How about using a reference to an array. Here's a little ditty that builds the kind of hash for which you're looking and then prints out the results:

use strict;
use warnings;
use diagnostics;
use Data::Dumper;

my %hash;
my $key;
my $value;

my @data = ("foo",1, "bar",2, "foo",3, "baz",4);

while ($key = shift (@data))
{
   $value   = shift (@data);

   # push the value on the array
   push @{$hash{$key}}, $value;
}

print Dumper \%hash;

[download]

Note: you have to create the anonymous reference -- you can't just push a value if the key doesn't exist.

Update: apparently you can just push the value.

--
Wade

In reply to Re: multiple values for one key in hash by wade
in thread multiple values for one key in hash by sovixi

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