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std::partial_sort

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< cpp‎ | algorithm

 
 
Biblioteca algoritmo
Funções
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Functions
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Não modificar operações de seqüência
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Non-modifying sequence operations
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Modificando operações de seqüência
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Modifying sequence operations
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Particionamento operações
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Partitioning operations
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Operações de classificação (em intervalos ordenados)
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Sorting operations (on sorted ranges)
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Binários operações de busca (em intervalos ordenados)
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Binary search operations (on sorted ranges)
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Definir operações (em intervalos ordenados)
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Set operations (on sorted ranges)
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Operações de pilha
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Heap operations
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Mínimo / máximo de operações
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Minimum/maximum operations
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Operações numéricas
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Numeric operations
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C biblioteca
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C library
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Defined in header <algorithm>
template< class RandomIt >
void partial_sort( RandomIt first, RandomIt middle, RandomIt last );
(1)
template< class RandomIt, class Compare >
void partial_sort( RandomIt first, RandomIt middle, RandomIt last, Compare comp );
(2)
Classifica alguns dos elementos no intervalo [first, last) em ordem ascendente. O middle - first primeiro destes elementos são colocados na [first, middle) gama. A ordem dos elementos iguais não é garantido para ser preservado. A ordem dos elementos restantes na [middle, last) intervalo é indeterminado. A primeira versão utiliza operator< para comparar os elementos, a segunda versão utiliza a função de comparação dada comp.
Original:
Sorts some of the elements in the range [first, last) in ascending order. The first middle - first of these elements are placed in the range [first, middle). The order of equal elements is not guaranteed to be preserved. The order of the remaining elements in the range [middle, last) is unspecified. The first version uses operator< to compare the elements, the second version uses the given comparison function comp.
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Índice

[editar] Parâmetros

first, last -
a gama de elementos para classificar
Original:
the range of elements to sort
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comp - comparison function which returns ​true if the first argument is less than the second.

The signature of the comparison function should be equivalent to the following:

 bool cmp(const Type1 &a, const Type2 &b);

The signature does not need to have const &, but the function must not modify the objects passed to it.
The types Type1 and Type2 must be such that an object of type RandomIt can be dereferenced and then implicitly converted to both of them. ​

Type requirements
-
RandomIt must meet the requirements of ValueSwappable and RandomAccessIterator.
-
The type of dereferenced RandomIt must meet the requirements of MoveAssignable and MoveConstructible.

[editar] Valor de retorno

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

O(N·log2(N)), onde as aplicações N = std::distance(first, last) de cmp. Se a memória adicional está disponível, então a complexidade é O(N·log(N))
Original:
O(N·log2(N)), where N = std::distance(first, last) applications of cmp. If additional memory is available, then the complexity is O(N·log(N))
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[editar] Exemplo

#include <algorithm>
#include <functional>
#include <array>
#include <iostream>
 
int main()
{
    std::array<int, 10> s{5, 7, 4, 2, 8, 6, 1, 9, 0, 3};
 
    std::partial_sort(s.begin(), s.begin() + 3, s.end());
    for (int a : s) {
        std::cout << a << " ";
    } 
}

Output:

0 1 2 7 8 6 5 9 4 3

[editar] Veja também

cópias e parcialmente Classifica um intervalo de elementos
Original:
copies and partially sorts a range of elements
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(modelo de função) [edit]
Classifica um intervalo de elementos preservando ordem entre elementos iguais
Original:
sorts a range of elements while preserving order between equal elements
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(modelo de função) [edit]
tipo um intervalo em ordem crescente
Original:
sorts a range into ascending order
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(modelo de função) [edit]