[Fun With Perl] What does this do?

["Juanma Barranquero" <barranquero@laley-actualidad.es>]

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On Wed, 16 Jun 1999 10:23:59 -0400, Mark-Jason Dominus wrote:

> print "\L\uHELLO, \uWORLD\E.\n";

Ouch.

Also:

  $a =3D "\L\uHELLO, WORLD\E"; print "$a\n";
  Hello, world

  $a =3D "\uHELLO, WORLD"; print "\L$a\E\n";
  hello, world

  $a =3D "\LHELLO, WORLD\E"; print "\u$a\n";
  Hello, world

And...

  print "\L\uHELLO, \UWORLD\E\n";
  Hello, WORLD

  print "\L\uHELLO, \lWORLD\E\n";
  Hello, world

but...

  print "\L\uHELLO, \U\lWORLD\E\n";
  syntax error at -e line 1 near "\u\LHELLO, \l\U"

so I'm not sure what's happening.

                                                       /L/e/k/t/u

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