Dear Monks,
I would like to give a feedback.
It works great now (the hash solution twice so fast as a solution with a sub).
Still I have a problem :-)
There are many files which I process. Neither of files have every field in the header, which I modify. Some of files have even no such fields in their header. I noticed that e.g.
 $index{"NAME"}; returns undef in these cases which is interpreted as 0. Therefore the first column in these files is erroneously modified.
I did the following thing: 
if ($index{"NAME"} =~/\d+/)    {
        $parts[$index{"NAME"}] = "";
    }

[download]
and this works. I need to repeat this preamble each time however. Is this a workaround or the solution (i.e. can this be done better)? Please note that the different fields are processed differently (some become "", some become replacement of digits etc.). Thanks! VE

In reply to Re: Parsing Header Last Field by Anonymous Monk
in thread Parsing Header Last Field 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.