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std::unordered_map::reserve

Da cppreference.com

 
 
 
std::unordered_map
Funções de membro
Original:
Member functions
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unordered_map::unordered_map
unordered_map::~unordered_map
unordered_map::operator=
unordered_map::get_allocator
Iteradores
Original:
Iterators
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unordered_map::begin
unordered_map::cbegin
unordered_map::end
unordered_map::cend
Capacidade
Original:
Capacity
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unordered_map::erase
unordered_map::size
unordered_map::max_size
Modificadores
Original:
Modifiers
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unordered_map::clear
unordered_map::insert
unordered_map::emplace
unordered_map::emplace_hint
unordered_map::erase
unordered_map::swap
Pesquisa
Original:
Lookup
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unordered_map::count
unordered_map::find
unordered_map::equal_range
Interface de balde
Original:
Bucket interface
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unordered_map::begin2
unordered_map::end2
unordered_map::bucket_count
unordered_map::max_bucket_count
unordered_map::bucket_size
unordered_map::bucket
Política de hash
Original:
Hash policy
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unordered_map::load_factor
unordered_map::max_load_factor
unordered_map::rehash
unordered_map::reserve
Observadores
Original:
Observers
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unordered_map::hash_function
unordered_map::key_eq
 
void reserve( size_type count );
(a partir do C++ 11)
Define o número de baldes para o número necessário para acomodar, pelo menos, elementos count sem exceder fator de carga máxima e rehashes o recipiente, ou seja, coloca os elementos em baldes apropriados, considerando que o número total de baldes mudou. Efetivamente chama 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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Índice

[editar] Parâmetros

count -
nova capacidade do recipiente
Original:
new capacity of the container
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[editar] Valor de retorno

(Nenhum)
Original:
(none)
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[editar] Complexidade

caso médio linear no tamanho do recipiente quadrática pior caso,.
Original:
average case linear in the size of the container, worst case quadratic.
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[editar] Veja também

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