Every slot always has a default value. Slots aren't like entries in a
map, that either exist or not; slots are like member variables in a
Java class: they always have some value associated with them. If you
have slots you want to store numbers in, then set the default to a
number like new Value(0, RU.INTEGER).
On Oct 2, 2010, at 7:13 PM, Santiago Almirón wrote:
Hello,
First, excuse me for my English. My native languaje is Spanish.
I am writing to you because I have a little problem with Jess's API,
especially with addSlot from Class Deftemplate. I do not know how I
add a new slot without any default value. The main problem is with
FLOAT and INTEGER types. Because, some Facts which I work do not
have this slot instanced. If a give a default value, some rules will
be fired . I usually add SYMBOL slots in this way:
addSlot("Name", Funcall.NIL, "SYMBOL");
And then, when I assert a new Fact, a (Name nil) appears if I do not
give any value. SYMBOL type is not a problem, but FLOAT and INTEGER
types is a problem for me.
I appreciate your time. Thanks in advance.
Best regards
Santiago
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Ernest Friedman-Hill
Informatics & Decision Sciences, Sandia National Laboratories
PO Box 969, MS 9012, Livermore, CA 94550
http://www.jessrules.com
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