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SplDoublyLinkedList::add

(PHP 5 >= 5.5.0, PHP 7, PHP 8)

SplDoublyLinkedList::addAdd/insert a new value at the specified index

Beschreibung

public SplDoublyLinkedList::add(int $index, mixed $value): void

Insert the value value at the specified index, shuffling the previous value at that index (and all subsequent values) up through the list.

Parameter-Liste

index

The index where the new value is to be inserted.

value

The new value for the index.

Rückgabewerte

Es wird kein Wert zurückgegeben.

Fehler/Exceptions

Throws OutOfRangeException when index is out of bounds or when index cannot be parsed as an integer.

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User Contributed Notes 2 notes

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0
lincoln dot du dot j at gmail dot com
6 years ago
$a = new SplDoublyLinkedList;
$arr=[1,2,3,4,5,6,7,8,9];

for($i=0;$i<count($arr);$i++){
$a->add($i,$arr[$i]);
}

print_r($a);

//Output:

SplDoublyLinkedList Object
(
[flags:SplDoublyLinkedList:private] => 0
[dllist:SplDoublyLinkedList:private] => Array
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
[5] => 6
[6] => 7
[7] => 8
[8] => 9
)

)
up
-6
gandung at ppp dot cylab dot cmu dot edu
7 years ago
Maybe the basic usage is like this i think..

$a = new \SplDoublyLinkedList;

if ($a instanceof \SplDoublyLinkedList) {
$a->add(0, 'Paulus');
$a->add(1, 'Gandung');
$a->add(2, 'Prakosa');

// then, iterate over that because \SplDoublyLinkedList
// is implementing \Iterator interface.
foreach ($a as $value) {
echo sprintf("%s\n", $value);
}
}
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