std::replace_copy, std::replace_copy_if
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| Definido no cabeçalho <algorithm>
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| template< class InputIt, class OutputIt, class T > OutputIt replace_copy( InputIt first, InputIt last, OutputIt d_first, |
(1) | |
| template< class InputIt, class OutputIt, class UnaryPredicate, class T > OutputIt replace_copy_if( InputIt first, InputIt last, OutputIt d_first, |
(2) | |
Copies the all elements from the range [first, last) to another range beginning at d_first replacing all elements satisfying specific criteria with new_value. The first version replaces the elements that are equal to old_value, the second version replaces elements for which predicate p returns true. The source and destination ranges cannot overlap.
Índice |
[editar] 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 | - | o início do intervalo de destino
Original: the beginning of the destination range The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| old_value | - | o valor de elementos a substituir
Original: the value of elements to replace 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 se o valor do elemento deve ser substituído . Original: if the element value should be replaced 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. |
| new_value | - | o valor a ser usado como substituto
Original: the value to use as replacement The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| Type requirements | ||
-InputIt must meet the requirements of InputIterator.
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-OutputIt must meet the requirements of OutputIterator.
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[editar] Valor de retorno
You can help to correct and verify the translation. Click here for instructions.
[editar] Complexidade
last - first aplicações do predicado.last - first applications of the predicate.You can help to correct and verify the translation. Click here for instructions.
[editar] Possível implementação
| First version |
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template<class InputIt, class OutputIt, class T> OutputIt replace_copy(InputIt first, InputIt last, OutputIt d_first, const T& old_value, const T& new_value) { for (; first != last; ++first) { *d_first++ = (*first == old_value) ? new_value : *first; } return d_first; } |
| Second version |
template<class InputIt, class OutputIt, class UnaryPredicate, class T> OutputIt replace_copy_if(InputIt first, InputIt last, OutputIt d_first, UnaryPredicate p, const T& new_value) { for (; first != last; ++first) { *d_first++ = (p( *first ) ? new_value : *first; } return d_first; } |
[editar] Exemplo
The following copy prints a vector, replacing all values over 5 with 99 on the fly.
#include <algorithm> #include <vector> #include <iostream> #include <iterator> #include <functional> int main() { std::vector<int> v{5, 7, 4, 2, 8, 6, 1, 9, 0, 3}; std::replace_copy_if(v.begin(), v.end(), std::ostream_iterator<int>(std::cout, " "), [](int n){return n > 5;}, 99); std::cout << '\n'; }
Saída:
5 99 4 2 99 99 1 99 0 3
[editar] 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) | |
