Re: JESS: Get the current year

There's some math functions but no date functions. see    Jess71p2-1/docs/function_index.html
You can use java from Lisp to do this. 

(bind ?ms ((new java.util.Date) getTime))
(bind ?year (integer (+ 1970 (/ (/ (/ (/ (/ ?ms 1000) 3600) 24) 365.25 )))))
(printout t ?year crlf)

getTime() is deprecated. The proper way to get the time is from java.util.Calendar. 
 
int year = Calendar.getInstance().get(Calendar.YEAR);

But you have to use static methods. Jess doesn't appear to let you do this.


On Aug 24, 2010, at 12:08 PM, ANA TANASESCU wrote:

> Hello everybody,
> 
> I want to define a rule that makes the difference between the year of the current date and the year from a slot in my ontology.
> Is there a function that gets the current date or the year from the current date?
> 
> I am looking forward for your answer.
> Best regards,
> Ana
> 





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