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A faster way to calculate the day-of-the-week (www.benjoffe.com)
submitted 2 months ago by to c/programming@programming.dev
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[–] 29 points 2 months ago* (1 child)

By the end, you will understand why this code above works.

I was utterly fooled. Looks cool though!

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  • [–] 2 points 2 months ago

    It assumes that you already know how modulus works under the hood, which I absolutely did not. The proof for how it's allowed is at the bottom which I would have read first if I'd have known.

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