Namespace
Varianti

std::unordered_multimap::reserve

Da cppreference.com.

 
 
 
std :: unordered_multimap
Membri funzioni
Original:
Member functions
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unordered_multimap::unordered_multimap
unordered_multimap::~unordered_multimap
unordered_multimap::operator=
unordered_multimap::get_allocator
Iteratori
Original:
Iterators
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unordered_multimap::begin
unordered_multimap::cbegin
unordered_multimap::end
unordered_multimap::cend
Capacità
Original:
Capacity
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unordered_multimap::erase
unordered_multimap::size
unordered_multimap::max_size
Modificatori
Original:
Modifiers
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unordered_multimap::clear
unordered_multimap::insert
unordered_multimap::emplace
unordered_multimap::emplace_hint
unordered_multimap::erase
unordered_multimap::swap
Lookup
Original:
Lookup
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unordered_multimap::count
unordered_multimap::find
unordered_multimap::equal_range
Benna interfaccia
Original:
Bucket interface
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unordered_multimap::begin2
unordered_multimap::end2
unordered_multimap::bucket_count
unordered_multimap::max_bucket_count
unordered_multimap::bucket_size
unordered_multimap::bucket
Politica di Hash
Original:
Hash policy
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unordered_multimap::load_factor
unordered_multimap::max_load_factor
unordered_multimap::rehash
unordered_multimap::reserve
Osservatori
Original:
Observers
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unordered_multimap::hash_function
unordered_multimap::key_eq
 
void reserve( size_type count );
(dal C++11)
Imposta il numero di secchi per il numero necessario per ospitare almeno elementi count senza superare il fattore di carico massimo e rimaneggiamenti del contenitore, cioè mette gli elementi in segmenti appropriati tenuto conto che il numero totale di bucket è cambiato. Chiama efficacemente rehash(std::ceil(count / max_load_factor())).
Original:
Sets the number of buckets to the number needed to accomodate at least count elements without exceeding maximum load factor and rehashes the container, i.e. puts the elements into appropriate buckets considering that total number of buckets has changed. Effectively calls rehash(std::ceil(count / max_load_factor())).
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Indice

[modifica] Parametri

count -
nuova capacità del contenitore
Original:
new capacity of the container
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[modifica] Valore di ritorno

(Nessuno)
Original:
(none)
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[modifica] Complessità

caso medio lineare nella dimensione del, quadratica caso peggiore contenitore.
Original:
average case linear in the size of the container, worst case quadratic.
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[modifica] Vedi anche

reserves at least the specified number of buckets.
This regenerates the hash table.
(membro pubblico funzione) [edit]