Well, this is a piece of code i use and it works well :-). But i can't understand how it works, can anyone help ...

When one store text in an MSSQL server text field it replaces the new lines with \r\r\n and it confuses perl when i take it out again and parse it. however the following code fixes it ... I takes the text field from sql server store it in a file, then i apply the following code on it, and the text file turns back to normal 

open(IN, "$ARGV[0]") || die "unable to open $ARGV[0]"; 
open(OUT, ">$ARGV[1]") || die "unable to open $ARGV[0]"; 


  binmode(OUT);        #set output mode as binary
  while(<IN>)
  {
    if(/^\n$/) 
    { 
      print OUT "\r\n"; # if this the record separator, print a proper
+ line
    } 
    else { print OUT; }    # else just print line with a CR
  }

  close(IN); close(OUT);

[download]

but how does that work

In reply to Can anyone figure how this works? by thesundayman

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.