Comparison of StructKeyExists vs IsDefined for determining if a multi-level sub-key exists.

StructKeyExists_vs_isDefined.cfm

<!---
  4/4/2019 Comparison of StructKeyExists vs IsDefined for determining if a multi-level sub-key exists.
  https://gist.github.com/JamoCA/5b20fe32da06d783f6d8636abb92f0f8
  Response to this: https://forums.adobe.com/message/11012233#11012233
  Try it here: https://www.trycf.com/gist/5b20fe32da06d783f6d8636abb92f0f8
--->

<cfset Test = {
    House = {
        Address = {
            Shipping = 1
        }
    }
}>

<cfoutput>    
<h2>StructKeyExists(Test,'House.Address.Shipping')</h2>
#StructKeyExists(Test,'House.Address.Shipping')#

<h2>isDefined('Test.House.Address.Shipping')</h2>
#isDefined('Test.House.Address.Shipping')#
</cfoutput>