Ugh. What if you have a title of 'Why "foo", "bar", and "baz"?' and it gets written to a CSV file as: ...,16,"Why "foo", "bar", and "baz"?",20,... then how do you expect to be able to tell which "s need to be escaped??

Well, I'll try me best... Let's assume that no title contains a string matching /",\S/ and that there is never whitespace after a comma in your CSV file. 

s{
    \G(
        [^",]+
    |
        "(.*?)"
    )(,(?=\S)|$)
}{
    if(  ! $2  ) {
        $1.$3;
    } else {
        my $f= $2;
        $f =~ s/"/""/g;
        '"'.$f.'"'.$2;
    }
}gx;

[download]

If you do have whitespace after commas, then an alternate solution would be to assume that all titles that contain "s always contain an even number of quotes and that the first character after the first quote of a pair isn't a comma: 

s{
    \G(
        [^",]+
    |
        "((?:
            [^"]+
        |   ""
        |   "[^",][^"]*"
        ))*"
    )(,|$)
}{
    if(  ! $2  ) {
        $1.$3;
    } else {
        my $f= $2;
        $f =~ s/"/""/g;
        '"'.$f.'"'.$2;
    }
}gx;

[download]
I hope one of those helps. (Sorry, they aren't tested. Just tell me which one matches your situation and I'll be happy to help if there are bugs.)

        - tye (but my friends call me "Tye")

In reply to (tye)Re3: A Little review for a little DBI and CGI? by tye
in thread A Little review for a little DBI and CGI? by coolmichael

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.