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79 lines
1.7 KiB
Plaintext
79 lines
1.7 KiB
Plaintext
(defmodule Random
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(def a 69069.0)
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(hidden a)
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(private a)
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(def c 1.0)
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(hidden c)
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(private c)
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(def m 4294967296.0)
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(hidden m)
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(private m)
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(def s 19380110.0)
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(hidden s)
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(private s)
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(doc seed "seed resets the seed of the random number generator.")
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(defn seed []
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(set! s (Double.from-long (System.nanotime))))
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(doc seed-from "seed-from resets the seed of the random number generator to `new-seed`.")
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(defn seed-from [new-seed]
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(set! s new-seed))
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(doc random "random returns a float from 0 to 1.")
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(defn random []
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(do
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(set! s (mod (+ (* s a) c) m))
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(/ s m)))
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)
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(defmodule Int
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(defn random-between [lower upper]
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(let [diff (- upper lower)]
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(+ (Double.to-int (* (Double.from-int diff) (Random.random))) lower)))
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(defn random []
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(random-between 0 MAX))
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)
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(defmodule Float
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(defn random-between [lower upper]
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(let [diff (- upper lower)]
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(+ (Double.to-float (* (Double.from-float diff) (Random.random))) lower)))
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(defn random []
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(random-between 0.0f (from-int Int.MAX)))
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)
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(defmodule Long
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(defn random-between [lower upper]
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(let [diff (- upper lower)]
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(+ (Double.to-long (* (Double.from-long diff) (Random.random))) lower)))
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(defn random []
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(random-between 0l (from-int Int.MAX)))
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)
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(defmodule Double
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(defn random-between [lower upper]
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(let [diff (- upper lower)]
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(+ (* diff (Random.random)) lower)))
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(defn random []
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(random-between 0.0 (from-int Int.MAX)))
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)
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(defmodule Char
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(defn random []
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(Char.from-int (Int.random)))
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(defn random-between [a b]
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(Char.from-int (Int.random-between (Char.to-int a) (Char.to-int b))))
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)
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(defmodule String
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(defn random-sized [n]
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(from-chars &(Array.repeat n &Char.random)))
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)
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