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 FileMaker Pro Custom Functions

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cfGetEveryNthValue ( pList ; pStart ; pIncrement ; pInputSeparator ; pOutputSeparator )

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  Average rating: 4.2  (43 votes)
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Kevin Frank, Kevin Frank & Associates

Extract every Nth item from a list; allow starting value and list separators to be specified

Sample Input:
cfGetEveryNthValue ( "A~B~C~D~E~F" ; 2 ; 3 ; "~" ; "$" )
Sample Output:

 Then copy & paste into FileMaker Advanced's Edit Custom Function window.


Recently I needed to reduce a list to "every other" item in that list, i.e., the 1st item, the 3rd item, the 5th item, etc.

It occurred to me that in the future I might need, say, every third item rather than every other item, and that I might want to begin with something other than the first item on the list. It also occurred to me that I might want to specify a list separator other than a hard return, for either the input, the output, or both.

That's how this CF came to be.

Note: these functions are not guaranteed or supported by Please contact the individual developer with any questions or problems.

This is my Custom Function and I want to edit it


This worked perfectly for what I needed to do. Giant list of 2800 points to graph, more than necessary and more than WebDirect could handle in a graph. I was about to write my own function and came across this by chance for another project. Thanks for posting this!

David Nahodyl, Atlanta, GA
May 09, 2015 1:30pm

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