std::map::equal_range

 

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std::map

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map::map

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map::at

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map::begin map::cbegin (C++11)

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map::count

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map::equal_range

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map::upper_bound

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map::key_comp

map::value_comp

 

std::pair<iterator,iterator> equal_range(const Key& key );
std::pair<const_iterator,const_iterator> equal_range(const Key& key )const;

Restituisce un intervallo contenente tutti gli elementi con key chiave nel contenitore. The range is defined by two iterators, one pointing to the first element that is not less than key and another pointing to the first element greater than key. The first iterator may be alternatively obtained with lower_bound(), the second - with upper_bound().

Original:

Returns a range containing all elements with key key in the container. The range is defined by two iterators, one pointing to the first element that is not less than key and another pointing to the first element greater than key. The first iterator may be alternatively obtained with lower_bound(), the second - with upper_bound().

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Parametri

key

-

valore chiave per confrontare gli elementi Original: key value to compare the elements to The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valore di ritorno

std::pair containing a pair of iterators defining the wanted range: the first pointing to the first element that is not less than key and the second pointing to the first element greater than key.

If there are no elements not less than key, past-the-end (see end()) iterator is returned as the first element. Similarly if there are no elements greater than key, past-the-end iterator is returned as the second element.

Complessità

Logarithmic in the size of the container.

Vedi anche

find	trova elemento con chiave specifica Original: finds element with specific key The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
upper_bound	ritorna un iteratore al primo elemento' maggiore di un certo valore Original: returns an iterator to the first element greater than a certain value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
lower_bound	restituisce un iteratore al primo elemento' non inferiore al valore dato Original: returns an iterator to the first element not less than the given value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)