I get multipe values for my keys and values appeared more than one

Each hash key only holds one value. In this case, the value is a reference to an anonymous array. So your question really is "How can I remove duplicate elements from a list or array?"

This is a FAQ. You'ld process each anonymous array and remove duplicates, or create a new anonymous array holding unique items and assign that to the value slot of each hash entry.

If you don't want to reassign to the value slot - because, say, the reference is stored elsewhere too, and you don't want that link to be destroyed - you could use splice to edit the anonymous arrays in-place, like this:

$HASH1 = {
    'Alabama' => [
        'Andalusia', 'Anniston', 'Clanton', 'Eufaula',
       'Auburn', 'Bessemer', 'Eufaula', 'Auburn', 'Bessemer',
    ],
    'California' => ['Barstow','Barstow'],
    'Georgia' => ['Darien'],
    'New York' => [
        'Amsterdam','Coney Island','Coney Island',
        'Becon','Becon',
    ],
};
for my $key ( keys %$HASH1 ) {
    my $arrayref = $HASH1->{$key};

    my %seen; # empty at each iteration
    $seen{$_}++ for @$arrayref;

    # process array from the end towards beginning

    for my $index ( reverse 0 .. $#$arrayref ) {
        if ( $seen{$arrayref->[$index]} > 1 ) {
            $seen{$arrayref->[$index]}--; 
            $removed = splice @$arrayref, $index, 1;
            print "key $key: removed '$removed'\n";
        }
    }
}
dd $HASH1;
__END__
key Alabama: removed 'Bessemer'
key Alabama: removed 'Auburn'
key Alabama: removed 'Eufaula'
key New York: removed 'Becon'
key New York: removed 'Coney Island'
key California: removed 'Barstow'
{
  "Alabama"    => [
                    "Andalusia",
                    "Anniston",
                    "Clanton",
                    "Eufaula",
                    "Auburn",
                    "Bessemer",
                  ],
  "California" => ["Barstow"],
  "Georgia"    => ["Darien"],
  "New York"   => ["Amsterdam", "Coney Island", "Becon"],
}

[download]

Note that in the OP, in the anonymous array for the key New York you have the entries Becon and Beacon which are different - a typo, I guess.

perl -le'print map{pack c,($-++?1:13)+ord}split//,ESEL'

In reply to Re: Hash Multiple values for a key-Filtering unique values for a key in hash by shmem
in thread Hash Multiple values for a key-Filtering unique values for a key in hash by rahulme81

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.