std::map::size(3)

okay bestie, welcome to std::map::size(3) from the C++ Standard Libary — manual name folded in right here, typo preserved because details are details 💅✨

✨ NAME ✨

std::map::size — std::map::size (yes bestie, the name is the name, it's giving self-referential main character energy 🎀)

🦋 Synopsis 🦋

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

Returns the number of elements in the container, i.e. std::distance(begin(), end()). That's the whole synopsis tea ☕

🌸 Parameters 🌸

(none) — she takes zero parameters, low-maintenance icon behavior 🫶

💖 Return value 💖

The number of elements in the container. That's the whole answer, no cap 💅

⚡ Complexity ⚡

Constant. The page says constant, bestie — that's the vibe check, and it passes 🔥

🎀 Example 🎀

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

// Run this code

#include <iostream>
#include <map>

int main()
{
    std::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 is empty (public member function)
• max_size — returns the maximum possible number of elements (public member function)
• size — bare size entry from the original See also block, standing right here with no extra description attached
• ssize — returns the size of a container or array
  • (C++17)
  • (function template)
  • (C++20)

source: http://cppreference.com · version/date: 2024.06.10 · page tag: std::map::size(3) — bye bestie, go count your elements and slay 💖🌈