Re: [rules-users] Need Syntax help for a string match
The rete view for the following two rules have identical structure: (One alpha node in
each)
rule "Test"
when
t : Thing( foo == "BAR" || == "BAS" );
then
System.out.println( "meh" );
end
rule "Test"
when
t : Thing( foo in("BAR","BAS") );
then
System.out.println( "meh" );
end
So I guess the "|| ==" conditions are combined into one node. I can't peek
into the source at the moment to check, though. And I don't know which is faster.
I'd guess that either is faster than regex for short lists, though.
--- On Tue, 11/17/09, Mauricio Salatino <salaboy(a)gmail.com> wrote:
From: Mauricio Salatino <salaboy(a)gmail.com>
Subject: Re: [rules-users] Need Syntax help for a string match
To: "Rules Users List" <rules-users(a)lists.jboss.org>
Date: Tuesday, November 17, 2009, 3:31 PM
@Greg
Using "in" is better that the multiple || ==
"18" ?
It has some relation with indexing?
With multiple "|| == " the RETE network will
generate one alpha node for each value right?
But for "in" I don't imagine how it works, I
also realize that it's not included in the official
docs.
On Tue, Nov 17, 2009 at 7:22 PM,
Jared Davis <sunray(a)davisprogramming.com>
wrote:
Here are two ways to write the
regular expression.
m : Customer( age matches
"(18|21|33|28|40|41)")
m : Customer( age matches
"(18|2[18]|33|4[01])")
Did you try
m : Customer( age in
("18","21","33","28","40","41"))
I don't know which solution is faster. I think that
would
be an interesting test.
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