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std::stable_partition

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< cpp‎ | algorithm

 
 
Algoritmo biblioteca
Funciones
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Functions
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Para no modificar la secuencia de las operaciones
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Non-modifying sequence operations
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Modificación de la secuencia de operaciones
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Modifying sequence operations
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Particionamiento operaciones
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Partitioning operations
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stable_partition
partition_point(C++11)
Clasificación de las operaciones (en rangos ordenados)
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Sorting operations (on sorted ranges)
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Las operaciones binarias de búsqueda (en rangos ordenados)
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Binary search operations (on sorted ranges)
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Conjunto de operaciones (en rangos ordenados)
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Set operations (on sorted ranges)
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Operaciones del montón
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Heap operations
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Mínimo / máximo de operaciones
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Minimum/maximum operations
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Operaciones 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 BidirIt, class UnaryPredicate >
BidirIt stable_partition( BidirIt first, BidirIt last, UnaryPredicate p );
Reordena los elementos de la [first, last) rango de tal manera que todos los elementos para los que el predicado p vuelve true preceder a los elementos para los que predicado p vuelve false. Orden relativo de los elementos se conserva .
Original:
Reorders the elements in the range [first, last) in such a way that all elements for which the predicate p returns true precede the elements for which predicate p returns false. Relative order of the elements is preserved.
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Contenido

[editar] Parámetros

first, last -
la gama de elementos a ordenar
Original:
the range of elements to reorder
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p - unary predicate which returns ​true
si el elemento debe pedirse antes de otros elementos
Original:
if the element should be ordered before other elements
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.

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

 bool pred(const Type &a);

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

Type requirements
-
BidirIt must meet the requirements of ValueSwappable and BidirectionalIterator.
-
The type of dereferenced BidirIt must meet the requirements of MoveAssignable and MoveConstructible.

[editar] Valor de retorno

Iterador al primer elemento del segundo grupo
Original:
Iterator to the first element of the second group
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[editar] Complejidad

Exactamente last-first aplicaciones del predicado y en la mayoría de los swaps (last-first)*log(last-first) si no hay suficiente memoria o el número lineal de las permutas si hay suficiente memoria disponible .
Original:
Exactly last-first applications of the predicate and at most (last-first)*log(last-first) swaps if there is insufficient memory or linear number of swaps if sufficient memory is available.
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[editar] Ejemplo

#include <iostream>
#include <algorithm>
 
int main()
{
    std::vector<int> v{0, 0, 3, 0, 2, 4, 5, 0, 7};
    std::stable_partition(v.begin(), v.end(), [](int n){return n>0;});
    for (int n : v) {
        std::cout << n << ' ';
    }
    std::cout << '\n';
}

Output:

3 2 4 5 7 0 0 0 0

[editar] Ver también

divide una serie de elementos en dos grupos
Original:
divides a range of elements into two groups
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(función de plantilla) [edit]