* Joseph Wright <[log in to unmask]> [2012-02-08 21:22:23 +0000]:

Hi Joseph,

: The \prg_quicksort: family of functions have been deprecated, and will
: be removed from l3kernel on or before 2012-05-31.
: 
: Non-expandable but clearer functions are available in the experimental
: l3sorrt, recently added to the LaTeX3 CTAN bundle.

I'm attaching a clear and (unless I'm missing something) an expandable
version of quicksort.

I started implementing it when I saw your email. It was good fun.
The actual definition takes 24 lines. The implementation is not
stable. Please feel free to use/adapt/bin/etc.

Regards,


Marc van Dongen