How to Convert a String of Integers into an Array of Byte

~~~~~~~~~~~~~~~~~~~~~~~~~
interface
uses
   ...
type
   //dynamic array type for Array of Byte
   TByteArr = array of byte;

   ...
implementation

function ArrOfByte(AStr: String): TByteArr;
var
   j: integer;
begin
   SetLength( Result, Length(AStr)) ;
   for j := 0 to Length(AStr) - 1 do
     Result[j] := ord(AStr[j + 1]) - 48;
end;
~~~~~~~~~~~~~~~~~~~~~~~~~

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