I've been in deep meditation over this problem for many minutes and now numbly submit the problem to you:

When this block of code is called with a REQUEST_URI of "/" it does not execute listall(); 

my ($username, $imagename) = $ENV{REQUEST_URI} =~ /\/(.*)\/(.*)/;
if(not defined $username || $username eq ""){
    listall();
    }

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However when this block is executed with the same REQUEST_URI, listall(); is executed. 
my ($username, $imagename) = $ENV{REQUEST_URI} =~ /\/(.*)\/(.*)/;
if(not defined $username){
    listall();
    }

[download]
Why is this? The only thing I can think of is that the order of precedence dictates that the "not" be after the ||.

-caedes

In reply to When art thy variables defined? by caedes

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