SplDoublyLinkedList::rewind()函數是PHP中的一個內置函數,用於將迭代器後退到起點或起點。
用法:
void SplDoublyLinkedList::rewind( void )
參數:該函數不接受任何參數。
返回值:它不返回任何值。
以下示例程序旨在說明PHP中的SplDoublyLinkedList::rewind()函數:
示例1:
<?php
// Declare an empty SplDoublyLinkedList
$list = new \SplDoublyLinkedList;
// Use SplDoublyLinkedList::add() function to
// add elements to the SplDoublyLinkedList
$list->add(0, 30);
$list->add(1, 20);
$list->add(2, 30);
$list->add(3, "Geeks");
$list->add(4, 'G');
// Use rewind() function
$list->rewind();
// Use SplDoublyLinkedList::current() function
// to get the current element
var_dump($list->current());
?>
輸出:
int(30)
示例2:
<?php
// Declare an empty SplDoublyLinkedList
$list = new \SplDoublyLinkedList();
// Use SplDoublyLinkedList::push() function to
// add elements to the SplDoublyLinkedList
$list->push(1);
$list->push(2);
$list->push(3);
$list->push(8);
$list->push(5);
// Use rewind() function
$list->rewind();
// Display the elements of
// doubly linked list
var_dump($list);
?>
輸出:
object(SplDoublyLinkedList)#1 (2) { ["flags":"SplDoublyLinkedList":private]=> int(0) ["dllist":"SplDoublyLinkedList":private]=> array(5) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(8) [4]=> int(5) } }
參考: https://www.php.net/manual/en/spldoublylinkedlist.rewind.php
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