std::valarray::apply
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| valarray<T> apply( T func(T) ) const; |
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| valarray<T> apply( T func(const T&) ) const; |
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Возвращает новый valarray такого же размера, со значениями, которые приобретаются путем применения функции
func к предыдущим значениям элементов.Original:
Returns a new valarray of the same size with values which are acquired by applying function
func to the previous values of the elements.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.
Содержание |
[править] Параметры
| func | - | функционировать обратиться к значениям
Original: function to apply to the values The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
[править] Возвращаемое значение
В результате valarray с ценностей, приобретенных путем применения функции
func.Original:
The resulting valarray with values acquired by applying function
func.The text has been machine-translated via Google Translate.
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[править] Notes
Эта функция может быть реализована с возвращением тип отличается от std::valarray. В этом случае, замена типа имеет следующие свойства:
Original:
The function can be implemented with the return type different from std::valarray. In this case, the replacement type has the following properties:
The text has been machine-translated via Google Translate.
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- Все const функций-членов std::valarray предоставляются.Original:All const member functions of std::valarray are provided.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - std::valarray, std::slice_array, std::gslice_array, std::mask_array и std::indirect_array может быть построена с заменой типа.Original:std::valarray, std::slice_array, std::gslice_array, std::mask_array and std::indirect_array can be constructed from the replacement type.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - Все функции, принимающие аргументы типа const std::valarray& должны также согласиться с заменой типа.Original:All functions accepting a arguments of type const std::valarray& should also accept the replacement type.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - Все функции принимает два аргумента типа const std::valarray& должны принять все комбинации const std::valarray& и замена типа.Original:All functions accepting two arguments of type const std::valarray& should accept every combination of const std::valarray& and the replacement type.The text has been machine-translated via Google Translate.
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[править] Пример
вычисляет и выводит первые 10 факториалов
Original:
calculates and prints the first 10 factorials
The text has been machine-translated via Google Translate.
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#include <iostream> #include <valarray> #include <cmath> int main() { std::valarray<int> v = {1,2,3,4,5,6,7,8,9,10}; v = v.apply([](int n)->int { return std::round(std::tgamma(n+1)); }); for(auto n : v) { std::cout << n << ' '; } std::cout << '\n'; }
Вывод:
1 2 6 24 120 720 5040 40320 362880 3628800
[править] См. также
| применяет функцию к диапазону элементов (шаблон функции) | |