// Just use this within your controllers, don't forget to inject ArrayService into your controller!

// Locates elementWithinArray and deletes it, returns false on error.
ArrayService.deleteElement(myArray, elementWithinArray);

// Swaps elementWithinArray with element before it. Returns false on error.
ArrayService.moveElementUp(myArray, elementWithinArray);

// Swaps elementWithinArray with element after it. Returns false on error.
ArrayService.moveElementDown(myArray, elementWithinArray);