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On 11/23/06 10:49, Martijn van Oosterhout wrote:
> On Thu, Nov 23, 2006 at 10:23:55AM -0600, Ron Johnson wrote:
>> For those times when and that when numeric sequences *are* needed
>> (employee_id and account_number for example) they should include a
>> check digit, to ensure that you don't mis-type a number and charge
>> the wrong account.
>
> Sure, but the check digit does not need to be stored, as it can be
> regenerated on demand. The user interface just verifies the check
> digit, then throws it away.
$ SET GEEZER
$ WRITE SYS$OUTPUT "THAT'S JUST EXTRA CYCLES WASTED BY THE"
$ WRITE SYS$OUTPUT "CLIENT. BETTER TO USE THEM FOR SOME OTHER"
$ WRITE SYS$OUTPUT "MORE PRODUCTIVE PURPOSE."
$ SET NOGEEZER
That's the VAX/VMS in me oozing out. But seriously, regenerate it
on demand??? That's not how it works. This isn't a CRC or hash
function.
- --
Ron Johnson, Jr.
Jefferson LA USA
Is "common sense" really valid?
For example, it is "common sense" to white-power racists that
whites are superior to blacks, and that those with brown skins
are mud people.
However, that "common sense" is obviously wrong.
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