Brian Dunning's FileMaker Custom Functions

util.MaxLengthInList ( value_list )

Returns the longest length of the item in the value list.

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Pip Meadway   Pip Meadway - Show more from this author

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  Sample input:
$max_length = util.MaxLengthInList ( List ( "Aaaaaa" ; "bbbbbbbbbbbb" ; "cc" ; "2344" ))
  Sample output:
12 // The length of "bbbbbbbbbbbb"

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

This function uses a While loop (only available in FMP18 and above) to calculate the maximum length of an item in a value list.

It will also coincidentally return the length of an individual string, a number implicitly converted to a string, and the length of the filename in a container, such is the forgiving nature of Filemaker.

As this is my first submission, some explanation on my naming standard:

Almost all my custom functions begin with a 'grouping' e.g. this function is a utility function, so it starts with 'util.' I also have 'debug.' and 'iter.' custom functions.

If it's a PRIVATE function (only to be called by other functions) , rather than PUBLIC (can be called from a script), it starts with '~group' e.g. '~util.'

Of course, feel free to rename as you see fit!



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