This is the first QotD in a long time (ever?) that, after getting it right, I audibly said "WOO-HOO!"... at work, in an open office area. So yeah, a few strange looks.
Thanks for the great question, I can't wait to get part 2 wrong! 😀
Ron (a different one)
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a haiku...
NULL is not zero
NULL is not an empty string
NULL is the unknown