Re: Multi-Sort -- how to do this?

On Wed, 2009-06-17 at 22:54 +0100, Douglas Temple wrote: > ...Sticking my neck out playing with the big boys (and girls) now... > > I assume you've looked at array_multisort() for this, I would think you > could have multiple arrays being sorted with it (I've only ever used it for > 2-array sorts). The other option would be to pop all those arrays into a > single array and use array_multisort()'s ability to sort > arrays-within-arrays. > > Otherwise Ashley's solution is another possibility; using the keys in the > sorted $d to dictate where you could place the elements in the other arrays. > I'd say you could do a nifty loop system which says sequentially read the > indices in $d and then make a new temp array that is $a, $b or $c (depending > on which you are sorting) in the sorted order then just name the temp array > as the original (again, I'd say array_multisort() is fancier than this crude > but elegant system). > > Finally, why not use quicksort or mergesort for the sorting? Bubblesort is > inefficient for large lists... I only mention using a bubblesort as it is the only sorting algorithm i know! Thanks Ash www.ashleysheridan.co.uk