Use of uninitialized value $_ in pattern match (m//)

[abhimanyu3-zz]

can you please share a working example. I am not able to get it working and always get teh below error

Use of uninitialized value $_ in pattern match (m//) at ./pertopy.pl line 179, <> line 5.

[OlivierLaflamme]

Yeah theres a ton of these not sure how hes going to fix ...