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Re^3: Unicode combining characters as hash keys?

by Jim (Curate)
on Sep 03, 2011 at 21:52 UTC ( #924019=note: print w/replies, xml ) Need Help??

in reply to Re^2: Unicode combining characters as hash keys?
in thread Unicode combining characters as hash keys?

It still doesn't work though. The error message complains about not finding $nfd_letter in the hash…

Hmm. Very odd. There is no variable named $nfd_letter in your script.

This complete, self-contained, pared-down script…

#!perl use strict; use warnings; use charnames qw( :full ); use Unicode::Normalize; binmode STDOUT, ':encoding(UTF-8)'; # Lookup table of IPA properties by IPA symbol my %properties_by = ( d => [ qw( 0 0 ) ], a => [ qw( 0 1 ) ], NFD("\N{LATIN SMALL LETTER ALPHA}\N{COMBINING TILDE}") => [ qw( 1 0 ) ], s => [ qw( 1 1 ) ], ); # List of IPA phonemes my @phonemes = ( "das", "d\N{LATIN SMALL LETTER ALPHA}\N{COMBINING TILDE}s" ); # For each IPA phoneme... for my $phoneme (map { NFD($_) } @phonemes) { # ...examine each IPA symbol in it... for my $symbol ($phoneme =~ m/(\X)/g) { # ...and look up each symbol's IPA properties... my $properties = join ", ", @{ $properties_by{$symbol} }; print "$phoneme\t$symbol\t$properties\n"; } } exit 0;

…produces this output…

das	d	0, 0
das	a	0, 1
das	s	1, 1
dɑ̃s	d	0, 0
dɑ̃s	ɑ̃	1, 0
dɑ̃s	s	1, 1

By the way, there is no precomposed Unicode character that is the Latin small letter alpha with a tilde. So all the Unicode normalizations of "\N{LATIN SMALL LETTER ALPHA}\N{COMBINING TILDE}" are exactly the same—and exactly that.

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