Thank you for your answer,
however, your solution is useful for sorting only the values of one
slot. My problem is printing all the facts (with all the slot values)
sorted by means of the values of one (or two) slots. For example, these
facts:
(deffacts data
(person (firstName Fred)
On Aug 6, 2007, at 8:09 AM, Joaquín Cañadas wrote:
Thank you for your answer,
however, your solution is useful for sorting only the values of one
slot.
Collections.sort() can sort data however you'd like -- you just have
to write a Comparator.
- I can not access to the facts returned by
Ok ! I have done it.
Thank you for your help.
Joaquín
Ernest Friedman-Hill escribió:
On Aug 6, 2007, at 8:09 AM, Joaquín Cañadas wrote:
Thank you for your answer,
however, your solution is useful for sorting only the values of one
slot.
Collections.sort() can sort data however you'd
Thank you Bob for your quick and useful answer! It was simpler than I
was trying (without success).
I have another related question, I hope not to abuse ;). How can we
modify the print function for printing names sorted alphabetically? In
the Jess in Action book an example rule called
As a Jess 7.0p1 query:
(defquery unique-first-name
A query for unique first names among person facts
?person - (person (firstName ?firstName))
(not (and ?earlier-person - (person (firstName ?firstName))
(test ( ?earlier-person ?person)
(deffunction
Two solutions.
(A) You define a query:
(defquery personQuery
(person (firstName ?fn)(lastName ?ln)(age ?age)))
The Jess function values-of runs the query and processes the result,
collecting the values of the result component with the name given as the
function argument name into the list
Instead of imnmediately printing the results below, add them to a
java.util.List, and sort the list; then you can print them in order.
So, for example
(import java.util.*)
(deffunction print-unique-first-names ()
print unique first names from person facts
(bind ?results (run-query*
Hello,
I need some help with queries. How can I query the distinct values of a
slot?
The manual explains how to select facts with a concrete value in an
slot. But my problem is different, for example, with these facts:
*Jess *(deffacts data
(person (firstName Fred) (lastName Smith)(age
