This thread reminds me to ask if are there any guarantees for ordering
of variant types?  Although the implementation indicates that with

  type card = Number of int | Jack | Queen | King | Ace

Jack < Queen and Queen < King it also says that Ace < Number 0.  I can
see what is going on with the implementation.  I'm curious if there
are any ordering guarantees that I can take advantage of?  Since the
documentation is silent on this point I doubt it.

Oh, It does seems as if tuples, arrays and lists are always compared
"from left to right".  This can be handy when sorting multi-
dimensional data.  This seems like a "more natural" ordering than for
variants but, once again, can this ordering be guaranteed for all
ocaml programs?

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