SplDoublyLinkedList::isEmpty

    (PHP 5 >= 5.3.0, PHP 7, PHP 8)

    SplDoublyLinkedList::isEmpty — 双方向リンクリストが空かどうかを調べる

    説明

    public SplDoublyLinkedList::isEmpty(): bool

    パラメータ

    この関数にはパラメータはありません。

    戻り値

    双方向リンクリストが空かどうかを返します。

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    User Contributed Notes 1 note

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    lincoln dot du dot j at gmail dot com
    8 years ago
    //isEmpty is a method of SplDoublyLinkedList $obj = new SplDoublyLinkedList();// Check wither linked list is emptyif ($obj->isEmpty()){    $obj->push(2);    $obj->unshift(10);}print_r($obj);//Output like thisSplDoublyLinkedList Object(    [flags:SplDoublyLinkedList:private] => 0    [dllist:SplDoublyLinkedList:private] => Array        (            [0] => 10            [1] => 2        ))
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