Indeed. If one desires for [1,2,3] and [3,2,1] to be considered identical, they must have identical signatures, and that can be achieved by sorting the numbers.

I doubt that's going to be a common desire, but if it happens, it's probably cleaner to normalise the data before finding the dups. 

# Normalise the data.
@$_ = sort { $a <=> $b } @$_ for @AoD;

# Filter out duplicates.
my %seen;
@AoD = grep !$seen{ join(',', @$_) }++, @AoD;

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In reply to Re^3: Eliminate Array of array duplication by ikegami
in thread Eliminate Array of array duplication by Kandankarunai

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