I don't know who gave you that advice, but version 0.23 is almost 10 years old and full of bugs (by modern standards). If you want to study the current state of CSV parsing, you should look at Text::CSV_XS and Text::CSV. Both have other maintainers than 10 years ago, and both do now mostly what the community expects it to do and more. The XS version is way faster than the pure-perl version, but it is save to always use Text::CSV, as that will use Text::CSV_XS under the hood if it is installed.

wind's paste is fine. I would make small changes to include the relative new auto_diag to catch all errors:

use File::Copy qw(move);
use Text::CSV;

use strict;
use warnings;
use autodie; # no need to catch open/read/write/close errors anymore

my $csv = Text::CSV->new ({ binary => 1, auto_diag => 1, eol => "\n" }
+);

my $oldfile = "old.csv";
my $newfile = $oldfile . ".tmp";

open my $in,  "<", $oldfile;
open my $out, ">", $newfile;

while (my $row = $csv->getline ($in)) {
    splice @$row, 1, 0, "New Col 2";
    $csv->print ($out, $row);
    }

close $in;
close $out;

[download]

Enjoy, Have FUN! H.Merijn

In reply to Re: adding a new column to a CSV by Tux
in thread adding a new column to a CSV by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.