A classe NoRewindIterator

    (PHP 5 >= 5.1.0, PHP 7, PHP 8)

    Introdução

    Este iterador ignora operações de rebobinamento. Isso permite processar um iterador em vários loops foreach parciais.

    Resumo da classe

    class NoRewindIterator extends IteratorIterator {
    /* Métodos */
    public function __construct(Iterator $iterator)
    public function current(): mixed
    public function key(): mixed
    public function next(): void
    public function rewind(): void
    public function valid(): bool
    /* Métodos herdados */
    public function IteratorIterator::current(): mixed
    public function IteratorIterator::getInnerIterator(): ?Iterator
    public function IteratorIterator::key(): mixed
    public function IteratorIterator::next(): void
    public function IteratorIterator::rewind(): void
    public function IteratorIterator::valid(): bool
    }

    Índice

    Melhore Esta Página

    Aprenda Como Melhorar Esta Página • Envie uma Solicitação de Modificação • Reporte um Problema
    ＋adicionar nota

    Notas de Usuários 1 note

    up
    5
    Anonymous
    6 years ago
    As its name implies, NoRewindIterator doesn't invoke the "rewind" method when It reaches the end of the iterator.

Let's demonstrate it by two examles.

In this example the "rewind" method will be invoked after when the "foreache" reaches its end, so, we can repeat printing the same values as many times as we want:

<?PHP
$iterator = new ArrayIterator(['PHP', 'Python', 'Go']);

foreach ($iterator as $item) {
    echo $item.PHP_EOL;
}

foreach ($iterator as $item) {
    echo $item.PHP_EOL;
}
?>

By using the NoRewindIterator, the "rewind" won't be invoked, so, we can't do as we did in previous example:

<?PHP
$iterator = new ArrayIterator(['PHP', 'Python', 'Go']);
$iterator = new NoRewindIterator($iterator);

foreach ($iterator as $item) {
    echo $item.PHP_EOL;
}

// doesn't do anything
foreach ($iterator as $item) {
    echo $item.PHP_EOL;
}

?>
    ＋adicionar nota
    To Top