As others already suggested, you need to (1) use a hash for uniqueness and (2) serialize your arrays to make sure they don't match by chance. Here is one of many possible implementations: 

#!/usr/bin/env perl

# https://www.perlmonks.org/?node_id=1221504

use strict;
use warnings;
use Data::Dumper;

my @aoa = (
    [qw[sun and fun]],
    [qw[sunand fun]],
    [qw[sun and fun]],
    [qw[fun and sun]],
);

# first off, serialize the array somehow
# Multiple methods may exist, depending on expected content of arrays
sub concat {
    my $array = shift;
    # we replace \ with \\ and use a literal \n for delimiter,
    #    so no confusion may occur
    return join "\\n", map { s/\\/\\\\/g; $_ } @$array;
};

# Use a hash for uniqueness
# this would've been grep { !$uniq{$_}++ } @aoa if @aoa was just strin
+gs
my %uniq;
my @no_dupes = grep { !$uniq{ concat($_) }++ } @aoa;

# Check the data
print Dumper(\@no_dupes);
print Dumper(\%uniq);

[download]

In reply to Re: Remove Array Duplicates from Array of Arrays by Dallaylaen
in thread Remove Array Duplicates from Array of Arrays by Anonymous Monk

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