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std::remove_copy, std::remove_copy_if

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< cpp‎ | algorithm

 
 
Bibliothèque d'algorithmes
Fonctions
Original:
Functions
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Non-modification de la séquence des opérations
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Non-modifying sequence operations
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Modification de la séquence des opérations
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Modifying sequence operations
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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
Des opérations de partitionnement
Original:
Partitioning operations
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Opérations de tri (sur les gammes triés)
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Sorting operations (on sorted ranges)
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is_sorted (C++11)
is_sorted_until (C++11)
sort
Opérations binaires de recherche (sur les gammes triés)
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Binary search operations (on sorted ranges)
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Définir les opérations (sur les gammes triés)
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Set operations (on sorted ranges)
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Opérations Heap
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Heap operations
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Minimum / maximum de fonctionnement
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Minimum/maximum operations
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Opérations numériques
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Numeric operations
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Bibliothèque C
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C library
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Defined in header <algorithm>
template< class InputIt, class OutputIt, class T >

OutputIt remove_copy( InputIt first, InputIt last, OutputIt d_first,

                      const T& value );
(1)
template< class InputIt, class OutputIt, class UnaryPredicate >

OutputIt remove_copy_if( InputIt first, InputIt last, OutputIt d_first,

                         UnaryPredicate p );
(2)
Copie les éléments de la gamme [first, last), à une autre gamme débutant à d_first, en omettant les éléments qui satisfont à des critères spécifiques. La première version ne tient pas compte des éléments qui sont égaux à value, la deuxième version ne tient pas compte des éléments pour lesquels prédicat retourne p true. Gammes de source et de destination ne peuvent pas se chevaucher .
Original:
Copies elements from the range [first, last), to another range beginning at d_first, omitting the elements which satisfy specific criteria. The first version ignores the elements that are equal to value, the second version ignores the elements for which predicate p returns true. Source and destination ranges cannot overlap.
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Sommaire

[modifier] Paramètres

first, last -
l'éventail des éléments à copier
Original:
the range of elements to copy
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d_first -
le début de la plage de destination .
Original:
the beginning of the destination range.
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value -
la valeur des éléments non copier
Original:
the value of the elements not to copy
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Type requirements
-
InputIt must meet the requirements of InputIterator.
-
OutputIt must meet the requirements of OutputIterator.

[modifier] Retourne la valeur

Itérateur à l'élément après le dernier élément copié .
Original:
Iterator to the element past the last element copied.
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[modifier] Complexité

Exactement last - first applications du prédicat .
Original:
Exactly last - first applications of the predicate.
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[modifier] Mise en œuvre possible

First version
template<class InputIt, class OutputIt, class T>
OutputIt remove_copy(InputIt first, InputIt last,
                     OutputIt d_first, const T& value)
{
    for (; first != last; ++first) {
        if (!(*first == value)) {
            *d_first++ = *first;
        }
    }
    return d_first;
}
Second version
template<class InputIt, class OutputIt, class UnaryPredicate>
OutputIt remove_copy_if(InputIt first, InputIt last,
                        OutputIt d_first, UnaryPredicate p)
{
    for (; first != last; ++first) {
        if (!p(*first)) {
            *d_first++ = *first;
        }
    }
    return d_first;
}

[modifier] Exemple

Le code suivant génère une chaîne tout en effaçant les espaces à la volée .
Original:
The following code outputs a string while erasing the spaces on the fly.
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#include <algorithm>
#include <iterator>
#include <string>
#include <iostream>
int main()
{
    std::string str = "Text with some   spaces";
    std::cout << "before: " << str << "\n";
 
    std::cout << "after:  ";
    std::remove_copy(str.begin(), str.end(),
                     std::ostream_iterator<char>(std::cout), ' ');
    std::cout << '\n';
}

Résultat :

before: Text with some   spaces
after:  Textwithsomespaces

[modifier] Voir aussi

supprime des éléments répondant à des critères spécifiques
Original:
removes elements satisfying specific criteria
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(fonction générique) [edit]