{
return array_push($this->_collection, $element);
}
public function detach(Element $element)
{
$index = array_search($element, $this->_collection);
if ($index !== FALSE) {
unset($this->_collection[$index]);
}
return $index;
}
public function accept(Visitor $visitor)
{
foreach ($this->_collection as $element) {
$element->accept($visitor);
}
}
}
// client
$elementA = new ConcreteElementA("ElementA");
$elementB = new ConcreteElementB("ElementB");
$elementA2 = new ConcreteElementB("ElementA2");
$visitor1 = new ConcreteVisitor1();
$visitor2 = new ConcreteVisitor2();
$os = new ObjectStructure();
$os->attach($elementA);
$os->attach($elementB);
$os->attach($elementA2);
$os->detach($elementA);
$os->accept($visitor1);
$os->accept($visitor2);
