Will,
Why do you reference variables.cart in your function? It'd be more of
a best practice to pass GetCartTotal the cart in question, like so:
<cffunction name="GetCartTotal" access="public" returntype="numeric"
output="true" hint="Show total of cart in dollars">
<cfargument name="cart" required="true" type="struct" hint="I am the
cart to total">
<cfset var cartTotal = 0>
<!--- Don't forget implicity created variables need declaration too! --->
<cfset thismerchID = "">
<cfloop collection="#arguments.cart#" item="thismerchID">
<cfset cartTotal = cartTotal + arguments.cart[thismerchID]["subtotal"]>
</cfloop>
<cfreturn cartTotal>
</cffunction>
Then, in your calling code, do:
GetCartTotal(variables.cart) instead of GetCartTotal()
-Joe
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