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std::swap_ranges

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C++
 
Algoritmo libreria
Funzioni
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Functions
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Non modifica le operazioni di sequenza
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Non-modifying sequence operations
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Modifica delle operazioni di sequenza
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Modifying sequence operations
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Partizionamento operazioni
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Partitioning operations
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Ordinamento delle operazioni (su intervalli ordinati)
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Sorting operations (on sorted ranges)
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Binarie (le operazioni di ricerca sui campi ordinati)
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Binary search operations (on sorted ranges)
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Impostare le operazioni (su intervalli ordinati)
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Set operations (on sorted ranges)
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Heap operazioni
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Heap operations
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Minimo / massimo le operazioni
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Minimum/maximum operations
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Operazioni numeriche
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Numeric operations
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Libreria C
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C library
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Elemento definito nell'header <algorithm>
template< class ForwardIt1, class ForwardIt2 >
ForwardIt2 swap_ranges( ForwardIt1 first1, ForwardIt1 last1, ForwardIt2 first2 )
Elementi di scambi tra [first1, last1) gamma e un altro intervallo a partire da first2.
Original:
Exchanges elements between range [first1, last1) and another range starting at first2.
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Indice

[modifica] Parametri

first1, last1 -
la prima gamma di elementi da scambiare
Original:
the first range of elements to swap
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first2 -
all'inizio del secondo intervallo di elementi da scambiare
Original:
beginning of the second range of elements to swap
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Type requirements
-
ForwardIt1, ForwardIt2 must meet the requirements of ForwardIterator.
-
The types of dereferenced ForwardIt1 and ForwardIt2 must meet the requirements of Swappable

[modifica] Valore di ritorno

Iterator all'elemento passato l'ultimo elemento scambiato all'inizio gamma con first2.
Original:
Iterator to the element past the last element exchanged in the range beginning with first2.
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[modifica] Possibile implementazione

template<class ForwardIt1, class ForwardIt2>
ForwardIt1 swap_ranges(ForwardIt1 first1, 
                             ForwardIt1 last1, 
                             ForwardIt2 first2)
{
    while (first1 != last1) {
        std::iter_swap(first1++, first2++);
    }
    return first2;
}

[modifica] Esempio

Viene illustrato lo scambio di intervalli secondari di contenitori diversi
Original:
Demonstrates swapping of subranges from different containers
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#include <algorithm>
#include <list>
#include <vector>
#include <iostream>
int main()
{
    std::vector<int> v = {1, 2, 3, 4, 5};
    std::list<int> l = {-1, -2, -3, -4, -5};
 
    std::swap_ranges(v.begin(), v.begin()+3, l.begin());
 
    for(int n : v)
       std::cout << n << ' ';
    std::cout << '\n';
    for(int n : l)
       std::cout << n << ' ';
    std::cout << '\n';
}

Output: 

-1 -2 -3 4 5
1 2 3 -4 -5

[modifica] Complessità

lineare la distanza tra first e last
Original:
linear in the distance between first and last
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[modifica] Vedi anche
swap gli elementi a cui punta due iteratori
Original:
swaps the elements pointed to by two iterators
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(funzione di modello) [modifica]
scambia i valori di due oggetti
Original:
swaps the values of two objects
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(funzione di modello) [modifica]
Estratto da "https://it.cppreference.com/mwiki/index.php?title=cpp/algorithm/swap_ranges&oldid=24997"