Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl Monk, Perl Meditation

Re: tripping over filehandle / subroutine usage

by LanX (Chancellor)
on Dec 21, 2012 at 21:43 UTC ( #1009962=note: print w/replies, xml ) Need Help??

in reply to tripping over filehandle / subroutine usage

just a guess:

if your FH is at EOF after the first subroutine you should reset the position to start using seek before expecting to read again in another sub.


ok, now that you updated code it seems like my guess was right:

my @rows = (<$input_handle>);

exhausts your filehandle.

BTW you should consider working with something like

while ( my $line = <$input_handle>) {
to read line by line, when working with large files, because otherwise you're consuming lots of RAM.

Cheers Rolf

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1009962]
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others lurking in the Monastery: (5)
As of 2017-06-24 02:40 GMT
Find Nodes?
    Voting Booth?
    How many monitors do you use while coding?

    Results (556 votes). Check out past polls.