/**
* This method tests the "multiply" method.
*
* @dataProvider data_multiply
*/
public function test_multiply(array $provided, array $expected)
{
$p0 = IDouble\Module::multiply(IDouble\Type::box($provided[0]), IDouble\Type::box($provided[1]));
$e0 = $expected[0];
$this->assertInstanceOf('\\Saber\\Data\\IDouble\\Type', $p0);
$this->assertSame($e0, $p0->unbox());
}
/**
* This method returns the product of all items in the list.
*
* @access public
* @static
* @param ISeq\Type $xs the sequence to be processed
* @return IDouble\Type the result
*/
public static function product(ISeq\Type $xs) : IDouble\Type
{
return $xs->foldLeft(function (IDouble\Type $c, INumber\Type $x) {
return IDouble\Module::multiply($c, $x->toDouble());
}, IDouble\Type::one());
}
