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std::valarray::apply

De cppreference.com
< cpp‎ | numeric‎ | valarray
 
 
 
 
valarray<T> apply( T func(T) ) const;
valarray<T> apply( T func(const T&) ) const;
Devuelve una valarray nuevo del mismo tamaño con valores que se adquieren mediante la aplicación de func función de los valores anteriores de los elementos .
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.
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Contenido

[editar] Parámetros

func -
funcionar a aplicar a los valores
Original:
function to apply to the values
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[editar] Valor de retorno

El valarray resultante con los valores adquiridos mediante la aplicación de func función .
Original:
The resulting valarray with values acquired by applying function func.
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[editar] Notas

La función se puede implementar con el tipo de retorno diferente de std::valarray. En este caso, el tipo de reemplazo tiene las siguientes propiedades:
Original:
The function can be implemented with the return type different from std::valarray. In this case, the replacement type has the following properties:
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[editar] Ejemplo

calcula e imprime los 10 primeros factoriales
Original:
calculates and prints the first 10 factorials
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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';
}

Salida:

1 2 6 24 120 720 5040 40320 362880 3628800

[editar] Ver también

Aplica una función a un rango de elementos.
(plantilla de función) [editar]