/**
* Return one of the collected element.
*
* @return Optional Any collected element or {@see Optional::absent()} if no element has been collected.
*/
public function get()
{
if (empty($this->values)) {
return Optional::absent();
}
return Optional::of($this->values[intval(rand(0, count($this->values) - 1))]);
}
public function testOptionalEquals()
{
$opt = Optional::absent();
$this->assertTrue($opt->equals($opt));
$this->assertTrue($opt->equals(Optional::absent()));
$this->assertFalse($opt->equals(Optional::of([0, 1, 2])));
$this->assertFalse($opt->equals([0, 1, 2]));
$opt = Optional::of([0, 1, 2]);
$this->assertTrue($opt->equals($opt));
$this->assertTrue($opt->equals(Optional::of([0, 1, 2])));
$this->assertFalse($opt->equals(Optional::absent()));
$this->assertFalse($opt->equals(Optional::of([2, 3, 4])));
$this->assertFalse($opt->equals([0, 1, 2]));
}
/**
* Removing the collected element.
*/
public function reset()
{
$this->current = Optional::absent();
}
/**
* Remove the collected element.
*/
public function reset()
{
$this->optional = Optional::absent();
}
/**
* Reduce the stream using the given function. The reduce method will be called with
* two Optional value.
*
* @param callable|functions\BiFunction $reducer The reduce function to apply.
* @param mixed $default Default value
*
* @return Optional Value after the reduce operation if exists.
*/
public function reduceWithDefault($reducer, $default)
{
$res = $this->reduce($reducer);
return $res->isEmpty() ? Optional::fromNullable($default) : $res;
}
