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Government cracks down on spam calls – here’s how to opt out

Registry will be rolled out in two phases, with marketers given until April 2027 to cleanse their databases.

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A fair Secret Santa draw with exclusions is a matching problem

A Secret Santa draw looks like a shuffle. It stops being one the moment someone says "Ana and Ben are a couple, they can't draw each other" and "nobody gets the same person as last year".

  • Secret Santa draw involves assigning recipients with exclusions
  • Valid draw is a permutation with no fixed points (derangement)
  • Uniform random selection uses backtracking with valid draws

I measured whether .NET Guid sorting is broken. It isn't.

" Guid sorting in .NET is weird" is a claim you run into often enough that I wanted a number for it. So I measured CompareTo directly. It sorts in logical value order.

  • Guid.CompareTo sorts in logical value order, disproving claim of broken sorting
  • ToByteArray() reveals .NET stores first three Guid groups in little-endian
  • CompareTo order differs from raw byte order, clarifying layout confusion

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