operator||

Obtains the logical OR between corresponding elements of two equally sized valarrays or between a valarray and a specified value of the valarray element type.

template<class Type>
   valarray<bool> operator||(
      const valarray<Type>& _Left,
      const valarray<Type>& _Right
   );
template<class Type>
   valarray<bool> operator||(
      const valarray<Type>& _Left,
      const Type& _Right
   );
template<class Type>
   valarray<bool> operator||(
      const Type& _Left,
      const valarray<Type>& _Right
   );

Parameters

• _Left
  The first of the two valarrays whose respective elements are to be combined with the logical OR or a specified value of the element type to be combined with each element of a valarray.

• _Right
  The second of the two valarrays whose respective elements are to be combined with the logical OR or a specified value of the element type to be combined with each element of a valarray.

Return Value

A valarray whose elements are of type bool and are the element-wise combination of the logical OR operation of _Left and _Right.

Remarks

The logical OR operator|| applies on an element level, counting all nonzero values as true, and the result is a valarray of Boolean values. The bitwise version of OR, operator| by contrast, can result in a valarray of values other than 0 or 1, depending on outcome of the bitwise operation.

Example

// valarray_op_logor.cpp
// compile with: /EHsc
#include <valarray>
#include <iostream>

int main( )
{
   using namespace std;
   int i;

   valarray<int> vaL ( 10 ), vaR ( 10 );
   valarray<bool> vaLOR ( 10 );
   for ( i = 0 ; i < 10 ; i += 2 )
      vaL [ i ] =  0;
   for ( i = 1 ; i < 10 ; i += 2 )
      vaL [ i ] =  i-1;
   for ( i = 0 ; i < 10 ; i += 3 )
      vaR [ i ] =  i;
   for ( i = 1 ; i < 10 ; i += 3 )
      vaR [ i ] =  0;
   for ( i = 2 ; i < 10 ; i += 3 )
      vaR [ i ] =  0;
   
   cout << "The initial Left valarray is:  ( ";
      for ( i = 0 ; i < 10 ; i++ )
         cout << vaL [ i ] << " ";
   cout << ")." << endl;

   cout << "The initial Right valarray is: ( ";
      for ( i = 0 ; i < 10 ; i++ )
         cout << vaR [ i ] << " ";
   cout << ")." << endl;

   vaLOR = ( vaL || vaR );
   cout << "The element-by-element result of "
        << "the logical OR operator|| is the\n valarray: ( ";
      for ( i = 0 ; i < 10 ; i++ )
         cout << vaLOR [ i ] << " ";
   cout << ")." << endl;
}

The initial Left valarray is:  ( 0 0 0 2 0 4 0 6 0 8 ).
The initial Right valarray is: ( 0 0 0 3 0 0 6 0 0 9 ).
The element-by-element result of the logical OR operator|| is the
 valarray: ( 0 0 0 1 0 1 1 1 0 1 ).

Requirements

Header: <valarray>

Namespace: std

See Also

Concepts

<valarray> Members