Method shuffle

src/ArrayUtil.js:102–111

* Orders array elements randomly using Fisher–Yates modern shuffle algorithm. * @param {array} array * @param {Random} [random] Random instance * @return {array} Shuffled array

(array, random = null)

   * @return {array} Shuffled array
   */
  static shuffle (array, random = null) {
    random = random || Random.getInstance()
    const a = array.slice()
    let i, j
    for (i = a.length - 1; i > 0; i--) {
      j = random.nextInteger(0, i)
      ;[a[i], a[j]] = [a[j], a[i]]
    }
    return a
  }

  /**
   * Chunks the given array into slices of equal length.