Hello dotowwxo, welcome to perl and to the monastery.

Data::Dump is a useful tool for debugging. Add use Data::Dump qw( pp ); at the top and then you add: print '@row is now: '.pp(@row)."\n"; inside your loop. You'll find that it only ever has one element, that's because @row = $row replaces the content by $row only. Also my declares (creates) a new array, so even if you didn't replace the content, is starts empty anyway.

You can read all the lines in an array like this: my @rows = <$fh>; Then you can simply remove the while loop and use only the inner one.

Edit: I renamed @row as @rows, because hippo is right

In reply to Re: Use of uninitialized value $i in bitwise and (&) at <Netmask.pm> by Eily
in thread Use of uninitialized value $i in bitwise and (&) at <Netmask.pm> by dotowwxo

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