code: function _arr(chunk, type) {
    var len = this._int(chunk, type);
  
    // allow zero length for the empty array
    if(typeof len === 'number' && !isNaN(len)) {
      var arr = new Array(len);
      this._elements += len;
      Object.defineProperty(arr, '_index',
        {
          enumerable: false,
          configurable: true,
          writable: true,
          value: 0
        }
      );
  
      return arr;
    }
  }
docs: Read an array.