I'd do it like this:

my @array = qw/aa bb cc aa cc cc dd aa aa/;
my %sums;
$sum{$_}++ foreach @array;
print "$_ = $sums{$_}\n" foreach keys %sums;

[download]

Dave

In reply to Re: Counting unique elements in an array by davido
in thread Counting unique elements in an array by Anonymous Monk

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