I think Alexander Lamb wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
> I am not sure yet if this function should be in the rules or not, but here
> is something which is not accepted by the rule engine:
>
> (defrule completerRule1
> (Session (readyToRun TRUE) (currentCompleterQuestion ?q) (OBJECT ?x))
> (test (> (str-index ("ASP" ?q)) -1)
What's happening on this line -- why the parentheses around
str-index's arguments? You're probably getting an error message here
like
Message: Bad functor .
Program text: ( str-index ( "ASP" at line XXX
meaning that "ASP" isn't a function name, but the parentheses look
like a function call. In Jess, there are no parentheses around the
arguments to a function. Omit the extra parentheses, and this should
be fine. Note, though, that str-index returns FALSE, not -1, on no
match, so you really want just
(test (numberp (str-index "ASP" ?q)))
or even
(test (str-index "ASP" ?q))
(since anything but FALSE is true.)
> Now, this does not work. In the documentation, it says the parameters to
> str-index need to be ATOMS. But how? I am getting a string from my Java
> object!
The documentation is wrong; I have just updated it. Thanks for
pointing this out.
The function (sym-cat) can be used to convert a string to an atom:
(sym-cat "ABC") is the atom ABC.
---------------------------------------------------------
Ernest Friedman-Hill
Distributed Systems Research Phone: (925) 294-2154
Sandia National Labs FAX: (925) 294-2234
Org. 8920, MS 9012 [EMAIL PROTECTED]
PO Box 969 http://herzberg.ca.sandia.gov
Livermore, CA 94550
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