Brian Dunning's FileMaker Custom Functions

ApplyToList ( ListA ; function, separator )

Apply FUNCTION to each item in list

  Average rating: 4.2 (40 votes) Log in to vote

Bruce Robertson   Bruce Robertson - Show more from this author

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  Sample input:
applyToList( list( invoiceItems::ProductID); "[n]"; ", " )
applyToList( list( invoiceItems::amount); "[n]"; "+" )
  Sample output:
XL123, SM234, P0001


  Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

Given a list, apply a function to each item in the list and return the results separated by separator. Rather than walking a range from N1 to N2, this merely walks a list of supplied values. This is a recursive function. The range functions are great but sometimes you need to work with a list.

Use [n] notation to identify item in list.

applyToList( $$array ; "Case( Left( [n] ; 1)=1; [n])"; ", " )
1 Adak, 10 Anchor Point, 11 Anchorage, 12 Anchorage, 13 Anchorage, 14 Anchorage, 15 Anchorage, 16 Anchorage, 17 Anchorage, 18 Anchorage, 19 Anchorage



Dan Shockley   Dan Shockley
Apr 11, 2013
I noticed this function and the one by Debi Fuchs (found at ) have the exact same name, but the first two parameters are in reverse order compared to each other. That could lead to some serious confusion. Also, the function by Debi Fuchs handles potential errors much more thoroughly.

Just a heads-up to anyone looking at these functions.
Bruce Robertson   Bruce Robertson
Apr 11, 2013
Thanks. Looks like she went further with a more robust implementation of the idea.

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