是否有可能在ColdFusion中取消定义变量？

Question

是否有可能在ColdFusion中取消定义变量？

例如,像这样:

<cfset myVar = "lsajflksd" />
<cfoutput>
  <p>myVar is Defined? #IsDefined("myVar")#</p> <!--- Prints YES --->
</cfoutput>
<cfset Undefine(myVar) /> <!--- Doesn't exist... --->
<cfoutput>
  <p>myVar is Defined? #IsDefined("myVar")#</p> <!--- I want it to print NO --->
</cfoutput>

Answer 1

<cfset StructDelete(Variables, "myVar") />

Variables 是大多数上下文中大多数变量的默认范围.