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( [id://3333]=superdoc: print w/replies, xml ) Need Help??
I have to do stuff like this fairly often with a bunch of different format files so I just keep this around as a generic framework. I modify the regex statements, delimiter and number of fields as necessary but it's pretty much the same program every time.

Here's what I use - lifted almost completely from various posts here on PM...

#!/usr/bin/perl use warnings; use strict; open INFILE, "< $ARGV[0]" or die "Could not open file $ARGV[0]: $!"; until(eof INFILE) { my $fn = $ARGV[0]; open OUTFILE, "> $fn.filtered" or die "Could not open file $fn.filtered $!"; while(<INFILE>) { my @line = split /\t/; $line[0] =~ s/(.{1,6}).*/$1/; $line[3] =~ s/(.{1,6}).*/$1/; $line[6] = $line[6]."\n"; $_ = join("\t", $line[0], $line[1], $line[2], $line[3], $line[ +4], $line[5], $line[6]); print OUTFILE; } }
BTW, this code processed an 8 million line/385 mb file in about 33 minutes the other day on my old, anemic Sun Ultra 5 workstation. No brownouts, no sweat. System load never got above 1.05.

Jack


In reply to Re: Pimp My RegEx by jcoxen
in thread Pimp My RegEx by heathen

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