Filtering array values

order_by

See the docs

Order_by ? oO

My rows are like :

Code:

id
...
slide1
slide2
slide3
slide4
slide5
slide6
slide7
slide8

In my view I'm using first slide to show it in a list of results so if slide1 is empty I want to get the next slide AND also to make a slideshow on a specific result, I need to filter empty slides...
I don't think "order_by" can do the job but array_filter() can do it
No ?