code: function getArrayOfHoles(length) {
    var holyLen = HOLY_ARRAY.length;
    if (length > holyLen) {
      HOLY_ARRAY.length = length;
      for (var i = holyLen; i < length; ++i) {
        HOLY_ARRAY[i] = ARRAY_HOLE_INDEX;
      }
    }
  
    return HOLY_ARRAY.slice(0, length);
  }
docs: Returns an array of the given length filled with ARRAY_HOLE_INDEX.