HH\Vector::firstValue
Returns the first value in the current Vector
public function firstValue(): ?Tv;
Returns
Examples
The following example gets the first value from Vector
. An empty Vector
will return null
as its first value.
$v = Vector {'red', 'green', 'blue', 'yellow'};
var_dump($v->firstValue());
$v = Vector {};
var_dump($v->firstValue());
string(3) "red"
NULL