(PECL ds >= 1.0.0)
Ds\Sequence::first โ Returns the first value in the sequence
ใใฎ้ขๆฐใซใฏใใฉใกใผใฟใฏใใใพใใใ
The first value in the sequence.
UnderflowException if empty.
ไพ1 Ds\Sequence::first() example
<?php
$sequence = new \Ds\Vector([1, 2, 3]);
var_dump($sequence->first());
?>ไธใฎไพใฎๅบๅใฏใ ใใจใใฐไปฅไธใฎใใใซใชใใพใใ
int(1)