It is not clear why you are diddling the data, what you call "format the columns", so why are you? You should do that after parsing into cvs, not before

Somehow I have a feeling that this code is not efficient but it works.

Thats just gas, don't worry about it

Is it worth to improve it or just use it as it is?

The code is literally 20 lines, there is nothing to improve

The only possible thing is use "modern perl" practices, meaning use 3 argument open, and lexical filehandle, and maybe use autodie because the error message is better 

$ perl -Mautodie -le " open my $fh => '<', '23232' "
Can't open '23232' for reading: 'No such file or directory' at -e line
+ 1

[download]

In reply to Re: ideas on how to improve existing code by Anonymous Monk
in thread ideas on how to improve existing code by trolis

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.