function initCloneArray(array) {
	  var length = array.length,
	      result = array.constructor(length);

	  // Add properties assigned by `RegExp#exec`.
	  if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
	    result.index = array.index;
	    result.input = array.input;
	  }
	  return result;
	}
Used to detect octal string values.