Ancestors

Toot

Written by John Hawthorn on 2024-08-29 at 17:38

def really_rand = [rand(2**64)].pack("Q").unpack1("D")

really_rand()

=> 2.0251516865267015e+83

really_rand()

=> -1.0005918537287168e-151

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Descendants

Written by Alex on 2024-08-29 at 17:42

@john cursed crypto. can you explain what’s going on there?

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Written by John Hawthorn on 2024-08-29 at 18:22

@akahn For testing I needed to generate random floating point numbers from -infinity to infinity (rand() just gives 0.0 to 1.0). This generates random 64 bit integers and then reinterprets their bytes as a double.

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