There's a functional module somewhere with reduce in it, I think.
Anyway, you said map, here's my solution...
my @ans =
my $func = $_;
my($first, $second) = @_;
return ($first eq $second) && $first;
, map(&$func, @data));
my $ctr = $_;
my $str = $_;
substr($str, 0, $ctr);
print pop(@ans), "\n";
I faked a reduce to test it, it works on this dataset.
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