Brian Dunning's FileMaker Custom Functions

AddRemove ( value ; content )

A custom function which allows simple addition or extraction of values from a list.

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Matt Petrowsky   Matt Petrowsky
ISO Productions, Inc.
http://www.filemakermagazine.com

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  Sample input:
AddRemove ( 4; "2¶3¶4¶5¶" )
  Sample output:
2
3
5

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

This function is a simple tool. It simply adds or removes a value from a return delimited list of values. The area where this is most useful is when working with portals and clicking a portal row to add or remove an ID value from a global field storing a multi-key value.

 

Comments

Willem-Jan   Willem-Jan, Hiversum
Jan 6, 2010
I have added the RightValues functions so you do not have to add an "¶" to the content parameter. To be sure the list closes with an enter.


Let (
[
content =RightValues ( ( content );ValueCount ( content ));
value_exists = PatternCount ( "¶" & content & "¶" ; "¶" & value & "¶" )
]
;
Case (

value_exists; MiddleValues ( Substitute ( "¶" & content; "¶" & value & "¶" ; "¶" ) ; 2 ; 1000000 );
content & value & "¶" )

)
 

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