A hash will help, 

my %hsh;
push @{$hsh{$data[$_]}}, $_ for 0..$#data;

for (keys %hsh) {
    printf
        '$data[%d] and $data[%d] have the same value!!',
        @{$hsh{$_}} if @{$hsh{$_}} == 2;
}

[download]
%hsh becomes a Hash-of-Arrays with push, then we just look for arrays bigger than 1. I restricted that to 2 for the example.

Update: tinita++, corrected.

After Compline,
Zaxo

In reply to Re: How do I get the position of the same value in array or list. by Zaxo
in thread How do I get the position of the same value in array or list. by CatcherInTheRye

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