On Sat, Apr 11, 2009 at 14:11, Kelly Jones <kelly.terry.jo...@gmail.com> wrote:
> I'm trying to convert UTF-8 to ASCII in Perl. Is there an easy way to
> do this?
>
> I tried Unicode::UTF8simple, but ended up w/ many ctrl-a's, which
> can't be right.
>
> I'm going for an extremely complete transliteration, so I want ETH
> (for example) to be converted to both "d" and "dh". In other words, my
> input is ONE string, but my return value is a LIST of strings.
>
> My goal: create an ASCII version of geonames' alternateNames table.
Hmm, I don't know of any functions off the top of my head that do that
sort of thing. You might try searching CPAN[1]. If you don't find
anything you like, I would start by building a table like
my %utf8_to_ascii = (
"\N{LATIN SMALL LETTER ETH}" => [ qw/ d dh / ],
);
Note, to use "\N{LATIN SMALL LETTER ETH}" instead of "\x{F0}" you will
need to use the charnames[2] pragma. You could then break the string
into individual characters and create a list of all possible outcomes:
#!/usr/bin/perl
use strict;
use warnings;
my %map = (
a => [ qw/ aa ab / ],
e => ['y'],
);
for my $word (qw/ bad bed base /) {
print "$word =>\n",
map "\t$_\n", expand(romanize($word, \%map));
}
#produce a compact representation of the possible strings
sub romanize {
my ($word, $map) = @_;
my @string;
for my $char (split //, $word) {
my @chars = $map->{$char} ? @{$map->{$char}} : ($char);
push @string, \...@chars;
}
return @string;
}
#expand the compact representation into all possible strings
sub expand {
my @string = @_;
my @result;
return @{$string[0]} if @string == 1;
for my $char (@{$string[0]}) {
for my $string (expand(@string[1 .. $#string])) {
push @result, join '', "$char$string";
}
}
return @result;
}
1. http://search.cpan.org/
2. http://perldoc.perl.org/charnames.html
--
Chas. Owens
wonkden.net
The most important skill a programmer can have is the ability to read.
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