Espacios de nombres
Variantes
Acciones

std::unique

De cppreference.com
< cpp‎ | algorithm

 
 
Algoritmo biblioteca
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.
Modificación de la secuencia de operaciones
Original:
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.
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.
Clasificación de las operaciones (en rangos ordenados)
Original:
Sorting operations (on sorted ranges)
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Las operaciones binarias de búsqueda (en rangos ordenados)
Original:
Binary search operations (on sorted ranges)
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Conjunto de operaciones (en rangos ordenados)
Original:
Set operations (on sorted ranges)
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Operaciones del montón
Original:
Heap operations
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Mínimo / máximo de operaciones
Original:
Minimum/maximum operations
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Operaciones numéricas
Original:
Numeric operations
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
C biblioteca
Original:
C library
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
 
Defined in header <algorithm>
template< class ForwardIt >
ForwardIt unique( ForwardIt first, ForwardIt last );
(1)
template< class ForwardIt, class BinaryPredicate >
ForwardIt unique( ForwardIt first, ForwardIt last, BinaryPredicate p );
(2)
Quita todos los elementos consecutivos duplicados de la [first, last) rango. Extracción se realiza desplazando el rango cuando sea necesario, de tal manera que los elementos que se borren se sobrescriben. Sólo el primer elemento de cada grupo de elementos iguales se deja. Los elementos entre el viejo y el nuevo final o el rango se dejan intactos. La primera versión utiliza operator== para comparar los elementos, la segunda versión utiliza el predicado binario dado p .
Original:
Removes all consecutive duplicate elements from the range [first, last). Removing is done by shifting the range when needed in such a way that elements to be erased are overwritten. Only the first element in each group of equal elements is left. The elements between the old and the new end or the range are left intact. The first version uses operator== to compare the elements, the second version uses the given binary predicate p.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Contenido

[editar] Parámetros

first, last -
el intervalo de elementos de proceso
Original:
the range of elements to process
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
p - binary predicate which returns ​true if the elements should be treated as equal.

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

 bool pred(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 ForwardIt can be dereferenced and then implicitly converted to both of them.

Type requirements
-
ForwardIt must meet the requirements of ForwardIterator.
-
The type of dereferenced ForwardIt must meet the requirements of MoveAssignable.

[editar] Valor de retorno

Reenviar iterador hasta el final de la nueva gama
Original:
Forward iterator to the new end of the range
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[editar] Posible implementación

First version
template<class ForwardIt>
ForwardIt unique(ForwardIt first, ForwardIt last)
{
    if (first == last)
        return last;
 
    ForwardIt result = first;
    while (++first != last) {
        if (!(*result == *first)) {
            *(++result) = *first;
        }
    }
    return ++result;
}
Second version
template<class ForwardIt, class BinaryPredicate>
ForwardIt unique(ForwardIt first, ForwardIt last, 
                       BinaryPredicate p)
{
    if (first == last)
        return last;
 
    ForwardIt result = first;
    while (++first != last) {
        if (!p(*result, *first)) {
            *(++result) = *first;
        }
    }
    return ++result;
}

[editar] Ejemplo

El código siguiente quita todos los elementos consecutivos equivalentes de un vector de enteros .
Original:
The following code removes all consecutive equivalent elements from a vector of integers.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

#include <iostream>
#include <algorithm>
#include <vector>
 
int main() 
{
    std::vector<int> v{1, 2, 2, 2, 3, 3, 2, 2, 1};
    std::vector<int>::iterator last;
 
    last = std::unique(v.begin(), v.end()); // 1 2 3 2 1 3 2 2 1
                                            //           ^
    for (std::vector<int>::iterator it = v.begin(); it != last; ++it) {
        std::cout << *it << " ";
    }
    std::cout << "\n";
}

Output:

1 2 3 2 1

[editar] Complejidad

lineal en la distancia entre first y last
Original:
linear in the distance between first and last
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[editar] Ver también

encuentra dos idénticas (o alguna otra relación) elementos adyacentes el uno al otro
Original:
finds two identical (or some other relationship) items adjacent to each other
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) [edit]
crea una copia de una cierta gama de elementos que no contiene duplicados consecutivos
Original:
creates a copy of some range of elements that contains no consecutive duplicates
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) [edit]