Re: Perl grammar for Perl5 -> Perl6
Is there such a Perl5->Perl6 translator underway? I started toying with one, but didn't get very far yet. PPI (on CPAN) would be a good way to start, but it needs to be extended to be used as a Perl5->Perl 6 translator. Greetings, Christian -- [EMAIL PROTECTED] - http://christian.web42.com - http://www.web42.com/crenz/ "If the Creator really did write himself into his own story, that's what we ought to expect to see. Creative solutions. And this creativity is intended to be transitive. We are expected to be creative. And we're expected to help others be creative." -- Larry Wall
Re: Perl 6 fears
Feel free to add your own, or fears you heard about! Fear: Perl 6 will not attract enough interested developers and companies to gain momentum. People will continue to be excited about digital watches and PHP 5. Regards, Christian -- [EMAIL PROTECTED] - http://christian.web42.com - http://www.web42.com/crenz/ "If God were a Kantian, who would not have us till we came to Him from the purest and best motives, who could be saved?" -- C.S. Lewis, The Problem of Pain
Re: State of Design Documents
Not really, except insofar as we've talked about compact classes of native types working like C structs. There are lots of nitty things we can fix with pack/unpack, but the basic underlying problem is that pack/unpack are defined operationally rather than declaratively. I think it's worth taking a look at Marcus Holland-Moritz' powerful Convert::Binary::C ( http://search.cpan.org/dist/Convert-Binary-C/ ). It already offers a way to declaratively convert to/from binary data, which could serve as inspiration for a similar Perl6 interface. Greetings, Christian Renz -- [EMAIL PROTECTED] - http://www.web42.com/crenz/ - http://www.web42.com/ "If God were a Kantian, who would not have us till we came to Him from the purest and best motives, who could be saved?" -- C.S. Lewis, The Problem of Pain
Re: P6ML?
of crap known as XSL. An XML-based derivative that performs XML transformations, allowing/using embedded P6 regexs, closures, etc., and able to more easily translate XML <==> P6 data. I'm still quite XML-phobic, but I see the need for strong XML support in Perl 6. However, I'd like to work with XML in Perl 6 in a way that I don't even notice it's XML. Would it be possible to come up with an interface to XML that is at least as intuitive as tie is for hash<->DBM file? And that can cope with megabyte-sized XML files? In fact, if we're talking about data storage only, it would be interesting to have such a tie that allows me to store my data in an XML file, YAML file, SQL database etc. XML transformations sounds to me like it would be useful to be able to transform data that is structured according to one grammar into another grammatical structure. (Please excuse my long sentences.) Is that already possible with Perl 6 Grammars? (Please excuse my ignorance.) If yes, we might even think about an C-to-Intercal translator. (Please excuse me, Dan.) creating a P6-specific companion to ASP/JSP/PHP, but one that's substantially more OO in nature... Although it doesn't end in P, I'd add Zope to that list. Definitely sounds like a killer-app for Perl 6. Greetings, Christian -- [EMAIL PROTECTED] - http://www.web42.com/crenz/ - http://www.web42.com/ "No Christian and, indeed, no historian could accept the epigram which defines religion as 'what a man does with his solitude.'" -- C.S. Lewis, The Weight of Glory
Re: Apocalypse 6: Possible file-transfer glitch?
It survived a few refreshes, so I wonder if it's a file-transfer problem? No, Larry is just presenting additional proof that we need Unicode operators in Perl 6 by using them in English, too. :) Greetings, Christian -- [EMAIL PROTECTED] - http://www.web42.com/crenz/ - http://www.web42.com/ "The human mind has no more power of inventing a new value than of imagining a new primary color, or, indeed, of creating a new sun and a new sky for it to move in." -- C.S. Lewis, The Abolition of Man
Re: AW: "my int( 1..31 ) $var" ?
Now, I might be stupid, but I keep asking myself what you would need a
property for in this example. To me, it totally confuses the
underlying structure. When was the last time you asked an integer to
identify itself as a valid credit card number?
It is _not_ a property of the integer that it is a valid cc number,
rather it happens that it will be accepted as valid _by a certain
authority_. So why not go and ask the authority? Compare the case to a
phone number -- the phone number itself doesn't know if its valid. You
could only check a certain format (if e.g. in the USA, in Germany,
that would be very hard). To check the validity, query a directory
server or ask a phone to dial the number. Don't check the number
itself.
To provide even stronger evidence against using properties, consider
the fact that a credit card number will only be accepted with an
expiration date and -- with good merchants -- the three or four-digit
security code on the back of the card. Now you're up to doing
something like
# funky syntax ahead
my $cc = [ num => "8765 4321", expdate => "0799", code => "123" ];
# do magic
# ...
print "I'm rich!" if $cc.prop{CreditCard("CAMELCARD")};
Ouch! I may be conservative, but again I think you should go and ask
the authority (ie., a validation service). The authority in this case
probably is already encapsulated in a CPAN module and could look like
this:
use CreditCard::Validation;
deduct(10_000_000) if validate($number, $expdate, "PERLIAN EXPRESS");
or something like
use CreditCard::Validation qw(ISA CAMELCARD MONKSCLUB);
deduct(10_000_000) if validate($number, $expdate, $bankcode);
depending on your tastes. Yep, it doesn't use funky perl 6 syntax, but
it SWIMs (Says What I Mean, ie. it is readable).
Greetings,
Christian
--
[EMAIL PROTECTED] - http://www.web42.com/crenz/ - http://www.web42.com/
"If God were a Kantian, who would not have us till we came to Him from
the purest and best motives, who could be saved?"
-- C.S. Lewis, The Problem of Pain
Re: 'while <> {' in Perl 6
>I was wondering whether the Perl 'while (<>){' idiom will continue to
>be supported in Perl 6?
Actually, I once found myself wondering why while doesn't set $_ all
the time anyway... It would be nice to do things like
while ($iterator->each()) { ... }
while (query->nextResult()) { ... }
Setting $_ would be just what I would expect perl to do, only that it
doesn't do it.
Greetings,
Christian
--
[EMAIL PROTECTED] - http://www.web42.com/crenz/ - http://www.web42.com/
"Thirty was so strange for me. I've really had to come to terms with
the fact that I am now a walking and talking adult." -- C.S. Lewis
split suggestion
perl 5 already does that: print "'$_' " foreach split /(=)/, "rank=?"; print "\n"; print "'$_' " foreach split /\s*(=)\s*/, "rank = ?"; print "\n"; # Output: # 'rank' '=' '?' # 'rank' '=' '?' Greetings, Christian -- [EMAIL PROTECTED] - http://www.web42.com/crenz/ - http://www.web42.com/ "Faith (...) is the art of holding onto things your reason has once accepted, in spite of your changing moods." -- C.S. Lewis, Mere Christianity
