Slashdot Mirror

Perl 6 may have been "finally coming within reach" in 2004, but now it's even closer. Reader rnddim writes "The Perl 6 implementation Rakudo Star has been released today for 'early adopters.' This release of Rakudo is different from the normal monthly compiler releases in that it is bundled with a draft of a Perl 6 book, and several modules. It's not complete, and it's not as fast as it should be, but Rakudo in its current state is proving to be usable and useful. Rakudo Star releases will come monthly or as major features or bugfixes are made. It is available for download at github.com."

Perl 6 may have been "finally coming within reach" in 2004, but now it's even closer. Reader rnddim writes "The Perl 6 implementation Rakudo Star has been released today for 'early adopters.' This release of Rakudo is different from the normal monthly compiler releases in that it is bundled with a draft of a Perl 6 book, and several modules. It's not complete, and it's not as fast as it should be, but Rakudo in its current state is proving to be usable and useful. Rakudo Star releases will come monthly or as major features or bugfixes are made. It is available for download at github.com."

chromatic writes "Larry Wall's State of the Onion 11 address is now online. Every year, he describes the state of Perl and its community through metaphor and analogy. This year, Larry explored the history of scripting languages, from their dimly-lit beginnings to their glorious future. Along the way, he also describes several of the design principles invoked in the design of Perl 6. 'When I was a RSTS programmer on a PDP-11, I certainly treated BASIC as a scripting language, at least in terms of rapid prototyping and process control. I'm sure it warped my brain forever. Perl's statement modifiers are straight out of BASIC/PLUS. It even had some cute sigils on the ends of its variables to distinguish string and integer from floating point. But you could do extreme programming. In fact, I had a college buddy I did pair programming with. We took a compiler writing class together and studied all that fancy stuff from the dragon book.'"

chromatic writes "Larry Wall's annual State of the Onion addresses cover subjects such chemistry, science, music, lingustics, and screensavers. They occasionally discuss Perl too. This year's, State of the Onion 10 compares raising children into productive adults to guiding the development and design of a programming language. Perl turns 19 soon; Larry says that she'll truly grow up with Perl 6."

chromatic writes "Perl.com has a new article entitled What is Perl 6?. It analyzes the changes to the language in light of the good and bad points of Perl 5 and provides new information about the current state of the project: Perl 6 exists, you can write code in it today, and it's more consistent and easier to use than Perl 5."

chromatic writes "Perl.com has just published Larry Wall's Ninth Annual State of the Onion address from OSCON 2005. In previous talks, he's used screensavers, music, and Unicode to explore Perl and open source. This year, he introduced the cast of characters in the Perl community in terms of spy movies and metaphors."

autrijus writes "I am delighted to announce that Pugs 6.0.11 is released, with experimental pugscc support to turn Perl 6 programs into stand-alone executables, as well as many new features. Pugs is an implementation of Perl 6, written in Haskell. For more information, see Pugs Apocryphon 1 and this perl.com interview."

Pan T. Hose writes "The long awaited release of Parrot 0.1.1 "Poicephalus" has been finally announced on perl.perl6.internals newsgroup and perl6-internals mailing list simultaneously by Leopold Toetsch followed by an announcement on use Perl by Will Coleda and now also on Slashdot." (Read on for a list of changes since the last release, as well as a number of useful links.) Pan T. Hose continues "The most important changes since the previous version 0.1.0 (code-named 'Leaping Kakapo' and released in February) are:

• Python support: Parrot runs 4/7 of the pie-thon test suite
• Better OS support: more platforms, compilers, OS functions
• Improved PIR syntax for method calls and <op>= assignment
• Dynamic loading reworked including a "make install" target
• MMD - multi method dispatch for binary vtable methods
• Library improvement and cleanup
• BigInt, Complex, *Array, Slice, Enumerate, None PMC classes
• IA64 and hppa JIT support
• Tons of fixes, improvements, new tests, and documentation updates

The amazing project which no one had any idea would go so far from the original April Fool's Joke by Simon Cozens (also posted on Slashdot on April 1, 2001) to really unite Perl and Python one day (not to mention Tcl, Scheme, Forth and Ruby, to name just a few) is now available for download from CPAN and via CVS. Those who are not up-to-date with Perl 6 mailing lists can read This Week in Perl 6 weekly summaries by Piers Cawley to have some idea on how's the project been going in the last two years. It's important to read Apocalypses, Exegeses and Synopses together with RFCs and Parrot Design Documents for better understanding of the underlying rationale, especially the superiority of register-based Virtual Machines (like Parrot VM) over stack-based one (like JVM) for modern (dynamically-typed) OO languages with multiple inheritance, operator overloading, traits, roles and much, much more. Parrot Docs, FAQ and examples are also very helpful. This is a very important step in the direction of Perl 6 which we are all looking forward to."

rjjm writes "Alex Mclean has written a stormin' article at perl.com on Hacking Perl In Nightclubs. Alex programmes live on stage to perform his music."

rjjm writes "Alex Mclean has written a stormin' article at perl.com on Hacking Perl In Nightclubs. Alex programmes live on stage to perform his music."

rjjm writes "Alex Mclean has written a stormin' article at perl.com on Hacking Perl In Nightclubs. Alex programmes live on stage to perform his music."

zachlipton writes "Perl.com has posted Larry Wall's State of the Onion talk from this year's Open Source Convention and The Perl Conference. Through the use of various screensavers, Wall talks a bit about himself, and of course, Perl and Perl 6."

zachlipton writes "Perl.com has posted Larry Wall's State of the Onion talk from this year's Open Source Convention and The Perl Conference. Through the use of various screensavers, Wall talks a bit about himself, and of course, Perl and Perl 6."

FamousLongAgo writes "LOAF (List Of All Friends) is an extension to email that lets you send out address book data without compromising your privacy. LOAF appends a hash-like data structure to each outgoing email, and collects similar attachments from the people who write to you. These files can be queried to see if they contain a given email address, but they can't be reverse-engineered to reveal the list of addresses used to construct them. LOAF lets you check whether someone emailing you for the first time is a complete stranger, or appears in the address books of some of your trusted correspondents. And as a decentralized application, LOAF offers an interesting alternative to current social networking sites like Orkut or Friendster."

johnnyb asks: "I'm curious what everyone's favorite programming language features are. I'm looking for both the general and the specific. I'm especially looking for features that few people know about or use, but are really useful for those who do know about them. What are your favorite programming language features?" "A couple of examples to kick off the conversation:

• Continuations
  
  Continuations are very interesting, because they can be used to implement a number of flow-control features such as exceptions, coroutines, cooperative multithreading, and are better at modelling web interactions. This is a more general feature, but most people use these in conjunction with either scheme or ML.
  
  
• Tuple-returning
  
  It is a huuuuge time-saver when languages like Perl allow functions to return tuples. Instructions like '($a, $b, $c) = $sth->fetchrow_array()' is a wonderful thing.
  
  
• The flip-flop operator [Perl's '..' operator]
  
  Another perlism that I just think is cool. Read more about it here.
  
  

Okay, on to yours!"

rheum101 writes "Larry Wall just released the eagerly anticipated Apocalypse12 . detailing Perl6 OO in all it glories. To quote the author -> 'One other note: if you haven't read the previous Apocalypses and Exegeses, a lot of this is going to be complete gobbledygook to you. (Of course, even if you have read them, this might still be gobbledygook. You take your chances in life...).'"

chromatic writes "Perl.com has just published Exegesis 7, Damian Conway's explanation of how text formatting will work Perl 6 (and now, Perl 5, thanks to his Perl6::Form module) will work. Think of it as Perl 1 for the 21st century. Also, Parrot 0.1.0, the virtual machine for Perl 6 and several other dynamic languages, released on Leap Day -- ever wanted to program in an object oriented assembly language?"

doom writes "For those of you who haven't been paying attention, when the The Perl Cookbook by Tom Christiansen & Nathan Torkington came out in 1999 it immediately became one of the primary references in the perl world. It's one of the first places you should check before making a move with perl, right up there with search.cpan.org, itself. Now we've got the second edition. What's the diff? The diff is 58 new recipes and program examples (list provided below), plus two new chapters on mod_perl and XML (which provide an additional 27)." Read on for doom's complete review. The Perl Cookbook, 2nd Edition author Tom Christiansen & Nathan Torkington pages 927 publisher O' Reilly rating 9 reviewer doom ISBN 0596003137 summary How to do common tasks in perl

The new recipes cover a number of subjects. One of the prominent themes is how to use perl's new unicode support, as well as the new I/O layers feature. The coverage of web programming has definitely been fleshed out with recipes on XML-RPC, SOAP and so on, plus the new chapter on mod_perl. Also of interest of course are the additional recipes on database access with DBI.

The mod_perl chapter is a good succinct introduction, with some very cute recipes in it (though admittedly a lot of these are also covered in the excellent Mod_perl Developer's Cookbook by Young, Lindner and Kobes out from Sams). For example "Transparently Storing Information in URLs" shows how to embed information in any arbitrary position inside a URL. This quickly shows the kind of things you can do with a PerlTransHandler and a PerlFixupHandler. The chapter closes with what looks like a good introduction to "Template Toolkit", which I would probably be very excited about if I wasn't already familiar with the (also discussed) HTML::Mason.

I really enjoyed reading the XML chapter (a subject I'm less familiar with): I predict that you'll find this to be the fastest way through the XALPHABET XSOUP without drowning. For me, this was almost worth the price of the book.

Very little has been removed (hence the page count has gone from 757 to 927), and where I have been able to find a deletion, there are usually very good reasons for it. For example, the first edition takes the trouble to tell us that qr// was introduced in perl 5.005, but the new edition drops the babble about versions there, because for most of us, anything before 5.6 is now ancient history. However, I do miss this particular irrelevant parenthetic aside that's been deleted now:

Remember that the opposite of read is not write but print, although oddly enough, the opposite of sysread actually is syswrite. (split and join are opposites, but there's no speak to match listen, no resurrect for kill, and no curse for bless.)

(p.295, first edition, compare to p.323, second edition.)

In general, it's difficult to think of anything seriously wrong with the Perl Cookbook. I might suggest that in some places they fall into the trap of talking about all the ways to do it, rather than just the best ways, (e.g. recipe 7.5 "Storing Filehandles into Variables" seems a bit complicated).

And maybe there are some slight problems with order of presentation, as with the new perl 5.8 feature of "I/O Layers", which is mentioned a few times before it's finally discussed in the beginning of Chapter 8 (though really, it's amazing that there aren't more problems like this: this is supposed to be reference work, and yet it usually works well as a tutorial also).

I've got one big complaint about the 2nd edition though: they changed the numbering of existing recipes! I've been writing code with comments like

# Schwartzian transform. See Perl Cookbook, recipe 4.15

and now it turns out I should've been specifying an edition number also. Please: "Cookbook" authors, come up with a numbering scheme that remains invariant with new editions... if you can't always just append to the end of the chapter, there's nothing wrong with tacking another dotted decimal on the end. We're programmers, we can handle it.

And speaking of the "Schwartzian transform" that recipe has a very clear, self-explanatory name "Sorting a List by Computable Field", but in the first edition, there was also a footnote explaining that many people call this the Schwartzian Transform, named after Randall Schwartz, who invented the technique. With this second edition, that footnote has been quietly dropped. Guys, if you're going to carry on a feud, this is really not the way to do it. It just makes you look bad.

O'Reilly's perl.com site has a series of articles by the authors, featuring some recipes from the book:

• Cooking With Perl
• Cooking With Perl, part 2
• Cooking With Perl, part 3

Appendix: New recipes and examples (not including the two new chapters):

• Using Named Unicode Characters
• Treating Unicode Combined Characters as Single Characters
• Canonicalizing Strings with Unicode Combined Characters
• Treating a Unicode String as Octets
• Properly Capitalizing a Title or Headline
• Constant Variables
• Implementing a Sparse Array
• Creating a Hash with Immutable Keys or Values
• Matching Nested Patterns
• Writing a Subroutine That Takes Filehandles as Built-ins Do
• Storing Multiple Files in the DATA Area
• Reading an Entire Line Without Blocking
• Treating a File as an Array
• Setting the Default I/O Layers
• Reading or Writing Unicode from a Filehandle
• Converting Microsoft Text Files into Unicode
• Comparing the Contents of Two Files
• Pretending a String Is a File
• Working with Symbolic File Permissions Instead of Octal Values
• Writing a Switch Statement
• Coping with Circular Data Structures Using Weak References
• Program: Outlines
• Overriding a Built-in Function in All Packages
• Customizing Warnings
• Writing Extensions in C with Inline::C
• Cloning Constructors
• Copy Constructors
• Saving Query Results to Excel or CSV
• Escaping Quotes
• Dealing with Database Errors
• Repeating Queries Efficiently
• Building Queries Programmatically
• Finding the Number of Rows Returned by a Query
• Using Transactions
• Viewing Data One Page at a Time
• Querying a CSV File with SQL
• Using SQL Without a Database Server
• Graphing Data
• Thumbnailing Images
• Adding Text to an Image
• Program: graphbox
• Turning Signals into Fatal Errors
• Multitasking Server with Threads
• Writing a Multitasking Server with POE
• Accessing an LDAP Server
• Sending Attachments in Mail
• Extracting Attachments from Mail
• Writing an XML-RPC Server
• Writing an XML-RPC Client
• Writing a SOAP Server
• Writing a SOAP Client
• Program: rfrm
• Using Cookies
• Fetching Password-Protected Pages
• Fetching https:// Web Pages
• Resuming an HTTP GET
• Parsing HTML
• Extracting Table Data

You can purchase The Perl Cookbook, 2nd Edition from bn.com. Slashdot welcomes readers' book reviews -- to see your own review here, read the book review guidelines, then visit the submission page.

doom writes "For those of you who haven't been paying attention, when the The Perl Cookbook by Tom Christiansen & Nathan Torkington came out in 1999 it immediately became one of the primary references in the perl world. It's one of the first places you should check before making a move with perl, right up there with search.cpan.org, itself. Now we've got the second edition. What's the diff? The diff is 58 new recipes and program examples (list provided below), plus two new chapters on mod_perl and XML (which provide an additional 27)." Read on for doom's complete review. The Perl Cookbook, 2nd Edition author Tom Christiansen & Nathan Torkington pages 927 publisher O' Reilly rating 9 reviewer doom ISBN 0596003137 summary How to do common tasks in perl

The new recipes cover a number of subjects. One of the prominent themes is how to use perl's new unicode support, as well as the new I/O layers feature. The coverage of web programming has definitely been fleshed out with recipes on XML-RPC, SOAP and so on, plus the new chapter on mod_perl. Also of interest of course are the additional recipes on database access with DBI.

The mod_perl chapter is a good succinct introduction, with some very cute recipes in it (though admittedly a lot of these are also covered in the excellent Mod_perl Developer's Cookbook by Young, Lindner and Kobes out from Sams). For example "Transparently Storing Information in URLs" shows how to embed information in any arbitrary position inside a URL. This quickly shows the kind of things you can do with a PerlTransHandler and a PerlFixupHandler. The chapter closes with what looks like a good introduction to "Template Toolkit", which I would probably be very excited about if I wasn't already familiar with the (also discussed) HTML::Mason.

I really enjoyed reading the XML chapter (a subject I'm less familiar with): I predict that you'll find this to be the fastest way through the XALPHABET XSOUP without drowning. For me, this was almost worth the price of the book.

Very little has been removed (hence the page count has gone from 757 to 927), and where I have been able to find a deletion, there are usually very good reasons for it. For example, the first edition takes the trouble to tell us that qr// was introduced in perl 5.005, but the new edition drops the babble about versions there, because for most of us, anything before 5.6 is now ancient history. However, I do miss this particular irrelevant parenthetic aside that's been deleted now:

Remember that the opposite of read is not write but print, although oddly enough, the opposite of sysread actually is syswrite. (split and join are opposites, but there's no speak to match listen, no resurrect for kill, and no curse for bless.)

(p.295, first edition, compare to p.323, second edition.)

In general, it's difficult to think of anything seriously wrong with the Perl Cookbook. I might suggest that in some places they fall into the trap of talking about all the ways to do it, rather than just the best ways, (e.g. recipe 7.5 "Storing Filehandles into Variables" seems a bit complicated).

And maybe there are some slight problems with order of presentation, as with the new perl 5.8 feature of "I/O Layers", which is mentioned a few times before it's finally discussed in the beginning of Chapter 8 (though really, it's amazing that there aren't more problems like this: this is supposed to be reference work, and yet it usually works well as a tutorial also).

I've got one big complaint about the 2nd edition though: they changed the numbering of existing recipes! I've been writing code with comments like

# Schwartzian transform. See Perl Cookbook, recipe 4.15

and now it turns out I should've been specifying an edition number also. Please: "Cookbook" authors, come up with a numbering scheme that remains invariant with new editions... if you can't always just append to the end of the chapter, there's nothing wrong with tacking another dotted decimal on the end. We're programmers, we can handle it.

And speaking of the "Schwartzian transform" that recipe has a very clear, self-explanatory name "Sorting a List by Computable Field", but in the first edition, there was also a footnote explaining that many people call this the Schwartzian Transform, named after Randall Schwartz, who invented the technique. With this second edition, that footnote has been quietly dropped. Guys, if you're going to carry on a feud, this is really not the way to do it. It just makes you look bad.

O'Reilly's perl.com site has a series of articles by the authors, featuring some recipes from the book:

• Cooking With Perl
• Cooking With Perl, part 2
• Cooking With Perl, part 3

Appendix: New recipes and examples (not including the two new chapters):

• Using Named Unicode Characters
• Treating Unicode Combined Characters as Single Characters
• Canonicalizing Strings with Unicode Combined Characters
• Treating a Unicode String as Octets
• Properly Capitalizing a Title or Headline
• Constant Variables
• Implementing a Sparse Array
• Creating a Hash with Immutable Keys or Values
• Matching Nested Patterns
• Writing a Subroutine That Takes Filehandles as Built-ins Do
• Storing Multiple Files in the DATA Area
• Reading an Entire Line Without Blocking
• Treating a File as an Array
• Setting the Default I/O Layers
• Reading or Writing Unicode from a Filehandle
• Converting Microsoft Text Files into Unicode
• Comparing the Contents of Two Files
• Pretending a String Is a File
• Working with Symbolic File Permissions Instead of Octal Values
• Writing a Switch Statement
• Coping with Circular Data Structures Using Weak References
• Program: Outlines
• Overriding a Built-in Function in All Packages
• Customizing Warnings
• Writing Extensions in C with Inline::C
• Cloning Constructors
• Copy Constructors
• Saving Query Results to Excel or CSV
• Escaping Quotes
• Dealing with Database Errors
• Repeating Queries Efficiently
• Building Queries Programmatically
• Finding the Number of Rows Returned by a Query
• Using Transactions
• Viewing Data One Page at a Time
• Querying a CSV File with SQL
• Using SQL Without a Database Server
• Graphing Data
• Thumbnailing Images
• Adding Text to an Image
• Program: graphbox
• Turning Signals into Fatal Errors
• Multitasking Server with Threads
• Writing a Multitasking Server with POE
• Accessing an LDAP Server
• Sending Attachments in Mail
• Extracting Attachments from Mail
• Writing an XML-RPC Server
• Writing an XML-RPC Client
• Writing a SOAP Server
• Writing a SOAP Client
• Program: rfrm
• Using Cookies
• Fetching Password-Protected Pages
• Fetching https:// Web Pages
• Resuming an HTTP GET
• Parsing HTML
• Extracting Table Data

You can purchase The Perl Cookbook, 2nd Edition from bn.com. Slashdot welcomes readers' book reviews -- to see your own review here, read the book review guidelines, then visit the submission page.

doom writes "For those of you who haven't been paying attention, when the The Perl Cookbook by Tom Christiansen & Nathan Torkington came out in 1999 it immediately became one of the primary references in the perl world. It's one of the first places you should check before making a move with perl, right up there with search.cpan.org, itself. Now we've got the second edition. What's the diff? The diff is 58 new recipes and program examples (list provided below), plus two new chapters on mod_perl and XML (which provide an additional 27)." Read on for doom's complete review. The Perl Cookbook, 2nd Edition author Tom Christiansen & Nathan Torkington pages 927 publisher O' Reilly rating 9 reviewer doom ISBN 0596003137 summary How to do common tasks in perl

The new recipes cover a number of subjects. One of the prominent themes is how to use perl's new unicode support, as well as the new I/O layers feature. The coverage of web programming has definitely been fleshed out with recipes on XML-RPC, SOAP and so on, plus the new chapter on mod_perl. Also of interest of course are the additional recipes on database access with DBI.

The mod_perl chapter is a good succinct introduction, with some very cute recipes in it (though admittedly a lot of these are also covered in the excellent Mod_perl Developer's Cookbook by Young, Lindner and Kobes out from Sams). For example "Transparently Storing Information in URLs" shows how to embed information in any arbitrary position inside a URL. This quickly shows the kind of things you can do with a PerlTransHandler and a PerlFixupHandler. The chapter closes with what looks like a good introduction to "Template Toolkit", which I would probably be very excited about if I wasn't already familiar with the (also discussed) HTML::Mason.

I really enjoyed reading the XML chapter (a subject I'm less familiar with): I predict that you'll find this to be the fastest way through the XALPHABET XSOUP without drowning. For me, this was almost worth the price of the book.

Very little has been removed (hence the page count has gone from 757 to 927), and where I have been able to find a deletion, there are usually very good reasons for it. For example, the first edition takes the trouble to tell us that qr// was introduced in perl 5.005, but the new edition drops the babble about versions there, because for most of us, anything before 5.6 is now ancient history. However, I do miss this particular irrelevant parenthetic aside that's been deleted now:

Remember that the opposite of read is not write but print, although oddly enough, the opposite of sysread actually is syswrite. (split and join are opposites, but there's no speak to match listen, no resurrect for kill, and no curse for bless.)

(p.295, first edition, compare to p.323, second edition.)

In general, it's difficult to think of anything seriously wrong with the Perl Cookbook. I might suggest that in some places they fall into the trap of talking about all the ways to do it, rather than just the best ways, (e.g. recipe 7.5 "Storing Filehandles into Variables" seems a bit complicated).

And maybe there are some slight problems with order of presentation, as with the new perl 5.8 feature of "I/O Layers", which is mentioned a few times before it's finally discussed in the beginning of Chapter 8 (though really, it's amazing that there aren't more problems like this: this is supposed to be reference work, and yet it usually works well as a tutorial also).

I've got one big complaint about the 2nd edition though: they changed the numbering of existing recipes! I've been writing code with comments like

# Schwartzian transform. See Perl Cookbook, recipe 4.15

and now it turns out I should've been specifying an edition number also. Please: "Cookbook" authors, come up with a numbering scheme that remains invariant with new editions... if you can't always just append to the end of the chapter, there's nothing wrong with tacking another dotted decimal on the end. We're programmers, we can handle it.

And speaking of the "Schwartzian transform" that recipe has a very clear, self-explanatory name "Sorting a List by Computable Field", but in the first edition, there was also a footnote explaining that many people call this the Schwartzian Transform, named after Randall Schwartz, who invented the technique. With this second edition, that footnote has been quietly dropped. Guys, if you're going to carry on a feud, this is really not the way to do it. It just makes you look bad.

O'Reilly's perl.com site has a series of articles by the authors, featuring some recipes from the book:

• Cooking With Perl
• Cooking With Perl, part 2
• Cooking With Perl, part 3

Appendix: New recipes and examples (not including the two new chapters):

• Using Named Unicode Characters
• Treating Unicode Combined Characters as Single Characters
• Canonicalizing Strings with Unicode Combined Characters
• Treating a Unicode String as Octets
• Properly Capitalizing a Title or Headline
• Constant Variables
• Implementing a Sparse Array
• Creating a Hash with Immutable Keys or Values
• Matching Nested Patterns
• Writing a Subroutine That Takes Filehandles as Built-ins Do
• Storing Multiple Files in the DATA Area
• Reading an Entire Line Without Blocking
• Treating a File as an Array
• Setting the Default I/O Layers
• Reading or Writing Unicode from a Filehandle
• Converting Microsoft Text Files into Unicode
• Comparing the Contents of Two Files
• Pretending a String Is a File
• Working with Symbolic File Permissions Instead of Octal Values
• Writing a Switch Statement
• Coping with Circular Data Structures Using Weak References
• Program: Outlines
• Overriding a Built-in Function in All Packages
• Customizing Warnings
• Writing Extensions in C with Inline::C
• Cloning Constructors
• Copy Constructors
• Saving Query Results to Excel or CSV
• Escaping Quotes
• Dealing with Database Errors
• Repeating Queries Efficiently
• Building Queries Programmatically
• Finding the Number of Rows Returned by a Query
• Using Transactions
• Viewing Data One Page at a Time
• Querying a CSV File with SQL
• Using SQL Without a Database Server
• Graphing Data
• Thumbnailing Images
• Adding Text to an Image
• Program: graphbox
• Turning Signals into Fatal Errors
• Multitasking Server with Threads
• Writing a Multitasking Server with POE
• Accessing an LDAP Server
• Sending Attachments in Mail
• Extracting Attachments from Mail
• Writing an XML-RPC Server
• Writing an XML-RPC Client
• Writing a SOAP Server
• Writing a SOAP Client
• Program: rfrm
• Using Cookies
• Fetching Password-Protected Pages
• Fetching https:// Web Pages
• Resuming an HTTP GET
• Parsing HTML
• Extracting Table Data

You can purchase The Perl Cookbook, 2nd Edition from bn.com. Slashdot welcomes readers' book reviews -- to see your own review here, read the book review guidelines, then visit the submission page.

joukev writes "Perl.com is running an article on pVoice. pVoice is an Open Source communication system for severely disabled children written in Perl. I started this for my daughter in 2001. She's still using it and hopefully the medical world will see that there are Open Source alternatives for these kinds of applications. More information on pVoice can be found on the pVoice website (general information) or on the pVoice Developers website."

joukev writes "Perl.com is running an article on pVoice. pVoice is an Open Source communication system for severely disabled children written in Perl. I started this for my daughter in 2001. She's still using it and hopefully the medical world will see that there are Open Source alternatives for these kinds of applications. More information on pVoice can be found on the pVoice website (general information) or on the pVoice Developers website."

chromatic writes "Perl.com has just published Damian Conway's Exegesis 6 which gives practical examples demonstrating how to use the new subroutine and method semantics in Perl 6. This is the companion to Larry Wall's Apocalypse 6 which discussed the changes planned for subroutines in Perl 6."

chromatic writes "Perl.com has just published Damian Conway's Exegesis 6 which gives practical examples demonstrating how to use the new subroutine and method semantics in Perl 6. This is the companion to Larry Wall's Apocalypse 6 which discussed the changes planned for subroutines in Perl 6."

chromatic writes "Perl.com has just published Damian Conway's Exegesis 6 which gives practical examples demonstrating how to use the new subroutine and method semantics in Perl 6. This is the companion to Larry Wall's Apocalypse 6 which discussed the changes planned for subroutines in Perl 6."

JayBonci writes "It may come as a surprise that within the pages of 'Perl 6 Essentials' lies what could be two books, despite its length. If not for lack of cover space, it could easily bear the names "Perl6 for Perl5 programmers" and "Parrot in a Nutshell". Both topics are concise and clearly covered, despite their relatively different audience." Read on for the rest of Jay's review. Perl 6 Essentials author Allison Randal, Dan Sugalski, and Leopold Totsch pages 208 publisher O'Reilly rating 9 reviewer Jay Bonci ISBN 0596004990 summary A solid look ahead at Perl 6, and a reference for Parrot developers

Make no mistake, Perl 6 isn't here yet, but it's coming. The book starts with a good explanation of "the plan"; chapters 1-3 deal with the history, goals, and design considerations of the project. It's a good conceptual overview of the process about how it has been run so far, and how it seems to be continuing. Chapter 3 is of special interest, as it showcases some of the in-depth thought that has been poured into the project. Though we all aren't language theorists, it helps allay some of the fears that change brings while being completely fascinating reading.

This first part of the book isn't very useful without a fairly solid Perl 5 background. It wastes no time in chapter 4 discussing syntactical differences in the v5 to v6 transition. Programmers should be pleased with the practicality of the approach to the new language, as it refers to the new structures and features, and how they solve simple workarounds that Perl veterans are used to in Perl 5. Currying, multimethods, class definitions and structures, new operator syntax, and the dynamics of the new regular expression engine (now called rules) are all touched on, and their values made obvious to the reader.

The last three chapters are for those interested in Parrot development and those who wish to port languages to Parrot. (There are active projects to port Python, Ruby, and even .NET to Parrot.) The section has a slight perl slant to it, but is really about the interpreter and compiling / running Parrot code. It is a fairly complete reference to the different parts of PASM (Parrot Assembly Language), and its role in porting languages to use Parrot. A comfort with assembly language basics is assumed in these sections, as the syntax and concepts of registers and machine code are made easier with general assembler familiarity. This part was somewhat dry for me, as it reads more like a reference than anything else, but it covers the topic fully without droning or leaving anything out. Examples are abundant and range from the simple, to the integrated, and are enough to get people started programming and writing tests with Parrot bytecode.

It should be noted that this book is valid and accurate now, but any development project can make changes quickly. There are places where the authors have admitted that a feature isn't in stone, and is possible to change. According to chromatic, an editor for O'Reilly, the plan is to update the book once a year until Perl 6 is released. Until then, a great place to keep up to date for the casual observer is at the p6p digest. This book goes down a lot easier than the Apocalypses, RFCs, and Exegeses, and I'd heavily suggest it to anyone who is serious about being ready for 6 or joining in on development . I preordered it from Amazon when I saw it was coming out, and am quite happy with my investment.

Table of Contents

1. Project Overview
   • The Birth of Perl 6
   • In the Beginning . . .
   • The Continuing Mission
2. Project Development
   • Language Development
   • Parrot Development
3. Design Philosophy
   • Linguistic and Cognitive Considerations
   • Architectural Considerations
4. Syntax
   • Variables
   • Operators
   • Control Structures
   • Subroutines
   • Classes and Objects
   • Grammars and Rules
5. Parrot Internals
   • Core Design Principles
   • Parrot's Architecture
   • The Interpreter
   • I/O, Events, Signals, and Threads
   • Objects
   • Advanced Features
   • Conclusion
6. Parrot Assembly Language
   • Getting Started
   • Basics
   • Working with PMCs
   • Flow Control
   • Stacks and Register Frames
   • Lexicals and Globals
   • Subroutines
   • Writing Tests
   • PASM Quick Reference
7. The Intermediate Code Compiler
   • Getting Started
   • Basics
   • Flow Control
   • Subroutines
   • IMCC Command-Line Options
   • IMCC Quick Reference

You can purchase Perl 6 Essentials from bn.com. Slashdot welcomes readers' book reviews -- to see your own review here, read the book review guidelines, then visit the submission page.

chromatic writes "One of the highlights of every OSCON is Larry Wall's annual State of the Onion address, covering Perl, philosophy, linguistics, music, theology, science, and usually a few other things thrown in for good measure. His talk from OSCON 2003, State of the Onion 7, is now online."

data64 writes "The latest Apocalypse talks about subroutines. Looks like we finally get type signatures which are way more powerful than the rudimentary prototypes available with Perl5."

cascadefx writes "There is a great article on writing a Vector Space Search Engine in Perl over at the Orielly Network's Perl.com site. Most search engines, such as Google, use a reverse keyword index algorithm. The article, complete with code, proves yet again that there is (definitely) more than one way to do it. Try your hand. Add improvements and you may have a handy search engine for your site or... the next Google-killer."

cascadefx writes "There is a great article on writing a Vector Space Search Engine in Perl over at the Orielly Network's Perl.com site. Most search engines, such as Google, use a reverse keyword index algorithm. The article, complete with code, proves yet again that there is (definitely) more than one way to do it. Try your hand. Add improvements and you may have a handy search engine for your site or... the next Google-killer."

zonker writes "A real, working honest to god Bayesian spam filter. I've been waiting for something like this for a while (since I first read Paul Graham's research paper on this very topic a few weeks ago). Well here's POPFile, a small but extremely effective Perl script that runs on just about any system Perl does. After just a little training was I able to get very effective filtering out of it. From what I understand the new email client that comes with OS X Jaguar has a feature similar to this, but I don't know if it is true Bayesian. Hopefully this kind of feature will become more prevalant in client software as I see the Google results for it are growing."

Jodrell writes: "(via PerlMonks) Bernd Dulfer has posted a Quick Reference Guide to Perl 6, based on Larry's Apocalypses and Damian's Exegesises, as well as Parrot. The Guide is available in POD and RTF formats."

Jodrell writes: "(via PerlMonks) Bernd Dulfer has posted a Quick Reference Guide to Perl 6, based on Larry's Apocalypses and Damian's Exegesises, as well as Parrot. The Guide is available in POD and RTF formats."

prostoalex writes "Come gather round Mongers, whatever you code, And admit that your forehead's about to explode, 'Cos Perl patterns induce complete brain overload, If there's source code you should be maintainin', Then you better start learnin' Perl 6 patterns soon, For the regexes, they are a-changin'. This remix of Bob Dylan serves as an epigraph to Exegesis 5."

BorrisYeltsin writes "Big news in the Perl community this week is that Parrot 0.0.7 now out. New in this release is "Perl 6 grammar (with small, partial compiler), functional subroutine, coroutine and continuation PMCs, global variables, an intermediate code compiler (imcc), a pure-Perl assembler and working garbage collection." Also there are more Parrot docs! Check out the news here."

BorrisYeltsin writes "Big news in the Perl community this week is that Parrot 0.0.7 now out. New in this release is "Perl 6 grammar (with small, partial compiler), functional subroutine, coroutine and continuation PMCs, global variables, an intermediate code compiler (imcc), a pure-Perl assembler and working garbage collection." Also there are more Parrot docs! Check out the news here."

XaXXon writes: "perl.com has Synopsis 5 for Perl 6 up. It's a brief overview of all the changes made in Larry Wall's Apocalypse 5. Lots of stuff about the new regex syntax. I must admit, however, that I'm getting tired of reading about perl 6 -- I want to start using it." We posted Larry Wall's 5th Apocalypse in May.

XaXXon writes: "perl.com has Synopsis 5 for Perl 6 up. It's a brief overview of all the changes made in Larry Wall's Apocalypse 5. Lots of stuff about the new regex syntax. I must admit, however, that I'm getting tired of reading about perl 6 -- I want to start using it." We posted Larry Wall's 5th Apocalypse in May.

XaXXon writes: "perl.com has Synopsis 5 for Perl 6 up. It's a brief overview of all the changes made in Larry Wall's Apocalypse 5. Lots of stuff about the new regex syntax. I must admit, however, that I'm getting tired of reading about perl 6 -- I want to start using it." We posted Larry Wall's 5th Apocalypse in May.

Simon Cozens writes "The Apocalypses are Larry Wall's explanation of the design of Perl 6. In Apocalypse 5, Larry turns to redesigning regular expressions. He set out to intentionally 'break' a lot of the regular expression culture we're all used to, and these are the results - and they're mindblowing."

Simon Cozens writes "The Apocalypses are Larry Wall's explanation of the design of Perl 6. In Apocalypse 5, Larry turns to redesigning regular expressions. He set out to intentionally 'break' a lot of the regular expression culture we're all used to, and these are the results - and they're mindblowing."

mtve writes: "Have you ever seen source code that is valid on four languages: Perl, C, Befunge, and BrainF*ck? During last Perlgolf season famous Perl hacker Jérôme Quelin submit such inconceivable masterpiece and now he published expanded explanation of his solution. Caution: that text can hurt your mental health. Play Perlgolf!"

BorrisYeltsin writes "perl.com has Exegesis 4 from the Damian, in repsonse to Larry's latest Apocalypse. This installment covers news of the new flow and block control changes, fully integrated exceptions and some other cool stuff!"

BorrisYeltsin writes "perl.com has Exegesis 4 from the Damian, in repsonse to Larry's latest Apocalypse. This installment covers news of the new flow and block control changes, fully integrated exceptions and some other cool stuff!"

BorrisYeltsin writes "perl.com has Exegesis 4 from the Damian, in repsonse to Larry's latest Apocalypse. This installment covers news of the new flow and block control changes, fully integrated exceptions and some other cool stuff!"

moyix writes: "There's an article over at perl.com that describes how to use a perl module called Quantum::Entanglement. Using this module, one can simulate programming for a quantum computer. Developers looking to keep their skills current well into the next decade should check this out ;) Debian folks can grab libquantum-entanglement-perl and libquantum-superpositions-perl."

chromatic writes: "Larry Wall's latest explanation of Perl 6 features, Apocalypse 4 has been posted on Perl.com. That means Damian Conway's explanatory Exegesis can't be far behind. Looks like some nice simplifications this time around."

chromatic writes: "Larry Wall's latest explanation of Perl 6 features, Apocalypse 4 has been posted on Perl.com. That means Damian Conway's explanatory Exegesis can't be far behind. Looks like some nice simplifications this time around."

fxn points to this "article from Dr. Dobbs's Jounal on the recent Lightweight Languages Workshop, held at MIT's AI Lab." This is a nice followup to Simon Cozen's report on the conference, posted here in November.

BorrisYeltsin writes: "A couple of updates for Parrot are in a recent This Week on Perl 6, most imporantly Parrot 0.03 is out! Get it here , the release notes are here. Also Adam Turoff has got together the Parrot FAQ version 0.2 which addresses some of the more common questions about Parrot and Perl 6."