Wow thank you. I am used to vb and c#, not PERL. It is so different to me. I changed it to 
sub addSecondary()  
{
        my ($email, $secondary) = @_;

        use Tie::File;
        tie @array, 'Tie::File', 'registration.dat';

        for (@array)
        {
                s/0;nodata/1;$secondary/gi if /$email/
        }

        untie @array;
}

[download]
And it works now. What I don't get is why s/0;nodata/1;$secondary/gi if /$email/ works. There is no semicolon at the end and it is not like any function I have seen. I am used to something = something type notation. How does it even know what to look at and compare?

In reply to Re^2: Appending to a file. by xavierarmadillo
in thread Appending to a file. by xavierarmadillo

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.