Subj : Spidermonkey: Hash array lookup failure
To   : netscape.public.mozilla.jseng
From : pppp2pppp
Date : Mon May 03 2004 06:24 pm

(Hopefully this is ontopic, please redirect me if not)

Hi, is there a JS1.3 to JS1.5 way to detect Hash array lookup
failures??
I have code like so:-

try
   {
   groupID = groupHash[students[i][0] + "_" + columnLookup["ID"][j]]
[0];
   }
catch(ex)
   {
   groupID = 0;
   }

Which works fine in v5+ browsers.

But NN4 (JS1.3 i think) doesn't understand try at all and errors out
(I believe try/catch was introduced in JS1.4).

I can't find a reference to hash arrays in the Javascript references
on DevEdge, but have found example code on the web that gives examples
of Hash arrays in NN4.

How does one handle a lookup failure in the NN4 case?? (which I
imagine should work in v5+ browsers as well).

Thanks in advance,  Hi Chow

.