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

Re: Reading files n lines a time

by eyepopslikeamosquito (Chancellor)
on Dec 07, 2012 at 03:02 UTC ( #1007676=note: print w/ replies, xml ) Need Help??

in reply to Reading files n lines a time

Here's a simple way to do it using modulo chunksize on the line number $.

use strict; use warnings; my $fname = shift or die "usage: $0 fname\n"; open(my $fh, '<', $fname) or die "error: open '$fname': $!"; my $chunksize = 4; my $chunk = ""; while ( my $line = <$fh> ) { $chunk .= $line; next if $. % $chunksize; print "---chunk---\n$chunk"; $chunk = ""; } close $fh; if (length $chunk) { print "---chunk (leftover)---\n$chunk"; }

Comment on Re: Reading files n lines a time
Select or Download Code

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1007676]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others drinking their drinks and smoking their pipes about the Monastery: (4)
As of 2015-11-25 02:36 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 (669 votes), past polls