std::unordered_map::at

 

C++

Язык

Понятия (концепции)

Утилиты

Строки

Контейнеры

Алгоритмы

Итераторы

Работа с числами

Ввод / вывод

Локализация

Регулярные выражения (C++11)

Атомарные примитивы (C++11)

Потоки (C++11)

 

Контейнеры

array (C++11)

vector

deque

forward_list (C++11)

list

set

multiset

map

multimap

unordered_set (C++11)

unordered_multiset (C++11)

unordered_map (C++11)

unordered_multimap (C++11)

stack

queue

priority_queue

 

std::unordered_map

Член функций Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

unordered_map::unordered_map

unordered_map::~unordered_map

unordered_map::operator=

unordered_map::get_allocator

Итераторы Original: Iterators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

unordered_map::begin unordered_map::cbegin

unordered_map::end unordered_map::cend

Потенциала Original: Capacity The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

unordered_map::erase

unordered_map::size

unordered_map::max_size

Модификаторы Original: Modifiers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

unordered_map::clear

unordered_map::insert

unordered_map::emplace

unordered_map::emplace_hint

unordered_map::erase

unordered_map::swap

Поиск Original: Lookup The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

unordered_map::count

unordered_map::find

unordered_map::equal_range

Ковш интерфейс Original: Bucket interface The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

unordered_map::begin2

unordered_map::end2

unordered_map::bucket_count

unordered_map::max_bucket_count

unordered_map::bucket_size

unordered_map::bucket

Hash политики Original: Hash policy The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

unordered_map::load_factor

unordered_map::max_load_factor

unordered_map::rehash

unordered_map::reserve

Наблюдателей Original: Observers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

unordered_map::hash_function

unordered_map::key_eq

 

T& at( const Key& key );	(1)	(начиная с C++11)
const T & at( const Key& key ) const;	(2)	(начиная с C++11)

Возвращает ссылку на переведенную значение элемента с ключом эквивалентно key. Если такого элемента не существует, за исключением типа std::out_of_range выбрасывается.

Original:

Returns a reference to the mapped value of the element with key equivalent to key. If no such element exists, an exception of type std::out_of_range is thrown.

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Параметры

key

-

Ключ элемента найти Original: the key of the element to find The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Возвращаемое значение

Ссылки на сопоставленные значения востребованных элементов

Original:

Reference to the mapped value of the requested element

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Исключения

std::out_of_range, если контейнер не имеет элемент с указанным key

Original:

std::out_of_range if the container does not have an element with the specified key

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Сложность

Average case: constant, worst case: linear in size.

См. также

operator[]	предоставляет доступ к указанному элементу (public функция-член)