Pseudo-random numbers/Splitmix64: Difference between revisions
→{{header|Ruby}}: Add Ruby
(→{{header|Haskell}}: added solution) |
(→{{header|Ruby}}: Add Ruby) |
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</pre>
=={{header|Ruby}}==
<lang ruby>class Splitmix64
MASK64 = (1 << 64) - 1
C1, C2, C3 = 0x9e3779b97f4a7c15, 0xbf58476d1ce4e5b9, 0x94d049bb133111eb
def initialize(seed = 0) = @state = seed & MASK64
def rand_i
z = @state = (@state + C1) & MASK64
z = ((z ^ (z >> 30)) * C2) & MASK64
z = ((z ^ (z >> 27)) * C3) & MASK64
(z ^ (z >> 31)) & MASK64
end
def rand_f = rand_i.fdiv(1<<64)
end
rand_gen = Splitmix64.new(1234567)
5.times{ puts rand_gen.rand_i }
rand_gen = Splitmix64.new(987654321)
p 100_000.times.lazy.map{(rand_gen.rand_f * 5).floor}.tally.sort.to_h
</lang>
{{out}}
<pre>6457827717110365317
3203168211198807973
9817491932198370423
4593380528125082431
16408922859458223821
{0=>20027, 1=>19892, 2=>20073, 3=>19978, 4=>20030}
</pre>
=={{header|Sidef}}==
{{trans|Perl}}
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