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 FileMaker Pro Custom Functions

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InsertChar (inText ; insertChar ; atInterval ; outText)

Rate this function:  

  Average rating: 3.8  (46 votes)
  Discuss this Custom Function

Michael Rauch, ShopWorks

Insert character at regular intervals within text

Sample Input:
InsertChar ( TO::GeneSeq ; " " ; 4 ; "")
where the field TO::GeneSeq contains "ATTTCTTTTTTTCCTCTTTC"
Sample Output:

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


Tail recursive custom function that inserts the specified character at the specified interval.

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


Yout formula ruins my file!!!!! got into a loop can't get rid of it

Brian, Mexico
March 14, 2015 1:22pm

- Uses a parameter name that is the same as the function name. FileMaker 13 complains about this.
- atInterval is not checked for zero or negative values
- otherwise function runs fine

mbraendle, Zurich
August 06, 2015 11:34pm

Worked fine for me I altered the function first:
1. renamed to 'InsertCharacter'
2. slight code change:

addText = Left ( inText ; atInterval);
nextText = Right ( inText ; Length ( inText ) - atInterval );
outText = outText & Case ( Length ( outText ) > 0 ; insertChar ) & addText
Case ( Length ( nextText ) > 0 ; InsertCharacter ( nextText ; insertChar ; atInterval ; outText ) ; outText)

Don't care much for the outText-feature but I'm not complaining !
Thnx again, real time saver !

Cheers, Arjen van der Ree

Arjen van der Ree, Amsterdam
October 26, 2015 6:43am

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