willjones:

The problem you're having is that $hashRef is a reference to a hash, it's not a hash itself:

my %hash = (a=>1, b=>2);
my $hashRef = { c=>3, d=>4 };

# For a hash, you can reference the item as you expect:
my $v = $hash{a};

# For a hash ref, you need to either use a double $, or
# use an arrow:
$v = $hashRef->{c};
$v = $$hashRef{c};

[download]

You can use a reference to manipulate a hash, too:

# Get a reference to %hash
$hashRef = \%hash;

$v = $hashRef->{a};  # $v now holds 1

[download]

...roboticus

When your only tool is a hammer, all problems look like your thumb.

In reply to Re: Hash dereferencing in a loop by roboticus
in thread Hash dereferencing in a loop by willjones

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