code: function randomString (length) {
      length = length || 6;
  
      var result = [],
          i;
  
      for (i = 0; i < length; i++) {
          result[i] = ASCII_SOURCE[(Math.random() * ASCII_SOURCE_LENGTH) | 0];
      }
  
      return result.join(EMPTY);
  }
docs: Generates a random string of given length (useful for nonce generation, etc).
  
  @param {Number} length