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Re: Modern best practices for multilingual regexp alphabetical character matching?

by ikegami (Patriarch)
on Jan 12, 2009 at 21:40 UTC ( [id://735814]=note: print w/replies, xml ) Need Help??

in reply to Modern best practices for multilingual regexp alphabetical character matching?

The data I'm working with will all be UTF-8, if that makes a difference.

Make sure it's decoded using one or more of the following

use utf8; # Treat the source code as UTF-8 use open ':std', ':locale'; # Treat STD* as per locale use open ':std', ':encoding(UTF-8)'; # Treat STD* as UTF-8 use open IO => ':encoding(UTF-8)'; # Treat files as UTF-8 by default open(my $fh, '<:encoding(UTF-8)', $qfn) # Treat a file as UTF-8 utf8::decode(my $text = $encoded_text) # Treat a string as UTF-8 or die;

And make sure the string us stored internally as UTF-8.

utf8::upgrade($s); # Use UNICODE semantics

(No need to do use utf8; to use utf8:: functions. use utf8; means the source is in UTF-8.)

If you do those two things, regexp will use UNICODE semantics, so \w and character classes will match accented letters, etc.

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