Nice, just a slight style improvement: 

map { $h{join($;, @$_)}++ == 0 ? $_ : () } @_;

[download]

becomes 

grep { ! $h{join($;, @$_)}++ } @_;

[download]

In reply to Re^2: Fast Way to Return Unique Array of Array by calin
in thread Fast Way to Return Unique Array of Array by neversaint

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