Deadbeef Pseudo-Random Number Generator

A seed-able pseudo-random number generator (PRNG), ported from the public domain work by Robbert Haarman into JavaScript.

Introduction

The deadbeef random number generator is a simple pseudorandom number generator (PRNG) that generates 32-bit pseudorandom numbers, with heavy use of the constant 0xdeadbeef. It's simple enough that one can learn the code by heart, and implement it whenever a simple PRNG is needed. The generator is fast and does well on a number of tests [Robbert has] put it through, but [Robbert] make[s] no claims about the suitability of the generated numbers for any purpose. [...]

Installation

yarn add deadbeef-rand
# or npm install deadbeef-rand

Usage

DeadbeefRand is written in a UMD pattern and so can be used in both Node and Browser environments.

Node

import DeadbeefRand from 'deadbeef-rand';
/* Or in a CJS environment: */
// const DeadbeefRand = require('deadbeef-rand');

// Seed it with some value.
let deadbeef = new DeadbeefRand(4);

// Generate a pseudo-random number.
let n = deadbeef.rand();

Browser

<script src="https://unpkg.com/deadbeef-rand@1.0.0/index.js" integrity="sha384-+M7ady7SKCjKupbm8bWdNxz/FoEDVFh1rJ3M5FatKgGNb+cW+Z8uy9tpmv15XFsv" crossorigin="anonymous"></script>
<script>
  var deadbeef = new DeadbeefRand(4);
  var n = deadbeef.rand();
</script>

API

constructor(seed)

Initialize your DeadbeefRand instance with a seeded value. Defaults to 0.

rand()

Returns a random 32-bit integer.

License

Zero-Clause BSD