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SplDoublyLinkedList::add

(PHP 5 >= 5.5.0, PHP 7)

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

说明

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

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

参数

index

The index where the new value is to be inserted.

newval

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 2 notes

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1
gandung at ppp dot cylab dot cmu dot edu
11 months 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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0
lincoln dot du dot j at gmail dot com
7 months 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
        )

)
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