Note: open OUT,">$file"; the > mode creates the file if it doesn't exist or truncates it if it does. This is why the file is blank.

As to your stated problem, aside from doing odd things with >+ mode and seek, the easiest way would probably be to open the file in read mode (<,or no mode) read the file in to an array doing any alteration, then close the file and open it in write mode and write your array. This isn't very secure though, as if your script crashes right after it opens the file in write mode you just lost all your data. The general way around this is to write the modified file data to a seperate file and then just rename that new file to the filename of the old one.

In reply to Re: simple substitution by BUU
in thread simple substitution by wolverina

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.