Ds\Vector::map

    (PECL ds >= 1.0.0)

    Ds\Vector::map — Returns the result of applying a callback to each value

    Beschreibung

    publicDs\Vector::map(callable$callback): Ds\Vector

    Returns the result of applying a callback function to each value in the vector.

    Parameter-Liste

    callback

    callback(mixed$value): mixed

    A callable to apply to each value in the vector.

    The callable should return what the new value will be in the new vector.

    Rückgabewerte

    The result of applying a callback to each value in the vector.

    Hinweis:

    The values of the current instance won't be affected.

    Beispiele

    Beispiel #1 Ds\Vector::map() example

    <?php
    $vector     = new \Ds\Vector([1, 2, 3]);

    print_r($vector->map(function($value) { return $value * 2; }));
    print_r($vector);
    ?>

    Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

    Ds\Vector Object ( [0] => 2 [1] => 4 [2] => 6 ) Ds\Vector Object ( [0] => 1 [1] => 2 [2] => 3 )
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