There is a similar technique which is slightly faster (~5-7%) on larger lists: 
my %h;
grep { !$h{$_}++ } @list;

[download]
The answer by dvergin is actually about 50% faster for lists smaller than ~2000 items.

In reply to Re: How can I display a unique array if it contains some repeated elements by tadman
in thread How can I display a unique array if it contains some repeated elements by Anonymous Monk

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