It seems to me you're asking how to simplify these lines: 
foreach my $line (@port) {
    my @PORTS = split('\n', $line);
        foreach my $str (@PORTS){
            ...
        }
    }
}

[download]
Perhaps something like this: 
for my $str ( map { split /\n/ } @port ) {
    ...
}

[download]

In reply to Re: array and string split by Anonymous Monk
in thread array and string split by numele

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