Beefy Boxes and Bandwidth Generously Provided by pair Networks
Keep It Simple, Stupid

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

Comment on Re: tripping over filehandle / subroutine usage
Select or Download Code

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1009962]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others musing on the Monastery: (4)
As of 2015-11-26 03:52 GMT
Find Nodes?
    Voting Booth?

    What would be the most significant thing to happen if a rope (or wire) tied the Earth and the Moon together?

    Results (696 votes), past polls