How to change elements of a SplDoublyLinkedList
<?php
function change_elements($list,$old_index,$new_index){
$tmp1=$list->offsetGet($old_index);
$tmp2=$list->offsetGet($new_index);
$list->offsetSet($old_index,$tmp2);
$list->offsetSet($new_index,$tmp1);
}
$list=new SplDoublyLinkedList();
$list->push("A");
$list->push("B");
$list->push("C");
/*
OUTPUT
A
B
C
*/
change_elements($list,0,1);
/*
OUTPUT
B
A
C
*/
?>
SplDoublyLinkedList::offsetSet
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplDoublyLinkedList::offsetSet — Sets the value at the specified $index to $value
说明
Sets the value at the specified index to value.
参数
-
index -
The index being set. If
null, the next value will be added after the last item. -
value -
The new value for the
index.
返回值
没有返回值。
错误／异常
Throws OutOfRangeException when index is out of bounds or when index cannot be parsed as an integer.
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User Contributed Notes 1 note
chanel at lipski-development dot de ¶
6 years ago
