public member function
<valarray>
valarray<T> apply (T func(T)) const;
valarray<T> apply (T func(const T&)) const;
Apply function
Returns a valarray with each of its elements initialized to the result of applying
func to its corresponding element in
*this.
The valarray returned has the same length as
*this.
Parameters
- func
- Pointer to a function taking an argument of type T (or a constant reference) and returning T.
T is the template type of valarray (the elements' type).
Return value
A
valarray object with the results of applying
func to all the elements of
*this.
Example
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// valarray::apply example
#include <iostream>
#include <valarray>
using namespace std;
int increment (int x) {return ++x;}
int main ()
{
int init[]={10,20,30,40,50};
valarray<int> foo (init,5);
valarray<int> bar = foo.apply(increment);
for (size_t n=0; n<bar.size(); n++)
cout << bar[n] << ' ';
cout << endl;
return 0;
}
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Output:
See also
- valarray::operator=
- Assign content (public member function)
- valarray operators
- Valarray operators (function)