public function test_toNull()
{
$this->assertNull(Option::none()->toNull());
$this->assertEquals($this->helloWorld, Option::some($this->helloWorld)->toNull());
}
/**
* Returns an optional value that has a value of the given argument if the given boolean is true, otherwise,
* returns no value
*
* @param bool $p
* @param $value
* @return Option
*/
public static function iif(bool $p, $value) : Option
{
if ($p == true) {
return Option::some($value);
}
return Option::none();
}
/**
* Returns an option containing the result of applying $f to this option's value
* if it is non-empty
*
* $f should take the wrapped value and return a new value
*/
public function map(callable $f)
{
return !$this->isEmpty() ? Option::just($f($this->get())) : Option::none();
}
