std::flat_map:

// Run this code

#include <iostream>
#include <flat_map>

int main()
{
    std::flat_map<int,char> nums{{1, 'a'}, {3, 'b'}, {5, 'c'}, {7, 'd'}};

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

🖥️ Output

nums contains 4 elements.

🫶 See also 🫶

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

source/version: http://cppreference.com 🌸 date: 2024.06.10 — mwah, bestie 💋