Hello everybody!
Assume i have the following function:
(deffunction my_member (?val ?list)
"implementation for member-predicate in jess"
(
(printout t (length$ (list ?list) ))
;(foreach ?element ?tail (printout t ?element))
))
I tried to call the function using Jess70p1 like this:
1. (my_member 3 (list 1 2 3 4))
Result: (my_member 3 (list 1 2 3 4))
Jess reported an error in routine call
while executing (call (printout t (length$ (list ?list))))
while executing deffunction my_member
while executing (my_member 3 (list 1 2 3 4)).
Message: Not enough arguments . <= Hmm okey what function did ACTUALLY
fail? length$, list, printout?
Program text: ( my_member 3 ( list 1 2 3 4 ) ) at line 56.
2. (my_member 3 (1 2 3 4))
Jess reported an error in routine Jesp.parseFuncall.
Message: "1" is not a valid function name at token '1'.
Program text: ( my_member 3 ( 1 at line 57.
Jess> 2
Jess> 3
Jess> 4
Jess> Jess reported an error in routine Jesp.parseExpression.
Message: Expected a '(', constant, or global variable at token ')'.
Program text: ) at line 57.
Jess> Jess reported an error in routine Jesp.parseExpression.
Message: Expected a '(', constant, or global variable at token ')'.
Program text: ) at line 57.
Now my question is: How do i call a function with a list as parameter?
Regards,
Christoph
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