Random-Utils.js

random-utils.js

Math.seed = function(s) {
  return function() {
    s = Math.sin(s) * 10000
    return s - Math.floor(s)
  }
}

/**
 * Get a random floating point number between `min` and `max`.
 *
 * @param {number} min - min number
 * @param {number} max - max number
 * @return {number} a random floating point number
 */
function getRandomFloat(min, max) {
  return Math.random() * (max - min) + min;
}

/**
 * Get a random integer between `min` and `max`.
 *
 * @param {number} min - min number
 * @param {number} max - max number
 * @return {number} a random integer
 */
function getRandomInt(min, max) {
  return Math.floor(Math.random() * (max - min + 1) + min);
}

/**
 * Get a random boolean value.
 *
 * @return {boolean} a random true/false
 */
function getRandomBool() {
  return Math.random() >= 0.5;
}

function setSeed(seed) {
  Math.random = Math.seed(seed)
}

module.exports = {
  getRandomInt,
  getRandomFloat,
  getRandomBool,
  setSeed
}