how to validate a text field which can be A,B,C,D, Null, or groups of A,B,C,D (ex. ‘A,B,C’ with commas no space).

Question

how to validate a text field which can be A,B,C,D, Null, or groups of A,B,C,D (ex. &lsquo;A,B,C&rsquo; with commas no space).

Mike Schmitt · Accepted Answer

my quick suggestion: 
 a!localVariables(
 local!text,
 
 a!textField(
 value: local!text,
 saveInto: local!text,
 validations: {
 if(
 and(
 a!isNotNullOrEmpty(local!text),
 a!isNotNullOrEmpty(stripwith(local!text, "ABCD,"))
 ),
 "invalid characters entered",
 ""
 )
 }
 )
)

how to validate a text field which can be A,B,C,D, Null, or groups of A,B,C,D (ex. ‘A,B,C’ with commas no space).

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