Re: scalar / hash problem in HTML::Parser

On Mon, Feb 25, 2008 at 9:01 AM, Tim Bowden <tim.bowden@xxxxxxxxxxxxxx> wrote:
Making progress. Needed to understand hash references, and how to
de-reference them.
snip

Quick cheat ***:

#make a hash reference
my $ref = \%hash;
my $ref = { key1 => "val1", key2 => "val2" };
my $ref = { %hash };

#access a key
print $ref->{key1};

#access a slice
print join("\t", @{$ref}{qw<key1 key2>}), "\n";

#get all of its keys
my @keys = keys %{$ref}; #note, the {} are only necessary if $ref is a
complex expression

$ref can be any scalar value that hold a hash reference, so say you
have an array of hash refs named @foo, you can say

my @keys = keys %{$foo[0]};

to get the keys of the first element in @foo.

--
Chas. Owens
wonkden.net
The most important skill a programmer can have is the ability to read.
.

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