std::replace_copy, std::replace_copy_if
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Defined in header <algorithm> | ||
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.
目次 |
[編集]パラメータ
| first, last | - | コピーする要素の範囲 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 | - | 目的の範囲の始まり 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 | - | 置換する要素の値 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 要素の値を交換する必要があります . 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 | - | 代替品として使用する値 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. |
| 型の要件 | ||
-InputIt は InputIteratorの要求を満足しなければなりません。 | ||
-OutputIt は OutputIteratorの要求を満足しなければなりません。 | ||
[編集]値を返します
You can help to correct and verify the translation. Click here for instructions.
[編集]複雑性
last - firstアプリケーション.last - first applications of the predicate.You can help to correct and verify the translation. Click here for instructions.
[編集]可能な実装
| First version |
|---|
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;} |
[編集]例
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';}
出力:
5 99 4 2 99 99 1 99 0 3
[編集]参照
特定の条件を満たす要素を削除します 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. (関数テンプレート) | |
