Package Exports
- xorshift.js
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Readme
#xorshift.js
Pseudorandom number generator using xorshift (xorshift128+ and xorshift1024*)
This package is based on xorshift [github] with fixed random and added randomBytes & XorShift1024Star.
Installation
npm install xorshift.jsExample
const xorshift = require('xorshift.js')
for (let i = 0; i < 10; i++) {
console.log(xorshift.random()) // number in range [0, 1)
}API
This module exports a default PRNG created from XorShift128Plus with seed that have been set from Date.now and Math.random.
XorShift128Plus(seed)
Construct xorshift128+ with specific seed.
const { XorShift128Plus } = require('xorshift.js')
const prng1 = new XorShift128Plus([1, 0, 2, 0])
const prng2 = new XorShift128Plus('000000010000000000000002')
assert(prng1.random() === prng2.random())XorShift1024Star(seed, p)
Construct xorshift1024* with specific seed (longer period, but slower).
const { XorShift128Plus } = require('xorshift.js')
const seed = [0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3]
const prng1 = new XorShift1024Star(seed, 1)
const prng2 = new XorShift1024Star(seed, 1)
assert(prng1.random() === prng2.random())randomInt64()
This method returns a random 64-bit integer represented as array with two 32-bit numbers.
const { XorShift128Plus } = require('xorshift.js')
const prng = new XorShift128Plus([1, 0, 2, 0])
console.log(prng.randomInt64()) // [8388677, 32896]random()
This method returns a floating-point, pseudo-random number in the range [0, 1). Like Math.ramdom.
const { XorShift128Plus } = require('xorshift.js')
const prng = new XorShift128Plus([1, 0, 2, 0])
console.log(prng.random()) // 0.0019531410653161885randomBytes(size)
Generates pseudo-random data. The size argument is a number indicating the number of bytes to generate.
const { XorShift128Plus } = require('xorshift.js')
const prng = new XorShift128Plus([1, 0, 2, 0])
console.log(prng.randomBytes(10).toString('hex')) // 00800045000080800200License
MIT