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 FileMaker Pro Custom Functions

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InsertChar (inText ; insertChar ; atInterval ; outText)

Rate this function:  

  Average rating: 3.9  (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.

Click here to copy To Clip Manager if you have myFMbutler's Clip Manager installed


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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