As for your example, what good is it to use a labelled loop for a list containing one variable? ;-)

That's easy.

  1. The label is there to show that the block is emulating as a SWITCH statement.
  2. The label is also there to show what the last statements refer to.
  3. the for with just one variable is simply there to assign $value to $_ without explicitly doing it
  4. it's also there to keep the original content of $_ outside the SWITCH ("loop"). Try this 
    my $v="V";
$_="_";
for ( $v ) {
    print "inside: $_\n";
}
print "outside: $_\n";

    [download]
  5. It looks good ;-) (to me). I read this as "switch for value ..."
s$$([},&%#}/&/]+}%&{})*;#$&&s&&$^X.($'^"%]=\&(|?*{%
+.+=%;.#_}\&"^"-+%*).}%:##%}={~=~:.")&e&&s""`$''`"e

In reply to Re^4: Avoiding if/else knots II by Skeeve
in thread Avoiding if/else knots II by loris

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.