Sounds like a job for regular expressions:

$stuff =~ s/(frontStuff)(stuffToMove1)(middleStuff)(stuffToSwap2)(endi
+ngStuff)/$1$4$3$2$5/;

[download]
Grab the chunks and swap the #2 and 4 captures for the replace.

PS: This would require multi-line match mode, given your input data; the "middlestuff" would be a newline.


An alternative way to do it, given the regularity of your data, might be to save each record into a hash, then print the hash values back out in whichever order you like. Useful if you're not totally sure of your data, and could be used to remove duplicates or fill in missing fields quite easily.

- SJ

How to make perldoc.perl.org resizable too!

In reply to Re: swapping lines that match a condition by SuicideJunkie
in thread swapping lines that match a condition by TheBigAmbulance

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.