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 FileMaker Pro Custom Functions

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SubtractValues ( list ; list2 )

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  Average rating: 4.6  (29 votes)
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Jonathan Stark, Jonathan Stark Consulting

This functions subtracts list2 from list1, where both lists are in the format returned by the ValueListItems design function.

Sample Input:
list1 = "1¶2¶3¶4¶5¶6¶7"
list2 = "7¶2¶4"
Sample Output:
list3 = "¶¶¶1¶3¶5¶6"

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


This functions subtracts list2 from list1, where both lists are in the format returned by the ValueListItems design function. It is the reverse of the built-in filterValues function. SubtractValues is useful for displaying the unselected members of list in a portal.

Note: I didn't bother trimming the leading return from the result because I was using it as a multikey for portal filtering.

There are a couple of other custom functions on Brian's site that are similar, but I think it is helpful to see all different ways to skin the cat. This page is a nice resource, by the way - kudos Dunning!

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


Thanks Jonathon.

Vaughan, Sydney, Australia
June 23, 2011 2:53am

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