std::partition_copy

 

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Funciones Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Para no modificar la secuencia de las operaciones Original: Non-modifying sequence operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
all_of any_of none_of (C++11) (C++11) (C++11) for_each count count_if mismatch equal	find find_if find_if_not (C++11) find_end find_first_of adjacent_find search search_n
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copy copy_if (C++11) copy_n (C++11) copy_backward move (C++11) move_backward (C++11) fill fill_n transform generate generate_n remove remove_if remove_copy remove_copy_if	replace replace_if replace_copy replace_copy_if swap swap_ranges iter_swap reverse reverse_copy rotate rotate_copy random_shuffle shuffle   (C++11) unique unique_copy
Particionamiento operaciones Original: Partitioning operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is_partitioned (C++11) partition partition_copy (C++11)	stable_partition partition_point (C++11)
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Defined in header <algorithm>
template< class InputIt, class OutputIt1,           class OutputIt2, class UnaryPredicate > std::pair<OutputIt1, OutputIt2>      partition_copy(InputIt first, InputIt last,                     OutputIt1 d_first_true, OutputIt2 d_first_false,                     UnaryPredicate p);		(desde C++11)

Copia los elementos que satisfacen el predicado de la p [first, last) amplia gama de principios en d_first_true y copia los elementos que no cumplan p al inicio de arena a d_first_false .

Original:

Copies the elements that satisfy the predicate p from the range [first, last) to the range beginning at d_first_true, and copies the elements that do not satisfy p to the range beginning at d_first_false.

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Parámetros

first, last	-	la gama de elementos a ordenar Original: the range of elements to sort The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
d_first_true	-	el comienzo del rango de salida para los elementos que satisfacen p Original: the beginning of the output range for the elements that satisfy p The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
d_first_false	-	el comienzo del rango de salida para los elementos que no satisfacen p Original: the beginning of the output range for the elements that do not satisfy p The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
p	-	unary predicate which returns ​true si el elemento debe ser colocado en d_first_true Original: if the element should be placed in d_first_true The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. . 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 InputIt can be dereferenced and then implicitly converted to Type. ​
Type requirements
- InputIt must meet the requirements of InputIterator.
- OutputIt1 must meet the requirements of OutputIterator.
- OutputIt2 must meet the requirements of OutputIterator.

Valor de retorno

Un pair construido a partir de la iterador al final del intervalo de d_first_true y el iterador al final del intervalo de d_first_false .

Original:

A pair constructed from the iterator to the end of the d_first_true range and the iterator to the end of the d_first_false range.

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Complejidad

Exactamente distance(first, last) aplicaciones de p .

Original:

Exactly distance(first, last) applications of p.

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Posible implementación

template<class InputIt, class OutputIt1, class OutputIt2, class UnaryPredicate> std::pair<OutputIt1, OutputIt2> partition_copy(InputIt first, InputIt last, OutputIt1 d_first_true, OutputIt2 d_first_false, UnaryPredicate p) { while (first != last) { if (p(*first)) { *d_first_true = *first; ++d_first_true; } else { *d_first_false = *first; ++d_first_false; } ++first; } return std::pair<OutputIt1, OutputIt2>(d_first_true, d_first_false); }

Ejemplo

#include <iostream>
#include <algorithm>
#include <utility>
 
int main()
{
    int arr [10] = {1,2,3,4,5,6,7,8,9,10};
    int true_arr [5] = {0};
    int false_arr [5] = {0};
 
    std::partition_copy(std::begin(arr), std::end(arr), std::begin(true_arr),std::begin(false_arr),
                        [] (int i) {return i > 5;});
 
    std::cout << "true_arr: ";
    for (auto it = std::begin(true_arr); it != std::end(true_arr); ++it) {
        std::cout << *it << ' ';
    }
    std::cout << '\n'; 
 
    std::cout << "false_arr: ";
    for (auto it = std::begin(false_arr); it != std::end(false_arr); ++it) {
        std::cout << *it << ' ';
    }
    std::cout << '\n'; 
 
    return 0;
 
}

Output:

true_arr: 6 7 8 9 10
false_arr: 1 2 3 4 5

Ver también

partition	divide una serie de elementos en dos grupos Original: divides a range of elements into two groups The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (función de plantilla)
stable_partition	elementos divide en dos grupos, preservando su orden relativo Original: divides elements into two groups while preserving their relative order The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (función de plantilla)