iter\IterTest::testApply PHP Method

    public function testApply()
    {
        $range = range(0, 5);
        $result = [];
        apply(function ($n) use(&$result) {
            $result[] = $n;
        }, $range);
        $this->assertSame([0, 1, 2, 3, 4, 5], $result);
    }