I haven't tested this at all but I think it may do what you need and I
think I have accounted for potential failure points. I approached it
slightly differently and replicated the typical string.mid functions
that exist - so you provide a start point and a count and from there
it gets to your desired end point.
<cffunction name="ArrayMid" returntype="array" output="false"
hint="returns a subsection of an array">
<cfargument name="inArray" type="array" required="true" />
<cfargument name="startPos" type="numeric" required="true" />
<cfargument name="count" type="numeric" required="false"
default="#ArrayLen(arguments.inArray) - arguments.startPos#" />
<cfset var outArray = ArrayNew() />
<cfset var i = 0 />
<cfset var maxPosition = arrayLen(arguments.inArray) />
<cfif MaxPosition>
<!--- make sure the startPosition is a positive integer --->
<cfif arguments.startPos LTE 0>
<cfset arguments.startPos = 1 />
</cfif>
<!--- make sure we aren't starting at too high of a position
--->
<cfif arguments.startPos GT maxPosition>
<cfset arguments.startPos = maxPosition />
</cfif>
<!--- make sure we won't go beyond the bounds of the array --->
<cfif arguments.count + arguments.startPos GT maxPosition>
<cfset arguments.count = ArrayLen(arguments.inArray) -
arguments.startPos />
</cfif>
<!--- get the "subArray" --->
<cfloop from="#arguments.startPos#" to="#arguments.startPos +
arguments.count#" index="i">
<cfset ArrayAppend(outArray,arguments.inArray(i)) />
</cfloop>
</cfif>
<cfreturn outArray />
</cffunction>
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