If you are willing to rely on the values being sorted and don't want to create a hash of the values like the other solutions you could do something like this. 
my @unique;
for (@array) { push @unique, $_->[1] unless $unique[$#unique] == $_->[
+1] }

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In reply to Re: How do I pull out unique values in a multidimentional array by repson
in thread How do I pull out unique values in a multidimentional array by xorl

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