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std::unordered_map::reserve

De cppreference.com

 
 
 
std::unordered_map
Las funciones miembro
Original:
Member functions
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unordered_map::unordered_map
unordered_map::~unordered_map
unordered_map::operator=
unordered_map::get_allocator
Los iteradores
Original:
Iterators
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unordered_map::begin
unordered_map::cbegin
unordered_map::end
unordered_map::cend
Capacidad
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
Buscar
Original:
Lookup
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unordered_map::count
unordered_map::find
unordered_map::equal_range
Bucket interfaz
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 Hash
Original:
Hash policy
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unordered_map::load_factor
unordered_map::max_load_factor
unordered_map::rehash
unordered_map::reserve
Los observadores
Original:
Observers
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unordered_map::hash_function
unordered_map::key_eq
 
void reserve( size_type count );
(desde C++11)
Establece el número de cubos para el número necesario para acomodar al menos elementos count sin exceder el factor de carga máxima y refritos el contenedor, es decir, coloca los elementos en segmentos apropiados teniendo en cuenta que el número total de cubos ha cambiado. Efectivamente llama 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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Contenido

[editar] Parámetros

count -
nueva capacidad del recipiente
Original:
new capacity of the container
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[editar] Valor de retorno

(Ninguno)
Original:
(none)
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[editar] Complejidad

caso lineal media en el tamaño del recipiente, cuadrática peor de los casos .
Original:
average case linear in the size of the container, worst case quadratic.
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[editar] Ver también

reserves at least the specified number of buckets.
This regenerates the hash table.
(miembro público función) [edit]