No that is not true.
: (setq "ABC" 3)
-> 3
: "ABC"
-> 3
: (setq "ABD" 2)
-> 2
: (> "ABC" "ABD")
-> T
But it is always true if the transient symbols do not refer to themselves.
See Comparing in the docs.
> Numbers are comparable by their numeric value, strings by their name, and
> lists recursively by their elements (if the CAR's are equal, their CDR's
> are
> compared). For differing types, the following rule applies: Numbers are
> less
> than symbols, and symbols are less than lists.
>
2017-04-01 14:04 GMT+02:00 Christopher Howard <
christopher.how...@qlfiles.net>:
> Additional question: Should I expect any weird behavior with transient
> symbols and the '< or '> operators? E.g. (assuming the symbols have not
> been assigned strange values) is it true that "abc" will always be less
> than "abd" regardless of the scope of the transient symbols?
>
> On 04/01/2017 03:56 AM, Christopher Howard wrote:
> > 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
> this
> >> 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
> second
> >> was a new, different, symbol.
> >>
> >> Either use '=' for comparison, or use only internal symbols as keys.
> >>
> >> ♪♫ Alex
> >>
> >
>
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