Bolt\Helpers\Arr::isIndexed PHP Method

    public static function isIndexed($array)
    {
        if (!is_array($array)) {
            return false;
        }
        return !static::isAssociative($array);
    }

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