(PECL ds >= 1.0.0)
Ds\Map::skip — Returns the pair at a given positional index
positionThe zero-based positional index to return.
Returns the Ds\Pair at the given position.
OutOfRangeException if the position is not valid.
示例 #1 Ds\Map::skip() example
<?php
$map = new \Ds\Map(["a" => 1, "b" => 2, "c" => 3]);
var_dump($map->skip(1));
?>以上示例的输出类似于：
object(Ds\Pair)#2 (2) {
["key"]=>
string(1) "b"
["value"]=>
int(2)
}