/**
* Combines all elements of an NumArray at a given axis with the `$callback`
* function recursive
*
* @param mixed $data given data
* @param callback $callback callback fucntion
* @param int $axis given axis
*
* @return mixed
*
* @since 1.0.0
*/
protected static function reduceRecursive($data, $callback, $axis = null)
{
if (is_array($data)) {
if (!is_null($axis) && $axis > 0) {
foreach ($data as $key => $value) {
$data[$key] = self::reduceRecursive($value, $callback, $axis - 1);
}
return $data;
}
$sum = array_shift($data);
foreach ($data as $value) {
$sum = Map::mapArray($sum, $value, $callback);
}
if ($axis === 0) {
return $sum;
}
return self::reduceRecursive($sum, $callback);
}
return $data;
}
/**
* Divides the NumArray with a divisor
*
* @param mixed $divisor divisor
*
* @return $this
*
* @throws DivideByZeroException will be thrown, when dividing by zero
*
* @api
* @since 1.0.4
*/
public function div($divisor)
{
if ($divisor instanceof NumArray) {
$divisor = $divisor->getData();
}
$this->data = Map::mapArray($this->data, $divisor, function ($data1, $data2) {
if ($data2) {
return $data1 / $data2;
}
throw new DivideByZeroException("Dividing by zero is forbidden");
});
$this->shape = Shape::getShape($this->data);
$this->flushCache();
return $this;
}