Package Exports
- xorshift.js
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Readme
#xorshift.js
Pseudorandom number generator using xorshift (xorshift128+ and xorshift1024*)
This package is a fork of xorshift with fixed random, added randomBytes and xorshift1024*.
Installation
npm install xorshift.jsExample
var xorshift = require('xorshift.js')
for (var 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.
var XorShift128Plus = require('xorshift.js').XorShift128Plus
var prng1 = new XorShift128Plus([1, 0, 2, 0])
var prng2 = new XorShift128Plus('000000010000000000000002')
assert(prng1.random() === prng2.random())XorShift1024Star(seed, p)
Construct xorshift1024* with specific seed (longer period, but slower).
var XorShift128Plus = require('xorshift.js').XorShift128Plus
var 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]
var prng1 = new XorShift1024Star(seed, 1)
var 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.
var xorshift = require('xorshift.js')
console.log(xorshift.randomInt64()) // [ 963369356, 63457019 ]random()
This method returns a floating-point, pseudo-random number in the range [0, 1). Like Math.ramdom.
var xorshift = require('xorshift.js')
console.log(xorshift.random()) // 0.3946640888604528randomBytes(size)
Generates pseudo-random data. The size argument is a number indicating the number of bytes to generate.
var xorshift = require('xorshift')
var buffer = xorshift.randomBytes(10)
console.log(buffer.toString('hex')) // 6fc7135516658ef9ce48License
MIT