There may be a better way, but when ive needed to do this ive used something like: 
use strict;
use warnings;

sub make_tr {
        my $from=quotemeta(shift);
        my $to  =quotemeta(shift);
        (my $opts=shift || "")=~tr/cdsCDS/cdscds/d;
        my $tr=eval "sub { (defined \$_[0] ? \$_[0] : \$_)=~tr/$from/$
+to/$opts}";
        die "$@" if $@;
        return $tr;
}
my $tr=make_tr('A-Z','a-z');
my $x="YaBaDaBaDo";
$tr->($x);
print $x,"\n";
$_="FOO";
$tr->();
print;
__END__
yabadabado
foo

[download]
Which returns a subroutine that can do the desired translation on the fly. Note that it works on $_ if a parameter isnt supplied, and returns the same thing that tr/// would. Itll die if the eval fails.

Good Luck.

update Forgot the quotemeta() on the first post... And beefed up the $opts cleaning... And added the my()s that are in my local version but not in the original. Sigh.

--- demerphq
my friends call me, usually because I'm late....

In reply to Re: Transliteration!!! by demerphq
in thread How to eval a tr/// (was: Transliteration!!!) by Anonymous Monk

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