std::unorde...ltimap::size(3)

💅 std::unorde...ltimap::size(3) 💅

okay so bestie, welcome to the C++ Standard Libary manual — yes, “Libary” is literally how the header spells it, and we’re not fixing it, we’re respecting the icon behavior. 😌 The title up top is the truncated-looking std::unorde...ltimap::size(3), and this whole page is about std::unordered_multimap::size. It’s lowkey the easiest win in the entire container world. 🫶

🌸 NAME 🌸

std::unordered_multimap::size — std::unordered_multimap::size

that’s it, that’s the name, no notes 💅

✨ Synopsis ✨

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

So you call .size() on your std::unordered_multimap, and it returns the number of elements in the container, i.e. std::distance(begin(), end()). periodt. ✨

🎀 Parameters 🎀

(none) — not a single argument, not a secret optional vibe, nothing. 💀

💖 Return value 💖

The number of elements in the container. That’s the whole tea. 🍓

🦋 Complexity 🦋

Constant. fr fr. 💅

🔥 Example 🔥

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

The page also drops a little // Run this code marker right before the block:

#include <iostream>
#include <unordered_map>

int main()
{
    std::unordered_multimap<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 is empty (public member function)
• max_size — returns the maximum possible number of elements (public member function)
• size — (C++17) — the original places it right above the shared returns the size of a container or array description
• ssize — returns the size of a container or array (function template) (C++20)

and that’s the whole page, bestie! footer vibes, lovingly preserved: source http://cppreference.com, date 2024.06.10, and title std::unorde...ltimap::size(3). 💖✨🎀