This modules works well - but only sometimes - date conversions and large spreadsheets are the ones that cause it to act up!!!!!

Currently, I notice the dates are erratically being left as numbers - and converted other times to dates. When i troubleshooted the module code, I feel the problem is in this part - 

This is the code
                        $member_styles -> contents =~ /numFmtId="$t1" 
+formatCode="([^"]*)/;
                        my $formatCode = $1 || '';

[download]
because the regex extraction doesnt work for some date formats. I have listed the content of the numFMT tags the REGEX was trying to extract formatCode substrings from. However, I cant tell, why the regex fails. Can someone point out why the Regex would fail extracting the substring?
Many thanks in advance! 

This is the data
<numFmts count="7">
<numFmt numFmtId="43" formatCode="_(* #,##0.00_);_(* \(#,##0.00\);_(* 
+&quot;-&quot;??_);_(@_)"/>
<numFmt numFmtId="164" formatCode="[$-409]h:mm\ AM/PM;@"/>
<numFmt numFmtId="165" formatCode="m/d;@"/>
<numFmt numFmtId="166" formatCode="ddd\ mm/dd/yy"/>
<numFmt numFmtId="167" formatCode="0.0%"/>
<numFmt numFmtId="168" formatCode="&quot;$&quot;#,##0.00"/>
<numFmt numFmtId="169" formatCode="m/d/yy;@"/></numFmts>

[download]

In reply to spreadsheet XLSX by lpanokarren

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.