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    Ds\Map::first

    (PECL ds >= 1.0.0)

    Ds\Map::first — Returns the first pair in the map

    Description

    public Ds\Map::first(): Ds\Pair

    Returns the first pair in the map.

    Parameters

    This function has no parameters.

    Return Values

    The first pair in the map.

    Errors/Exceptions

    UnderflowException if empty.

    Examples

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

    <?php
    $map     = new \Ds\Map(["a" => 1, "b" => 2, "c" => 3]);
    var_dump($map->first());
    ?>

    The above example will output something similar to:

    object(Ds\Pair)#2 (2) {
  ["key"]=>
  string(1) "a"
  ["value"]=>
  int(1)
}

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