Beefy Boxes and Bandwidth Generously Provided by pair Networks
Pathologically Eclectic Rubbish Lister
 
PerlMonks  

Re^2: Printing Last Element of a line using perl memory?

by dave_the_m (Prior)
on Feb 15, 2013 at 12:53 UTC ( #1018887=note: print w/replies, xml ) Need Help??


in reply to Re: Printing Last Element of a line using perl memory?
in thread Printing Last Element of a line using perl memory?

That code is bad in so many ways.
# open the file using _ to avoid multiple system calls invoked by perl open _,"filename";
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.

my @lines=<_>;
This will crash with memory exhaustion if the file is too large
@lines[$#lines];
With warnings enabled, that will give:
Scalar value @lines[$#lines] better written as $lines[$#lines]
But could be even better written as
$lines[-1]

Dave.

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1018887]
help
Chatterbox?
[Corion]: marto: Heh - I think that's a nice contractual trap, "you will not use other gods/engines besides ours" ;)
[Corion]: But if the base intention was to have CIG as "co-developers" who (have to) contribute changes back to the mainline, it makes sense to have them use no other engine
[marto]: yes, I hear that development house has been on its last legs for a couple of years now
[Corion]: Is anybody aware of what makes Android Oreo better than Android Nougat? I'm not sure if the architectural changes (etc) are there already that make upgrading an Oreo-kernel phone to a newer Android userland (Lineage OS) version feasible
[Corion]: Yeah, CryTek got blindsided (or whatever) by Unity and Unreal Engine being zero cost, and the CryTek documentation being bad/nonexistent I think
[Corion]: "zero monetary cost", because of course, it's gratis only if your time has no value :)
[marto]: I used to keep up to date with my android ROMs, updating to the nightly every other day
[marto]: in my experience the jump in major releases has been painless, and performed better

How do I use this? | Other CB clients
Other Users?
Others musing on the Monastery: (6)
As of 2017-12-14 10:39 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    What programming language do you hate the most?




















    Results (389 votes). Check out past polls.

    Notices?