std::remove_copy, std::remove_copy_if
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<metanoindex/>
<tbody> </tbody>| Definido no cabeçalho <algorithm>
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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) | |
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.
Parâmetros
| first, last | - | a gama de elementos para copiar
Original: the range of elements to copy The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| d_first | - | the beginning of the destination range. |
| value | - | the value of the elements not to copy |
| Type requirements | ||
-InputIt must meet the requirements of InputIterator.
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-OutputIt must meet the requirements of OutputIterator.
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Valor de retorno
Iterador para o elemento passado o último elemento copiado.
Original:
Iterator to the element past the last element copied.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Complexidade
Exatamente
last - first aplicações do predicado.Original:
Exactly
last - first applications of the predicate.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Possível implementação
| 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;
}
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| 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;
}
|
Exemplo
The following code outputs a string while erasing the spaces on the fly.
#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';
}
Saída:
before: Text with some spaces
after: Textwithsomespaces
Veja também
remove elementos que satisfazem critérios específicos Original: removes elements satisfying specific criteria The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função) | |