in reply to Unicode Case Conversion

try to use a regexp, lc and uc won't work . 
perl -le '$bla = "é_to_upper"; $bla  =~ s/é/É/g; print $bla ;'

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Update:Zaxo is right:
perl -le 'my $e ="é"; utf8::upgrade($e); print uc $e;'
#prints É

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"We all agree on the necessity of compromise. We just can't agree on when it's necessary to compromise." - Larry Wall.

In Section Seekers of Perl Wisdom