http://qs321.pair.com?node_id=611194


in reply to hash assignment wierdness

Hi Bro. Doug.

As mentioned in the chatterbox by andye++, the Data::Dumper module, while not perfect, is a useful tool. 
#!/usr/bin/perl 
use warnings; 
use strict; 
use Data::Dumper; 

my %hash = undef; 
print Dumper \%hash; 

#Output 

$VAR1 = {
          '' => undef
        };

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Update: bart++ for suggesting a reference to %hash.

Hope this helps,
~Katie

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Re^2: hash assignment wierdness
by shmem (Chancellor) on Apr 21, 2007 at 12:33 UTC
    The output of Data::Dumper is misleading here, as it looks like undef was assigned to the value, not the key. But it's the key that gets the scalar: 
    qwurx [shmem] ~ > perl -le '%h = "one"; print "$_ => $h{$_}" for keys 
+%h'
one =>

    [download]

    --shmem 

    _($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}
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