> I have a variable in my script that is taking on a value
> from a hash:
>
> my $myvar = $hashname{$key}{$subkey}{in};
>
> Where $hashname{$key}{$subkey}{in} may have never been
> assigned a value. I later try to use $myvar (I use
> strict and warnings), and get an error "Use of
> uninitialized value in ..."
>
> I want to test $myvar immediately after the assignment
> to see if it is uninitialized. I then get the same
> error on my conditional.
>
> I have tried a few things, checked the Camel book and the
> Cookbook, and tried to find something with my rudimentary
> knowledge of perldoc. I'm guessing/hoping that there is
> a test for uninitialized. Please point me towards the
> correct answer in any of the listed resources.
if ($myvar != undef) {...}
if (defined $myvar) {...}
perldoc -f perlvar # Obviously
Camel page 58, 697 (look up the index, like me!)
Cookbook page 1-3 (I guess it's knowing where to start ;)
Jonathan Paton
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