in reply to Case shifting on accented characters

$ perl -MData::Dump -E " $f=qq{É\N{U+00C9}}; dd( $f ); dd(fc( $f )); "
"\xC9\xC9"
"\xE9\xE9"

[download]

http://perldoc.perl.org/functions/fc.html
http://perldoc.perl.org/perlfunc.html#fc
https://en.wikipedia.org/wiki/%C3%89#Character_mappings

In Section Seekers of Perl Wisdom