RosettaCodeData/Task/Linear-congruential-generator/Jq/linear-congruential-generator-1.jq
2023-07-01 13:44:08 -04:00

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# 15-bit integers generated using the same formula as rand()
# from the Microsoft C Runtime.
# Input: [ count, state, rand ]
def next_rand_Microsoft:
.[0] as $count | .[1] as $state
| ( (214013 * $state) + 2531011) % 2147483648 # mod 2^31
| [$count+1 , ., (. / 65536 | floor) ];
# Generate the first n pseudo-random numbers:
def rand_Microsoft(seed; n):
[0,seed]
| next_rand_Microsoft # the seed is not so random
| recurse(if .[0] < n then next_rand_Microsoft else empty end)
| .[2];