How to reindex array with negative integer key value, so that items 0,1,2,3,-1 sort to -1,0,1,2,3, and then renumbered to 0,1,2,3,4?
How to reindex array with negative integer key value, so that items 0,1,2,3,-1 sort to -1,0,1,2,3, and then renumbered to 0,1,2,3,4?

