I would do that. But the problem is I want to test if [there exists a fact of the form (available-part (name X)) for all X inside the list]. That's why the solution you offered would not work, since I just want to test instead of adding new facts.
Thanks for your response and I hope I could express myself clearer this time. Best regards, Levent On Tue, Jul 28, 2009 at 4:27 PM, Nick Tinnemeier <n...@cs.uu.nl> wrote: > Dear Levent, > > You are using a function (foreach) at the LHS of a rule. See > http://www.jessrules.com/FAQ.shtml#Q17 for an explanation on why this is > not good practice. > Try putting the foreach loop on the RHS of the rule, and most likely things > will work as expected. > > (defrule BuildPlanForward > (depends-on (parent ?a) (children ?list)) > => > (foreach ?c ?list (assert (available-part (name ?a)))) > > - Nick. > > > levent kent wrote: > > Hi everybody, >> >> I am doing my masters thesis and have a problem with lists. >> It is actually very simple. >> >> I want to create a rule which says: >> If all subtasks of a parent task are completed, then the parent task can >> be completed too. >> >> I tried the code below, but it seems that I can not use "foreach" at LHS >> of a rule. >> >> (defrule BuildPlanForward >> (depends-on (parent ?a) (children ?list)) >> (foreach ?c ?list (available-part (name ?c))) >> => >> (assert (available-part (name ?a))) >> ) >> >> How could I write such a rule in Jess? >> >> Thanks, >> >> -- >> Levent Kent >> > > > > > -------------------------------------------------------------------- > To unsubscribe, send the words 'unsubscribe jess-users y...@address.com' > in the BODY of a message to majord...@sandia.gov, NOT to the list > (use your own address!) List problems? Notify owner-jess-us...@sandia.gov. > -------------------------------------------------------------------- > > -- Levent Kent
