public function __construct(AbstractBinaryTree $left = NULL, AbstractBinaryTree $right = NULL, $data)
{
parent::__construct($data);
$this->left = $left;
$this->right = $right;
if ($this->left != NULL) {
$this->directChildrenCount++;
}
if ($this->right != NULL) {
$this->directChildrenCount++;
}
}
public function __construct(array $children, $data)
{
parent::__construct($data);
// simulating array object type hinting :((
if (count($children)) {
foreach ($children as $v) {
if ($v instanceof NaryTree) {
$this->directChildrenCount++;
} else {
throw new IllegalArgumentException();
}
}
} else {
$this->directChildrenCount = 0;
}
$this->children = $children;
}
