On Thursday, Jan 30, 2003, at 21:58 US/Pacific, Andy Ousterhout wrote:
> OK, I am hooked after only a few hours on CFC's. This is so much
> easier to
> code that what I was trying to do with modules & includes in 5.0....
:)
> For the sake of discussion, lets also say I have another component
> called
> Invoice that needs two Person objects, one for Ordering Person and
> another
> for Ship To person. I can't just use extends because that creates a
> single
> person instance. How do I code this?
"extends" represents an "is-a" relationship:
car "is-a" vehicle
so
<!--- car.cfc --->
<cfcomponent extends="vehicle">
...
</cfcomponent>
is a reasonable model.
"has-a" is modeled by 'containment' - having data members:
Invoice "has-a" Ordering Person
Invoice "has-a" ShipTo Person
so
<!--- invoice.cfc --->
<cfcomponent>
<cffunction name="create">
<cfargument name="shipto" type="person">
<cfargument name="orderer" type="person">
<cfset this.shipto = arguments.shipto>
<cfset this.orderer = arguments.orderer>
</cffunction>
</cfcomponent>
Hope that helps?
Sean A Corfield -- http://www.corfield.org/blog/
"If you're not annoying somebody, you're not really alive."
-- Margaret Atwood
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