You can try using a reference instead of hash like :
------------------
my $entries;
my($state, $zipcodes);
while (my $line = <DATA>) {
chomp $line;
($state, $zipcodes) = split (/=/, $line);
push( @{ $entries->{$state} }, split( /,/,$zipcodes) )
}
print Dumper ($entries);
__DATA__
AK=995,996,997,998,999
Output:
---------
$VAR1 = {
'AK' => [
'995',
'996',
'997',
'998',
'999'
]
};
I guess you want output something like this .
> From: p...@surfshopcart.com
> Subject: Creating a hash of arrays from <DATA>
> Date: Wed, 9 Jul 2014 18:59:58 -0700
> To: beginners@perl.org
>
> I'm having a problem creating a hash of arrays. The while loop below
> works, but it's working too well. ;) Instead of giving me 5 values (from the
> example data below), it's giving me 25. I don't understand why it seems to
> be "looping" through the push statement.
>
> If someone could explain what I'm doing wrong, I'd appreciate it. I
> just can't see it.
>
> Thanks,
> Frank
>
> --------------------------
>
> use strict;
> use warnings;
> use 5.010;
>
> use Data::Dumper;
>
> my %entries;
>
> while (my $line = <DATA>) {
> chomp $line;
> my($state, $zipcodes) = split (/=/, $line);
> push( @{ $entries{$state} }, split( /,/ => $zipcodes) )
> }
>
> foreach my $state (sort keys %entries) {
> say "The Zip Codes of $state are";
> foreach (@{$entries{$state}}) {
> print Dumper (@{$entries{$state}});
> }
> }
>
>
> __DATA__
> AK=995,996,997,998,999
>
>
> --OUTPUT--
> The Zip Codes of AK are
> $VAR1 = '995';
> $VAR2 = '996';
> $VAR3 = '997';
> $VAR4 = '998';
> $VAR5 = '999';
> $VAR1 = '995';
> $VAR2 = '996';
> $VAR3 = '997';
> $VAR4 = '998';
> $VAR5 = '999';
> $VAR1 = '995';
> $VAR2 = '996';
> $VAR3 = '997';
> $VAR4 = '998';
> $VAR5 = '999';
> $VAR1 = '995';
> $VAR2 = '996';
> $VAR3 = '997';
> $VAR4 = '998';
> $VAR5 = '999';
> $VAR1 = '995';
> $VAR2 = '996';
> $VAR3 = '997';
> $VAR4 = '998';
> $VAR5 = '999';
>
>
> http://www.surfshopcart.com/
> Setting up shop has never been easier!
>
> Now on GitHub
> https://github.com/surfshopcart/surfshop
>
>
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