Is there a way to check if one of the array entries contains a sub-array in MongoDB?

[JaneS]

Due to a bug in my PHP script, I have created multiple erroneous entries in my MongoDB. Specifically, I was using $addToSet and $each and under certain circumstances, the MongoDB object gets updated wrongly as below:\[code\]array ( '_id' => new MongoId("4fa4f815a6a54cedde000000"), 'poster' => '[email protected]', 'image' => array ( '0' => 'image1.jpg', '1' => 'image2.jpg', '2' => 'image3.png', '3' => array ( '$each' => NULL, ), ),\[/code\]You can see that "image.3" is different from the other array entries, and that was the incorrect entry. I have fixed the related in my PHP script, however I am having difficulties tracking down all the affected entries in MongoDB to remove such entries. Is there any way in MongoDB to check if any of the image array entry contains another array instead of string? Since the index of containing the sub-array is a variable, it would not be possible to perform a $type check on image.3 for every entry. Could use any suggestion. Thanks!