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   <H1>[cam.pm] Christmas Perl Programming
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    <B>Nicholas Clark
    </B> 
    <A HREF="mailto:nick%40unfortu.net"
       TITLE="[cam.pm] Christmas Perl Programming">nick@unfortu.net
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    <I>Tue, 10 Dec 2002 11:38:05 +0000</I>
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<PRE>On Tue, Dec 10, 2002 at 10:53:15AM +0000, Matthew Byng-Maddick wrote:
&gt;<i> On Tue, Dec 10, 2002 at 10:50:03AM +0000, Philip Kendall wrote:
</I>&gt;<i> &gt; On Sat, Dec 07, 2002 at 02:40:09AM +0000, Matthew Byng-Maddick wrote:
</I>&gt;<i> &gt; &gt; * a valid programme entry (such as the example below) can be overlaid by
</I>&gt;<i> &gt; &gt;   the template below in such a way that the characters in the entry are
</I>&gt;<i> &gt; &gt;   non-whitespace if the corresponding character in the template is a &quot;#&quot;
</I>&gt;<i> &gt; &gt;   and that they are whitespace if the corresponding character is a &quot; &quot;.
</I>&gt;<i> &gt; &gt;   Trailing space will be ignored.
</I>&gt;<i> &gt; How are 'character' and 'whitespace' defined?
</I>&gt;<i> 
</I>&gt;<i> I feel &quot;codepoint&quot; and &quot;thing that matches /\s/&quot; respectively, is probably
</I>&gt;<i> appropriate, if you're going to bring Unicode madness into it...
</I>
I've forgotten if there was an acceptable list of perl versions published in
the rules. The UTF8 regexp code is not perfect, and several bugs have been
fixed in the development version, and merged across into 5.8.1-to-be.

Mainly bugs to do with matches and other upper/lower casing on $1 (etc) from a
previous match, such as this code:

#!/usr/bin/perl -w

for my $a (0,1) {
  $_ = 'readin,database,readout';
  if ($ARGV[0])  {
    $_ .= chr 256;
    chop;
  }
  /(.+)/;

  my @d = split /[,]/,$1;
  print join (':'<A HREF="mailto:,@d">,@d</A>), &quot;\n&quot;;
}
__END__

Without any arguments (not utf8) I see:

readin:database:readout
readin:database:readout

with $ARGV[1] true, in 5.8.0 I see:

#adin:database:readout
readin:database:readout

The bug has been found and fixed by AMS in the development tree. They seem to
related to how things like uppercase tables get initialised the first time
they are used.

Nicholas Clark
-- 
Brainfuck better than perl?	<A HREF="http://www.perl.org/advocacy/spoofathon/">http://www.perl.org/advocacy/spoofathon/</A>


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