时间:2021-07-01 10:21:17 帮助过:14人阅读
PHP代码实现:
[php]
//迭代器:可帮助构造特定的对象,那些对象能够提供单一标准接口循环或迭代任何类型的可计数数据
class MyIterator implements Iterator {
private $var = array();
public function __construct($array) {
$this->var = $array;
}
public function rewind() {
reset($this->var);
}
public function current() {
$var = current($this->var);
return $var;
}
public function valid() {
$var = $this->current() !== false;
return $var;
}
public function next() {
$var = next($this->var);
return $var;
}
public function key() {
$var = key($this->var);
return $var;
}
}
$values = array('a', 'b', 'c');
$it = new MyIterator($values);
foreach ($it as $a => $b) {
print "$a: $b
";
}
?>
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