This is a utility library containing a small collection of stateless random number generators for use in Scala.

Supported algorithms:

• splitmix64
• xoshiro256**
• linear congruential generators
  • rand48

Individual algorithms implement the RNG trait and the value generators are modeled as state transition functions of the form RNG => (RNG, A). The Rand object defines the state transition functions and adds the methods map(), ap(), and flatMap() to the functions.

Example usage:

import green.thisfieldwas.random.Rand._
import green.thisfieldwas.random.Xoshiro256ss

val intAndDoubleRand = for {
  x <- nextInt(255)
  y <- nextDouble()
} yield (x, y)

val seed = 42
val (_, (i, d)) = intAndDoubleRand(Xoshiro256ss(seed))
println(s"Int = $i")
println(s"Double = $i")