void swap(valarray& v) noexcept;
Effects: *this obtains the value of v. v obtains the value of *this.
Complexity: Constant.
Returns: The number of elements in the array.
Complexity: constant time.
This function may only be instantiated for a type T to which operator+= can be applied. This function returns the sum of all the elements of the array.
This function returns the minimum value contained in *this. The value returned for an array of length 0 is undefined. For an array of length 1, the value of element 0 is returned. For all other array lengths, the determination is made using operator<.
This function returns the maximum value contained in *this. The value returned for an array of length 0 is undefined. For an array of length 1, the value of element 0 is returned. For all other array lengths, the determination is made using operator<.
valarray<T> shift(int n) const;
This function returns an object of class valarray<T> of length size(), each of whose elements I is (*this)[I + n] if I + n is non-negative and less than size(), otherwise T(). Thus if element zero is taken as the leftmost element, a positive value of n shifts the elements left n places, with zero fill.
[ Example:
If the argument has the value -2,
the first two elements of the result will be value-initialized ([dcl.init]); the third element of the result will be assigned the value
of the first element of the argument; etc.
— end example ]
valarray<T> cshift(int n) const;
This function returns an object of class valarray<T> of length size() that is a circular shift of *this. If element zero is taken as the leftmost element, a non-negative value of n shifts the elements circularly left n places and a negative value of n shifts the elements circularly right -n places.
valarray<T> apply(T func(T)) const;
valarray<T> apply(T func(const T&)) const;
This member function changes the length of the *this array to sz and then assigns to each element the value of the second argument. Resizing invalidates all pointers and references to elements in the array.