code: function quickRandom(length) {
      length = length || 16;
      var pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
  
      return str_shuffle(pool.repeat(5)).substr(0, length);
  }
docs: Generate a "random" alpha-numeric string.
  
  Should not be considered sufficient for cryptography, etc.
  
  @param  {number} [length]
  @return {string}