Geek: random numbers are hard...
I've discovered this the hard way (via subtle bugs) on a number of occasions over my career. The most recent time involved creating GUIDs. It wasn't my code, but it was
my job to find the problem – and it was caused by a random number generator producing a (very) biased stream of (allegedly randomly distributed) numbers. Here's someone else discovering a similar problem
, this time in C++.
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