/**
 * Deterministic fast unsafe rand generator, returns [0,1]
 * Source https://stackoverflow.com/questions/521295/seeding-the-random-number-generator-in-javascript
 */
export function mulberry32(a: number) {
  return function () {
    let t = (a += 0x6d2b79f5);
    t = Math.imul(t ^ (t >>> 15), t | 1);
    t ^= t + Math.imul(t ^ (t >>> 7), t | 61);
    return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
  };
}