I would agree with ikegami's post above, the only thing I'd add it that you should probably sort the array before using it as a key, if [1, 2, 3] , [3, 2, 1] and [2, 1, 3] are considered identical. 
my %seen;
@AoD = grep !$seen{ join(',', (sort {$a<=>$b} @$_ )) }++, @AoD;

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print "Good ",qw(night morning afternoon evening)[(localtime)[2]/6]," fellow monks."

In reply to Re^2: Eliminate Array of array duplication by Utilitarian
in thread Eliminate Array of array duplication by Kandankarunai

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