Bolt\Helpers\Arr::isAssociative PHP Метод

    public static function isAssociative($array)
    {
        if (!is_array($array) || $array === []) {
            return false;
        }
        return array_keys($array) !== range(0, count($array) - 1);
    }

 public function testNonArraysAreNotIndexedOrAssociative()
 {
     $this->assertFalse(Arr::isIndexed('derp'));
     $this->assertFalse(Arr::isAssociative('derp'));
 }