How do you test if an index in an Array is defined

Wed, 12 Apr 2000 02:48:27 -0700 

I am setting the index based on the first Integer value of a query

<cfoutput>
        <cfloop query="Query">
                <cfset SESSION.AnArray[#Value1#][1] = #Value1# >
                <cfset SESSION.AnArray[#Value1#][2] = #Value2# >
                <cfset SESSION.AnArray[#Value1#][3] = #Value3# >
                <cfset SESSION.AnArray[#Value1#][4] = #Value4# >
                <cfset SESSION.AnArray[#Value1#][5] = #Value5#>
        </cfloop>
</cfoutput>

I then wish to test for the existence of a specifc index

#SESSION.AnArray[2]#

TIA

Marc
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