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POHow to match string with diacritic in perl?
 

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  1. POHow to match string with diacritic in perl?
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    <p>For example, match "Nation" in ""Îñţérñåţîöñåļîžåţîöñ" without extra modules. Is it possible in new Perl versions (5.14, 5.15 etc)? </p> <blockquote> <p>I found an answer! Thanks to <strong>tchrist</strong></p> </blockquote> <p>Rigth solution with UCA match (thnx to <a href="https://stackoverflow.com/users/471272/tchrist">https://stackoverflow.com/users/471272/tchrist</a>).</p> <pre><code># found start/end offsets for matched utf-substring (without intersections) use 5.014; use strict; use warnings; use utf8; use Unicode::Collate; binmode STDOUT, ':encoding(UTF-8)'; my $str = "Îñţérñåţîöñåļîžåţîöñ" x 2; my $look = "Nation"; my $Collator = Unicode::Collate-&gt;new( normalization =&gt; undef, level =&gt; 1 ); my @match = $Collator-&gt;match($str, $look); if (@match) { my $found = $match[0]; my $f_len = length($found); say "match result: $found (length is $f_len)"; my $offset = 0; while ((my $start = index($str, $found, $offset)) != -1) { my $end = $start + $f_len; say sprintf("found at: %s,%s", $start, $end); $offset = $end + 1; } } </code></pre> <p>Wrong (but working) solution from <a href="http://www.perlmonks.org/?node_id=485681" rel="nofollow noreferrer">http://www.perlmonks.org/?node_id=485681</a></p> <blockquote> <p>Magic piece of code is:</p> </blockquote> <pre><code> $str = Unicode::Normalize::NFD($str); $str =~ s/\pM//g; </code></pre> <blockquote> <p>code example:</p> </blockquote> <pre><code> use 5.014; use utf8; use Unicode::Normalize; binmode STDOUT, ':encoding(UTF-8)'; my $str = "Îñţérñåţîöñåļîžåţîöñ"; my $look = "Nation"; say "before: $str\n"; $str = NFD($str); # M is short alias for \p{Mark} (http://perldoc.perl.org/perluniprops.html) $str =~ s/\pM//og; # remove "marks" say "after: $str";¬ say "is_match: ", $str =~ /$look/i || 0; </code></pre>
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    1. CO+1 for the hairy example.
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    2. COI don't know if there is any direct support, but you could canonicalize to Fully Decomposed, then strip any characters with a "joining" property (ISTR there is such a property, though not sure what it's called).
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    3. COgooge "perl remove all diacritics" lots of matches which looks promising
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      1. USFredrik Pihl
 

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