I think Alexander Lamb wrote: > (OrmedContext > (readyToRun TRUE) > (task "script") > (selectedCompleterResponse ?r & :(eq "ASP" get ?r keyCode)) > (OBJECT ?x) ... > The problem is that my LHS never evaluates to true
Sure -- the call of "eq" is asking whether the string "ASP", the symbol "get", the contents of the variable "?r" and the symbol "keyCode" all have the same type ans value -- and of course, this will always return FALSE. You've left off the parentheses around the call to "get". So while this is syntactically correct, it's semantically nonsensical. > Now, last time you had Suggested I use the following format: > > (selectedCompleterResponse ?r & :(eq "ASP" (get ?r keyCode))) > > To match the value of the contained object (see the parenthesis around the > get). > Unfortunately, the engine tells me _unknown slot keyCode_. But keyCode does > exist in the selectedCompleterResponse > Class and the class is defined with a deffclass. Whether there is a defclass or not is irrelevant. Only one thing matters here: that ?r is a Java object that has a method named getKeyCode(). If it isn't, then you'll get an exception. If it is, then this will work. Now, since you're getting an error, and since you mention a defclass, it's possible that perhaps you haven't stored the actual Java object in the selectedCompleterResponse slot, but instead you put another jess.Fact object in there -- a shadow Fact which -refers- to an an object that has a getKeyCode method. (Only you know how the selectedCompleterResponse slot of the OrmedComplex fact was populated, or what the data type of the Java object is, as we haven't seen your whole application.) If you're storing a Fact in there, rather than the Java object, then you've got to use a Fact method to get the value you want -- i.e., something like ;; Assuming ?r holds a jess.Fact object with a "keyCode" slot (selectedCompleterResponse ?r&:(eq "ASP" (?r getSlotValue keyCode))) So you understand the difference? --------------------------------------------------------- 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 -------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use your own address!) List problems? Notify [EMAIL PROTECTED] --------------------------------------------------------------------
