Method isUnique

src/ArrayUtil.js:82–85

* Checks if an array only contains unique values (no duplicates). * @param {array} array * @return {boolean} True, if array only contains unique values.

(array)

   * @return {boolean} True, if array only contains unique values.
   */
  static isUnique (array) {
    return array.findIndex((element, index) =>
      array.indexOf(element) !== index) === -1
  }

  /**
   * Removes duplicate values from an array.