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Re: replace/substituion 4th field

by põhjapõder (Novice)
on Feb 20, 2013 at 08:21 UTC ( #1019734=note: print w/replies, xml ) Need Help??

in reply to replace/substituion 4th field

Hello hyans.milis,

You should consider using Text::CSV for this task:

#!/usr/bin/perl use strict; use warnings; use Text::CSV; die "Usage: $0 <filename>\n" unless @ARGV > 0; open (my $fh, '<', $ARGV[0]) || die "$ARGV[0]: $!\n"; my $csv = Text::CSV->new(); $csv->eol("\n"); my $sum = 0; while (my $row = $csv->getline( $fh )) { $sum = $row->[3]; if ($sum > 310) { $row->[3] = 'volemd'; } elsif ($sum == 70) { $row->[3] = 'volemd1'; } $csv->print(\*STDOUT, $row); } $csv->eof or $csv->error_diag(); close ($fh);

This should also work with large files, since it processes one line at a time only.

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Node Type: note [id://1019734]
[choroba]: erix Seems too complex
[erix]: do you mean: 'it can be done simpler', or 'it won't work' ?
[choroba]: I wouldn't want to maintain it in the current form
[erix]: ok, but mainainability comes after it has been made to work :)

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