cfloop index output in function call

Question

I have a loop which I need to add in the index to a function call. How can I do this?

Here is what I tried but it fails

<cfloop index="i" from="1" to="#arrayLen(test)#">
    #session_ID & i &.getSessionCount()#
</cfloop>

The index of the loop should output so that each iteration of the loop the line would look like this:

#session_ID1.getSessionCount()#
#session_ID2.getSessionCount()#
#session_ID3.getSessionCount()#
#session_ID4.getSessionCount()#

and so on.

@Kevin B this seems to be giving me the correct output now: #evaluate("session_ID" & i).getSessionCount()# thank you i will go with this for now. — Jeepers Creepers
– Jeepers Creepers, Commented Jul 6, 2015 at 22:05
in the past i've used evaluate for things like this, but i read a post on here a while back about how you should avoid using it! if you check this page 'Avoiding the Evaluate function' help.adobe.com/en_US/ColdFusion/9.0/Developing/… it gives you alternatives — luke
– luke, Commented Jul 6, 2015 at 22:08
Using evaluate() is unnecessary here, and is generally considered poor practice in general. — Adam Cameron
– Adam Cameron, Commented Jul 6, 2015 at 22:10

Adam Cameron · Accepted Answer · 2015-07-06 22:09:57Z

9

If one needs to create a variable name dynamically, then use associative array notation rather than dot notation, and reference the variable via the scope that it's in. EG:

<cfloop index="i" from="1" to="#arrayLen(test)#">
    <cfset result = variables["session_ID" & i].getSessionCount()>
</cfloop>

answered Jul 6, 2015 at 22:09

Adam Cameron

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Jeepers Creepers Over a year ago

After so more reading and looking at Adam's example using the associative array notation i have gone with this. Thanks guys, i'm putting this down to learning something else new today.

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