Ds\Map::first

(PECL ds >= 1.0.0)

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

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

Returns the first pair in the map.

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The first pair in the map.

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UnderflowException if empty.

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

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

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