- #VISUAL PROLOG VS PROLOG HOW TO#
- #VISUAL PROLOG VS PROLOG UPDATE#
- #VISUAL PROLOG VS PROLOG CODE#
- #VISUAL PROLOG VS PROLOG PLUS#
In this example you can see that I didn't define the mother? predicates. Prolog.r offer also another facility which is very simple but quiet difficult to explain. repeat fails after N time successfull (usefull for loop) Like with ADD, you can do multiplication but also division (mult return with Y set to 4] With ADD you can do addition but also substraction (add return with Y set to 2) įree succeeds when X has no value, in other words, when X is noneīound succeeds when X has a value, in other words, when X is not none.Īdd succeeds when X + Y equals Z. If you want to test REBOL script, place it within parenthesis, example if. If succeeds when the value is not none or false. Not-equal? fails when X can be unified with Y Prolog.r offers a set of predefined predicates:Įqual? succeeds when X can be unified with Y All others predifefined predicates are standard predicates. CUT and FAIL are the only programed predicates. The CUT is available (CUT or !) and also the FAIL.
![visual prolog vs prolog visual prolog vs prolog](https://d22blwhp6neszm.cloudfront.net/30/297282/Tut01_projectWindow3.png)
Variables are word that begins with an uppercase letter or an underscore (_). This can be usefull to organize your knowledge base, frequently one base for the rules (your logic) one base for the facts (the knowleddge base) and one base for the case (the deduction donefor the applied case).Įxcept these differences, the Prolog syntax is respected. To access to the clauses from one base to another, you must use path, for example : facts: assert none [ The last difference, is that you can organize your knowledge into many base.
#VISUAL PROLOG VS PROLOG PLUS#
Will give back the third parameter when you give only two or check that the first plus the second equal the third when you give the three parameters. You can also place REBOL script within the parameters of a predicate.
![visual prolog vs prolog visual prolog vs prolog](https://image.slidesharecdn.com/introductiontoprologfinal-131007230123-phpapp02/95/introduction-to-prolog-28-638.jpg)
For example, to print out some information, you can do this : grandfather [
#VISUAL PROLOG VS PROLOG CODE#
This is simply because it's more simple to parse and manipulate block than strings in REBOL and also, because when you load your script, REBOL check missing brackets if any.Īn other difference is that you can place REBOL code within your clauses. Is in the prolog.r dialect : grandfather [ An other difference is that the body of the predicates is placed within a block.įor example, the (Turbo) Prolog : grandfather (X, Y) :. The main difference is that the prolog.r dialect use block instead of parenthesis (). Goals - The goals to try (Type: block) 1.2 Differences between Prolog syntax and prolog.r dialect Try a goal n times and return the time to do it Word - The word or block of word to set for each solutions (will be local) (Type: word block)īody - The block to evaluates for each solutions (Type: block) Try a goal and execute the body for each solutions Goals - The goals to try (Type: block) 1.1.4 for-which USAGE: Try a goal and return the number of solution NB: This is not very well tested up to now. Retract removes all clauses for which the head of the clause can be matched with the predicate. Predicat - The predicate to retract (Type: block) Perhaps, it will be usefull to have a /head refinement to insert it instead of append it.
![visual prolog vs prolog visual prolog vs prolog](https://wiki.visual-prolog.com/images/8/80/Fundamental_Prolog_2_fig1.png)
The clause are always appended to the knowledge base. If you want to add clauses to a knowledge base, give the base into which the clauses must be added. If you want to create a new knowledge base, give none for the base parameter. Return the KB block.īase - KB block or none for a new base (Type: block none)Ĭlauses - Clauses block to be parsed (Type: block)
#VISUAL PROLOG VS PROLOG UPDATE#
Which allows you to bench your predicatesĬreate or update a KB block with parsed clauses. Which allows you to execute a block of REBOL code for each goal solution Which allows you to retract clauses from a knowledge base Which allows you to assert clauses into a knowledge base The engine provide the following interface :
![visual prolog vs prolog visual prolog vs prolog](https://cdn-images-1.medium.com/max/1600/1*ED3WDm5MGQ_0QZeWE3gw0Q.png)
#VISUAL PROLOG VS PROLOG HOW TO#
2.3 How to optimize the cutting of a bar in many pieces