Why to never use sentinal values
Or, why null has a special meaning.
it's funny ...
Same thing happened to a guy in California a few years ago. Tried to be clever, and started getting tickets from around the state.
I think I'm going to get a personalized license plate that just says "NULL".
This is hilarious. It is an excellent example of why you hobbyist programmers drawing a salary ought to learn how to use null.
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