It was in an item by Dominus (I think) that I found out that the \u and \L operators are interchangeable. i.e
$x = "string";
$x = "\u\L$x";
print $x,"\n";

$x = "string";
$x = "\L\u$x";

print $x,"\n";

[download]
Gives
String
String

[download]
The reasoning behind this being that Perl assumes you made a typo and put them in the wrong order.

Do the Monks think that this is a good idea or not? Should Perl make this assumption?
Are there any other ocasions when Perl will do this sort of thing?

Granted it seems a harmless and reasonable thing to do in this case, but I remember having great 'fun' years ago with a 'C' compiler that when it discovered a undeclared variable would try to pattern match an existing one also assuming a typo.

Look, I'm not much good at big speeches, and I know I haven't always been an easy guy to get on with. And I know that, given the choice, I probably wouldn't have chosen you as friends. But, I just want to say ... that over the years, ... I have come to regard you ... as ... people ... I met. I'd just better go, OK?
Rimmers Farewell speech (one of them) - Red Drawf

In reply to Opinons Please by Jonathan

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.