Ds\Sequence::first

    (PECL ds >= 1.0.0)

    Ds\Sequence::first — Returns the first value in the sequence

    Descrizione

    abstract public Ds\Sequence::first(): mixed

    Returns the first value in the sequence.

    Elenco dei parametri

    Questa funzione non contiene parametri.

    Valori restituiti

    The first value in the sequence.

    Errori/Eccezioni

    UnderflowException if empty.

    Esempi

    Example #1 Ds\Sequence::first() example

    <?php
    $sequence     = new \Ds\Vector([1, 2, 3]);
    var_dump($sequence->first());
    ?>

    Il precedente esempio visualizzerà qualcosa simile a:

    int(1)

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