I expect my code so far will hardly impress you, but you can view it here at
When the game is (mostly) complete I'll probably fork it out to a
On 04/01/2017 04:11 AM, Joh-Tob Schäg wrote:
> @Christopher Howard,
> I would be interested in seeing the source code for your text adventure
> RPG as i am working on a MOO (MUD (Multi user Dungeon) Object Oriented).
> You may not want to rebalance after every insert. But you can balance a
> 'idx by 'balance . You can always benchmark these combinations it your
> approach is faster the mailing list would be interested in your results
> and the source.
> 2017-04-01 13:56 GMT+02:00 Christopher Howard
> <christopher.how...@qlfiles.net <mailto:christopher.how...@qlfiles.net>>:
> Ah, okay. Somehow in my mind I had reversed the meaning of "==" and "=".
> @Joh-Tob: I am writing a text-adventure game, using a balanced binary
> tree as the primary data structure for managing game data. I wrote my
> own AA Tree implementation (with guidance from Wikipedia). I see the idx
> and balance functions in PicoLisp reference, but my concern is I don't
> see how you do with those an (efficient) self-balance after single
> inserts to an existing tree, nor how to do self-balancing deletes from
> an existing tree.
> On 04/01/2017 01:46 AM, Alexander Burger wrote:
> > Hi Christopher,
> >> : (aa-search '(("threshold" (("long-description" "You stand in front of
> >> a wooden door, reputed to be the home of one Dr. Theobold. The door has
> >> a small keyhole.") NIL NIL 1)) NIL NIL 1) "threshold")
> >> -> ("threshold" ...
> >> However, if I run this command, I get a different result:
> >> : (aa-search (rooms) "threshold")
> >> ...
> > The problem is the '==' in
> >> (if (== Key (car (aa-kv Tree)))
> > You pass a transient symbol "threshold", and '==' checks for exactly
> > symbol. The scope of transient symbols is per file or REPL instance, so
> you ran
> > the first test probably in the same instance, while "threshold" in the
> > was a new, different, symbol.
> > Either use '=' for comparison, or use only internal symbols as keys.
> > ♪♫ Alex
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