That code is bad in so many ways.
in reply to Re: Printing Last Element of a line using perl memory?
in thread Printing Last Element of a line using perl memory?
This is complete nonsense. Using an underscore as the filename makes no difference to the execution, but makes the code harder to understand. Also, you should normally use lexical filehandles. Lastly, there's no error checking on the open.
# open the file using _ to avoid multiple system calls invoked by perl
This will crash with memory exhaustion if the file is too large
With warnings enabled, that will give:
But could be even better written as
Scalar value @lines[$#lines] better written as $lines[$#lines]