std::flat_set::count(3)

📦 version 2024.07.05, in nixpkgs unstable, opensuse-leap 16.0

💅 std::flat_set::count(3) 💅

okay bestie, welcome to std::flat_set::count(3) from the C++ Standard Libary (yes, that spelling, we're keeping it 💖). This one is short and iconic: it's all about counting matching keys. periodt. ✨

🌸 NAME 🌸

std::flat_set::count — std::flat_set::count

literally the same name twice, no cap. The manpage said it like that, so we're saying it like that. 🫶

✨ Synopsis ✨

size_type count( const Key& key ) const; (1) (since C++23)
template< class K >                      (2) (since C++23)
size_type count( const K& x ) const;

Returns the number of elements with key that compares equivalent to the specified argument. 👑

  1. Returns the number of elements with key key. This is either 1 or 0 since this container does not allow duplicates. 💅
  2. Returns the number of elements with key that compares equivalent to the value x. This overload participates in overload resolution only if the qualified-id Compare::is_transparent is valid and denotes a type. It allows calling this function without constructing an instance of Key. 🧚

🎀 Parameters 🎀

  • key — key value of the elements to count
  • x — alternative value to compare to the keys

💖 Return value 💖

Number of elements with key that compares equivalent to key or x, which, for overload (1), is either 1 or 0. 🌈

🦋 Complexity 🦋

Logarithmic in the size of the container plus linear in the number of elements found. So not free, but also not a whole saga. 😭

💀 Example 💀

This section is incomplete Reason: no example

no example bestie, they left us hanging 🙈. That's literally what the page says, so we're not inventing one. 💜

🍓 See also 🍓

  • find — finds element with specific key (public member function)
  • equal_range — returns range of elements matching a specific key (public member function)

these are your little search besties, go check them out 🫶

🌟 Category: 🌟

  • * Todo no example

mood. 🎀

mwah 💋 this page came from http://cppreference.com, version/date 2024.06.10, and it's std::flat_set::count(3) — bye bestie, go count something! 👑✨

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