Given this: 
my @AoA = (
    ['a','b','c'],
    ['a','b','c'],
    ['a','b','d'],
    ['a','b','d'],
);

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I wish to return simply this: 
my @uAoA = (
    ['a','b','c'],
    ['a','b','d'],
);

[download]
From the original posting in SoPW, one can find many answers. One of them is (by TedPride), seems to me to be the most compact of them all: 
use strict;
use warnings;
use Data::Dumper;

my @AoA = (
    ['a','b','c'],
    ['a','b','c'],
    ['a','b','d'],
    ['a','b','d'],
);

my (%h, @uAoA);
for (@AoA) {
    push @uAoA, $_ if !$h{join $;, @$_}++;
}

print Dumper \@uAoA;

[download]

Originally posted as a Categorized Question.

In reply to How do I find unique Array in Array of Arrays? by monkfan

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