Jess has been able to handle null properties for a long time; 6.1p8 can handle them, as can the current versions. What problem are you having, exactly?

On Aug 2, 2007, at 2:19 PM, Skeptic 2000 wrote:


Hi,

I need to add in the working memory some shadow facts with properties whose values are null. Currently, my workaround is to use a "NullObject" to prevent Jess from crashing upon finding a null value.

Is it the recommended way to do it ?

JFL

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