Hello Perl's Monks,

I've got the following issue :

I've got a csv file (where fields are separated with , (commas)) and that can have , (commas) inside the fields. This is the reason why I've used the Text::CSV module.

My goal is to remove some unused fields (columns) and to swap some of them.

Input file :

column1,column2,column3,column4,column5,column6
datar1c1,datar1c2,datar1c3,datar1c4,datar1c5,datar1c6
datar2c1,"data,r2c2",datar2c3,datar2c4,datar2c5,datar2c6
datar3c1,datar3c2,"data, r3c3",datar3c4,datar3c5,datar3c6
[download]

Expected output file :

column2,column1,column4,column3
datar1c2,datar1c1,datar1c4,datar1c3
datar2c2,datar2c1,datar2c4,datar2c3
datar3c2,datar3c1,datar3c4,"data, r3c3"
[download]

In this example, I want to remove the 2 last columns and swap columns 1 and 2 and columns 3 and 4.

The following code removes the columns 5 and 6 but I don't know how to swap the columns.

#!/usr/bin/perl

use strict ;
use warnings ;

use Text::CSV ;
use Getopt::Long qw(GetOptions) ; 

my $inputFile = '' ;
my $outputFile = '' ;
my $csv = Text::CSV->new ();

GetOptions(    'file:s' => \$inputFile,
        'out:s' => \$outputFile,
      ) or die("Error in command line arguments\n") ;

open(my $data, '<:encoding(utf8)', $inputFile) or die "Could not open 
+'$inputFile' \n" ;
open(my $out, '>:encoding(utf8)', $outputFile) or die "Could not open 
+'$outputFile' \n" ;

while (my $fields = $csv->getline( $data ))
{
    splice @$fields, 4, 2 ;
    $csv->print($out, $fields) ;
    print $out "\n" ;
}

close $data ;
close $out ;
[download]

Could you help me ?

Regards.

Xuo.

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