Subj : Re: problem with string objects loosing their properties
To   : Helge Hess <helge.hess@skyrix.com>
From : Brendan Eich <brendan@meer.net>
Date : Sat Jun 21 2003 02:34 pm

Log String.prototype and String.prototype.split whenever you find a 
string literal that seems to lack a length property.  In general, you 
should log more information, and not use == null to test for undefined 
(use the in operator to test whether there is a length property:

'length' in "hello";

then if so, get its value into v and print(uneval(v))).

/be

.