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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"; }

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