On Mon, Oct 04, 2004 at 05:17:09PM +0900, nkb wrote:
> I've a table with about 10 fields. I would like to be able to sort 
> ascending or decendingly, based on any one of the fields. I was 
> wondering if there might an elegant way to do this in Ruby? In C, I do 
> it by keeping track of the index of the array and then assigning them 
> individually. Thanks!!!

Something like this?

   a = [
     [5,3,5,"foo"],
     [2,1,9,"bar"],
     [3,9,3,"baz"],
   ]
   a.sort { |x,y| x[3] <=> y[3] }    # sort on 4th element

You can get a reverse sort by

   a.sort { |x,y| y[3] <=> x[3] }

Regards,

Brian.