Hashes can't have duplicate keys. If you assign to a pre-existing hash key, the old value is simply overwritten. Consider the following simplistic example: 
my %foo = (
           animal => 'monkey',
           fish   => 'tuna',
           insect => 'ant',
           insect => 'spider'
           );

while (my ($key, $value) = each %foo) {
    print "KEY: $key\n  VALUE: $value\n";
}

[download]
This prints out the expected: 
KEY: insect
  VALUE: spider
KEY: animal
  VALUE: monkey
KEY: fish
  VALUE: tuna

[download]
Note that there is no ant in there. So I'm missing something obvious, or you'll be stomping on a value.

In reply to Re: How to process named parameters that have the same key name? by Nkuvu
in thread How to process named parameters that have the same key name? by Anonymous Monk

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