Re: [drools-user] Doubts in Bound Variables

  Niyas,

  There is no difference I can see between the 2 rules. Only thing 
worth to mention is you can't have both simultaneously in your package 
because they have the same name, but I guess you have one or the other, 
right?

  Regarding the $, as Oana said, it is just a naming convention. We use 
it to make clear a variable is a rule bound variable. As you know, "$" 
is a valid java starting character for identifiers, so you can use a 
java variable named "$cust", the same way you can use another named "cust".

  []s
  Edson

Niyas wrote:

> Why in the second case it's not printing anything? I am not asked
> about usom valid identifiers....  pls see the below two rules..
>
> Is there any difference between the below two rules
>
> rule "Credti Accept"       
>     salience 10
>     when
>         cust:Customer(customerAge > 18)       
>     then
>         System.out.println("Credit Card Allowed For :: " 
> +cust.getCustomerName());
>         //retract(cust);
> end
>
>
>
>
> rule "Credti Accept"       
>     salience 10
>     when
>         $cust:Customer(customerAge > 18)       
>     then
>         System.out.println("Credit Card Allowed For :: " 
> +$cust.getCustomerName());
>         //retract(cust);
> end
>
> On 12/21/06, nicolae oana <oananicolae1981@xxxxxxxxx> wrote:
>
> > Hi Niyas,
> >
> > There is no difference between your two declarations emp and $emp . 
> > The sign
> > '$' is used as first letter in the name of a declaration just to
> > differentiate declarations from fields. You can used or not. It's your
> > choice. But I think it is appropriate to use it,  just to follow the 
> > drools
> > standards in writing the code.
> >
> > Best regards,
> >                  Oana.
> >
> > Niyas <niyasahmed@xxxxxxxxx> wrote: I am new to jBoss Rule - Drools 
> > and I am
> > hust going thru' the manual
> > and trying some examples using JBoss Rules IDE in Eclipse..
> >
> > I am having doubt in bound variable:
> >
> > what is the difference between emp: Employee and $emp:Employee (the $
> > sign)? give some example
> >
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--
Edson Tirelli
Software Engineer - JBoss Rules Core Developer
Office: +55 11 3124-6000
Mobile: +55 11 9218-4151
JBoss, a division of Red Hat @ www.jboss.com



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