SplDoublyLinkedList::add

(PHP 5 >= 5.5.0, PHP 7)

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

Descrierea

public SplDoublyLinkedList::add ( mixed $index , mixed $newval ) : void

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

Parametri

index

The index where the new value is to be inserted.

newval

The new value for the index.

Valorile întoarse

Nu este întoarsă nici o valoare.

Erori/Excepții

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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1
lincoln dot du dot j at gmail dot com
3 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
-2
gandung at ppp dot cylab dot cmu dot edu
3 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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