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Is there a way to create an object with auto execute procedures? For example if a variable within this object has changed a private procedure kicks in and starts to do something?
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The language offers no such functionality. You have to implement it yourself.
Typically that's done by hiding the variable as a
private, or better astrict private, and then ensure that all access to the variable is routed through a property. Then you can take whatever action you need in the property setter method.