std::map::count(3)

🌸 NAME 🌸

okay so this is std::map::count(3), straight from the C++ Standard Libary manual — yes bestie, “Libary” with one “r,” we’re keeping it exactly like that 🫶.

std::map::count - std::map::count (the name is the name, no notes 💅).

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✨ Synopsis ✨

size_type count( const Key& key ) const; (1)
template< class K >                      (2) (since C++14)
size_type count( const K& x ) const;

Returns the number of elements with key that compares equivalent to the specified argument. Let’s break it down:

1. Returns the number of elements with key key. This is either 1 or 0 since this container does not allow duplicates. periodt, no dupes allowed 💀
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. iconic behavior honestly 🎀

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🎀 Parameters 🎀

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

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💖 Return value 💖

Number of elements with key that compares equivalent to key or x, which, for overload (1), is either 1 or 0. that’s it, that’s the tea ☕

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🦋 Complexity 🦋

Logarithmic in the size of the container plus linear in the number of elements found. so like, she’s not free, but she’s not doing a full sweep either, iykyk ✨

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🌈 Notes 🌈

feature-test macro vibe check 👑

• Feature-test macro: __cpp_lib_generic_associative_lookup
• Value: 201304L
• Std: (C++14)
• Feature: Heterogeneous comparison lookup in associative containers; overload (2)

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🍓 Example 🍓

This section is incomplete.

Reason: no example.

bestie they left us hanging 😭 no example, but the reason is literally “no example” — we respect the honesty 💀

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👑 See also 👑

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

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🧚 Category 🧚

• * Todo no example

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source: http://cppreference.com — dated 2024.06.10. mwah 💋 slay.