std::unordered_map::at - cppreference.com

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`T& at( const Key& key );`	(1)	(desde C++11)

`const T & at( const Key& key ) const;`	(2)	(desde C++11)

Retorna uma referência para o valor mapeado do elemento com chave equivalente a key. Se tal elemento não existe, uma exceção do tipo std::out_of_range é jogado.

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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Parâmetros

key

a chave do elemento de encontrar

Original:

the key of the element to find

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Valor de retorno

Referência ao valor mapeado do elemento solicitado

Original:

Reference to the mapped value of the requested element

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Exceções

std::out_of_range se o recipiente não tem um elemento com a key especificado

Original:

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

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Complexidade

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

Veja também


	acessar o elemento especificado Original: access specified element The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função pública membro) [edit]