Re: general purpose array_sort

Hi,

> I can accept this outcome though an optional three-valued boolean sort order (ascending and descending only) I'd
argueis worth keeping.  null value placement too I guess, three-valued boolean (nulls_first).
 

Perhaps these optional arguments deserve separate discussions. I
suggest merging something everyone agrees on first. This will simplify
the review process and allow us to deliver value to the users quickly.
Arguments like `reverse => true` and `nulls_first => true` can always
be implemented and added as separate patches.

-- 
Best regards,
Aleksander Alekseev