這里有一點(diǎn)問(wèn)題, OuterIterator 應(yīng)該是一個(gè)接口去實(shí)現(xiàn),而不是去繼承一個(gè) Iterator 迭代器, 視頻里更像是自己實(shí)現(xiàn)了一個(gè) OuterIterator
2019-07-11
push和pop操作尾部,shift和unshift操作頭部
<?php //CountableClass.php
class CountMe implements Countable
{
protected $_myCount =3;
public function count(){
return $this->_myCount;
}
}
$obj = new CountMe();
echo $obj->count()."<br />";
echo count($obj)."<Br />";
?>
class CountMe implements Countable
{
protected $_myCount =3;
public function count(){
return $this->_myCount;
}
}
$obj = new CountMe();
echo $obj->count()."<br />";
echo count($obj)."<Br />";
?>
2018-04-09