SplDoublyLinkedList::offsetUnset
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplDoublyLinkedList::offsetUnset — 指定した $index の値を削除する
パラメータ
index-
削除したいインデックス。
戻り値
値を返しません。
エラー / 例外
index が範囲外を指すときや
index が整数として解釈できないときに
OutOfRangeException をスローします。
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User Contributed Notes 1 note
marco dot paulo dot lopes at gmail dot com ¶
13 years ago
When unsetting an offset, the element will be removed from the double linked list. So the following code:
<?php
$obj = new SplDoublyLinkedList();
$obj->push(4);
$obj->push(5);
$obj->push(6);
$obj->offsetUnset(1);
echo "Our Linked List:";
print_r($obj);
?>
Will output:
Our Linked List:SplDoublyLinkedList Object
(
[flags:SplDoublyLinkedList:private] => 0
[dllist:SplDoublyLinkedList:private] => Array
(
[0] => 4
[1] => 5
[2] => 6
)
)
Our New Linked List:SplDoublyLinkedList Object
(
[flags:SplDoublyLinkedList:private] => 0
[dllist:SplDoublyLinkedList:private] => Array
(
[0] => 4
[1] => 6
)
Notice that the element with the index 2 has now the index 1. The original element with index 1 did not only had it's value unset but was also removed from the list.
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