ShowLastDigits ( MyNumber ; HowMany )

Return a specified number of readable digits from an account, credit card number or other string of numbers, with the rest of digits being hidden (concealed).

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Lazarus Sismanis - Show more from this author
Decision Group
http://www.decisiongroup.net

Sample input:

ShowLastDigits ( "1111-2233-0000-8899" ; "4")

Sample output:

••••••••••••8899

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

/**
* =====================================
*	ShowLastDigits (  MyNumber ; HowMany )
*
* PURPOSE:
*	Return a specified number of readable digits from an account, credit card number or other string of numbers - 
*	with the rest of digits being hidden (concealed).
* 
* RETURNS: 
*	(string) text
*
* PARAMETERS:
*	MyNumber = Account or credit card number (or some other number).
*	HowMany = The number of digits that will remain readable.
*
* EXAMPLE: 
* 	ShowLastDigits ( "1111-2233-0000-8899" ; "4") = ••••••••••••8899
*
* DEPENDENCIES:
*	none
*	
* HISTORY:
*	CREATED: 2023-10-06: by Lazarus Sismanis ( Decision Group [ decisiongroup.net ] )
* =====================================
*/

Let ( 
[
	~number = MyNumber;
	~showLast = HowMany ;
	~filtered = Filter ( ~number ; "0123456789" ) ;
	~lastCharacters = Right ( ~filtered ; ~showLast ) ;
	~hidden = Left ( ~filtered ; Length ( ~filtered ) - ~showLast ) ;
	~hidden  = Substitute ( 

					~hidden  ; 

					["0" ; "•" ] ;
					["1" ; "•" ] ;
					["2" ; "•" ] ;
					["3" ; "•" ] ;
					["4" ; "•" ] ;
					["5" ; "•" ] ;
					["6" ; "•" ] ;
					["7" ; "•" ] ;
					["8" ; "•" ] ;
					["9" ; "•" ] 


 )


];

~hidden & ~lastCharacters


 )

Return a specified number of readable digits from an account, credit card number or other string of numbers, with the rest of digits being hidden (concealed).

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ShowLastDigits ( MyNumber ; HowMany )

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