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Signature RANDOM (pkg github.com/diku-dk/sml-random)

Operations for constructing pseudo-random numbers.

structure Random : RANDOM (pkg github.com/diku-dk/sml-random)

signature RANDOM = sig
  type generator

  val newgenseed : real -> generator
  val newgen     : unit -> generator
  val random     : generator -> real
  val randomlist : int * generator -> real list
  val range      : int * int -> generator -> int
  val rangelist  : int * int -> int * generator -> int list
end

[type generator]

Abstract type of random number generators, producing uniformly distributed pseudo-random numbers.

[newgenseed seed]

returns a random number generator with the given seed.

[newgen ()]

returns a random number generator, taking the seed from the system clock.

[random gen]

returns a random number in the interval [0..1).

[randomlist (n, gen)]

returns a list of n random numbers in the interval [0,1).

[range (min, max) gen]

returns an integral random number in the range [min, max). Raises Fail if min > max.

[rangelist (min, max) (n, gen)]

returns a list of n integral random numbers in the range [min, max). Raises Fail if min > max.