Is there an easy way to lookup the causes and possible solutions to the use warnings messages?

The particular one I am getting is: warning: Use of uninitialized value in string at script.pl line 14.

14:my $c = "$a$b";

At this point, $b may or may not contain anything - if its does, it want it if not that's ok too.

I tried my c$ = "$a$b" if ($b); but that means c$ doesn't get defined if b$ has no value. So then I have to move to my c$ = ($b) ? "$a$b" : "$a"; but that seems a bit hookey to prevent a warning about something I knew would be true and didn't mind?

Is there a better way of avoding the warning?

Edit kudra, 2002-06-08 Changed title

In reply to Uninitialized value in string warnings (was: Warnings:) by Anonymous Monk

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