/**
* Get counts of items that are new and which ones are completed
* @return Tuple(int, int, int)
*/
public static function countNewAndDoneItems() : Tuple
{
$countNewAndPast = P::partition(function ($item) {
$name = $item->state->getShortname();
return $name === 'expired' || $name === 'completed';
}, Item::all());
list($done, $new) = $countNewAndPast;
$counts = Tuple::create('integer', 'integer');
return $counts(count($done), count($new));
}
public function testPartition()
{
$a = function () {
(yield 5);
(yield 8);
(yield 12);
(yield 10);
};
$is5x = function ($num) {
return $num % 5 === 0 ? TRUE : FALSE;
};
$only5x = P::partition($is5x);
$this->assertEquals([[5, 10], [8, 12]], $only5x($a()));
}