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Full Discussion: CSV with commas in field values, remove duplicates, cut columns
Top Forums Shell Programming and Scripting CSV with commas in field values, remove duplicates, cut columns Post 302580223 by balajesuri on Thursday 8th of December 2011 01:25:21 AM
Old 12-08-2011
The below program will print 4 fields out of 6. Its may not be efficient as it goes through a lot of loops. Or if you have Perl's Text::CSV module installed, you may try that too.

input.txt:
Code:
test0,"hello,world,earth,universe","asia",antartica,"arctic",pacific,
test1,"abc,pqr,xyz,123","sed,awk,grep",perl,c,java
test2,"hel,wor,ear,uni","asi",ant,"arc",pac
test3,"start,middle,end",blue,green,red,white,

Code:
#! /usr/bin/perl -w
use strict;
open INPUT, "< input.txt";
for (<INPUT>) {
    my @y = split //,$_;
    my ($flag, $ln, $count) = (0, '', 0);
    for (@y) {
        if ($count == 4) {
            print "$ln\n";
            last;
        }
        if ($_ eq '"' && $flag == 0) {
            $flag = 1;
            $ln .= $_;
        }
        elsif ($_ eq '"' && $flag == 1) {
            $flag = 0;
            $ln .= $_;
        }
        elsif ($_ eq ',' && $flag == 0) {
            $count++;
            $ln .= $_;
        }
        else {
            $ln .= $_;
        }
    }
}
close INPUT;

output:
Code:
test0,"hello,world,earth,universe","asia",antartica,
test1,"abc,pqr,xyz,123","sed,awk,grep",perl,
test2,"hel,wor,ear,uni","asi",ant,
test3,"start,middle,end",blue,green,

 

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LEARN ABOUT DEBIAN

rdf::trine::exporter::csv

RDF::Trine::Exporter::CSV(3pm)				User Contributed Perl Documentation			    RDF::Trine::Exporter::CSV(3pm)

NAME

       RDF::Trine::Exporter::CSV - Export RDF data to CSV

VERSION

       This document describes RDF::Trine::Exporter::CSV version 1.000

SYNOPSIS

	use RDF::Trine::Exporter::CSV;

DESCRIPTION

       The RDF::Trine::Exporter::CSV class provides an API for serializing RDF data to CSV strings and files.

METHODS

       "new ( sep_char => $sep_char, quote => $bool )"
	   Returns a new RDF::Trine::Exporter::CSV object. If $sep_char is provided, it is used as the separator character in CSV serialization,
	   otherwise a comma (",") is used.

       "serialize_iterator_to_file ( $file, $iterator )"
	   Serializes the bindings objects produced by $iterator, printing the results to the supplied filehandle "<$fh">.

       "serialize_iterator_to_string ( $iterator )"
	   Serializes the bindings objects produced by $iterator, returning the result as a string.

BUGS

       Please report any bugs or feature requests to through the GitHub web interface at <https://github.com/kasei/perlrdf/issues>.

AUTHOR

       Gregory Todd Williams  "<gwilliams@cpan.org>"

COPYRIGHT

       Copyright (c) 2006-2012 Gregory Todd Williams. This program is free software; you can redistribute it and/or modify it under the same terms
       as Perl itself.

perl v5.14.2							    2012-06-29					    RDF::Trine::Exporter::CSV(3pm)
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